155 / 5000 Có hai điện tích q1 và q2 đặt cách nhau 20cm tại hai điểm a và b. Biết q1 = -9uC, q2 = 4uC. Tìm vị trí M tại đó điện trường bằng không.

Acar travels along a highway with a velocity of 24 m/s, west. the car exits the highway; and 4.0 s later, its instantaneous velocity is 16 m/s, 45° north of west. what is the magnitude of the average acceleration of the car during the four-second interval?

Aphysical change is a change in the size, shape,, or stafe of matter true or false

Who was the first scientist to measure speed as distance over time?