The thermal energy gained when the temperature of 800g of iron is raised by 120 degrees C is 42,240 J.
Explanation:To calculate the thermal energy gained when the temperature of 800g of iron is raised by 120 degrees C, we can use the equation:
Q = m * c * ΔT
Where:
Q is the thermal energy gainedm is the mass of the iron (in kg)c is the specific heat capacity of iron (in J/kg·K)ΔT is the change in temperature (in K)Plugging in the given values:
Q = (0.8 kg) * (440 J/kg·K) * (120 K) = 42,240 J
Therefore, the thermal energy gained when the temperature of 800g of iron is raised by 120 degrees C is 42,240 J.
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Describe what happens when you fire a gun from the perspective of Newton's 3rd Law.
Answer: When you fire a gun from the perspective of newton's third law there is an equal and opposite reaction. This is what makes the bullet go forward and the gun kick back.
Explanation: when you fire a gun you pull the trigger, after you pull the trigger a mechanism in the gun goes forward very quickly to strike the primer on the bullet. The bullet will propel forward causing the gun to go backward into your shoulder.
At the point when you discharge a gun, Newton's third Law of Motion, which expresses that for each activity, there is an equivalent and inverse response.
As per Newton's third Regulation, when the shot is discharged from the weapon, the firearm applies a forward force on the slug, moving it out of the barrel at rapid. At the same time, the slug applies an equivalent and inverse power on the firearm. The gun recoils backward due to the opposing force. The size of the power applied by the slug on the firearm is equivalent to the power applied by the weapon on the projectile, however the impacts are different because of the huge contrast in mass between the shot and the weapon. The projectile, being a lot lighter, speeds up quickly forward, while the heavier firearm goes in reverse with a much lower speed increase. The person firing the gun can feel this recoil, which is a direct result of Newton's third law of motion.Which diagram best represents the relationship between the Earth and Sun that causes the changes in seasons on Earth?
Answer: third diagram
Explanation:
Sort the processes based on the type of energy transfer they involve.??
Explanation:
Thermal energy is defined as the kinetic energy present within the particles of a substance.
A process in which energy is absorbed by the molecules of a substance is known as endothermic process. On the other hand, a process in which energy is released by the molecules of a substance is known as exothermic process.
Condensation : A process in which vapors change into liquid as bonds are formed and energy is released.
Freezing : A process in which liquid changes into solid as bonds are formed and energy is released.
Deposition : A process in which particles of a substance come closer to each other resulting in bond formation and release of energy.
Sublimation : A process in which solid state directly changes into gaseous state without undergoing liquid state is known as sublimation. In this process, bonds break and energy is absorbed by the solid particles.
Evaporation : A process in which liquid changes into gas as energy is absorbed leading to breakage bond.
Melting : A process in which solid changes into liquid as energy is absorbed leading to breakage bond.
Thus, we can conclude that given processes are sorted as follows.
Thermal energy added : Sublimation, evaporation, and melting.Thermal energy released : condensation, freezing and deposition.As ocean waves get closer to the shore they slow down. This slowing causes them to bend and come in close to parallel with the shore. This is because shallow water and deep water can be thought of as two different media. This bending of a wave is the wave interaction known as
A) diffraction
B) interference
C) reflection
D) refraction
The correct answer is D) refraction! Hope this helps!
Answer:
i think it is D, hope this helps
Once the magma found at location "E" cools and crystalizes, it will
Answer:turn into stone. this will cause erosion for magma to turn to stone
Explanation:
A computer draws a current of 10 amperes when plugged into a 220 volt socket. How much power does the computer have?
The power consumed by the computer is calculated using the formula for electric power, P = I X V. In this case, the power is 2200 watts.
To calculate the power consumed by the computer when it draws a current of 10 amperes and is plugged into a 220-volt socket, we use the formula for electric power (P), which is the product of current (I) and voltage (V). Therefore, we calculate the power as
P = I X V
P = 10 A X 220 V
P = 2200 W (watts) or 2.2 kW.
According to the scientific definition of work, which of these best shows that work is being done
The best statement that represents the work is being done is A car being towed down a street.
What is work?The meaning of the work in terms of physics should represent the measurement of the energy transfer that arises at the time when the object should be moved over the distance via the external force also it should be applied at the displacement direction.
Therefore, The best statement that represents the work is being done is A car being towed down a street.
This question is incomplete. Please find the options below.
f A lamp hanging from a ceiling
g A rocket drifting through space
h A man pushing against a concrete wall
j A car being towed down a street
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Final answer:
Scientific work requires a force to cause an object's displacement in the direction of the force, and is calculated by the equation W = Fd cos θ. No work is done if there is no displacement or the force is perpendicular to the direction of displacement.
