During World War I, the Germans had a gun called Big Bertha that was used to shell Paris.
The shell had an initial speed of 1.66 km/s at
an initial inclination of 38.8 to the horizontal.
The acceleration of gravity is 9.8 m/s^2

How far away did the shell hit? (in km)
How long was it in the air (in s)

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct

One object has a mass of 1 kg and another object has a mass of 3 kg. if the speeds are the same, which of the following is true about their kinetic energy?

Which of the following are used in an electrochemical cell? a. electrodes b. electrolyte c. terminals d. all of the above