Answers
Answer:
it be the mean i think add them up through 0 -3 and divide by 3
Explanation:
Related Questions
The amount of kinetic energy (KE) depends on the mass of a moving object.
True
False
Answers
Answer: True
Explanation: To calculate KE you use 1/2 Mass x velocity^2
A car starts from rest and travels 33m in 4 seconds. How far will it travel in 8 seconds?
Answers
Answer: 66m
Explanation:
If the car travels 33m in 4 seconds, the car travels at a speed of 33/4 meters per second.
Using this, we can find the distance traveled in 8 seconds, which is
33/4*8
= 66
Therefore, we can find that the car travels 66m in 8 seconds.
What type of electromagnetic wave is sent as a signal by a cell phone to the nearest cell tower?
Answers
The type of electromagnetic wave sent as a signal by a cell phone to the nearest cell tower is radio waves.
Cell phones use radio waves, a type of electromagnetic radiation, to communicate with the nearest cell tower. Radio waves have the longest wavelength and the lowest frequency of all electromagnetic waves. They fall within the frequency range of 3 kHz to 300 GHz. They are used for a wide variety of communications including television and radio broadcasting, cell phone and satellite communications, and wireless networking.
When a call is made or data is sent on a cell phone, the phone sends out a radio frequency (RF) signal to the nearest cell tower. The tower then sends the signal to the intended recipient. The signal is sent using a specific frequency band that is assigned for cellular communication. This frequency band is divided into smaller frequency channels and each channel is assigned to a specific cell phone call or data transfer.
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Answer: The type of electromagnetic wave sent as a signal by a cell phone to the nearest cell tower is radio waves.
Explanation: Cell phones use radio waves, a type of electromagnetic radiation, to communicate with the nearest cell tower. Radio waves have the longest wavelength and the lowest frequency of all electromagnetic waves. They fall within the frequency range of 3 kHz to 300 GHz. They are used for a wide variety of communications including television and radio broadcasting, cell phone and satellite communications, and wireless networking.
2. The diagram below shows two charged spheres that are separated by a distance of 3.8 x 104 m.
What is the force between the two spheres, and is it attractive or repulsive? SHOW ALL WORK
- 3.8 X 10-4 m
K
A
5.2 X 10-6 C
B
-6.2 x 10-6 C
Answers
The charges are of the same type. As a result, any force exerted between them will be repulsive.
What exactly is force?
Force is an influence that causes an object to accelerate, decelerate, or change its direction of motion. It is a vector quantity, meaning it has both magnitude (strength) and direction. Examples of forces include gravity, friction, electromagnetic fields, and the applied force of pushing or pulling on an object.
The charges of the same nature repel each other because of the electrostatic force of repulsion. This is because like charges have the same sign and the electrostatic force of repulsion between them is stronger than the attraction between opposite charges. This repulsive force increases as the distance between the charges decreases. This is why two objects with the same charge will be pushed away from each other.
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4. A car travels at a speed of v = 54 km/h. During emergency braking, the wagon decelerates (brakes) with a deceleration (braking) of 3m/s per second. a) Convert the speed into the unit m/ s.b) Calculate how long the braking lasts. c) Sketch the v-t diagram and calculate the braking distance!
Answers
The given velocity is 54km/hr, which, when converted to m/s using 1km = 1000m and 1 hour = 3600 seconds, equals 15m/s.
How to calculate distance?Now substitute the initial speed u = 15m/s values.
v = 0m/s as the final velocity
Time is 6 seconds.
In the a= -3 m/ s2 equation,
s= ut + 1/2at2 s= 15 6+ 1/2(-3)(6)2 s= 90-45 s = 45m
As a result, after using the brakes, the car will halt for up to 45 meters.
The inverse of acceleration is deceleration. The deceleration will be calculated by dividing the final velocity minus the initial velocity by the time required for the velocity drop.
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The tracking of the direction of the wind as it moves from areas of
high pressure to areas of low pressure is
Answers
Tracking wind direction from high pressure areas to low pressure areas is called the Coriolis effect.
