Physics Answers

Two balloons are charged with a different quantity of charge: balloon A with 5 nC and balloon B with 4 nC. They are held apart at a separation distance of 3.5 meters. Determine the magnitude of the electrical force of repulsion between them.

Determine the electrical force of attraction between two balloons with separate charges of +4.5 x 10^-8 C and -1.9 x 10^-8 C when separated a distance of 0.95 m.

If the angle of incidence of a ray of light on a plane mirror is 40°, the deviation of the incident ray after reflection is

An object is in equilibrium if all the forces on it balance. The figure below shows a beam weighing 124 N that is supported in equilibrium by a 100-N pull and a force  at the floor. The third force on the bean is the 124-N weight that acts vertically downward.

An object is in equilibrium if all the forces on it balance. The figure below shows a beam weighing 124 N that is supported in equilibrium by a 100-N pull and a force at the floor. The third force on the bean is the 124-N weight that acts vertically downward.

The electrostatic field strength of a proton at distance r is E₁. What would be the strength of the field, E₂ when the distance is doubled?

Determine the total capacitance if a 30  pF  capacitor is connected in series with a 0.03 μF capacitor.     Capacitance =

Khadija becomes positively charged when she touches the metal sphere of a Van der Graaf generator. Why does this happen?

Three capacitors are connected in series: C₁ = 28 μF, C ₂ = 42 μF and C₃ = 64 μF. What is the total capacitance?

A uniform piece of wire has a diameter of 0.30 mm and length 2.25 m has a resistance of 28 Ω. Find the resistivity of the wire.