Use the image to answer the question. A wildlife keeper is trying to catch an escaping rabbit. Who has the greater kinetic energy, the rabbit or the wildlife keeper? (1 point) Responses The wildlife keeper because they speed up and catch the rabbit. The wildlife keeper because they speed up and catch the rabbit. The wildlife keeper because they have a greater mass. The wildlife keeper because they have a greater mass. Neither one because they are moving at the same speed. Neither one because they are moving at the same speed. The rabbit because it has less mass. The rabbit because it has less mass. Skip to navigation

Answer 1

The correct response is: The wildlife keeper because they have a greater mass.

Kinetic energy is calculated using the formula \( KE = \frac{1}{2}mv^2 \), where \( m \) is mass and \( v \) is velocity. If both the rabbit and the wildlife keeper are moving at the same speed, the wildlife keeper, having a greater mass, will have greater kinetic energy.

Answer 2

A skydiver jumps out of a plane and begins to accelerate. His speed increases to 20 m/s, then 30 m/s. His acceleration slows until he reaches a constant speed of 50 m/s. Which statement accurately describes his kinetic energy while falling?(1 point) Responses His kinetic energy would remain the same for the whole fall as long as he lost no mass. His kinetic energy would remain the same for the whole fall as long as he lost no mass. His kinetic energy increased while his speed increases, then it became constant. His kinetic energy increased while his speed increases, then it became constant. His kinetic energy was positive at first, but it decreased to zero when he stopped accelerating. His kinetic energy was positive at first, but it decreased to zero when he stopped accelerating. His kinetic energy increased quickly at first, then it increased at a constant rate. His kinetic energy increased quickly at first, then it increased at a constant rate.

Answer 3

The correct response is: His kinetic energy increased while his speed increases, then it became constant.

As the skydiver accelerates and his speed increases from 20 m/s to 30 m/s and then continues to fall at a constant speed of 50 m/s, his kinetic energy increases during the acceleration phase. Once he reaches a constant speed, his kinetic energy remains constant as long as his mass does not change.

Answer 4

What does the atomic number tell us about an atom? * 1 point The atomic number tells us how many protons and neutrons are in a neutral atom or element The atomic number tells us how many protons and electrons are in a neutral atom or element The atomic number tells us the mass of the atom or element

Answer 5

The correct response is: The atomic number tells us how many protons and electrons are in a neutral atom or element.

In a neutral atom, the number of protons is equal to the number of electrons, and the atomic number represents the number of protons in the nucleus of the atom. Neutrons are not indicated by the atomic number; their quantity can vary in isotopes of the same element.

Answer 6

How many electrons can be in the FIRST energy level of any atom or element?
*
1 point
4
8
2

Answer 7

The correct response is: 2.

The first energy level of an atom can hold a maximum of 2 electrons.

Answer 8

How do we find the number of neutrons in an atom?
*
1 point
Add the atomic number and mass number together
Subtract the number of electrons from the number of protons
Subtract the number of protons from the mass number

Answer 9

The correct response is: Subtract the number of protons from the mass number.

The mass number is the sum of protons and neutrons, so to find the number of neutrons, you subtract the number of protons (atomic number) from the mass number.

Answer 10

Which of the following does the atomic number of an atom or element represent?
*
1 point
The number of protons in the atom
The number of neutrons in the atom
The number of particles in the nucleus of the atom

Answer 11

The correct response is: The number of protons in the atom.

The atomic number indicates the number of protons in the nucleus of an atom, and in a neutral atom, it also equals the number of electrons.