When the temperature of the air is 50°c, the velocity of a sound wave traveling through the air is approximately

a. 50 m/s.
b. 30 m/s.
c. 361 m/s.
d. 381 m/s.

Free runners jump long distances and land on the ground or a wall. how do they apply newton’s second law to lessen the force of impact?

The diagram shows four locations in the electric field of a positive point charge m. at which location is the electric potential the greatest.

Ametal ring 4.20 cm in diameter is placed between the north and south poles of large magnets with the plane of its area perpendicular to the magnetic field. these magnets produce an initial uniform field of 1.12 t between them but are gradually pulled apart, causing this field to remain uniform but decrease steadily at 0.240 t/s . (a) what is the magnitude of the electric field induced in the ring? (b) in which direction (clockwise or counterclockwise) does the current flow as viewed by someone on the south pole of the magnet?