Akicker kicks a football toward the opponent's goal line during a game. the ball begins its flight with an initial velocity of 70 feet per second when it is kicked at a height of 2 feet by the kicker. to the nearest foot, what maximum height will the ball reach?

you may use the function:
h(t)=-16t^2+70t+2
a. the answer cannot be determined.
b. 79 feet
c. 981 feet
d. 129 feet

What is magnetic flux? explain faraday's law of induction.

The magnetic field inside a superconducting solenoid is 4.50 t. the solenoid has an inner diameter of 6.20 cm and a length of 26.0 cm. determine (a) the magnetic energy density in the field and (b) the energy stored in the magnetic field within the solenoid.

The ultracentrifuge is an important tool for separating and analyzing proteins. because of the enormous centripetal accelerations, the centrifuge must be carefully balanced, with each sample matched by a sample of identical mass on the opposite side. any difference in the masses of opposing samples creates a net force on the shaft of the rotor, potentially leading to a catastrophic failure of the apparatus. suppose a scientist makes a slight error in sample preparation and one sample has a mass 10 mg larger than the opposing sample. if the samples are 12 cm from the axis of the rotor and the ultracentrifuge spins at 70,000 rpm, what is the magnitude of the net force on the rotor due to the unbalanced samples? ( be thorough on your answer)