A)Two charged particles exert an electrostatic force of 20N on each other. What will be the magnitude of the force if the distance
between them is increased to three times the original distance?

As shown in fig. p3.64, a closed, rigid tank fitted with a fine-wire electric resistor is filled with refrigerant 22, initially at 2108c, a quality of 80%, and a volume of 0.01 m3. a 12-volt battery provides a 5-amp current to the resistor for 5 minutes. if the final temperature of the refrigerant is 408c, determine the heat transfer, in kj, from the refrigerant.

Atrain departs from its station at a constant acceleration of 5 m/s. what is the speed of the train at the end of 20s?

How many hydrogen (h) atoms are in one molecule of sulfuric acid, h2so4? (1 points) 1 2 4 7