Physics Final

60 terms by Pamperedkay

Study  only

Flashcards Flashcards

Scatter Scatter

Scatter Scatter

Create a new folder

mass*gravity m/g

9.8 m/s

A heavy rock and a light rock in free fall (zero air resistance) have the same acceleration. The reason the heavy rock doesn't have a greater acceleration is that the

ratio of force to mass is the same.

14 m/s

increases

3000 N

A math book and a physics book are tied together with a length of string. With the string taut, one book is pushed off the edge of a table. As it falls, the other book is dragged horizontally across the table surface. With no friction, acceleration of the books is

a value between 0 and g

When an increase in speed doubles the momentum of a moving body, its kinetic energy

more than doubles

When an increase in speed doubles the kinetic energy of a moving body, its momentum

increases but less than doubles

torques

When a spinning system contracts in the absence of an external torque, its rotational speed increases and its angular momentum

remains unchanged.

Consider a ball rolling down an inclined plane. The normal force on the ball (the force perpendicular to the plane).

is less than mass/gravity always

Consider a ball rolling in a horizontal circular path on the inside surface of a cone. The normal force on the ball

is greater than mg always

When a ball at rest hangs by a single vertical string, tension in the string is mg. If the ball is made to move in a horizontal circle so that the string describes a cone, string tension

is greater than mg always

Imagine you're standing on the surface of a shrinking planet. If it shrinks to one-tenth its original diameter with no change in mass, on the shrunken surface you'd weigh

100 times as much

month

sun

A spacecraft on its way from Earth to the Moon is pulled equally by Earth and Moon when it is

closer to the moons surface

atmosphere

The mass of a classical atom comes mostly from its ____ ; and its volume from its ______.

nucleons; electrons

increases

decreases

hydrogen

The electrical force of attraction between an electron and a proton is greater on the

Neither; both are the same.

Immediately after two separated charged particles are released from rest, both increase in speed. The particles therefore have

either the same or opposite signs of charge.

the same

decreases

increases

32q

direction

voltage

light

All of the following are electromagnetic waves EXCEPT

None is outside the family; all are electromagnetic waves. radio waves, light waves microwaves, x rays

shortened

frequency

During the time an aircraft produces a sonic boom, the aircraft is

flying faster than sound

The phenomenon of interference occurs for

both of these, light waves and sound waves

air temperature

interference

one-half

None of these
frequency
speed
wavelength

Which of these changes when light refracts in passing from one medium to another?

both of these
wavelength and speed

red light

red

red and green

de-excitation

transverse waves

spectrum

If the Sun collapsed to become a black hole, Planet Earth would

continue on it's present orbit

Any atom that emits an alpha particle or beta particle

becomes an atom of a different element, always.

9 minutes

When a uranium nucleus undergoes fission, the energy released is primarily in the form of

kinetic energy of fission fragments.

When a fusion reaction converts a pair of hydrogen isotopes to an alpha particle and a neutron, most of the energy released is in the form of

kinetic energy of the neutron.

none of these

all speeds

The equation E = mc 2 indicates that energy

and mass are closely related.

Example: