Answers
The velocity in each case is;
a ) 33.9 m/s
b) 0.0799 m/s
What is the momentum?We know that in dealing with these collision problems we have to bear in mind the law of the conservation of the linear momentum which states that the momentum before collision is equal to the momentum after collision.
Then we know that;
Momentum before collision = momentum after collision
a) (65 + 0.15) * 2.5 + = (0.15 * 32) + (65 * v)
v = velocity of the skater after throwing the ball
v = 162.9/4.8
v = 33.9 m/s
b) (60 * 0) + (0.15 * 32) = (60 + 0.15) v
v = combined velocity of the skater and the snowball
v = 4.8/60.15
v = 0.0799 m/s
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Related Questions
Listen4 conditions that may result in emission of electrons from conductor
Answers
Answer: 1. Thermal Excitation: Electrons can be emitted from a conductor when it is heated to high temperatures and the energy generated is enough to break the bond between the electrons and the atoms in the conductor.
2. Electrical Excitation: When a conductor is subjected to a strong electric field, electrons can be emitted as a result of the field's strength. This is known as the field emission effect.
3. Photoelectric Effect: Electrons can be emitted from a conductor when it is exposed to light, especially ultraviolet light. This effect is known as the photoelectric effect.
4. Electron Bombardment: Electrons can be emitted from a conductor as a result of bombardment by other high-energy electrons. This process is known as secondary electron emission and is commonly used in electron microscopy.
Explanation:
how is the process carried out in a photovoltaic cell similar to what occurs in human vision
Answers
In both a photovoltaic cell and human vision, the process of converting light energy into usable energy takes place through the movement of electrons.
How does light energy work in photovoltaic cell and human vision?In a photovoltaic cell, light energy is absorbed by the semiconductor material, which causes electrons in the material to become excited and move from their normal position. These excited electrons are then collected and sent through an external circuit, where they can be used as an electrical current.
Similarly, in human vision, light energy is absorbed by the retina, which causes a chemical reaction that leads to the movement of electrons within the cells of the retina. These excited electrons then trigger a cascade of events that eventually lead to the creation of an electrical signal in the brain, which is interpreted as vision.
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In both the eyes and the photovoltaic cells, light falls on receptors.
What is the photovoltaic cell ?We know that the photovoltaic cell is composed of cells that are receptors on which light can be able to fall and the light that falls on them is able to cause the emission of electrons and this would lead to the production of electricity.
In the case of the human vision, there is the impact of light on the rod and the cone cells which would make impulses to the transmitted to the brain so that we can see well.
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An engine develops a power of 750watts while moving a car at constant velocity 3m/s therefore the work exerted on the car by the engine is. And please I need the solution
Answers
The work exerted on the car by the engine is 250 Joules.
What is Work?
Work is a physical quantity that is defined as the force applied to an object over a distance. It is a scalar quantity and is measured in units of joules (J) in the International System of Units (SI). The formula for work is W = F x d, where F is the force applied and d is the distance over which the force is applied.
The work exerted on the car by the engine can be calculated using the formula:
Work = Power x Time
Since the car is moving at a constant velocity, we can calculate the time it takes for the engine to exert the given power by using the formula:
Velocity = Work / Time
So, we can find time by using:
Time = Work / Velocity
Substituting the given values, we have:
Time = (750 watts) / (3m/s)
Therefore, the work exerted on the car by the engine is:
Work = Power x Time
Work = 750 watts x (750 watts / 3m/s)
Work = 750 * 250 Joules
So, the work exerted on the car by the engine is 250 Joules.
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two ropes tied to a tree branch hold up a child swing as shown in figure 7 . the tension in each rope is 2.28N.what is the combined force (magnitude and direction) of the two ropes one the swing?
Answers
The magnitude of the combined forces is 4.56 N in a direction of 13⁰.
What is the combined tension of the two ropes?
The combined force of the two ropes one the swing is calculated by resolving the tensions into x and y components.
