Work done is the energy A projectile has vertical transferred to an object. and horizontal motion at 4180 J of heat energy is the same time. needed to change the (a) 3000 J temperature of 1 kg of 155 J 27 m s-1 water by 1 °C. 2000 N 20 N (a) 9.8 m (a) 47 000 J 10 m 41.8 m 112 750 J 45 m 4100 J kg-1 °C-1 (a) 25.6 m 270 J / J kg-1 °C-1 16 800 J 2.24 m 0.4 kg 5.5 kg 300 N Monkey gets struck by 7.5 °C arrow. It falls at the same 4 °C 40 m rate as the arrow. 752 400 J 3 x 107 J Gun and bullet hit the ground at the same time. 380 J kg-1 °C-1 25 km They fall at the same rate. 2.5 °C 7890 N (a) 2 s 6 m s-1 12 kg 6960 J (a) 105 m (a) 618 J kg-1 °C-1 4.5 N 30 m s-1 The experimental value is larger. This is because (a) 1162.5 m not all heat energy is 0 m absorbed by the copper 155 m s-1 block. Air resistance will slow the box. A projectile with a high enough horizontal velocity will fall with the curvature of the Earth, staying in orbit. Specific Heat Capacity Specific Latent Heat (p28 - 30) Projectile Motion (p22 25) – (p26 27) –
Work done is the energy transferred to an object. (a) 3000 J 155 J 2000 N 20 N 10 m 45 m 16 800 J 300 N 40 m 3 x 107 J 25 km 7890 N 6960 J 4.5 N Projectile Motion (p22 – 25) A projectile has vertical and horizontal motion at the same time. 27 m s-1 (a) 9.8 m 41.8 m (a) 25.6 m 2.24 m Monkey gets struck by arrow. It falls at the same rate as the arrow. Gun and bullet hit the ground at the same time. They fall at the same rate. (a) 2 s 6 m s-1 (a) 105 m 30 m s-1 (a) 1162.5 m 0 m 155 m s-1 Air resistance will slow the box. A projectile with a high enough horizontal velocity will fall with the curvature of the Earth, staying in orbit. Specific Heat Capacity (p26 – 27) 4180 J of heat energy is needed to change the temperature of 1 kg of water by 1 °C. (a) 47 000 J 112 750 J 4100 J kg-1 °C-1 270 J / J kg-1 °C-1 0.4 kg 5.5 kg 7.5 °C 4 °C 752 400 J 380 J kg-1 °C-1 2.5 °C 12 kg (a) 618 J kg-1 °C-1 The experimental value is larger. This is because not all heat energy is absorbed by the copper block. Specific Latent Heat (p28 - 30)
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