The energy needed by a stove to transfer heat completely to 1 g of liquid water fro 1 °C to 25 °C is 100.37 J.
What is energy?Energy is the ability or the capacity to do work.
To calculate the amount of energy, we use the formula below.
Formula:
Q = cm(t₂-t₁).............. Equation 1Where:
Q = Amount of energyc = Specific heat capacity of the waterm = mass of the watert₂ = Final temperaturet₁ = Initial temperatureFrom the question,
Given:
m = 1 g = 0.001 kgc = 4182 J/kg°Ct₁ = 1 °Ct₂ = 25 °CSubstitute these values into equation 1
Q = 0.001(4182)(25-1)Q = 100.37 JHence, The energy required is 100.37 J.
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Taking into account the definition of calorimetry, the energy that a stove must transfer to completely heat 1 g of liquid water from 1 °C to 25 °C is 100.416 J.
Definition of calorimetryCalorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.
When heat added or removed from a substance causes a temperature change in it without affecting its molecular structure, it is called sensible heat.
So, the expression that allows to calculate heat exchanges is:
Q = c× m× ΔT
where:
Q is the heat exchanged by a body of mass m.c is the specific heat substance.ΔT is the temperature variation.Energy in this caseIn this case, you know:
Q= ?c= 4.184 J/gCm= 1 gΔT= Tfinal - Tinitial= 25 C - 1 C= 24 CReplacing in the definition of calorimetry:
Q = 4.184 J/gC× 1 g× 24 C
Solving:
Q= 100.416 J
Finally, the energy needed is 100.416 J.
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Find the y-component of this
vector:
47.3 m
39.4°
Answer: 36.55
Explanation:
Answer:it is 30.03
Explanation:
I have three energy levels, with 10 electrons in my outer energy level. What am I?
I have three energy levels, with 10 electrons in my outer energy level. I am calcium.
What are energy levels?Energy levels refer to the regions around an atom where electrons can be found.
The energy levels are given by the principal quantum number, n.
Electrons in an atom are arranged in energy levels.
An atom that has three energy levels belong to period 3 of the periodic table.
The outermost energy level for an atom that has three energy levels is energy level 3.
The atom that has 10 electrons in the outermost energy level of 3 will have 10 + 8 + 2 electrons = 20 electrons.
The element is calcium.
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Pls helpppppppppppppppp
Answer:
Explanation:
velocity describes the directional speed of an object in motion as an indication of its rate of change in position (includes magnitude but not the direction) while acceleration is the change in velocity (inculdes direction and magintude)
During a thunderstorm, why do you see the lightning before you hear the thunder?
Answer:
light travel faster than sound
Explanation:
because light, travels at about 300,000,000 meters per second, travels much faster than sound, which travels at 340 meters per second
A magnetic field points out of the page with B = 0.75 T . The wire shown carries a current of 69 A and has a length of 30 cm . What is the force exerted on the wire?
The force that acts on the conductor is obtained from the calculation as 15.5 N.
What is the force carried by the wire?We know that a magnetic field has to do with the region in space where the influence of a magnet can be felt. In this case, we have been told that;
The magnetic field of the conductor (B)= 0.75 T
The current (I) = 69 A
Length of the wire = 30 cm or 0.3 m
Let us recall the formula that says;
F = BIL
F = force on the conductor
B = magnetic field
L = length of the conductor
Thus if we substitute values;
F = 0.75 * 69 * 0.3
F = 15.5 N
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explain ray of light and beam of light with the help of a diagram each
A ray of light is a segment of light that is moving in a single direction along a straight path. A beam of light is a collection of light rays that emanates from a single source.
A light beam might be parallel, convergent, or divergent. A parallel beam is formed when the beams from a distant light source, such the sun, are perpendicular to one another. In a convergent beam, the rays proceed towards a point. The rays in a divergent beam move away from a point.Light sources can be divided into two categories: Luminescence and Incandescence.A ray of light is the direction or route that light energy follows as it moves through a material. An arrow is drawn on a straight line to indicate it.To know more about light
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You do 13 J of work as you lift a 35-N pail of water. Through what height did you lift the pail?
Height to which the lift of the pail is taken is 0.37m.
Height is the vertical distance of an object from the surface of the Earth.
Work done = 13 J
Weight of the pail of the water = 35-N
Gravity is defined as the force that attracts a body to the Earth or any other physical body that has mass.
