An aluminum flagpole is 23 m high. By how much does its length increase as the temperature increases by 43 C°? (The linear expansion coefficient of aluminum is 23 × 10-6 /C°.)

The voltage through a generator increases as the water flow rate through the pipe increases. It is because

Three charges are located along a horizontal straight line. The charge on the left has a force of 6.00 N on it to the left. The charge in the middle has a force on it of 4.00 N to the right. What is the force (magnitude) on the charge on the right? 

A dielectric slab is slowly inserted between the plates of a parallel plate capacitor while the capacitor is connected to a battery.  As it is being inserted:

The image formed by a convex lens is

A circular hole in an aluminum plate is 3.704 cm in diameter at 0.000°C. What is its diameter (in cm) when the temperature of the plate is raised to 57.34°C? The linear expansion coefficient of aluminum is 23.00 × 10-6 /C°.

In a plot of current versus potential difference, which feature characterizes a device that obeys Ohm’s law?

According to the principle of calorimetry

The specific heat capacity of water is 4200 J/kg0 c. How much heat energy is required to change the temperature of 5.0 Kg of water from 250C to 850C?

If current through a resistor is 10 mA when the applied voltage is 3 V. The resistance (in ohm) in the circuit is