The sum of the x component of the forces is calculated as follows;
x = 2.28 cos ( 13 ) + 2.28 cos ( 13 )
x = 4.44 N
The sum of the y component of the forces is calculated as follows;
y = 2.28 sin ( 13 ) + 2.28 sin ( 13 )
y = 1.03 N
The magnitude of the resultant force is calculated as;
F = √ ( 4.44² + 1.03² )
F = 4.56 N
The direction of the forces is calculated as follows;
θ = arc tan ( 1.03 / 4.44 )
θ = 13⁰
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Which of the following relationships concerning two masses and the gravity between
them is true?
O the smaller the distance, the smaller the gravitational force between them
O the larger the masses, the larger the gravitational force between them
O the larger the distance, the larger the gravitational force between them
O the smaller the masses, the larger the gravitational force between them
H
DE
Answers
The following relationships concerning two masses and the gravity between;The larger the masses, the larger the gravitational force between them.
What is the gravity ?
Gravity is the force of attraction between two objects that is caused by their mass. It is a fundamental force of nature that is responsible for the formation, shape and trajectory of the universe. It is responsible for keeping the planets and stars in their orbits and for keeping us on the ground. Gravity is a very weak force and its effects are only noticeable when objects have a very large mass. It is the weakest of the four fundamental forces, but is the dominant force in the universe on the large scale. Gravity acts on all objects in the universe, regardless of their size, shape or composition. Gravity is a universal force that cannot be switched off or blocked.
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which one is the strongest
Answers
Answer:
answer
Explanation:
3 from left
2 from right
Q2. A ball is projected vertically upwards with speed
36 ms from a point on the ground. Find:
(a)the velocity of the ball after 3 seconds
(b )the time of flight of the ball
Show all working
Answers
From a position on the ground, a ball is thrown 36 m/s vertically upward. The speed of the falling ball is given by v = -9.8 (m/s2) t j.
When a ball is thrown vertically upwards with velocity of 20?The ball is going upward, even if its upward motion is occurring at a lower velocity. In light of this, the ball's velocity is also positive. The gravitational force is what causes the acceleration that the body experiences. From the top of a multi-story building, a ball is hurled vertically and at a speed of 20 meters per second. The ball is thrown from a location that is 25 meters above the ground in height.
The greatest height of the ball can be calculated using the vertical motion model, h=-16t2 + vt+s, where v is the initial velocity in feet/second and s is the height in feet. From the top of a multi-story building, a ball is hurled vertically and at a speed of 20 meters per second.
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Based on the data, which environment did the coal bed used to be?
Answer options with 4 options
A.
a dry desert
B.
a wet swamp
C.
a cold tundra
D.
a mountain top
Answers
Answer: a
Explanation:
I just guessed you should too
These deserts are characterized by cold winters with snowfall and heavy rainfalls that occur frequently in the winter and infrequently in the summer. These regions include the Antarctic, Greenland, and the Nearctic region, all of which have seasons with exceptionally heavy rainfall.
What is a cold desert biome?Over one-fifth of the surface of the globe is covered by deserts. Where there is less than 50cm of annual rainfall, deserts develop. Although the majority of deserts, like the Sahara in North Africa and the deserts in the southwest United States, Mexico, and Australia, are found at low latitudes, there is a different type of desert called a cold desert that can be found in the Utah and Nevada basin and range region as well as in some regions of western Asia. Both specialized plants and specialized vertebrate and invertebrate creatures are common in deserts. As a result of their high productivity and lack of organic matter, soils frequently have an abundance of nutrients. Flooding is a common result of quick, intermittent, powerful rainfall that generate unexpected fires, cold weather, and sporadic flooding.Due to the fact that many of them cannot conserve water or endure the heat, deserts have a relatively low density of large mammals. In order to avoid the light, they are also too big to skulk beneath rocks or underground. Non-mammalian vertebrates, such as reptiles, are the dominate creatures in warm deserts. The kangaroo mice of the deserts of North America are an example of how little mammals often are.According on a number of traits, desert biomes can be categorized.Deserts can be divided into four main categories:Arid and HotSemiarid Coastal Cold.To Learn more About deserts refer To:
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A spaceship traveling in space at a constant velocity of 800ms-1
launches a probe towards a distant
planet.if
the probe is launched with a velocity relative
to the spaceship.
of
600 ms-1 in a direction at right
angles to
the
Flight path of
the spaceship,Calculate the resultant velocity of the probe
Answers
The resultant velocity of the probe is 1000 ms-1 at an angle of 36.87 degrees relative to the flight path of the spaceship.
