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A playground merry-go-round of radius R = 1.20 m has a moment of inertia I = 265 kg · m2 and is rotating at 12.0 rev/min about a frictionless vertical axle. Facing the axle, a 27.0-kg child hops onto the merry-go-round and manages to sit down on the edge. What is the new angular speed of the merry-go-round?
Charge Q = 10E-8 C is placed in the origin. Location A is -3.00m from the charge while location B is 2.00m from the charge.A) Find the potential difference VB - VA between the two points. B) Which point is at the higher potential? Type either "Poi..
A 144-g baseball moving 29m/s strikes a stationary 5.25-kg brick resting on small rollers so it moves without significant friction. Determine the baseball's speed after the collision
A wave on a string is described by the equation y = (4.2 mm)cos(3000t 0.45x) where t is measured in s and x is measured in mm
A light bulb at point x in the frame of reference O blinks on and off at intervals, ?t = t2 - t1. Use the expressions for the Lorentz transformations to derive the expression for the time dilation relations ?t and ?t'
Two lenses, one converging with focal length 20.5cm and one diverging with focal length ?10.5cm , are placed 25.0?cm apart. Determine the magnification of the final image formed
The bullet remains in the block, and after the impact the block lands d = 2.2 m from the bottom of the table. Identify the initial speed of the bullet.
A parachutist and her parachuting equipment have the combined mass of 121 kg. Her terminal velocity is 5.30 m/s with the parachute open. Her parachute has a cross-sectional area of 35.80 m^2. The density of air at that altitude is 1.23kg/m^3. What is..
A force with a magnitude of 452N is used to bring an object with a mass of 56.0 kg moving at a velocity of 155m/s. How long will it take to bring the object to a full stop.
Calculate the number of electrons in a steel (iron) pinhead. The pinhead may be assumed to be spherical with diameter 2 mm
High-altitude mountain climbers do not eat snow, but always melt it first with a stove. Calculate the energy absorbed from a climber's body if he eats 0.70kg of -15?C snow which his body warms to body temperature of 37?C
A horizontal force of magnitude 34.5 N pushes a block of mass 4.09 kg across a floor where the coefficient of kinetic friction is 0.609. During that displacement, the thermal energy of the block increases by 39.3 J. What is the increase in thermal ..
A galvanometer whose full scale current is 150amps and coal resistance is 75ohms is used with a 1.50 ohms shunt resistor to make an ammeter. what is the largest current that can be measured by the ammeter.
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