Explanation:
The scientific definition of work differs from everyday use. In physics, work requires that a force causes a displacement of an object, and the force must have a component in the direction of the displacement. This process implies a transfer of energy. To calculate work done (W) scientifically, you use the equation W = Fd cos θ, where F is the magnitude of the force applied, d is the displacement of the object, and θ is the angle between the force vector and the displacement vector. When there's no displacement or the force is perpendicular to the displacement, no work is done according to science.
For example, pushing against a wall would not be considered work in the scientific sense because the wall does not move—there's no displacement. However, lifting an object off the ground does constitute work as the direction of the force (upwards) is the same as the direction of the movement (also upwards), and the object is displaced from its initial position.
Archimedes is supposed to have said, "Give me a place to stand on, and I will move the Earth." Suppose you had an object with a mass equal to that of Earth (5.98 1024 kg), and it experienced gravity equal to that at Earth's surface, so that its weight was 5.87 1025 N. If by using a lever you could move this mass with a force of 175 N, what would be the mechanical advantage of the lever?
a 45kg boy is holding a 12kg pumpkin while standing on ice skates on a smooth frozen pond. the boy tosses the pumpkin with a horizontal speed of 2.8 m/s to the right towards a 37 kg girl who catches it. the girl is also on ice skates. what are the final speeds of the boy and the girl?
Final answer:
Using the conservation of momentum, the final speed of the boy after throwing the pumpkin is 0.7467 m/s to the left, and the final speed of the girl after catching the pumpkin is 0.6857 m/s to the right.
Explanation:
The problem you're trying to solve involves the conservation of momentum, because momentum is conserved when objects interact in a closed system without external forces, such as the scene described with skaters on ice. To find the final speeds of the boy and the girl, we'll use the principle of conservation of linear momentum. Since initially they are both at rest and the boy throws the pumpkin, the final momentum of the system must be zero.
Using the equation for conservation of momentum: momentum before the throw = momentum after the throw. Initially, both the boy and the pumpkin are stationary, so their initial combined momentum is 0. After the boy throws the pumpkin, he will move in the opposite direction to conserve momentum.
Momentum of the boy after the throw: m_boy × v_boy = 0 - (mass of pumpkin × velocity of pumpkin)
Momentum of the girl after catching the pumpkin: m_girl + mass of pumpkin × v_girl = mass of pumpkin × velocity of pumpkin
m_boy = 45kg (mass of the boy)
m_pumpkin = 12kg (mass of the pumpkin)
v_pumpkin_initial = 2.8 m/s (speed of the pumpkin)
Let's calculate the speed of the boy after he throws the pumpkin:
45kg × v_boy = 0 - (12kg × 2.8 m/s)
v_boy = (-33.6 kg×m/s) / 45kg
v_boy = -0.7467 m/s
The negative sign indicates that the boy is moving in the opposite direction to the pumpkin's initial movement. Now, let's find the speed of the girl after catching the pumpkin:
(37kg + 12kg) × v_girl = 12kg × 2.8 m/s
49kg × v_girl = 33.6 kg×m/s
v_girl = 0.6857 m/s
The boy's final speed is 0.7467 m/s to the left, and the girl's final speed is 0.6857 m/s to the right.
If stretching is done during the cool-down, it can help the muscle _____.
which statement best compares potential and kinetic energy
Answer:
Potential energy is the energy possessed by a body at rest while kinetic energy is the energy possessed by a body in motion.
Explanation:
Potential energy is the energy possessed by a body by virtue of its position while kinetic energy is the energy possessed by a body by virtue of its motion. Potential energy is the energy acting on a body at rest(not moving) while kinetic energy is the energy acting on moving object(motion).
Example of potential energy is the energy possessed by a parked car. The parked car is not moving i.e the car is in a state of rest
Example of kinetic energy is the energy possessed by an accelerating car. The car is in motion (moving).
what is the name given to the force exerted by the first object on a second object
The force exerted by the first object on a second object is known as the action force, a part of Newton's Third Law of Motion, which states that equal and opposite forces are exerted on both objects involved in an interaction.
The name given to the force exerted by the first object on a second object is generally referred to as the "action" force. This is a part of Newton's Third Law of Motion, which states that for every action, there is an equal and opposite reaction. This law means that whenever one body exerts a force on a second body, the second body simultaneously exerts a force that is equal in strength and opposite in direction to that of the first body.
