A rocket is shot from the top of a cliff 300m above sea level with a velocity u at an angle of 45° to the
horizontal.
e
(a) What time does the rocket take to hit a boat after
it has been fired. Take g = 10 ms?
(b) What is the value of 'u' if the rocket hits the boat
4.2km away on the sea.​

Iwill give 30 points to whoever answers ! what is the formula for actual mechanical advantage and ideal mechanical advantage?

Sort the images based on whether there's a force of attraction or repulsion between the magnets shown. attraction repulsion

Abag of potato chips contains 2.00 l of air when it is sealed at sea level at a pressure of 1.00 atm and a temperature of 20.0 deg c. what will be the volume of the air in the bag if you take it with you, still sealed, to the mountains where the temperature is 7.00 deg c and atmospheric pressure is 70.0 kpa? assume that the bag behaves like a balloon and that the air in the bag is in thermal equilibrium with the outside air.