Send Message Which of the following statements about the Sun is TRUE?
OA) Living things depend on the Sun for heat and light.
OB) The surface of the Sun is even hotter than the core.
C) The Sun is made up of helium gas.
OD) The Sun orbits the Earth in 365 days.

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct

Henry, whose mass is 95 kg, stands on a bathroom scale in an elevator. the scale reads 830 n for the first 2.4 s after the elevator starts moving, then 930 n for the next 2.4 s. part a what is the elevator's speed 4.8 s after starting? express your answer with the appropriate units.

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?