What is the Coriolis effect?As air tries to move from high to low pressure in the atmosphere, the Coriolis force diverts the air so that it follows the pressure contours. This means that in the Northern Hemisphere, air is blown anticlockwise around low pressure and clockwise around high pressure.
Winds flow counterclockwise (cyclonically) around low pressure and clockwise (anticyclonically) around high pressure at the surface. These systems' actual pressure can be measured in either inches of mercury or millibars.
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Are we more than flesh and blood ?
Answers
All human being are more than flesh and Blood we can do mechanical , Inteligence and other things that only blood and Flesh can not make up.
What is Human Body Composition ?Only six elements make up the majority of the human body: oxygen, hydrogen, nitrogen, carbon, calcium, and phosphorus. The remaining mass is composed of sulphur, potassium, sodium, chlorine, and magnesium, which together make up around 0.85% of the total mass. These 11 components are all necessary components.
Cells, which are regarded as the basic building blocks of life, make up every living thing. Even one-celled creatures are sophisticated! Atoms create molecules, which create the cell organelles and structures within each cell. Similar cells form tissues in multicellular organisms.
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What force is required to move a 4 kg object in a circle with an acceleration of 5.7 m/s2?
Answers
Answer: Therefore, to move a 4 kg object in a circle with an acceleration of 5.7 m/s², it requires a force of 22.8 Newton.
Explanation:
What force is required to move a 4 kg object in a circle with an acceleration of 5.7 m/s²?
Data:
F = force =
m = mass = 4 kg
a = acceleration = 5.7 m/s²
To solve, we apply the formula of Newton's Second Law, which is F = m * a, it is not necessary to solve, since we want to calculate the force, then
F = m * a F = 4 kg * 5.7 m/s² F = 22. 8 NTherefore, to move a 4 kg object in a circle with an acceleration of 5.7 m/s², it requires a force of 22.8 Newton.
To learn at https://brainly.com/question/18994284To learn at https://brainly.com/question/7889391To learn at https://brainly.com/question/4960343Formula for force:
[tex]F=ma[/tex]
force(measured in newtons) = mass(measured in kg) * acceleration(measured in m/s^2)
__________________________________________________________
Given:
[tex]m=4kg[/tex]
[tex]a=5.7m/s^2[/tex]
[tex]F=?[/tex]
__________________________________________________________
Finding force:
[tex]F=ma[/tex]
[tex]F=4\times5.7[/tex]
__________________________________________________________
Answer:
[tex]\fbox{F = 22.8 Newtons}[/tex]
"a crate is released from the highest point of a 12m ramp inclined at 45 degrees with the horizontal. The motion is frictionless. What is the speed of the crate at the base of the ramp? "
Answers
Answer:
mgh=1/2 m v^2
Explanation:
mgh=1/2 m v^2
v =sqrt( 2gh)
A ball is dropped from the top of a building. After 2 seconds, its velocity is measured to be 19.6 m/s. Calculate the acceleration for the dropped ball.
Answers
9.8m/s²
Explanation:
the acceleration is the acceleration due to gravity which is 9.8 m/s² downwards.
for proof;
V=u+at
where v=final velocity
u= initial velocity
t=time
u=0, v=19.6m/s, t=2
19.6=0+a×2
19.6=2a
a=19.6/2
a=9.8m/s²
Identify the source of thermal energy in an internal combustion engine.
Answers
The source of thermal energy in an internal combustion engine is the combustion of fuel.
What is thermal energy?Thermal energy is the energy contained within a system that controls its temperature. The flow of thermal energy is defined as heat. The internal combustion engine works by igniting a mixture of fuel and air inside the engine's cylinders.
The combustion process releases heat energy, which is used to heat up the working fluid (usually air) which then expands and generates mechanical power to move the vehicle. This process converts the chemical energy stored in the fuel into thermal energy which then converted into mechanical energy to move the vehicle.
