A book weighs 4 N. When held at rest in your hands, the net force on the book isQuestion 9 options:

0 N.

0.4 N.

4 N.

39 N.

none of the above

A homeowner is considering these heating systems for heating his house: Electric resistance heating with $0.12/kWh and 1 kWh = 3600 kJ, gas heating with $1.34/therm and 1 therm = 105,500 kJ, and oil heating with $2.

A car is traveling at a constant speed of 12 m/s. When the driver accelerates, the car reaches a speed of 26 m/s in 6 s. What is the average acceleration of the car? OB. 2.3 m/s/s A. 2 m/s/s C. 4.3 m/s/s D. 84 m/s/s

Why might political parties prefer closed primaries to open primaries

1.) Which choice is an example of a consumer? A.) sun B.) fungi C.) bee D.) tree

An object of mass 12kg is held at a weight of 5m above the ground for 30s. Calculate the workdone during this period.

Ethylene (C2H4) reacts with oxygen gas to produce carbon dioxide and water. 45.0 grams of ethylene reacts, how many grams of carbon dioxide gas will be produced?

What causes ice to melt and water to boil

A block of mass 3.5 kg slides down a frictionless inclined plane of length 6.4 m that makes an angle of 30 degrees with the horizontal. if the block is released from rest at the top of the incline, what is its speed at the bottom

What is the wavelength of an earthquake wave if it has a speed of 5 km/s and a frequency of 10 Hz?

The gamma ray released by each decay carries 140kev of energy. find the total energy e released by decays in the 2 hours.