The acceleration due to gravity is denoted by 'g' which has the value of 9.81 [tex]m/s^{2}[/tex].Work done by gravity = mghW = mgh
mg = 13 J
W = 35 N
h = [tex]\frac{W}{mg}[/tex]
h = [tex]\frac{13}{35}[/tex]
h = 0.37 m
The height to which the lift of pail will be raised will be 0.37m.
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A car of mass 500 kg is moving at a speed of 1.2m/s. A man pushes the car increasing the speed to 2 m/s. How much work did the man do
Answer:
Work:
A = 640 J
Explanation:
Given:
m = 500 kg
V₁ = 1.2 m/s
V₂ = 2.0 m/s
____________
A - ?
The work is equal to the change in the kinetic energy of the car:
A = Δ Wk
A = m·V₂² / 2 - m·V₁² / 2
A = (m/2)·(V₂² - V₁²)
A = (500/2)·(2² - 1.2²) = 640 J
A bullet of mass 32g is fired from a gun. The graph above shows the variation of the force F on the bullet with time T as it travels along the barrel of the gun.
The bullet is fired at time T=0 and the length of the barrel is 0.70m.
(a) State and explain why it is inappropriate to use the equation S = ut + 1/2 a(t^2) to calculate the acceleration of the bullet.
(b) Use the graph to:
(i) Determine the average acceleration of the bullet during the final 2.0ms of the graph
(ii) show that the change in momentum of the bullet, as the bullet travels along the length of the barrel, is approximately 9Ns.
(c) Use the answer in (b)(ii) to calculate the
(i) speed of the bullet as it leaves the barrel
(ii) average power delivered to the bullet
(d) Use Newton’s third law to explain why a gun will recoil when a bullet is fired
Answer:79g +9a(y>3
Explanation::79g +9a(y>3
Every action has an equal and opposite response, states Newton's Third Law of Motion. When a bullet is fired from a gun, the gun exerts force on the bullet that causes it to move forward. The bullet also applies an equal and opposing force to the gun as it moves backward.
What variation of the force F on the bullet with time?The term “translational motion” refers to a motion in which the body moves in a straight line from one location to another. The motion of a bullet launched from a gun is an illustration of translational motion.As the bullet goes rearward, it exerts an equal and opposite force on the gun.
Therefore, A bullet loses kinetic energy and gains potential energy when fired vertically upward. At greater altitudes, the bullet continues to lose kinetic energy while gaining potential energy.
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If the water start at a height of 45 metered and has a mass of 250 kg what is the potential energy of the water
The potential energy of the water having height of 45 m and has a mass of 250 kg is 110,250 Joule.
The force acting on the two objects affects the potential energy formula. The formula for gravitational force is P.E. = mgh, where g is the acceleration caused by gravity (9.8 m/s2 at the earth's surface) and h is the height in meters.
Substituting the value of mass (m), height(h) and g in the formula of potential energy
P.E = mgh
P.E. = 250*9.8*45
P.E.= 110,250 J
What is potential energy?Potential energy is the power that a thing possesses as a result of where it is in relation to other objects. Because the earth can pull you down through the force of gravity while doing work in the process, being at the top of a stairwell gives you more potential energy than standing at the bottom.
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Motor oil, axle grease, and other lubricants are slippery. Why do you
think people spend the money to put these lubricants in their cars? Answer ASAP
Because there is less resistance, it is simpler to maneuver their vehicle and requires less effort.
How should we define force?The definition of force is physics states that when a mass-containing object is pushed or pulled, it alters its velocity. The ability to change a body's resting and moving state is actually possessed by force, an external agent. It moves and has a certain size.
What role does force play?Things move and, more precisely, change their motion as a result of force. The forces of magnetic forces and gravity are two examples of natural forces that humans have encountered. These two forces don't need to be in close proximity to each other to work because they act at a distance.
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A star has right ascension of 3 hours. Which of these statements is correct about the star?
It is 3 hours north of the celestial equator.
It is 3 hours south of the celestial equator.
It is 3 hours to the east of zero hours right ascension.
It is 3 hours to the west of zero hours right ascension.
The correct statement about the right ascension is "it is 3 hours to the east of zero hours right ascension.
option C is the correct answer
What is right ascension of stars?The right ascension of stars is the astronomical equivalent of longitude.
Right ascension is also the angular distance of the star measured eastward from the first point of Aries, also called the Vernal Equinox.
In other words, the right ascension describes how far a star is displaced from a given point towards the eastward direction along the longitude.
Lines of longitude runs from east to west. But the right ascension runs towards the east.
Thus, the correct statement describing the right ascension would measure it towards the east.
