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(a) The total amount of charge entering a wire at time t is Q = (20 C) (1-exp(-t / 2sec)), where 0<t<10 is in seconds. Graph Q(t), find an expression for the current I(t), graph I(t) and find the time where the current is maximal. (b) Same as (a) for Q = (20 C) exp(-t / 2sec) (c) Which case may be related to the charging of a capacitor and which to the discharging of a capacitor? Why?
A Carnot engine has an efficiency of 0.361, and the temperature of its cold reservoir is 406 K. (a) Determine the temperature of its hot reservoir. (b) If 5950 J of heat is rejected to the cold reservoir, what amount of heat is put into the engine..
Evaluate with the strength of the earth's gravity at its surface, how much weaker is gravity at a distance of 10 earth's center.
1. what kind of image will you see through a convex lens? what factors might affect the size of the image?2. what
the girl(mass 40kg) is pulling the sled(mass 10Kg) on the frictionless ice. what is the acceleration of the girl
Two ships are moving along a line due east. The trailing vessel has a speed of 62.0 km/h relative to a land-based observation point, What frequency is monitored by the leading ship
Block A with mass 0.050 kg is released from rest at the rim of a frictionless hemispherical bowl that has radius R = 0.600 m. What is the speed of the combined object
A man pulls a crate of mass 75.0 kg across a level floor. He pulls with a force of 180.0 N at an angle of 26.0° above the horizontal. When the crate is moving, the frictional force between the floor and the crate has a magnitude of 130.0 N. If the cr..
An airplane is sent on a rescue mission to help a stranded explorer near the South Pole. The plane cannot land, but instead drops a supply package of mass m = 58 kg while it is flying horizontally with a speed of vp = 116 m/s. What is the mass of ..
A 1.4cm tall object is 4.0cm from a concave mirror. Ifthe image is 4.0cm tall, how far is it from the mirror
Two blocks are in contact on a frictionless table. A horizontal force F is applied to M2. find the magnitude of the contact force between the two blocks
a 10.5 uf capacitor is fully charged across a 18.0 v battery. the capacitor is then disconnected from the battery and
A projectile is launched straight up at 141m/s. How fast is it moving at the top of its trajectory? Presume it is launched upward at 45 degrees above the horizontal plane. How fast is it moving at the top of its curved trajectory.
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