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You're burning calories by weight lifting. You lift a 65kg barbell 1.7m, and repeat 10 times.
A. How much energy in do you expend?
B. How much energy in CaI do you expend?
The school bus picks up Brian in front of his house and takes him on a straight-line 3.4 km bus ride to school in the positive direction. what is the position of the school
A horizontal block-spring system with the block on a frictionless surface has total mechanical energy E = 42.3 J and a maximum displacement from equilibrium of 0.259 m, Find the potential energy stored in the spring when x = 0.160 m
A dipole consist Of two charges Of opposite sign And each charge has a magnitude 7.20E-18C. compute the magnitude of the torque(in newton-meters) on the dipole
An aircraft has a lift-off of 120km/h. (a) What minimum constant acceleration does the aircraft require if it is to be airborne after a takeoff run of 240m (b) How long does it take the aircraft to become airborne
A circular area with a radius of 7.80cm lies in the x-y plane. What is the magnitude of the magnetic flux through this circle due to a uniform magnetic field B = 0.229T that points in the +z direction
(a) Determine the sound intensity at each of the three patches. (b) The sound power that passes through each of the patches is 2.00 10-3 W. Find the area of each patch.
An airplane flies horizontally with speed 1000km/h(280m/s) an engine falls it takes 30s to gets to the ground. neglect air resistance elucidate the airplane is 4.5km high?.
A 2,000 m wide river has a current of vector(v) = 2 i m/s. A boat which has a maximum speed of 5m/s with respect to the river, What is the velocity of the boat with respect to the bank
A stiff, 15cm -long tube with an inner diameter of 2.5mm is attached to a small hole in the side of a tall beaker. What is the volume flow rate through the tube
Consider an alternating current of the form i(t) sin(2pit), where t is the time elapsed measured in seconds. (a) at what times is the magnitude of the current largest? (b) if this current were applied to a resistor, at what times would the magnitude ..
The small spherical planet called "Glob" has a mass of 6.54×10^18 kg and a radius of 6.29×10^4 m. An astronaut on surface of Glob throws a rock straight up. The rock reaches a maximum height of 2.00×103 m, above the surface of planet, before it falls..
A wheel initially rotating at an angular speed of 1.4 rad/s turns through 30 revolutions during the time that it is subject to an angular acceleration of 0.40 rad/s2
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