Why does the nucleus of an atom have a positive charge?

If the same amount of heat is supplied to two different materials that have same mass. Why don't they have equal increasing of temperature?

Astronomers today use the concept proposed by Christian Doppler and Edwin Hubble to determine the motion of stars and galaxies.

Predict which molecule will show a similar relationship between its heat of fusion and its heat vaporization that water does

Find the wavelength of the Balmer series spectral line corresponding to n = 12.

When light from the Sun strikes the surface of the Earth, this light is absorbed by the ground. The ground, in turn, emits infrared light-which is actually invisible to human eyes-back into the air.

If a 0.200-kilogram ball sits on a shelf 2.00 meters from the floor, how much mechanical energy (me) does it possess?

Which statement describes static equilibrium? A. The forces on an object are unbalanced. B. An object has balanced forces acting on it and constant velocity. c. The forces on an object are balanced and there is no motion. D.

What is the rate at which work is done in lifting a 35 kg object vertically at a constant speed of 5 m/s? 1 1700 W 2 340 W 3 180 W 4 7.0 W

The owner of a window treatment company wants to design Shades that will cover the windows of the house.

What direction of magnetic field lines inside my magnet