Question

What is kinetic energy?

Answer 1

energy of motion

Answer 2

Kinetic and Thermal Energy Quick Check

2 of 52 of 5 Items
Question
A fisherman in a boat is drinking a cup of hot coffee. The large lake below his boat is full of cold water. Which statement is an accurate comparison of the lake water and the coffee?(1 point)
Responses

The lake will have more total thermal energy, but the particles in the coffee will be moving faster.
The lake will have more total thermal energy, and the particles in the lake water will be moving faster.
The coffee will have more total thermal energy, but the particles in the lake water will be moving faster.
The coffee will have more total thermal energy, and the particles in the coffee will be moving faster.

Answer 3

A fisherman in a boat is drinking a cup of hot coffee. The large lake below his boat is full of cold water. Which statement is an accurate comparison of the lake water and the coffee?

The lake will have more total thermal energy, but the particles in the coffee will be moving faster.
The lake will have more total thermal energy, and the particles in the lake water will be moving faster.
The coffee will have more total thermal energy, but the particles in the lake water will be moving faster.
The coffee will have more total thermal energy, and the particles in the coffee will be moving faster.

Answer 4

The gallium in the image is melting in the person’s hand. Which changes will occur on a microscopic level?

The gallium atoms will increase in temperature.
The gallium atoms will gain kinetic energy.
The gallium atoms will be moving faster on average.
The gallium atoms will gain potential energy, moving freely from each other.

Answer 5

Which object will have particles with the highest average kinetic energy?

water at 37°C in a glass
a drop of water at 90°C
an iceberg at 0°C
water at 40°C in a swimming pool

Answer 6

Which object will have particles with the highest average kinetic energy?(1 point)

Responses

A. water at 37°C in a glass
B. a drop of water at 90°C
C. an iceberg at 0°C
D. water at 40°C in a swimming pool

Answer 7

[AI-generated answer — Explain Bot]

Kinetic energy is the energy possessed by an object due to its motion. To understand what it is, we can break it down into its components: "kinetic" refers to motion, and "energy" refers to the ability to do work.

To calculate the kinetic energy of an object, you need two pieces of information: the mass of the object and its velocity. The formula for calculating kinetic energy is:

Kinetic Energy = (1/2) * mass * velocity^2

Here's how you can break it down:

1. Determine the mass of the object: Mass refers to the amount of matter present in the object. It is usually measured in kilograms (kg). You can find the mass of an object either by directly measuring it or by referring to its given value.

2. Determine the velocity of the object: Velocity refers to the speed and direction of the object's motion. It is usually measured in meters per second (m/s). You can measure the velocity of an object using various methods, such as using a speedometer, radar gun, or motion sensors. If the object's speed is constant, you can also calculate velocity by dividing the change in position by the time taken.

3. Square the velocity: Multiply the velocity by itself to get the value of velocity squared (velocity^2).

4. Multiply mass and velocity^2: Multiply the mass (in kg) by the squared velocity (in m/s^2).

5. Multiply the result by (1/2): Multiply the product of mass and velocity^2 by 0.5 or (1/2). This step accounts for the factor of 0.5 in the formula.

The resulting value is the kinetic energy of the object, measured in joules (J).