Physics Answers

An object is projected from the ground with an initial velocity of 20.25 m/s at 50degrees above the horizontal. Find the following. (Show your complete solution.)                               a. Horizontal and vertical components of its initial velocity              b.. Time to reach the maximum height                          c. Range

Polarized glasses counter the glare from metallic surfaces by not allowing light of a particular orientation to pass through.True or False

Frame A is stationary. A ball is fired in the x-direction with a speed of 5 m/s. If Frame

B is moving along the same direction as the ball with a speed of 11 m/s, in which

reference frame is the ball moving faster?

sec/ohm is equal to

a ball was pushed by a force of 17.27 newton going to east. and travels a certain distance of 0.05678 kilometer in 0.033 minute. find the ball's momentum

Compton Scattering. Find the scattered wavelength for a 71 picometer x-ray is incident on a calcite target. What is the maximum shift that can be observed in this experiment?

1. Find the cost to run a 1200-watt microwave oven, if you make microwave popcorn in 5 minutes.

(price per kWh is 13.267 cents)

A broken leg about 1.2kg in mass receives an equivalent dose of 0.40 mSv. (For x-rays RBE =1.0 Sv/Gy or 1.0 rem/rad)

(a) Find the equivalent dose in mrem

(b) What is the absorbed dose in mrad?

(c) What is the absorbed dose in mGy?

(d) If the x-ray energy is 50keV, how many x-ray photons are absorbed?

A car moving with a velocity of 54 km/h accelerate uniformly at the rate of 2 m/s². Calculate the time taken to cover this distance

Find the scattered wavelength for a 71 picometer x-ray is incident on a calcite target. What is the maximum shift that can be observed in this experiment?