In an electric circuit it must be what or there will be no flow of electricity?

A 100W light bulb worked 6h. How much will we pay for electricity if 1KWh costs 6 dinars?

If the velocity of a long jumper during take-offat an angle of 30 degrees is 42 f/s, how fast is he moving forward (Vx) and how fast is he moving upward (Vy) ? The answers should be in international units (m/s). 1 foot = 0.3048 m

You can hear someone around the corner before you can see them due to reflection, diffraction, refraction, or absorption?

Which of the following statements concerning revolution is true? A. Earth revolves around the sun. B. Earth revolves around its axis. C. The sun revolves around its axis. D. The revolution and rotation of earth are identical.

According to a relatively recent discovery which member of the solar system has one satellite

A 5.90-g lead bullet traveling at 410 m/s is stopped by a large tree. If half the kinetic energy of the bullet is transformed into internal energy and remains with the bullet while the other half is transmitted to the tree, what is the increase in

How do you scientists determine the number of neutrons in an isotope of an atom?

Why is energy efficiency important to society's need to be efficient with energy usage?

A wave has a wavelength of 9 mm and a frequency of 14 hertz. What is its speed?

Where would you weigh the most? Mars Pluto Earth The Sun The moon