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A 1250-kg elevator starts from rest. It moves upward for 4.00 seconds with constant acceleration until it reaches its cruising speed of 3.50 m/s. What is the average power of the elevator motor during this 4.00 second interval (ignoring friction).
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1) Evaluate (5.0000 * 10^7)(3.80 * 10^-16). Report 2 decimals for result 2) 1,400 kg car moving at 7.0 m/s is stopped by action of it braces. The work done by the car braces is .....Joules. Response in 2 decimals. 3) The ...
Question: The planet Mercury's surface temperature varies from 700 K during the day to 90 K at night. Part 1: What is the temperature in °C during the day? Part 2: What is the temperature in °C at night? Part 3: What is ...
A hiker measures the angle of elevation to the top of a cliff as 16.0o. She walks 1.20 km further away from the cliff on level ground, she finds the angle to be 11.0 o. a) Draw a diagram of the problem - you may ignore t ...
Question: In one of the classic nuclear physics experiments at the beginning of the 20th century, an alpha particle was accelerated towards a gold nucleus and its path was substantially deflected by the Coulomb interacti ...
Question: Standing waves on a wire are described by y(x,t)=(ASWsinkx)sin?t, with ASW = 3.00mm , ? = 975rad/s , and k = 0.790?rad/m . The left end of the wire is at x = 0. Part A: At what distances from the left end are t ...
Question: A thin, horizontal, 20-cm-diameter copper plate is charged to 4.0 nC . Assume that the electrons are uniformly distributed on the surface a) What is the strength of the electric field 0.1 mm above the center of ...
Question: The particle travels along the path defined by the parabola y = 0.5x2. If the component of velocity along the x axis is vx = (7t) ft/s, where t is in seconds, determine the particle's distance from the origin O ...
Question: Suppose the emf generated by a coil rotating in a magnetic field is zero at t=0, and increases to its first peak at t0=0.11ms. A) What is the angular velocity of the coil in rad/s? B) At what time (relative to ...
Question: The position of a 2.75 x 10 5 N training helicopter under test is given by r? = (0.020 m/s3) t3i^ + (2.2m/s)tj^ ?(0.060m/s2)t2k^. Part A: Find the net force on the helicopter at t = 5.0s. Express your answer in ...
The amount of chemical energy released in burning heating oil is approximately 130 MJ per gallon. This is the amount of energy released as heat during combustion. (a) Suppose that during the winter, heating a home with o ...
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