What is the hardest rock to break with a hammer

A sprinter accelerates from rest to a velocity of 12m/s in the first 6 seconds of the 100 meter dash. a) how far does the sprinter travel during the first 6 seconds? b) how much farther does the sprinter have to travel to reach the finish line?

Two people are 16km apart on a straight road. They start walking at the same time. If they walk towards each other, they will meet in 2 hours, but if they walk in the same direction (so that the distance between them is decreasing), they will meet

What is the degree of precision of this ruler? cm

A proton moves with a speed of 3.60 106 m/s horizontally, at a right angle to a magnetic field. what magnetic field strength is required to just balance the weight of the proton and keep it moving horizontally?

Write three characteristics of particulate of natuere of matter

A train's mass is 18181.81 kg. What is its weight?

A body of mass 20kg is set in motion by two forces 3N and 4N acting at right angles to each other, determine the magnitude of the acceleration

Gerry and Lena work in a modern physics laboratory and study nanotechnology, which is a new type of technology that allows control over individual particles as small as molecules or atoms.

What can you do to reduce the electric uses within your home?

What is the scientific name given to potato