A roller coaster with a potential energy of 235,200 J sits at the top of a 30 m high hill. What is the mass of the roller coaster? (Formula: PE = mgh)

A brass wire is to withstand a tensile force of 350N without breaking? A brass wire is to withstand a tensile force of 350N without breaking.

11. Which of the following forces is a contact force? * A. Gravity B. Friction C. Magnetism D. Electricity

Which material is likely to experience a nearly elastic collision?

A 2.5 kg, 20-cm-diameter turntable rotates at 80 rpm on frictionless bearings. Two 500 g blocks fall from above, hit the turntable simultaneously at opposite ends of a diameter, and stick.

Suppose you live at a mid-latitude in the southern hemisphere (such as in australia, new zealand, chile, or south africa). when will you have 12 hours of daylight and 12 hours of darkness?

4. A car of mass 2000 kg is traveling at 45 m/s when the driver spots a policeman anead. i ne univer apprivo the brakes lightly for 3.0 seconds until he slows down below the speed limit. If the average force applied by the brakes was 1.

When does a scientist create the conclusion?

When using a simple machine, the force you must overcome. A simple machine usually multiplies the effort force to exceed the this. Example: Lucy lifts a sack of potatoes using a pulley. The weight of the sack of potatoes is this.

How is ecology diffrent from earth science

Which theory was first proposed by Albert Einstein? A. the theory of special relativity B. the theory of universal gravitation C. the theory of inertia D. the theory of radioactivity ... the answer is A i just found out