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Betty weighs 408 Newton. She is sitting on a playground swing seat that hangs 0.41 meter above the ground in its rest position. Her initial speed is zero and her initial height above the ground is 1.55 meter. At some later time her speed is 1.05 m/s and her height above the ground is 0.95 meter. The acceleration of gravity is 9.8 m/s2.
Find the magnitude of the work done by friction during this time?
Answer in units of J.
A charged cork ball of mass 1.26 gram is suspended on alight string in the presence of a uniform electric field. Find what is the charge on the ball
An electron enters a region of a uniform electric field (E= 50 N/C) with an initial velocity of 40Km/s directed the same as the electric field. what is the speed of the electron 1.5ns after entering this region?
A krypton laser produces a cylindrical red laser beam 2.0 in diameter with 5.0 of power. What is the light intensity on a wall 2.2 away from the laser
Steam is expanded from 12.5 MPa and 900 degrees Celsius to 0.30 MPa, 400 degrees Celsius in an adiabatic turbine. Determine the isentropic efficiency of this turbine
A barbell spins around a pivot at its center at A. The barbell consists of two small balls, each with mass 450 grams (0.45 kg), Calculate the moment of inertia I of the barbell
kids at a swimming hole swing over the water on a tire swing essentially a simple pendulum and then drop in the water.
A particular satellite was placed in a circular orbit about 161 mi above Earth. Determine the orbital speed of the satellite
During gym class, a 50-kg teenager runs at 8.0 m/s along the floor toward a rope hanging 7.8 m from the ceiling. What is the tension in the rope at the moment he begins to swing upward
the masses of the earth and moon are 5.98 x 1024 and 7.35 x 1022 kg respectively. identical amounts of charge are
A wire is formed into a circle having a diameter of10.7cm and is placed in a uniform magnetic field of3.16mT. Find the maximum torque on the wire
What is different between VHDL programs for Mealy machines and Moore machines? a. CASE statements are used in Mealy machines, but not in Moore machines. b. IF statements are used in Moore machines, but not Mealy machines.
You swing a 2.60 stone in a circle, using the full length of a thin 80.0 rope. At what speed should you swing it so its acceleration will be 9.8
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