Which force has an infinite range and is always attractive?

What types of energy are produced during firework displays?

A 20.5 kg ball moving at 38.5 m/s on a horizontal, frictionless surface runs into a light spring of force constant 5.15 N/cm. Use the work-energy theorem to find the maximum compression (in m) of the spring.

what is junction resistance? ... ?

When 7.9*1014 Hz light shines on a plate of unknown material, it is determined that the stopping potential is 1.1 V. Determine the work function (in eV) & the cutoff frequency. Wo = eV fo =

A woman throws a baseball from the back of an airplane to the front. From the perspective of the woman, the baseball travels at an average speed of 20 m/s. To an observer on the ground, the airplane is traveling at a constant speed of 820 km/h.

A student uses an indicator to measure the pH of a solution. The indicator shows a pH of 7. What must be true of this solution? The solution contains neither hydronium ions nor hydroxide ions.

What is the purpose of a valve?

A particle travels 15 times around a 10-cm radius circle in 42 seconds. what is the average speed (in m/s) of the particle?

Where are the magnetic fields stronger near a bar magnet? A) Top B) Center C) Ends D) Bottom

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.