Determining the spring constant problem
A 1000 kg safe is held 2 m above a heavy duty spring when the rope holding it breaks. The safe compresses the spring 50 cm. What is the spring constant?
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While driving in your car with a constant speed of 15.0 m/s, you encounter a bump in the road that has a circular cross-section. The radius of curvature of the bump is 35 m What is the apparent weight if the speed is now 11.5 m/s?
If you require the wavelength of electron-beam for an electron microscope which is 10 times shorter than that in the part (a) what should be the energy of electrom beam? How can such energy be inparted to electrons beam?
What is the ratio of the final magnitude of the displacement to the total distance walked?
A heat engine utilizes a heat source at 460°C and has an ideal (Carnot) efficiency of 30%. To increase the ideal efficiency to 40%, what must be the temperature of the heat source?
A 2.4 mW laser beam has its electric field vertical. If it passes through a polarizer with its transmission axis at 30 degrees to the vertical, what's the power of the transmitted beam? Express your answer to two significant figures and include th
From a horizontal distance of 0.0540 m, a particle of mass 9.02 x 10-3 kg and charge -9.79 oC is fired with an initial speed of 84.2 m/s directly toward the fixed charge. How far does the particle travel before its speed is zero?
A 10-cm-diameter parallel-plate capacitor has a 1.0 mm spacing. The electric field between the plates is increasing at the rate 1.3 106 V/(m · s). What is the magnetic field strength at the following distances from the axis.
A child slides down a slide with a 29o degree incline, and at the bottom her speed is precisely one-fourth what it would have been if the slide had been frictionless. Calculate the coefficient of kinetic friction between the slide and the child.
The work done by the electric force as the test charge moves from surface A to surface B is WAB = -8.2 x 10-9 J. Find rB.
A car zooms around a curve (radius = 20 m) at a speed of 20 m/s. a. What is the centripetal acceleration of the car?
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