This concept is significant because it underlines the symmetry of forces in nature. When object A exerts a force on object B, object B exerts a force back on object A. These forces are equal in magnitude but opposite in direction, reflecting Newton's Third Law which is often informally referred to as the law of action and reaction.
The Galilean moons are satellites of which planet?
The three forces acting on a hot-air balloon that is moving vertically are its weight, the force due to air resistance and the upthrust force. The hot-air balloon descends vertically at constant speed. The force of air resistance on the balloon is F. Which weight of material must be released from the balloon so that it ascends vertically at the same constant speed? A F B 2F C 3F D 4F
Explanation :
The forces acting on hot- air balloon are:
Weight, (W)
Force due to air resistance, (F)
Upthrust force, (U)
Its weight W is acting in downward direction. The upthrust force U acts in upward direction. When the balloon is moving upward, the air resistance is in downward and vice versa.
In this case, the hot-air balloon descends vertically at constant speed.
so, [tex]a=0[/tex]
and [tex]F=ma=0[/tex]
so, [tex]W = F + U[/tex] ....................(1)
when it is ascending let the weight that it is releasing is R, so
[tex](W-R) + F = U[/tex]..........(2)
solving equation (1) and (2)
[tex](W-R)+F=W-F[/tex]
[tex]R=2F[/tex]
2F is the weight of material that must be released from the balloon so that it ascends vertically at the same constant speed.
Answer: (B) .2 F
Explanation :
The weight is always downward and it is a constant.
The upthrust fore U acts upward and it has always same value as it depend on the difference in height between the top and bottom surface of the air balloon.
The direction of the force due to air resistance depends on the motion and air resistance always opposite motion. air resistance downwards that means the air balloon will ascending and air balloon will descending then air resistance is upwards.
So, air resistance depends on speed .
When air balloon descending at constant speed
Air resistance = F
A constant speed means acceleration is zero that means the resultant force is zero.
W = F + U.....(I)
When air balloon ascending
air resistance = F downwards
Some weight of the material needs to be released for the resultant force to be zero.
Suppose, the weight to be released be R.
(W - R) + F = U......(II)
From equation (I)
U = W- F....(III)
The upthrust force has same value throughout the motion.
Now, put the value of U in equation (I)
W - R + F = W - F
-R = - F - F
R = 2 F
Hence, this is the required solution.
what SD can friction do to moving objects
The illustration shows a light ray striking an object.
In the illustration, the light ray striking the object is-
A.refracted
B.stopped
C.absorbed
D.reflected
The illustration represents that the light ray striking the object is reflected. Hence, option (D) is correct.
The given problem is clear explanation for the reflection of light rays. The phenomena by which the rays of light strikes a surface bounce back exactly from the surface by making some angle with respect to normal, is known as reflection of light ray.
In the given figure, we can clearly observe that the light ray is striking the vertical surface somewhere from the bottom, which is known as incident ray. When this ray strikes the surface it bounce back from the surface and we can observe the upward arrow to represent the reflected ray of light.
Thus, we can conclude that the illustration represents that the light ray striking the object is reflected. Hence, option (D) is correct.
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Can you help me with question one?
What evidence supports the law of conservation of energy?
Answer:
Light energy is absorbed by plants and converted to chemical energy.
Explanation:
what is the speed of a wave that has a frequency of 8,500 Hz and a wavelength of 1.5 m?
The speed of a wave with a frequency of 8,500 Hz and a wavelength of 1.5 m is calculated as 12,750 m/s by multiplying the frequency and wavelength together.
Explanation:To calculate the speed of a wave, we can use the formula v = f × λ, where v is the speed of the wave, f is the frequency, and λ (lambda) is the wavelength. Given that the frequency, f, is 8,500 Hz and the wavelength, λ, is 1.5 m, you can plug these values into the equation to determine the wave's speed.
Speed of the wave v = 8,500 Hz × 1.5 m = 12,750 m/s
So, the speed of the wave with a frequency of 8,500 Hz and a wavelength of 1.5 m is 12,750 meters per second (m/s).
¿como se clasifican las leyes que intervienen en la ocurrencia de los fenomenos fisicos?
Compare and contrast an electric discharge with an electric current
Match these items
. 1. first nuclear reactor Fermi 2. atomic mass 3. splitting of nuclei into lighter elements neutron 4. number of neutrons and protons Becquerel 5. builds heavier elements fission 6. discovered radioactivity curie 7. unit of radiation fusion
Answer:
Answer:
1. Fermi
2. Neutron
3. Fission
4. Atomic mass
5. Fusion
6. Becquerel
7. Curie
Explanation:
What type of barometric readings would you expect if you brought your barometer to the top of a mountain?
