Сколько времени двигалась машина со скоростью 36 км/ч если она проехала 1800 м ответ в минутах

An ideal spring has a spring constant (force constant) of 2500 n/m, is stretched 4.0 cm, how much elastic potential energy does it possess? (a) 3j (b) 0.00j (c) 1j (d) 2j (e) 4j

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

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?