You use me everyday but let me rest at night. I have an identical twin beside me all the time. For some reason you always cover me up. I am not alive but I have a soul. What am I?

If a projectile fired beneath the water, straight up, breaks through the surface at a speed of 13m/s, to what height above the water will it ascend

If a positive metal sphere touches a negative metal sphere what will happen?

What is the resistance for each resistor? What is the voltage of the battery?

A sound with an intensity greater than (blank) dB can cause damage to human ears

A plane travels 2.5 KM at an angle of 35 degrees to the ground, then changes direction and travels 5.2 km at an angle of 22 degrees to the ground. What is the magnitude and direction of the planes total displacement?

A car starts from rest and travels for 7.0 seconds with auniform acceleration of + 2.5 m/s^2. The driver then applies thebrakes, causing a uniform acceleration of - 3.0 m/s^2. If the brakesare applied for 2.

How many orbitals in an atom could have these sets of quantum numbers?

A personal computer uses a number of chips mounted on a circuit board called?

If all organisms have DNA (same 'stuff') how come all organisms look different?

How much voltage can be stored in a thundercloud?