a person sits on a stool in science class. They weigh 145 pounds. What force does the stool excerpt on the person to prevent them from crushing the stool?

Most of the bright stars in our galaxy are located in the galactic

Arrange the following parts in the order that matches the light path through a light microscope: specimen, ocular lens, objective lens, body tube, light source.

An object with 10 protons 14 electrons and 5 neutrons would have what charge

Consider four objects: A, B, C, and D. If A is negatively charged and B and C attract A but repel each other, what is the charge on B and C? A. Both B and C are positively charged. B. Both B and C are negatively charged. C.

How much force is needed to accelerate a 3kg book in 15m/s

What happens if you double the number of batteries used in a circuit? (Assume all of the batteries A. The current doubles only. o B. The voltage doubles only. C. The current decreases. D The voltage decreases. 0 E. The voltage and current doubles.

What are the three properties of gravitational force between two objects?

One student did an experiment with salt water. The steps of the experiment are shown below. Pour half a cup of salt water into a pan. Keep the pan outside in the sun for a day. Allow all the water in the pan to evaporate.

The Wilson cloud chamber is used to study

Determine the horizontal and vertical components of a vector with a magnitude of 50 and a direction of 42° relative to the horizontal.