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A steep cliff west of Lydia's home reflects a 1460-kHz radio signal from a station that is 69.9 km due east of her home. If there is destructive interference, what is the minimum distance of the cliff from her home. Assume there is a 180° phase shift when the wave reflects from the cliff.
Calcualte the radiation dosage (in rads) for a 67-kg person that is exposed to 6.0 seconds to a 3.0 Ci source of beta radiation.
A beam of 16MeV deuterons (m=2mp) from a cyclotron falls on a copper block. The beam is equivalent to a current of 15 microA, At what rate do deuterons strike the block
in a hydraulic system comprised of a reservoir and a pump which is 4 ft above the oil level what would be the pressure
A body of mass M is at rest. It suddenly explodes into three pieces. One mass is .25M, moves due east at 12m/s. Find the velocity of the remianing piece
A 5.00 mL syringe has an inner diameter of 6.00 mm, a needle inner diameter of 0.210 mm, and a plunger pad diameter (where you place your finger) of 1.2 cm. A nurse uses the syringe to inject medicine into a patient whose blood pressure is 140/100..
You are driving along a highway at 35.0 m/s when you hear the siren of a police car approaching you from behind, What is the speed of the police car
An electron is moving east in a uniform electric field of 1.55 directed to the west. What is the speed of the electron when it reaches point B, which is a distance of 0.380 east of point A
The arm of a crane at a construction site is 14.4 m long, and it makes an angle of 40° with the horizontal. Assume that the upmost load the crane can handle is limited by the amount of torque the load produces at the base of the arm.
It bounces off with the same speed and angle. If the ball is in contact with the wall for 0.2 s, illustrate what is the average force exerted on the ball by the wall
A heat engine is composed of of a monatomic ideal gas which runs in the following cycle, What is the efficiency of this heat engine and What is the temperature at point B
A loudspeaker of mass 18.0kg is suspended a distance of h = 2.00m below the ceiling by two cables, What is the Tension T in each of the cables
A car is driving directly north on the freeway at a speed of 101 km/h and a truck is leaving the freeway driving 90 km/h in a direction that is 34° west of north
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