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Answer: combustion of fuel
Explanation:
This penalty is imposed when an offense is made by a team or when the actual offender is unknown.
Unscramble: ENHCB NOMIR
Answers
This penalty in ice hockey is imposed when an offense is made by a team or when the actual offender is unknown is called bench minor penalty.
What is bench minor penalty ?The least severe kind of punishment is a minor one. Two minutes constitute a minor penalty. In most circumstances, the guilty player's side will play with fewer players due to the penalty box assignment.
Any skater who was on the ice at the time of the offence may serve the penalty if the team is handed a bench minor penalty (charged against the team rather than an individual player) and the offending player is the goalkeeper or a coach.
Rarely, if the player who committed the offence gets injured during the same play, the penalty may also be served by anybody else who was on the ice.
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Answer:
minor bench,
Explanation:
nomir should be pretty easy, put the M at the start because it is the most reasonable letter to put at the start. I knew that it was obviously minor
enhcb I knew was bench because minor bench obvi
A jet aircraft being launched from an aircraft carrier is accelerated from rest along a 94-meter track for 2.5s. What is the launch speed of the jet?
Answers
Explanation:
To solve for the launch speed of the jet, we need to use the equation of motion: v = at, where v is the final velocity, a is the acceleration and t is the time.
Given, a = 94m / (2.5s)^2 = 18.72 m/s^2
And t = 2.5s
So, v = at = 18.72 m/s^2 x 2.5s = 46.8 m/s.
Therefore, the launch speed of the jet is 46.8 m/s.
Answer:
46.8 m/s.
Explanation:
Jacobie wanted to test the projectile motion of a pumpkin. His hypothesis was if the pumpkin had a larger mass, then the higher he could throw it, because the larger pumpkins would have more force. He bought three orange pumpkins and tested them all on the same day. His results are shown at right. Does the data support his hypothesis?
Answers
The data does not support his hypothesis because the heaviest mass travelled the least distance.
How does mass affect the height travelled by an object?The weight of an object is the force of gravity acting on the object and the force of gravity increases with increase in the mass of the object.
W = mg
where;
m is the mass of the objectg is acceleration due to gravityBased on law of conservation of energy;
P.E = K.E
mgh = ¹/₂mv²
h = ( v² ) / ( 2g )
The height travelled by an object increases with increase in speed of the object and heavier objects will have greater speed, hence travel greater height.
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The complete question is below:
Jacobie wanted to test the projectile motion of a pumpkin. His hypothesis was if the pumpkin had a larger mass, then the higher he could throw it, because the larger pumpkins would have more force. He bought three orange pumpkins and tested them all on the same day. His results are shown at right. Does the data support his hypothesis?
5kg = 10meters
10kg = 5 meters
15kg = 1 meter
How much water at 17° C needs to be mixed with 204 g of water at 85° C for the final temperature to be 67° C?
Answers
“We are observing wasted heat in everyday life for example in Pakistan heavy generated are installed, during their supply of electricity an excessive amount of wasted heat is produced in its surrounding, similarly when we drive a vehicle a heat is available in the surrounding of engine of that vehicle, we can also see many more such examples of wastage of heat. This heat is effecting the environment of Pakistan badly.
Is it conceivable to convert this wasted heat into some useful work/energy/electricity or not. If yes how? If no why
Answers
It is indeed possible to convert wasted heat into useful work, energy, or electricity. This process is known as "waste heat recovery," and it involves capturing the heat that is normally released into the environment and using it to generate electricity or to perform other useful work.
What are the ways to convert wasted heat into electricity?There are several ways to convert wasted heat into useful energy or electricity:
Heat exchangers: These devices transfer heat from one fluid to another, and can be used to capture heat from industrial processes, engines, and other sources.Thermoelectric generators: These devices use the difference in temperature between two materials to generate electricity. They can be used to capture heat from engines, industrial processes, and other sources.Organic Rankine Cycle (ORC) systems: These systems use a working fluid (such as water or a special fluid) to convert heat into mechanical energy, which can then be used to generate electricity.Combined heat and power (CHP) systems: These systems generate electricity and heat simultaneously, by using waste heat to generate electricity and using the heat generated by the electricity-generating process to heat buildings or other spaces.In Pakistan, it is possible to recover the wasted heat generated by the power plants and use it to generate electricity or perform other useful work. The government of Pakistan should invest in technology and research to develop these systems to minimize the environmental impact of wasted heat and to improve energy efficiency.
