Which of the following groups of elements are included in the main group of elements?

In the process of electricity, what flows through the wires? A. protons B. neutrons C. electrons D. positrons

What is the equivalent resistance of a pair of 1 ohm resistors in series? in parallel?

When ultraviolet light with a wavelength of 400 nm falls on a certain metal surface, the maximum kinetic energy of the emitted photoelectrons is measured to be 1.10 ev.

In order to be considered an ion, an atom must have a A. Positive charge B. Charge C. Negative charge D. Neutral charge

What can cause a big city to be warmer than the surrounding countryside?

White light falls on a yellow filter, if: (a) A green filter is placed behind a yellow filter, what is the colour of the light that will emerge from the green filter?

Calculate the energy equivalent in joules of the mass of a proton. [Show all work, including the equation and substitution with units.]

If the weight is 950 newtons, what is the mass?

You are standing against the wall near a corner of a large building. A friend is standing against the wall that is around the corner from you. You can't see your friend. How is it that you can hear her when she talks to you?

What is general relativity in easy terms?