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A roller coaster car of mass 1102 kg slides on a frictionless track starting at a distance 19.2 m above the bottom of a loop 15 m in diameter. The acceleration of gravity is 9.81 m/s2 If friction is negligible, what is the magnitude of the force of the track on the car when the car is at the top of the loop? Answer in units of N.
Define equivalent resistance. Derive expressions for equivalent resistances for series and parallel arrangement of resistances.
A child slides down a slide with a 30 degree incline, and at the bottom her speed is precisely two-thirds what it would have been if the slide had been frictionless. Find coefficient of kinetic friction between slide and child
A dolphin in seawater at a temperature of 25 °C makes a chirp. How much time passes before it hears an echo from the bottom of the ocean, 208 m below.
On a distant planet, golf is just as popular as it is on earth. On the distant planet, what is the maximum height of the ball
A diffraction grating with 330 {rm lines/mm} is 1.00 {rm m} in front of a screen. What is the wavelength of light whose first-order maxima will be 17.0 {rm cm} from the central maximum on the screen.
Two tugboats pull a disabled super tanker. Each tug exerts a constant force of 1.20×106 \rm N, one at an angle 19.0^\circ west of north, and the other at an angle 19.0^\circ east of north, as they pull the tanker a distance 0.670 \rm km toward the no..
Demonstrate the concepts pertinent to this problem. A 1.60-cm-high object is situated 20.6 cm in front of a concave mirror that has a radius of curvature of 13.1 cm. Compute (a) the location and (b) the height of the image.
A plate carries a charge of -3.8 µC, while a rod carries a charge of 3.3 µC. How many electrons must be transferred from the plate to the rod, therefore that both objects have the same charge?
A parallel circuit has a 15 ohm and 24 ohm bulb in each parallel branch and a 15 ohm resistor and 293 volt battery in series with the parallel bulbs. What is the current in the 15 ohm bulb, 24 ohm bulb, and 15 ohm resistor
A charged isolated metal sphere of diameter 24.0 cm has a potential of 7400 V relative to V = 0 at infinity. Calculate the energy density in the electric field near the surface of the sphere.
An electron traveling at 812 m/s enters a5.7 T magnetic field. The angle betweenthe velocity and the field is 83o. Find the radius of the resultingcircular path.
What would be the equilibrium temperature when a 227 block of copper at 265 is placed in a 155 aluminium calorimeter cup containing 844 of water at 14.50.
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