Phys. Sci. Ch 4 Midterm Review

Energy

100

The energy of motion

kinetic energy

200

Energy associated with the forces acting upon an object

potential energy

300

The ability to do work and change matter

Energy

400

the energy of electromagnetic radiation 

radiant energy

500

What is caused by a disturbance moving through a substance

wave

Scientists and formulas

100

Who discovered matter can be converted into energy and energy can be converted into matter (under certain conditions)

Albert Einstein

200

What is the equation for speed?

S= d/t  (or v=d/t)

300

What letter does the scientist use to represent speed?

V

400

Which formula did Einstein create?

E=MC²

500

What is the formula for kinetic energy?

KE=1/2 mv²

Things that affect energy and formulas

100

These things affect the rotational kinetic energy: increasing mass and increasing speed. Name two others.

the size of the object

the object's shape

200

An athlete throws a .80kg javelin at 25 m/s; what is the kinetic energy

KE= 2000J

300

What is the formula for gravitational potential energy?

PE= mgh

400

What is the value of g (the strength of gravity at the Earth's surface)

9.81 m/s²

500

Suppose a .50kg ball is lifted to 1.0 m above ground level. What is the gravitational potential energy?

4.905 J

MISC 1

100

What is the kinetic energy of a 10 kg car that is moving 4 m/s?

80 J

200

There is a box at the top of a hill that is 10 m high and the box has a mass of 20kg.

What is the potential energy of the box?

1960 J

300

Name 2 forms of measurement

span, palm, digit, foot, cubits

400

Convert the following:

34mm = ________ cm

3.4 cm

500

3 km = ______ m

3000