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After 35 minutes of running, at the 9km points in a 10km race, you find yourself 100 m behind the leader and moving at the same speed. what should your acceleration be if you are to catch up by the finish line? assume that the leader maintains a constant speed throughout the entire race
A system does 136 J of work on its environment and gains 66 J of heat in the process. compute the change in the internal energy of the system
You are on a bridge which is a height 30m above the water. You first drop a ball and then 1.5 seconds later throw a second ball down so that both balls hit the water at the same time.
A siren has a frequency of 750 Hz when it is at rest, whereas it has an apparent frequency of 800 Hz when it is moving toward a stationary observer
As measured in Earth's frame of reference, two planets are 4.25×10^5 km apart. How fast is the ship traveling
Find the critical angle of incidence for a ray of light going from a diamond to air
A polar bear of mass 436 kg stands on an ice floe 58.10 cm thick. What is the minimum area of floe that will just support the bear in saltwater of density of 1030 kg/m3? The specific gravity of ice is 0.88.
A certain superconducting magnet in the form of a solenoid of length 0.70 m can generate a magnetic field of 10.0 T in its core when its coils carry a current of 50 A. The windings, made of a niobium-titanium alloy, must be cooled to 4.2 K. Find the ..
A 0.70-m-diameter vat of liquid is 2.7m deep. The pressure at the bottom of the vat is 1.5atm. What is the mass of the liquid in the vat
q1. the lines in a grating are uniformly spaced at 1520nm. analyse the angular separation of the second order bright
A point charge 8.00 nC is at the center of a cube with sides of length 0.200m. compute the electric flux through the surface of the cube
The rotor in a certain electric motor is a flat, rectangular coil with 81 turns of wire and dimensions 2.57 cm by 4.32 cm. Find the maximum torque acting on the rotor
q1. an outfielder throws a 0.150 kg baseball at a speed of 50.0 ms and an initial angle of 30.0deg. what is the kinetic
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