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The mass of the sun is 1.99 x 1030 kg. The distance from the sun to Earth is 6.96 x 108 m.
How fast would you need to travel to escape the gravitational pull of the sun?
Use Newton’s law of universal gravitation.
F = Gm1m2/r^2
(Force) F= Newtons
G is the “Universal Gravitational Constant”. G = 6.67 × 10^-11 N m^2 kg^-2
M1 is the first mass, the Sun. Mass of the Sun = 2 x 10^30 kg
M2 is the second mass, the Earth. Mass of the Earth = 6 x 10^24 kg
DR is the distance between the two objects. Distance from the Earth to the Sun = 1.5 x 10^11 metres
F = Gm1m2/r^2
F = G x 2 x 10^30 x 6 x 10^24/ [1.5 x 10^11] ^2 = 6.7 x 10^11 N
An iron battleship is very heavy. How is it able to float?
URGENTTTTT HELP ME
Referring to the graph in the section header, what was his displacement between 100 and 300 seconds?
Question 2 options:
Question 3 (2 points)
Referring to the graph in the section header, what was the runner's velocity during segment D?
Answer:
V = (S2 - S1) / t = (750 - 500) m / (300 - 100) s = 1.25 m/s
Likewise during segment (D)
V = (0 - 750) m / (500 - 300) s = -3.75 m/s
two vehicle are moving in same direction the first one has velocity of 24m/s another has 18m/s find their relative velocity & also their relative velocity when they are moving in opposite direction
The relative velocity of two vehicles moving in the same direction will be 42 m/s, whereas the relative velocity of two vehicles moving in different directions will be 8 m/s.
Let the velocities of the two vehicles be, v1 and v2, respectively.
Given,
The velocity of the first vehicle (v1) = 24 m/s
The velocity of the second vehicle (v2) = 18 m/s
Case-1
When they are moving in a same direction,
The relative velocity (V) of the two vehicles will be the sum of their velocities, i.e.,
V = v1 + v2
=> V = 24 + 18
=> V = 42 m/s.
Case-2
When the vehicles are moving in different directions,
The relative velocity (V) of the two vehicles will be the difference between the velocities, i.e.,
V = v1 - v2
=> V = 24 - 18
=> V = 6 m/s.
Therefore, The relative velocity of two vehicles moving in the same direction will be 42 m/s, whereas the relative velocity of two vehicles moving in different directions will be 8 m/s.
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I'm stuck on b(i), because I don't understand what equation to use with what values.
Answer:
Apparently, it takes 3 * 5E-3 sec to travel from D to G
The distance is given as .68 m
V = S / t = .68 m / (3 * 5E-3 s) = 45 m/s
The diagram shows object N placed one on top of object M. M has a mass of 4 kg and N has a mass of 2 kg. Assume that all the contact surfaces are frictionless, what is the acceleration of N when M is
pulled by a force of 20 N?
A. 0 m/s²
B. 4 m/s²
C. 3.3 m/s²
D. 10 m/s²
If N placed one of these on top of item M, the acceleration when M is dragged by a force od 20 N is 10 m/s. N weighs 2 kg, but M is 4 kg in weight.
The correct answer is D
What happens during acceleration?Acceleration is the rate at which the direction and speed of a moving object change over time. Anything is said to be accelerated when it goes straighter and faster or slower. Therefore, even though the speed is constant, travel on a circle increases due to the constant change in direction.
Is a gradual incline good?Slow acceleration can be dangerous as well as unpleasant, especially when entering a busy state road when you must accelerate rapidly to avoid being rear-ended. When you are moving slowly up a slope while driving, acceleration can sometimes be a hassle.
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what is the conclusion of a simple pendulum experiment
The surprising conclusion - the pendulum traverses a longer distance in a shorter time, than in a shorter distance, and its period is shorter.
The term "force" has a specific meaning in science. At this level, it is quite acceptable to refer to a force as a push or a pull. A force is not something that an object 'has in it.' Another object applies a force to another. The concept of a force is not limited to living or nonliving things.
The goal of this experiment is to quantify gravity's acceleration using a physical pendulum. A basic pendulum is described as a point mass connected to a massless unstretchable string connected to a rigid support. Mechanical energy is conserved in a simple pendulum with no friction. Total mechanical energy is the sum of kinetic and gravitational potential energy. There is a continual interchange of kinetic energy and gravitational potential energy as the pendulum swings back and forth.
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Bill throws a 10.0-g ball straight down from a height of 2.0m. The ball strikes the floor at a
speed of 7.5 m/s. What was the initial speed of the ball?
