if a star 100 light years from earth is beginning to expand into a giant star how long will it take for astronomers to observe this development explain

Apart from the masses, how are binary systems with a neutron star different from binary systems with a white dwarf?

Electrically inert metal ball A is connected to the ground by a wire. What happens to the charge of this ball if you bring a negatively charged ball B near it. Justify your answer.

A uniform electric field exists in the region between two oppositely charged parallel plates 1.70 cm apart.

The velocity of an object increases from - 5.0 m/s to - 15 m/s in 2.0 s. What is the average acceleration of the object?

the skate shop owner wants 30 percent of each order to include longboards. he wants to know how many longboards to order out of 50 skateboards

When a potential difference of 13 V is placed across a resistor, the current in the resistor is 1.4 a. What is the resistance of the resistor?

Person with a mass of50 kg jumps up from the earth with an acceleration of 20 newtons. what is his acceleration?

The electron are accelrated to a speed of 2.40*10^7 in 1.8*10^-9, the force experinced by an electron?

You are given two positively charged particles, of equal magnitude, separated by a distance, "d". What will happen to the force field between the two particles when "d" is doubled?

Was ruthersfords model of an atom incorrect or incomplete