Ametal ball at 30°c is dropped from a height of 6.2 km. the ball is heated due to the air resistance and it completely melts just before reaching the ground. the molten substance falls slowly on the ground. if the specific heat of lead = 126 jkg−1^o c^{-1} and melting point of lead = 130^oc and suppose that any mechanical energy lost is used to heat the ball, then the latent heat of fusion of lead is:

Aspecial electronic sensor is embedded in the seat of a car that takes riders around a circular loop-the-loop ride at an amusement park. the sensor measures the magnitude of the normal force that the seat exerts on a rider. the loop-the-loop ride is in the vertical plane and its radius is 23 m. sitting on the seat before the ride starts, a rider is level and stationary, and the electronic sensor reads 740 n. at the top of the loop, the rider is upside down and moving, and the sensor reads 370 n. what is the speed of the rider at the top of the loop?

Asample of a gaseous substance changes into liquid. this process is called (blank) and it takes place when heat is (blank) a gaseous system

Part a constants huck finn walks at a speed of 0.60 m/s across his raft (that is, he walks perpendicular to the raft's motion what is huck's velocity (speed and direction) relative to the river bank? express your answer to three significant figures and include the appropriate units. relative to the shore)