What is a vector sum?A vector sum, also known as a vector addition, is the process of combining two or more vectors to find a resultant vector. The vectors being added together can be in any dimension, such as two-dimensional or three-dimensional. The process of vector addition is represented graphically by placing the tail of one vector at the head of another vector, and then drawing a vector from the tail of the first vector to the head of the second vector.
To find the resultant velocity, we can use the Pythagorean theorem to find the magnitude of the velocity vector and the angle between the two velocity vectors.
The magnitude of the velocity vector is the square root of (800^2 + 600^2) = 1000 ms-1.
The angle between the two velocity vectors can be found by using the inverse tangent function (arctan), where tan(θ) = opposite/adjacent, which is arctan(600/800) = arctan(0.75) = 36.87 degrees.
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A force F is exerted on a 5 kg block to move it across a rough surface, as shown above. The magnitude of the force is initially 5 N, and the block moves at a constant velocity. While the block is moving, the force is instantaneously increased to 12 N. How much kinetic energy does the block now gain as it moves a distance of 2 m?
Answers
Explanation:
The work done by a constant force is given by the equation W = Fd, where W is the work done, F is the force, and d is the distance moved.
The initial force of 5 N does no work, because it is balanced by the friction force. So, the work done by the increased force of 12 N can be found as follows:
W = Fd = 12 N x 2 m = 24 J
The work done on an object is equal to the change in its kinetic energy, so the increase in the block's kinetic energy is 24 J.
A heavy object is dropped from a vertical height of 55.4 m. What is its speed when it hits the ground?
Answers
Answer:
The equation you are seeking is v^2 = u^2 + 2fs
so v^2= 2x9.8x8
which is about 12.52 m/s.
But, as I've been good, I should point out that you should be able to think through how to get that equation from first principles. Then:
You won't need to learn it - it will stick with you, and you'll never need to ask again.
Explanation:
Answer:
32.952 m/s²
Explanation:
Use the third equation of motion.
v² = u² + 2as
u = 0
v = ?
a = 9.8 m/s²
s = 55.4
v² = 0 + 2 x 9.8 x 55.4
v = √(19.6 x 55.4) = 32.952 m/s²
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the distance covered by a car at a time t is given by x = 20t + 6t^2 . calculate the instantaneous velocity and acceleration when t = 1s
Answers
The velocity is 22 m/s while the acceleration is 12 m/s^2.
What is the instantaneous velocity?We know that the velocity can be obtained from the equation that have been given for the distance that is covered. We know that we have been given the distance that is covered as; x = 20t + 6t^2
Then we know that;
Velocity = dx/dt = 20 + 12t
Velocity = 20 + 12(1) = 22 m/s
The acceleration can be obtained from;
Acceleration = d^2x/dt^2 = 12 m/s^2
Thus we have used the equation to obtain the velocity and the acceleration.
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PROJECT: ROOM DESIGN
Here are your goals for this project:
Gain skills in practical techniques of interior decoration.
Learn the basics of furniture arrangement from room to room.
Demonstrate skill in producing visual enrichment through two-dimensional and three-dimensional objects.
Document in a notebook how you would design your bedroom.
Complete the following activities. Present your completed assignments to your teacher for evaluation.
When an architect designs a room or rooms, he has to follow certain guidelines or rules to make the whole house more livable. It is important to know some of the standard rules that architects use, not only if we would wish to create a brand-new room, but also to help us understand the existing room we have chosen to decorate. Here are some of these standard rules:
Doors should swing into rooms.
Less space is wasted if the door is near the corner of the room and swings into the corner.
In the house as a whole, all doors—entrance, closet, bathroom—should be grouped together to conserve wall space when possible.
Bedrooms should be planned to have the maximum amount of wall space.
Windows in a bedroom are generally higher on the wall than they are in other rooms to allow space for furniture underneath and to provide more privacy.
Take a look at your room and see if it conforms to the rules previously stated. Identify the good points and the bad points of your room in 150 words. Use the writing space provided with this assignment. As you continue through this unit, you should be able to find ways to improve your room through the techniques and special treatments discussed.
this is family and consumer science.