The initial speed of the ball is 4.12 m/s.
What is speed?Speed is distance travelled by the object per unit time. Due to having no direction and only having magnitude, speed is a scalar quantity With SI unit meter/second.
Given parameters:
Mass of the ball; M = 10.0 g.
Height from where ball straight down from : h = 2.0 m.
Final speed of ball; v = 7.5 m/s.
And we known that, acceleration due to gravity; g = 9.8 m/s²
We have to find: the initial speed of the ball: u = ?
We know that, v² = u² + 2gh
⇒ u² = v² - 2gh
⇒ u² =( 7.5)² - 2×9.8 ×2
⇒ u² = 17.05
⇒ u = 4.12 m/s.
Hence, the initial speed of the ball is 4.12 m/s.
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An object with a mass of 7 kg accelerates 8 m/s2 when an unknown force is applied to it. What is the amount of the force?
The amount of force applied to the 7kg object that caused it to accelerate at 8m/s² is 56 newtons.
What is the force applied to the object?A force is simply a push or a pull of an object resulting from the object's interaction with another object.
From newton's second law;
Force = mass × acceleration
Given the data in the question;
Mass of the object = 7kgAcceleration = 8m/s²Applied force = ?Plug the given values into the formula to determine the applied force.
Force = mass × acceleration
Force = 7kg × 8m/s²
Force = 56kgm/s²
Force = 56 N
Therefore, the applied force is 56 newtons.
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How much force in Newtons is required to accelerate a 5 kg bowling ball at 2 m/s²?
O 3 N
O 7 N
O 10 N
O 2.5 N⁰
Part A
Calculate the maximum increase in photon wavelength that can occur during Compton scattering.
Express your answer to three significant figures and include the appropriate units.
AA max = 4.85x10-12 m
What is the energy of the smallest-energy X-ray photon for which Compton scattering could result in doubling the original wavelength?
Express your answer in megaelectronvolts to three significant figures.
The electron receives some of the energy that belongs to the photon. If an object's energy declines, its frequency and wavelength get longer.
What is Compton effect?When a photon with energy hf collides with an electron that is stationary, compelling proof that light is composed of particles (photons) and that photons have momentum is produced. Although the electron receives a portion of the energy and momentum (the Compton effect), the energy and momentum are conserved in this elastic collision. The photon possesses hf/ energy following the collision, while the electron has K kinetic energy.
Energy is conserved as follows: hf = hf/ + K
Combining this with the momentum conservation formulae, the following equation may be used to demonstrate the relationship between the wavelengths of the incident and emitted photons:
Δλ = λ/ - λ = (h/mec) (1 - cosθ)
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Which factor will not affect the strength of a solenoid?
Question 2 options:
number of wraps
strength of current
color of the wire
adding an iron core
The color of the wire is a factor that will not affect the magnetic strength of a solenoid.
What is a solenoid?A solenoid is a device that consists of a coil made of wire, a housing and a moveable armature. When an electrical current is flowing in the solenoid, a magnetic field forms around the coil which draws the plunger inside. A solenoid has the ability to convert electrical energy in the form of mechanical work.
The magnetic field created by a solenoid depends on the current and density of rounds. The energy density of the magnetic field depends on the strength of the magnetic field and also depends upon the magnetic permeability of the material present in it. Iron has a larger permeability as compared to a vacuum.
So we can conclude that option C is the correct answer.
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You hold a 0.125 kg glider A and a 0.500 kg glider B at rest on an air track with a compressed spring of negligible mass between them. When you release the gliders, the spring pushes them apart so that they move in opposite directions. When glider A has moved 0.960 m to the left from its starting position, how far to the right from its starting position has glider B moved?
A crowbar of 200 cm long is pivoted about to its other end to displace a load of 600 N. 0.5 m Calculate MA, VR and efficiency of the crowbar.
The mechanical advantage of the crow bar is 3 while the velocity ratio is 4. The efficiency of the machine is 75%.
What is the efficiency of the crow bar?We know that a machine is any device that can be used to make work a lot much easier. Thus, the machine is the object that could make less effort to be applied in making a greater work to be done as we can see in this case we have here.
From the question, the pieces of information that we can get are;
Distance moved by Effort = 200 cm
Distance moved by load = 0.5 m or 50 cm
Velocity ratio = Distance moved by Effort/Distance moved by load
= 200 cm /50 cm
= 4
Mechanical advantage is found to be; Load/Effort
= 600 N/200 N
= 3
Efficiency = Mechanical advantage/ Velocity ratio * 100/1
= 6/4 * 100/1
=3/4 * 100/1
= 75%
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What is a statement of relation between objects?
