1. astronomers' ever-expanding knowlage of the universe has coinsided with the development of a collection of indirect distance measurment techniques.
a. the cosmic distance scale
b. the cosmic microwave background
c. light echo distance
d. differential galactic rotation

1. A

2. B

3. A

4. C

5. A

6. A

7. A

8. A

9. B

10. D

Just took it 100%

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.

gpe = mass x gravity constant x height or… gpe = mgh

where… mass: measured in kilograms (kg)

gravity: gravity constant on earth = 10.00 m/s2

height: measured in meters (m)

gpe: measured in joules (j) or kilojoules (kj)

how do you solve gpe?

gravitational potential energy (gpe) is the energy an object has because of its position above the. ground.

gpe = mass x gravity constant x height or… gpe = mgh.

mass:

note: to earn full marks when solving science word problems, you must show your work:

formula.

example:

given values:

mass = 0.3 kg.