What is the weight of an object on earth that has a mass of 45 kg

The device shows the relative humidity at 22 degrees celsius. What's the water vapor density if the maximum water vapor in air at this temperature is 20 gram/cubic meter

Which of the following transfers heat in the form of a wave? a. conduction b. radiation c. convection d. nuclear fission

A person is pushing a box. The net external force on the 60-kg box is stated to be 90 N. If the force of friction opposing the motion is 30 N, what is the acceleration of the box?

What is the difference between P and S waves

Compare waves on a pond and electromagnetic waves. 1. A wave on a pond is a mechanical wave which doesn't require a medium to travel. 2. A wave on a pond is an electromagnetic wave which doesn't require a medium to travel. 3.

A new object has been discovered in the solar system. In your own words, justify how the object can be proved to be a comet.

What is cosmic microwave background radiation?

Ocean water has a salinity of 35 parts per thousand. Fresh water has a salinity of less than 0.5 parts per thousand. What can you conclude from this information? A. Ocean water is rich in salt minerals. B.

You decide to add up all the work you did yesterday. If you accomplished 10,000 newton·meters of work yesterday, how much work did you do in units of joules?

What causes day and night on earth?