Answers
To design your bedroom, start by determining the overall style and aesthetic of the bedroom. This could be traditional, modern, contemporary, or a combination of styles.
How to design the bedroom?Measure the space to determine the size and layout of the room. Take into account any existing features such as windows, doors, and architectural details.
Choose a color scheme for the room. This could be based on the overall style of the room, or on personal preferences. Select furniture pieces that are both functional and stylish. A bed is the most important piece of furniture in a bedroom, so choose one that is comfortable and fits the overall style of the room.
Add finishing touches such as lighting, decor, and accessories. This can include table lamps, floor lamps, overhead lighting, artwork, and textiles such as rugs, curtains, and bedding.
Consider the storage options in the room. Finally, arrange the furniture and decor in the room to create a cohesive and balanced look. Make sure to leave enough open space for movement and circulation.
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18 which graph represents y=x²-b.
where b is a positive real number?
J
M
N
b.
VA
√6
M
√√6
√b
V
Answers
Graph of the function Linear equation y = [tex]x^{2}[/tex] - b will be a straight line.
Define a linear equation.A linear equation is a first order (linear) term plus a constant in the algebraic form y=mx+b, where m is the slope and b is the y-intercept. Sometimes, the aforementioned is referred to as a "linear equation of two variables," where x and y are the variables.
In general, a straight line has the equation y = mx + c, where m denotes the gradient and y = c denotes the point at which the line intersects the y-axis. The y-axis intercept is denoted by the value c.
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Is this energy resource used in a centralized way (like a large central power plant that serves and area) or a distributed way (at or near the homes and buildings it provides power for)?
Answers
A microgrid is a self-sufficient energy system that provides power to a specific geographic area, such as a neighborhood, business district, hospital complex, or college campus.
What is Microid?One or more types of distributed energy (solar panels, wind turbines, combined heat and power plants, and generators) are used in microgrids to generate power.
In addition, a lot of more recent microgrids have energy storage, usually in the form of batteries. Additionally, several now have stations for charging electric cars.
This sets microgrids apart from the massive, centrally located grids that have supplied the majority of our electricity for the past century.
Therefore, A microgrid is a self-sufficient energy system that provides power to a specific geographic area, such as a neighborhood, business district, hospital complex, or college campus.
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A ball is dropped from a height of 78.4 m above the ground. How long does it take to hit the ground?
Answers
Answer: it would take 4 seconds
Explanation:
Which element has 3 energy levels and 8 valence electrons
Answers
Answer:
argon
Explanation:
argon has 18 protons and 18 electrons there are 2
electrons on the first energy level,8 electrons on the second enery level and 8 on the third
PLEASE HELP ASAP! 100 PTS! 5 QUESTIONS - Pls Show Your Work!!!!
1. Two carts are pushed apart with a spring attached to one of the carts. The carts have masses of 1.2 kg and 2.5 kg. The 2.5 kg cart (Cart B) has a velocity of 1.5 m/s after they spring apart. Find the velocity of the 1.2 kg. cart.
2. An 6,000 kg train car moves at 20.0 m/s until it bumps into a stationary 6,000 kg car and latches onto it. What is the speed of the two cars linked together?
3. A single 1,000 kg train car moving at 5.0 m/s collides with the back of two 1,000 kg train cars linked together. It latches onto the car it strikes as the two parts of the coupled cars exert forces on each other. What is the speed of the cars immediately afterward?
4. A 15.0 kg cart and a 20 kg cart are locked together with a compressed spring between them. They are then released so that the spring pushes the two carts apart. The 20 kg cart is moving at 5.0 m/s afterward. How fast is the 15.0 kg cart moving?
5. A firecracker stuck into a 150 g apple explodes and sends five apple fragments in different directions. The vector sum of momenta 1, 2, 3, and 4 is found from a video of the event to have components px = 1.20 kg m/s, py = 0.80 kg m/s (with no other component). The mass of the fifth fragment is 0.050 kg. What is its velocity right after the explosion?
Answers
The total momentum, both before and after, is (2m)(v/2) = mv, which is equal to the total mass times the velocity of the Centre of mass.
