The 20 C electricity has passed through the coil of the 230 V iron in 4 seconds Calculate the electrical resistance of this spiral.

Light waves have ... A) Frequency B) Wavelength C) Both frequency and wavelength D) Neither frequency nor wavelength

He density of ice is 0.92 g/cm3; and the density of seawater is 1.03 g/cm3. a large iceberg floats in arctic waters. what fraction of the volume of the iceberg is exposed?

List all types of electromagnetic radiation that have wavelengths shorter than those visible light

Thorium-232 decays by alpha decay. Part of the nuclear equation is shown below. Fill in the blank with a number. 232/90

A ball is thrown horizontally from a cliff at a speed of 10 m/s. Calculate its speed one second later (be sure to show your math steps)

Mass m1 is has an initial velocity v1i. Mass m1 collides with a stationary mass m2. The net external force on the two particle system is zero. If the two masses stick together after the collision, then the final speed vf of the two masses is:

What can one say for sure about element #99, Einsteinium (Es)) ? a) There's no such element! b) It is an alkali metal. c) It is radioactive. d) It has 253 neutrons. e) It increases one's 1. Q. slightly when swallowed.

What is the pH of neutral substance?

The velocity of a wave depends only upon the ... ?

When studying atoms, scientists can ignore the blank force between charged particles that make up the atoms because it is many millions of times smaller than other forces in the atom