As a roller coaster goes downhill

A teacher pushed a 10kg desk across a floor for a distance of 5m. she exerted a horizontal force of 20n. how much work was done?

Warsaw, Poland, Olivia Oliver of Nova Scotia broke the world record for being the fastest spinner on ice skates. She achieved a record 342 rev/min, beating the existing Guinness World Record by 34 rotations.

Which of these best describes how the kinetic energy of carbon dioxide molecules change as the carbon dioxide is heated? Kinetic energy decreases. Kinetic energy increases. Kinetic energy increases, then decreases.

A luggage handler pulls a 20.0 kg suitcase up a ramp inclined at 33.0 ∘ above the horizontal by a force F⃗ of magnitude 161 N that acts parallel to the ramp. The coefficient of kinetic friction between the ramp and the incline is μk = 0.300.

The sun is located at one of the two BLANK in the shape of earths orbital path

What is a circuit, s resistance if 12v produces 2A of current?

Dinosaur fossils are too old to be reliably dated using carbon-14, which has a half-life of about 5730 years. Suppose we had a 68 million year old dinosaur fossil.

A power station delivers 510 kw of power at 12,000 v to a factory through wires of total resistance of 2.5 ω. how much less power is wasted if the electricity is delivered at 47,000 v rather than 12,000 v?

Two spaceships of mass 300,000 kg are 250 m apart. what is the force of gravity between them? (G = 6.67 times 10⁻¹¹ N*M²/kg²)

Air pressure is 1.0 · 105 N/m2, air density is 1.3 kg/m3, and the density of soft drinks is 1.0 · 103 kg/m3. If one blows carefully across the top of a straw sticking up 0.