A 10 gram coin is which is initially at rest is dropped from the observation deck of a skyscraper 350 meters above the street below. 1. What is the work done by gravity on the coin as it falls? (In Joules)
2. Because there is air resistance the coin was slowed and hit the ground with a final velocity of 55 m/s. What is the kinetic energy of the coin at this speed? ? (In Joules)
3. How much work was lost to air resistance as the coin fell? (In Joules)
4. What is the average force exerted on the coin due to the air resistance as it fell?

Aspecial electronic sensor is embedded in the seat of a car that takes riders around a circular loop-the-loop ride at an amusement park. the sensor measures the magnitude of the normal force that the seat exerts on a rider. the loop-the-loop ride is in the vertical plane and its radius is 23 m. sitting on the seat before the ride starts, a rider is level and stationary, and the electronic sensor reads 740 n. at the top of the loop, the rider is upside down and moving, and the sensor reads 370 n. what is the speed of the rider at the top of the loop?

The energy of a photon was found to be 3.38 × 10–19 j. planck’s constant is 6.63 × 10–34 j • s. which color of light corresponds to this photon?

What are some properties of transverse waves?