2. DESCRIBE What was the heliocentric theory? Why was it revolutionary?

Differentiate between a conductor and an insulator. 250 words remaining $\square $

Who first discovered Jupiter through a telescope? Nicolas Copernicus Isaac Newton William Herschel Galileo Galilei

How long does a fire extinguisher provide full power? no more than 15 full seconds no more than half a minute no more than 10 full seconds

Isaac Newton's work on gravity showed that: The universe operated according to mathematical principles Gravity did not exist Only earth had gravity Gravity was a religious concept

If a chipmunk dropped an 0.25 kg acorn from the top of a tree and it had a velocity of $4m/s$ right before it hit the ground, then how much kinetic energy did it have? Enter the answer

How does energy transfer in a longitudinal wave? Perpendicular to the wave's direction Parallel to the wave's direction In a circular motion At an angle to the wave's motion

If the amplitude of a sound wave traveling in air is increased then what happens to its speed? a increases b decreases C stays the same d doubles

One year on Jupiter lasts how many Earth years? zm 4 years 6 years 12 years 20 years

Ocean water has a density of $1.025\frac {g}{ml}$ . How much mass does 1 liter of ocean water have? Answer in kg. 0.001025 kg 0.1025 kg 1.025 kg 1025 kg

2. A rope is thrown over a beam, and one end is tied to a 300 N bundle of lumber. You pull the free end of the rope 2 m with a force of 400 N to lift the lumber off the ground. How much work have you done? __