Thanh AD có trọng lượng không đáng kể,đươc giữ nằm ngang cân bằng nhờ bản lề cố định A và sợi dây treo CE không giãn nghiêng một góc 30° so với phương nằm ngang, tại B treo vật có trọng lượng P=10KN như hình. Lực chủ động là ?

When a 5.0kg cart undergoes a 2.2m/s increase in speed, what is the impulse of the cart

Scout feels ill one day before school. her mother puts a thermometer in her mouth and the temperature begins to climb to 100°f. what is happening between the cooler thermometer and scout's body? a) scout's body is applying a force to the particles in the thermometer. b) kinetic energy is being transferred from her mouth to the thermometer. c) potential energy is being lost by the thermometer and gained by scout's body. d) the potential energy stored in foods is converted to mechanical energy to raise the mercury in the thermometer.

What is a view of science and psychology that says the value of knowledge depends on its usefulness? a. pragmatism b. psychotherapy c. physiology