An archer pulls back 0.75 m on a bow which has a stiffness of 200 N/m. The arrow weighs 50 g. What would be the velocity of the arrow immediately after release?

A ball hits a wall and bounces off as shown. Assume that the collision is elastic. Which vector best represents the direction of the change in momentum of the ball?

There are 14 elements in actinoid series. Which element is does not belong to this series?

A charge of q = +7.07 μC is located in an electric field. The x and y components of the electric field are Ex = 5.68E+3 N/C and Ey = 7.66E+3 N/C, respectively. What would be the magnitude of the force on the charge?

The second order bright fringe of 640.0 nm light falling on a diffraction grating is observed at 16.9o. How far apart are the slits? At what angle will the fourth order be observed?

A fire tong of length 20 cm is used to hold a piece of hot iron of 150 gram. If the point of application of the effort is 4 cm away from the fulcrum, what is the magnitude of the effort applied?

If a 20 ohm resistor and a 300 ohm resistor were connected in a series what single resistor could be used as a replacement for them and have the same effect in the electrical circuit AND same question except applied to parallel circuit?

A nut cracker of length 25 cm kept at a distance of 15 cm from the hinge breaks a nut by applying an effort of 30 kgf. What is the magnitude of the load?

A charge Q is placed on the x axis at x = +4.0 m. A second charge q is located at the origin. If Q = +75 nC and q = -8.0 nC, what will be the magnitude of the electric field on the y axis at y = +3.0 m?

What should you use to lift a huge block of granite up to a certain height?

A sinusoidal wave has period 0.10s and wavelength 2.0m. What will be the wave speed?