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An amusement park ride consists of a rotating
circular platform 8.73 m in diameter from
which 10 kg seats are suspended at the end
of 3.76 m massless chains. When the system
rotates, the chains make an angle of 23.9◦ with
the vertical.
The acceleration of gravity is 9.8 m/s^2
Answers
The centripetal acceleration of the system is: a_c = (v^2)/r , v = (r * ω) An amusement park ride consists of a rotating.
What is centripetal acceleration?
Centripetal acceleration is the acceleration of an object in a curved path. It is directed towards the center of the circle and is equal to the square of the object's velocity divided by the radius of the circle.
Where ω is the angular velocity of the system
ω = 2πf
Where f is the frequency of rotation
f = (1/T)
Where T is the period of rotation
T = (2π * (8.73m/2))/ (3.76m/s)
v = (r * (2π * (1/T)))
a_c = ((r * (2π * (1/T)))^2)/r
a_c = (2π^2 * (8.73m/2)^2 * (1/T^2))/ (8.73m/2)
a_c = (2π^2 * (8.73m/2) * (1/T^2))
a_c = (19.64 * (1/T^2))
a_c = (19.64 * (1/((2π * (8.73m/2))/ (3.76m/s))^2))
a_c = (19.64 * (1/((2π * (4.365m))/ (3.76m/s))^2))
a_c = (19.64 * (1/(2π * (1.163m/s))^2))
a_c = (19.64 * (1/(2π * (1.163m/s))^2))
a_c = 19.64 * (1/3.8139)
a_c = 5.12 m/s^2
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At t=3s, Bob was at x=9. If Bob has an average velocity of -4/s, what is his velocity at 11s?
Answers
The velocity of Bob at 11 seconds is 4.27 m/s.
What is the velocity of Bob at 11 seconds?
The velocity of Bob at 11 seconds is calculated by applying average velocity formula as shown below.
v = ( total displacement ) / ( total time )
v = ( X₃ + X₁₁ ) / ( 3 + 11 )
where;
X₃ is the displacement at 3 secondsX₁₁ is the displacement at 11 secondsv is the average velocity = 4 m/s4 = ( 9 + 11u ) / ( 14 )
where;
u is the velocity at 11 sThe velocity of Bob at 11 seconds is calculated as;
4 = ( 9 + 11u ) / 14
9 + 11u = 56
11u = 56 - 9
11u = 47
u = 47 / 11
u = 4.27 m/s
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Does changing the amount of a substance change its mass volume or density
Answers
Changing the amount of a substance changes its mass or volume but won't change its density.
What is Density?This is used to describe how compact a material is and it is also the mass per unit volume of a material substance with its S.I unit being grams per cubic centimetre.
We should note that hanging the amount of a substance changes its mass or volume .However ,if the amount of matter is increased without changing the volume, then the density increases which is therefore the reason why it was chosen as the correct choice.
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The burning of gasoline in
a car releases about
3.0 X 104 kcal/gal. If a car averages 41 km/ gal when driving 110 km/h, which requires 25 hp, what is the efficiency of the engine under those conditions?
Answers
3.0 x 104 kcal/gal are released during gasoline combustion in an automobile. 18650 watts (converted into horsepower) divided by 78836 gave me an efficiency of 23.46%.
