To determine which object has higher kinetic energy, we can use the formula for kinetic energy, which is given by:
Kinetic energy = 1/2 * mass * velocity^2
For the first object with a mass of 5 kg and a speed of 10 m/s:
Kinetic energy = 1/2 * 5 kg * (10 m/s)^2 = 250 Joules
For the second object with a mass of 10 kg and a speed of 5 m/s:
Kinetic energy = 1/2 * 10 kg * (5 m/s)^2 = 125 Joules
Therefore, the 5 kg object has higher kinetic energy.
As shown below, an object with a mass of 5 kg is moving at a speed of 10 m/s. Another object with a mass of 10 kg is moving at a speed of 5 m/s. Which of the objects has higher kinetic energy? (1 point)
The 10 kg object has higher kinetic energy.
The objects have equal kinetic energy.
Both objects have zero kinetic energy.
The 5 kg object has higher kinetic energy.
7 answers
A light is connected to a battery as shown below. What type of energy transfer occurs? (1 point)
Chemical energy to mechanical energy to light energy
Electrical energy to mechanical energy to light energy
Mechanical energy to electrical energy to light energy
Chemical energy to electrical energy to light energy
Chemical energy to mechanical energy to light energy
Electrical energy to mechanical energy to light energy
Mechanical energy to electrical energy to light energy
Chemical energy to electrical energy to light energy
The correct answer is:
Chemical energy to electrical energy to light energy
Chemical energy to electrical energy to light energy
When a match is struck, what forms of energy does the burning match give off?(1 point)
Thermal energy and solar energy
Nuclear energy and light energy
Light energy and thermal energy
Solar energy and nuclear energy
Thermal energy and solar energy
Nuclear energy and light energy
Light energy and thermal energy
Solar energy and nuclear energy
The correct answer is:
Light energy and thermal energy.
When a match is struck, the friction between the match head and the striking surface causes the match head to reach a temperature high enough to ignite the chemicals present. As the match burns, it releases light energy in the form of a flame and heat energy in the form of thermal energy.
Light energy and thermal energy.
When a match is struck, the friction between the match head and the striking surface causes the match head to reach a temperature high enough to ignite the chemicals present. As the match burns, it releases light energy in the form of a flame and heat energy in the form of thermal energy.
When you add cold milk and hot chocolate, they will slowly blend as the cooler liquid mixes with the warmer liquid. Eventually, the heat will be spread out evenly through the entire liquid. Which statement best explains why this happens?(1 point)
Heat always moves from areas of higher temperature to areas of lower temperature.
Cold liquids rise and hot liquids sink making the liquids mix.
The molecules of the two liquids form chemical bonds to spread energy.
The liquids attract each other because the densities of the liquids are the same.
Heat always moves from areas of higher temperature to areas of lower temperature.
Cold liquids rise and hot liquids sink making the liquids mix.
The molecules of the two liquids form chemical bonds to spread energy.
The liquids attract each other because the densities of the liquids are the same.
The correct answer is:
Heat always moves from areas of higher temperature to areas of lower temperature.
This process occurs because heat naturally flows from regions of higher temperature to regions of lower temperature. When the cold milk is added to the hot chocolate, the heat energy from the hot chocolate begins to transfer to the cold milk, raising the temperature of the milk and lowering the temperature of the hot chocolate. As the heat continues to transfer, the temperature difference between the two liquids decreases over time until they reach a uniform temperature. This gradual mixing and heat transfer is a result of the principle that heat flows from areas of higher temperature to areas of lower temperature.
Heat always moves from areas of higher temperature to areas of lower temperature.
This process occurs because heat naturally flows from regions of higher temperature to regions of lower temperature. When the cold milk is added to the hot chocolate, the heat energy from the hot chocolate begins to transfer to the cold milk, raising the temperature of the milk and lowering the temperature of the hot chocolate. As the heat continues to transfer, the temperature difference between the two liquids decreases over time until they reach a uniform temperature. This gradual mixing and heat transfer is a result of the principle that heat flows from areas of higher temperature to areas of lower temperature.