O Rule
O Concept
O Image
O Symbol
A statement of relation between objects is called as Concept.
How do you define a concept?
Concepts are regarded as intangible ideas. They are acknowledged as the basic conceptual building blocks of principles, thoughts, and beliefs.
They are critical to all facets of cognition. As a result, concepts are investigated by a variety of academic fields, including linguistics, psychology, and philosophy. These fields are curious about the logical and psychological structure of concepts as well as how they are combined to create thoughts and sentences.
An increasingly popular interdisciplinary approach known as cognitive science has made the study of concepts a focal point.
There are currently at least three popular approaches to understanding a concept:
Representations of ideas in the mind, where ideas are things that exist in the mind (mental objects). Concepts as abilities, where concepts are unique cognitive agent abilities (mental states)Concepts as Fregean senses—abstract things in contrast to mental objects and mental states.To learn more about concept from the given link
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A 15 kg dog running at 4 m/s picks up a 1 kg stationary bone and continues to run what is the speed of the dog as it runs with its newfound treasure?
0
2.5
3.75
5.83
A bouncy ball has 30 J of kinetic energy before it collides with the floor. If the collision is perfectly elastic, what is the kinetic energy of the bouncy ball after it collides with the floor?
0
30
65
200
Answer: (1) C, (2) B
Explanation: I took the test, but to solve question 1 use the inelastic collision formula m1v1+m2v2 = (m1+m2)v2 to get the answer. Question 2 is b because it states that the ball is perfectly elastic as it collides with the floor. A perfectly elastic collision is when objects collide and no net energy is lost, hence the bouncy ball still has 30 J worth of kinetic energy.
The speed of the dog as it runs with its newfound treasure is 3.75 m/sec.
The kinetic energy of the bouncy ball after it collides with floor is 30 J.
What is speed?The speed of an object is the magnitude of the change of its position over time or the magnitude of the change of its position per unit of time; it is thus a scalar quantity.
According to the given in question,
a.) Using inelastic collision formula
[tex]m_1v_1+m_2v_2 = (m_1+m_2)v_2[/tex]
[tex]v_2[/tex] = 60/16 m/sec = 3.75 m/sec
b.) Because it states that the ball is perfectly elastic as it collides with the floor. A perfectly elastic collision is when objects collide and no net energy is lost, hence the bouncy ball still has 30 J worth of kinetic energy.
The speed of the dog as it runs with its newfound treasure is 3.75 m/sec.
The kinetic energy of the bouncy ball after it collides with floor is 30 J.
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1.- A car travels 10.0 km due north, then 8.00 km due east in 30.0 minutes. Find the
car's
Distance.
Displacement (indicate the angle too)
Average speed
Average velocity
(a)The displacement of the car is 12.8m
(b)The average speed is 10.0 m/s.
(c)The average velocity is 7.11 m/s.
What is displacement and distance?Distance is the real distance an object has traveled. The shortest distance between an object's initial and final positions is called displacement. It has a scalar value. A vector quantity, that is. An body can never travel a distance of zero.
Briefing:a. The vector sum of the different displacements yields the overall displacement. The Pythagorean theorem provides the vector sum since these displacements are perpendicular.
x2 = (10.0 km)² + (8.00 km)²
x = 12.8 km.
The angle is found using
tan q = (10.0 km/8.00 km)
q = 51.3° N of E.
b. Avg. Speed = Distance/Time = (18.0 km/30.0 min)(1000 m/1 km)(1 min/60 s) = 10.0 m/s.
c. Avg. Velocity = Displacement/Time = (12.8 km/30.0 min)(1000 m/1 km)(1 min/60 s) = 7.11 m/s.
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The complete question is -
A car travels 10.0 km due north, then 8.00 km due east, the total trip taking 30.0 minutes. Find (a) the displacement of the car, (b) the average speed (in m/s), and (c) the average velocity (in m/s).
Think about a demonstration with a deflated and inflated basketball. The basketball weighed more after it was inflated with air than when it was deflated. How does this show that gas is matter?
When basketball is inflated than there is more air resistance so weight that is force due to gravity is more.
What is force?A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.
Deflated and inflated ball are with air and without air so mass varies hence we say it is matter as it occupies space inside the ball.
When basketball is inflated than there is more air resistance so weight that is force due to gravity is more.
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