Vector r⃗ has a magnitude of 5 m. its x component is 3 m. what are the possible values for its y component?

Curious carl calculated the density of a cube to be 4.50 g/cm3. what is the density of the cube in g/l?

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

If a tank filled with water contains a block and the height of the water above point a within the block is 0.8 meter, what is the pressure at point a?