How to find the calculation?What is the engine's efficiency at those speeds if a car averages 41 km/gallon when traveling at 90 km/h, which takes 25 hp? Although I believe I have the right solution, I'm not sure. 746 watts are equivalent to 1 horsepower. 25 horsepower is equal to 18650 watts. 1 kcal equals 4186 joules (watts per second). (Ql / Qh) - 1 = e = W / Qh 2.26 gallons will be consumed in an hour if you go at 91 km/hr and utilize 1 gal/41 km. The 1 - Ql / Qh is not necessary, in my opinion, as no temperatures are specified. 34883 joules/sec result when I convert 30000 kcal/gal to watts. Due to the use of 2.26 gal, 78836 is the result of multiplying the above by 2.26. 18650 watts (converted into horsepower) divided by 78836 gave me an efficiency of 23.46%.To Learn more About gasoline combustion refer To:
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In the Growing Plants activity within the lesson, you were asked to set up 3 pots:
Pot A: Bean seed, 2 lights on, 0 mL of water
Pot B: Bean seed, 2 lights on, 30 mL of water
Pot C: Bean seed, 2 lights on, 70mL of water
Which plant had the greatest height and mass at the end of 50 days?
A
B
C
Answers
The plant that had the greatest height and mass at the end of 50 days is Pot B
Which plant has the greatest height?We have to note that in the growth of the plants there are some parameters that we know to be very essential and those things that are very essential must be there if the plant is to grow and reproduce well.
The most essential things that the plant needs so as to function are;
a) Light
b) Water
c) Nutrients
If the water is too much, it can prevent the plant from getting to germinate and then grow up well in the soil.
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1- Find the center of mass of the three-mass system shown in Fig. Specify relative to the left-hand 1.00-kg mass.
1.00 kg
1.50 kg 1.10 kg
0.50 m
0.25 m
Answers
The center of mass of the three-mass system will be 0.438
What is a center of mass?
A position relative to an object or set of objects is known as the center of mass. It is the system's average location, weighted by the mass of each component. The center of mass is situated at the centroid for straightforward stiff objects with homogeneous density.
The first mass m1 = 1.00 kg
The second mass m2 = 1.50 kg
The third mass m3 = 1.10 kg
If the origin of the system is from the mass m1
The distances from the origin to the masses are
x1 = 0
x2 = 0.5 m
x3 = (0.5 + 0.25) m = 0.75 m
Center of mass = (m1x1 + m2x2 + m3x3) / (m1+m2+m3)
= (1*0 + 1.5*0.5 + 1.1*0.75) / (1+1.5+1.1)
= 0.438
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which of the following set of tools would be most useful in an experiment measuring the rate of thermal energy in four different liquids?
Answers
In the metric mks system of units, the letter k stands for
Answers
In the metric MKS system of units, the letter k stands for kilogram (kg).
What is MKS system of units?The metre, kilogram, and second (MKS) serve as the foundational units in the MKS system of units, which is a physical method of measurement. The International System of Units (SI) is built on top of it, albeit SI has since been modified with new fundamental constants.
Following the Metre Convention of 1875, work on the kilogramme and metre international prototypes began. These prototypes were officially approved by the General Conference on Weights and Measures (CGPM) in 1889, formalizing the MKS system by utilizing the kilograms and metre as base units.
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A pulse has a speed of 5cm.s^-1 how far does it travel in 2,5
Answers
The distance travelled by the pulse in 2.5 seconds is 12.5 cm.
What is the distance travelled by the pulse in 2.5 seconds?
The distance travelled by the pulse in 2.5 seconds is calculated by applying the speed, time and distance equation as shown below.
Mathematically, speed, distance and time equation is given as;
d = v x t
where;
v is the speed of the pulset is the time of motion of the pulseThe distance travelled by the pulse in 2.5 seconds is calculated as;
d = ( 5 cm/s ) x ( 2.5 s )
d = 12.5 cm
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The complete question is below:
A pulse has a speed of 5cm.s^-1 how far does it travel in 2.5 seconds?
Which graph represents y=x²-b.
where b is a positive real number?
J
K
L
M
N
Answers
According to the question,M is a positive real number.
What is the positive ?
