3. someone at the third-floor window (12.0 m above the ground) hurls a ball downward at an angle of
45 degrees with a speed of 25 m/s. how fast will the ball be traveling when it strikes the sidewalk
below?

Yardım edin lütfen uzun cevap lazım çok puan veriyorum

Acylinder with a movable piston contains 11.7 moles of a monatomic ideal gas at a pressure of 1.32×10^5 pa. the gas is initially at a temperature of 300 k. an electric heater adds 43200 j of energy into the gas while the piston moves in such a way that the pressure remains constant. cp=20.79 j k^−1 mol^−1 for a monatomic ideal gas, and that the number of gas molecules is equal to avogadro's number (6.022×10^23) times the number of moles of the gas. (a) what is the temperature of the gas after the energy is added? (b) what is the change in volume of the gas? (c) how much work is done by the gas during this process?

Which one of the following research methods can show cause and effect