How do you find the momentum of two objects after a collision?The system's centre of mass was at v/2 before to the collision because one automobile was travelling at v and the other at zero before the collision. Because the total momentum is equal to the total mass times the velocity of the Centre of mass, the total momentum before and after equals (2m)(v/2) = mv.
K.E1 = 1/2 m1u21 + 1/2 m2u22 is the kinetic energy of the masses prior to contact. The collision's kinetic energy, however, is given by K.E2 = 1/2 (m1 + m2) v2. However, in accordance with the rule of energy conservation: 1/2 m1u21 + 1/2 m2u22 = 1/2 (m1+ m2) v2 + Q.
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A dogs owner walks 20.0 meters due west and then walks 45 degrees south of west a distance of 150 meters. Where is he with respect to where he started?
Answers
The displacement of the dog from its starting position is determined as 136.6 m.
What is the displacement of the dog?
The displacement of the dog is calculated by applying the following formula as shown below.
d² = a² + b² - 2 ( a x b ) x cos (Ф)
where;
a is the initial positionb is the final positionФ is the angel or direction of motionThe resultant displacement is calculated as follows;
d² = 20² + 150² - 2 ( 20 x 150 ) x cos (45 )
d² = 18,657.36
d = √ ( 18,657.36 )
d = 136.6 m
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Name four factor that will influence the resistance of a conductor
Answers
Answer:
v, i, T, r
Explanation:
v, i, T, r
The combined mass of Maggie and her snowmobile is 326 kg. In an attempt to chase her brother Jason, she accelerates from 6.6 m/s to 25.9 m/s in a time of 18.0 seconds
Answers
The acceleration of the combined mass of Maggie and her snowmobile will be 1.072 meters per second square.
What is the equation of motion?If the acceleration is constant throughout the motion. Then the equation of the motion is given as,
v = u + at
Where 'v' is the final velocity, 'u' is the initial velocity, 't' is the time, and 'a' is the acceleration.
In an attempt to chase her brother Jason, she accelerates from 6.6 m/s to 25.9 m/s in a time of 18.0 seconds.
Then the acceleration is calculated as,
25.9 = 6.6 + a(18)
18a = 19.6
a = 1.072 meters per second square
The acceleration of the combined mass of Maggie and her snowmobile will be 1.072 meters per second square.
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a concave mirror of radius of corvature 30cm produced an inverted image 4 times the size of an object placed perpendicular to the axis. Determine the position of the object and the image?
Answers
Hope it helps.
If you have any query, feel free to ask.
1. Rectifiers:
A crystal diode having internal resistance rf = 200 is used for half-wave
rectification. If the applied voltage v = 50 sin o t and load resistance
RL=800 22, find:
(A) Im, Idc, Irms
(B) A.C. power input and D.C. power output
(C) d.c. output voltage.
(D) Efficiency of rectification.
Answers
A crystal diode having internal resistance rf = 200 is used for half-wave
rectification. If the applied voltage v = 50 sin o t and load resistance
RL=800 22- Efficiency of rectification. So, option (d) is correct.
What is voltage?
An electrical circuit's power source exerts pressure known as voltage on charged electrons (current), causing them to flow through a conducting loop and perform tasks like lighting a lamp. Voltage is measured in volts and is simply equal to pressure (V).
What is rectification?
Using one or more P-N junction diodes, a rectifier is a piece of electronic equipment that changes alternating electricity into direct current. As a one-way valve that only permits current to flow in one direction, a diode functions as a device. Corrective action is the name for this process.
Therefore, crystal diode having internal resistance rf = 200 is used for half-wave rectification. If the applied voltage v = 50 sin o t and load resistance
RL=800 22- Efficiency of rectification. So, option (d) is correct.
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What is the cost of running a 3.1 kilowatt (kW) air conditioner for 8
hours while you are at school (at a cost of 16 cents per kilowatt hour)?
221 cents
397 cents
812 cents
453 cents
Please help giving BRIANLESS
Answers
397 cents is the cost of running a 3.1 kilowatt (kW) air conditioner for 8
hours.
