im so confused i have to identical questions just the numbers switched. the first question is "a 1 kg block of copper is put into 2kg of water how much energy is needed to increase temp by 10⁰c the othet question you can probably guess please tell me the difference and if it uses diff nunbers in the equation the last person who answeree just spammed random letters​

Aball tossed vertically upward from the ground next to a building passes the bottom of a window 1.8 s after being tossed and passes the top of the window 0.20 s later. the window is 2.0 m high from top to bottom. what was the ball's initial velocity? the unit vector j^ is directed upward. how far is the bottom of the window from the launch position? how high does the ball rise above the launch position?

Suppose you have three polarizing filters, with the second at an angle of 42∘ to the first and the third at an angle of 90∘ to the first. by what perfect will the original intensity of unpolarized light be reduced to after passing through all three filters?

Hydrogen and helium are both members of?