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If a car goes over a hill at a speed of 20 m/s, what is the size of the normal force felt by a 60 kg passenger in the car at the very top of the hill? Approximate the hill as a circle with a radius of 15 m.
A 21 kg block on a horizontal surface is attached to a horizontal spring of spring constant k = 2.3 kN/m, What is the kinetic energy of the block when it has moved 2.0 cm from its point of release
three charged particles with q1 -50 nanocoulomb q2 50 nanocoulomb q3 30 nanocoulomb are placed in a triangle. q1 and q2
A car is being pulled out of the mud by two forces that are applied by the two ropes shown in the drawing. The dashed line in the drawing bisects the 30.0° angle. The magnitude of the force applied by each rope is 2900 newtons (N).
A beam of ultraviolet radiation, with frequency of 2.56×1015 Hz is directed at a clean metal surface. Calculate the maximum kinetic energy for an electron dislodged from the surface by the radiation
A coil has resistance R=14Ohms and inductance L=3milliHenries and is powered by a generator with variable frequency and maximum voltage V = 10Volts.
A child is riding across a rough field on a sled. Together, she and the sled have a mass of 73 kg. The sled is being pulled by her brother at an angle of 16º with a force of 356 Newtons. What is her acceleration if the coefficient of kinetic friction..
A rechargeable battery that is completely drained of electrical energy can be completely charged by applying 6.0 mA of current for 1.0 h. how much energy is the battery capable of storing
Pulsed lasers used for science and medicine produce very brief bursts of electromagnetic energy. how many wavelengths are found within the laser pulse
question consider a rectangular loop of wire 6.3 cm by 8.2 cm in a uniform magnetic field of magnitude 1.7 t. the loop
A boat with a horizontal tow rope pulls a water skier. She skis off to the side, so the rope makes an angle of 15.0 degrees with the forward direction of motion. how much work does the rope do on the skier
An electron is accelerated from rest to the point where its DeBrogile wavelength is 1 picometer. How much energy was required to accomplish this
The ends of a thin bar are maintained at different temperatures. The temperature of the cooler end is 8°C, while the temperature at a point 0.13 m from the cooler end is 23°C and the temperature of the warmer end is 48°C. Assuming that heat flows onl..
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