How do we calculate cost?To calculate your overall cost, add your fixed and variable costs. The technique for determining a business's total costs is rather straightforward, much like with personal budgets: Total Cost = Fixed Costs + Variable Costs.You add your fixed and variable costs and divide the total by the quantity of units you generate to arrive at your cost per unit. Cost per Unit = (Total Fixed Costs + Total Variable Costs) / Total Units Produced is the formula for calculating cost per unit.Fixed costs, variable costs, direct costs, and indirect costs are the four basic categories into which costs are divided.Making judgements on price, manufacturing volume, and sales while also determining the expenses of the goods and services the group sells.Given data :
cost per kilowatt hour = 16 cents
Total hours = 8 hours
Total power consumed = 3.1 KW
Cost for 3.1 KW = 16 x 3.1 = 49.6
Total cost for power consumed for 8 hour = 49.6 x 8
= 396.8 to 397 cents
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For the following vector, convert from magnitude and direction to x and y coordinates
T= 3, y= 7
Answers
Theta(angle)= 66.80 degree
Solve for s.
S- 7.39
-2
S=
= -0.69
Answers
Answer: 6.01
Explanation:
s-7.39 = -1.38
s = -1.38 + 7.39 = 6.01
Answer:
The answer is 6.01
Explanation:
[tex] \frac{s - 7.39}{( - 2)} = ( - 0.69) \\ [/tex]
Multiply both sides by (2) we get,
[tex]s - 7.39 = ( 2)( - 0.69)[/tex]
[tex]s - 7.39 = - 1.38[/tex]
Add both sides 7.38 we get,
[tex]s - 7.39 + 7.39 = - 1.38 + 7.39[/tex]
[tex]s = 6.01[/tex]
Thus, The value of s is 6.01
What is the weight of a 2.50-kg bag of sand on the surface of the earth?
Answers
Answer:
24.5 N
Explanation:
W = mg = (2.5 kg)(9.8 m/s²) = 24.5 N
A string is stretched between two clamps held 4.04 m apart. The string is made to oscillate at its third harmonic frequency.
Calculate the distance in m between two adjacent nodes
Answers
The distance in m between two adjacent nodes is 1.01 m.
What is oscillation?
Oscillation is the repeating or periodic change of a quantity around a central value or between two or more states, often in time. Alternating current and a swinging pendulum are two common examples of oscillation.
The distance between two clamps = 4.04 m.
The string is made to oscillate at its third harmonic frequency.
At its third harmonic frequency, the distance between two clamps is equal to 3/2 the of its wavelength.
Hence, the distance in m between two adjacent nodes is = 44.04/4 m = 1.01 m.
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What was discovered between the number of wire coils on an electromagnet and magnetic fields?
Answers
The electromagnetic field increases by increasing the number of wire coils. Hence, the electromagnetic field and the number of wire coils are directly proportional to each other.
What is an electromagnetic field?Invisible magnetic and electric fields of force combine to form electromagnetic fields. They are produced by both human activities, mostly via the usage of electricity, as well as by natural processes like the Earth's magnetic field.
When charged particles, like electrons, are accelerated, an electromagnetic field, also known as an EM field, is created. Electric fields surround all electrically charged particles. Magnetic fields are created when charged particles are in motion.
the electromagnetic field and the number of wire coils are directly proportional to each other.
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You weigh 780 N.
What would you weigh if the Earth were
seven times as massive as it is and its radius
were five times its present value?
Answer in units of N.
Answers
If the Earth were seven times as massive as it is and its radius were five times its present value, your new weight will 218.4 N.
What is your weight?
Your weight is the measure of force of gravity on you. So weight depends on the value of acceleration due to gravity.
W = mg
where;
m is massg is acceleration due to gravityThe formula for acceleration due to gravity is given as;
g = ( GM ) / ( R² )
where;
G is universal gravitation constantM is the mass of the EarthR is the radius of the EarthIf the Earth were seven times as massive as it is and its radius were five times its present value, the new acceleration due to gravity will be calculated as;
g' = ( G x 7M ) / (5R)²
g' = ( 7 / 25 ) ( GM / R² )
g' = 7/25 (g)
So the new acceleration due to gravity will reduce by a factor 7/25, and same will happen to your initial weight.
new weight = 7/25 x 780 N = 218.4 N
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