Break down of rock can be chemical or mechanical

How much work is done when a hoist lifts a 290-kg rock to a height of 7 m?

In what ways is climate controlled by the sun and the water cycle?

Two current carrying wires are parallel to one another and separated by 2cm. If the distance between them is increased to 4cm the new force will be what factor times the original force? a) 2 b) 4 c) ½ d) ¼ e) none of the above

True or false ionic compounds that dissolve in water conduct electricity because they break into gases that move freely

A Stone of mass 20kg fall from a height 5m. what is the time take to reach the ground? 2. The average kinetic energy of body (neglect energy loss and take gravity 10m/s2)

What is the total number of atoms in the following formula? CaBr2 4 3 2 1

Object A with a mass of 500 kilograms hits stationary object B with a mass of 920 kilograms. If the collision is elastic, what happens after the collision? A) Both object A and object B move forward but with different velocities.

A young man walks daily through a gridded city section to visit his girlfriend, who lives m blocks East and nblocks North of where the young man resides.

Aliens from planet Moby have three alleles for skin color: R (red) W (white) and B (Blue). If all of these alleles are codominant and aliens on planet moby can only inherit two alleles for a gene, what are the six possible genotypes for skin color

The difference between two numbers is 15. When twice the smaller number is subtracted from three times the larger number, the difference is 58. What is the larger number?