The positive is having an optimistic outlook on life. It means looking on the bright side of things, maintaining a positive attitude, and having hope for the future. Having a positive attitude can help you to stay motivated and focused, even when things get tough. It can also help you to build strong relationships with others and make the most of opportunities. Being positive can lead to greater success and improved well-being.It can also help you to build strong relationships with others and make the most of opportunities. Being positive can lead to greater success and improved well-being.
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Pulley system is marked wih a Mechanical Advantage of 2.5. A worker applies 450n to the pulley in an attempt to lift a sound system with a 1500n weight. Of this task we could say that:
Answers
The worker must apply 600N of force to lift the sound system. The mechanical advantage of 2.5 means that the worker only needs to apply 600N of force to lift the sound system.
What is Pulley system?We can employ pulley systems to provide ourselves a mechanical advantage by multiplying our input effort to apply more force to a load.
They can be used to apply tension within a system, such as in a Tensioned Line or Tyrolean, in addition to their traditional uses of hauling and lifting loads. The basic operating principles of pulley systems are explained on this page; for details on how to use them for hauling, check the topic on hauling systems.
The dynamic unit of Newtons is commonly used to express force, which is an impact that has both magnitude and direction (N). On this page, kilograms have been utilized for the sake of clarity.
Therefore, The worker must apply 600N of force to lift the sound system. The mechanical advantage of 2.5 means that the worker only needs to apply 600N of force to lift the sound system.
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In a certain lab experiment, a spring gun was placed on a table and fired a steel ball horizontally outward. A student determines that the ball starts 1.0 m above the floor and travels 2.7 m before striking the floor
In a certain lab experiment, a spring gun was placed on a table and fired a steel ball horizontally outward. A student determines that the ball starts 1.0 m above the floor and travels 2.7 m before striking the floor.
(a) Determine the time that the ball is in the air. (2 pts)
(b) Determine the initial velocity of the ball. (2 pts)
Answers
a) The time that the ball is in the air is 0.23 second.
b) The initial horizontal velocity of the ball is 11.74 m/s.
What is velocity?
The rate at which a body's displacement changes in relation to time is known as its velocity. Velocity is a vector quantity with both magnitude and direction.
Vertical height of the point = 1.0 meter.
The horizontal distance travelled by the ball = 2.7 m.
a) The time that the ball is in the air is = √(H/2g)
= √(1.0/2×9.8)
= 0.23 second
b) The initial horizontal velocity of the ball is = 2.7 m/0.23 s
= 11.74 m/s
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An object is placed 40 mm away from a diverging lens with a focal length of 10 cm. Find the object distance and determine whether the image is upright or inverted and real or virtual.
Answers
The distance between the object and a diverging lens is -20 cm and the image is virtual and inverted.
How to calculate object's distance?The object distance for this scenario is 40 mm, as given in the problem statement.
To determine the image properties, we need to use lens equation which is 1/f = 1/u + 1/v where f is the focal length, u is the object distance and v is the image distance.
Using the given information, the lens equation can be written as:
1/10 = 1/40 + 1/v
Solving for v, we get:
v = -20 cm
As the image distance is negative, it means that the image is virtual and inverted.
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The wave speed on a string is 155 m/s when the tension is 78.0 N .What tension will give a speed of 177 m/s ?
Answers
If the linear mass density of the string stays constant, a tension of 4.92 x 10⁴ N will result in a wave speed of 177 m/s.
Examples of wave speed formula what is it?When the wavelength and wave frequency are known, the wave speed equation may be used to get the wave speed. Think about a wave in the water that has a 1 hertz frequency and a wavelength of 3 metres. Speed is calculated as follows: Speed = 3 m x 1 wave/s = 3 m/s.
v = √(T/μ)
where v is the wave speed, T is the tension in the string, and μ is the linear mass density of the string (mass per unit length).
To solve for the tension T, we may rearrange this equation as follows:
T = μv²
So, if we want to find the tension required to give a wave speed of 177 m/s, we can plug in the given values and solve for T:
T = μv² = (155 g/m) x (177 m/s)² = 4.92 x 10⁴ N
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