A. A crow bar of length 2 m is used to lift a stone of weight 200 kg. If the fulcrum
is set 50 cm apart from the stone, how much effort should be applied to the other
end of the crowbar to balance it?
[1500 N]

Atomic nuclei of almost all elements consist of

Considering only the earth's rotation, determine how much later the asteroid would have had to arrive to put the explosion above helsinki at longitude 25˚ e? this would have obliterated the city.

An important dimensionless parameter concerned with very high-speed flow is the mach number, defined as v/c, where v is the speed of the object such as an airplane or projectile, and c is the speed of sound in the fluid surrounding the object. for a projectile traveling at 1170 mph through air at 50 ˚f and standard atmospheric pressure, what is the value of the mach number?