Find out the acceleration of the car
A roller coaster car has a mass of 500 kg when fully loaded with passengers. If at point A, the force exerted by the track on the car is 15000 N. What is the acceleration of the car at point A?
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You discharge the capacitor through a 4.77-Ω resistor. What is the time constant? After what multiple of the time constant does the potential difference reach 2.47 V?
What is the maximum amount by which the wavelength of an incident photon could change when it undergoes Compton scattering from an atom or molecule with a 60.0 u mass? (1 u = 1.66 x 10-27 kg)."
A wire with a resistance of 7.1 Ω is drawn out through a die so that its new length is 3 times its original length. Find the resistance of the longer wire, assuming that the resistivity and density of the material are unchanged.
A spherical cavity of radius 4.50 cm is at the center of a metal sphere of radius 18.0cm. Determine the electric field at a point 6.0 cm from the center of the cavity.
During the measurement the phase of the sample changes from solid to liquid, and then from liquid to gas. The mass of the sample is 10g. What is the latent heat of vaporization of Xu in [J/kg]?
A 653 kg lift starts from rest. It moves upward for 2.8 s with constant acceleration until it reaches a cruising speed of 1.85 m/s. What is the average power of its motor during this period (in kW)?
The current is 13.4 A, and the energy required to cook one hot dog is 60.7 kJ. If the rate at which energy is supplied is unchanged, how long (in s) will it take to cook three hot dogs simultaneously?
A person doing a chin-up weighs 700 N, exclusive of the arms. During the first 25.0 cm of the lift, each arm exerts an upward force of 355 N on the torso. If the upward movement starts from rest, what is the person's velocity at that point?
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