Please help!
How can you separate a mixture of 10 grams of salt and 10 grams of sand?
We have that we use dissolving, filtration and distillation to separate sand from salt
Dissolving,Filtration DistillationSand can be separated adding water to the mixture upon dissolving we filter to get the salt solution out of the sand
Then we distill by boil salt solutions at vaporization temperature of water to get salt back the water and salt solution to get salt back
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How much data can a digital wave send. (The maximum data)
Why does an ice cube melt when you hold it in your hand? Question 1 options: Heat from the ice cube is transferred to your hand. The ice cube radiates heat to your hand. Your hand transfers temperature to the ice cube. Heat is transferred from your hand to the ice cube.
compare and contrast sound waves and light waves . include the physical properties and various behaviors each wave exhibits including those are similar and different
sound waves and light waves are both types of waves that exhibit similar behaviors such as reflection, refraction, and interference. However, they differ in their physical properties such as the medium they travel through, their speed, and their frequency.
What is the difference between a sound wave and a light wave?Sound waves and light waves are both types of waves that propagate through a medium, but they have several differences in their physical properties and behaviors.
Physical Properties:
1. Medium: Sound waves require a medium to travel through, such as air, water, or solids. Light waves, on the other hand, can travel through a vacuum and do not require a medium.
2. Speed: Sound waves travel at a slower speed than light waves. The speed of sound waves depends on the density and compressibility of the medium through which they are traveling. In contrast, the speed of light waves is constant in a vacuum and is one of the fundamental constants of nature.
3. Frequency: Sound waves have lower frequencies than light waves. The frequency of a sound wave is the number of cycles per second, measured in hertz (Hz). Light waves have much higher frequencies, typically measured in terahertz (THz).
Behaviors:
1. Reflection: Both sound waves and light waves can reflect off surfaces. When a sound wave reflects off a surface, it changes direction, and the angle of incidence is equal to the angle of reflection. When a light wave reflects off a surface, it undergoes a change in direction and can be either specular (like a mirror) or diffuse (like a matte surface).
2. Refraction: Both sound waves and light waves can be refracted or bent when they pass through a medium with a different density. When a sound wave is refracted, it changes direction and speed, while when a light wave is refracted, it can change direction, speed, and wavelength.
3. Interference: Both sound waves and light waves can exhibit interference when two or more waves combine to form a resultant wave. In sound waves, interference can be constructive, where the amplitudes of the waves add together, or destructive, where the amplitudes cancel each other out. In light waves, interference can be either constructive, where the waves add together to create bright fringes, or destructive, where the waves cancel each other out to create dark fringes.
Therefore, sound waves and light waves are both types of waves that exhibit similar behaviors such as reflection, refraction, and interference. However, they differ in their physical properties such as the medium they travel through, their speed, and their frequency.
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A construction worker pushes a wheelbarrow with a total mass of 50.0kg. What is the acceleration of the wheelbarrow if the net force on it is 75 N West?
The acceleration of a 50.0 kg wheelbarrow pushed with a net force of 75 N west is calculated using Newton's second law of motion to be 1.5 m/s² west.
To calculate the acceleration of a wheelbarrow with a mass of 50.0 kg being pushed with a net force of 75 N west, we can use Newton's second law of motion. This law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass, which can be represented by the formula a = F/m, where a is acceleration, F is force, and m is mass.
Given a net force of 75 N west and a mass of 50.0 kg, the acceleration can be calculated as follows:
a = F/ma = 75 N / 50.0 kga = 1.5 m/s² westTherefore, the acceleration of the wheelbarrow is 1.5 meters per second squared in the westward direction.
Currently, new regulations control the use of pesticides and chemical fertilizers to reduce what? A. Water contamination B. Insect population C. Crop sizes D. Illness
its A. water contamination
Over use of pesticides and fertilizers results in contamination of water and air as well as they cause severe health issues when exposed to them. Currently, regulations are controlling the use of these chemicals to reduce water contamination.
What are pesticides?Pesticides are chemical compounds used to kill pests. It is important to control the population of pests and insects which badly affects the crops. However pesticides cannot be used in over dosage it will affect the living.
Fertilizers are used to fertilize the soil to help for the growth of crops. They also contains toxic chemicals.
Both fertilizers and pesticides contains hazardous and toxic chemicals. They chemicals definitely will result in pollution of water and air and causes healthy issues for surrounding organisms.
Water contamination is a serious issues that we are all addressing for long while. Reducing the use of pesticide and fertilizers can decline water pollution up to an extend. Hence, option A is correct.
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A body has translatory motion if it moves along a