Julius competes in the hammer throw event. The hammer has a mass of 7.26 kg and is 1.215 m long.
What is the centripetal force on the hammer when it has a
tangential speed of 31.95 m/s? The answer is rounded off
to the nearest whole number
0 190 N
O 840 N
0 1,400 N
O 6,100 N

Ineed the answer to question 1 , i’m desperate

The magnitude of the magnetic field at a certain distance from a long, straight conductor is represented by b. what is the magnitude of the magnetic field at twice the distance from the conductor? a. at twice the distance, the magnitude of the field is 4b.b. at twice the distance, the magnitude of the field is 2b.c. at twice the distance, the magnitude of the field is b/2.d. at twice the distance, the magnitude of the field is b/4.e. at twice the distance, the magnitude of the field remains equal to b.

What efficiency of a car's engine when heat input is 200,000 joules and waste heat is 150,000 joules? a. 75% b. 35% c. 25% d. 85%