Which of the following is true about parallax?

A) It is used to measure distances to stars.

B) The parallax measures of distant stars are to tough to measure

C) The nearest stars have the smallest parallax angles.

D) Both A and B.

What happens to the amplitude of a sound wave when energy transfer is increased? A As the transfer of energy is increased, the amplitude increases causing the sound to get louder.

A bullet of mass m = 10 gram strikes a ballistic pendulum of mass m=2.0 kg. the center of mass of the pendulum rises a vertical distance of h=12 cm. assuming the bullet remains embedded in the pendulum, calculate its initial speed.

How did humans decide how long a year should be

A penny is dropped from the top of the empire state building, a height of 381 meters. find the final velocity of the penny

Why would heating the gas in an air balloon make the balloon rise?

You pull a simple pendulum of length 0.225m to the side through an angle of 3.50∘ and release it. Part A How much time does it take the pendulum bob to reach its highest speed? Take free fall acceleration to be 9.80 m/s^2.

What is the velocity of a wave having a frequency of 25 Hz and a wavelength of 10m

What is the force on a 1-kg ball that is falling freely due to the pull of gravity

Which would react chemically by forming an ionic bond? A. 2 chlorine atoms with 7 valence electrons each B. 1 neon atom with 8 valence electrons and 1 lithium atom with 1 valence electron C.

Which of these are considered an oxidizing mutagenic agent? x-rays benzopyrene gamma rays