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A 61.0 skier is moving at 6.15 on a frictionless, horizontal snow-covered plateau when she encounters a rough patch 3.55 long. The coefficient of kinetic friction between this patch and her skis is 0.350. After crossing the rough patch and returning to friction-free snow, she skis down an icy, frictionless hill 3.35 high. How fast is the skier moving when she gets to the bottom of the hill? How much internal energy was generated in crossing the rough patch?
A spherical mirror is polished on both sides. When the concave side is used as a mirror, the magnification is +2.3. What is the magnification when the convex side is used as a mirror
Lets say if Ahmad walked 6 steps east, 4 steps north, and then 3 steps east; how many steps did he walk
Select all true statements about electromagnetic waves.
The 3.90kg physics book shown is connected by a string to a 474.0g coffee cup. How far does the book slide before it has zero speed
The step-down transformer in a local neighborhood reduces the voltage from a 7,200 V line to 120 V. If there are 125 loops on the secondary, how many are on the primary coil
A charge of -6 nC is at the origin and a second charge of 11.0 nC is at x = 5.0m. Find the magnitude and direction of an electric field halfway in between the two charges.
Transverse waves with a speed of 42.5 m/s are to be produced on a stretched string. Calculate the wave speed in the string if the tension is 8.00 N
It is known that the electric force of repulsion between two electrons is much stronger than the gravitational attraction. For two electrons at a distance d apart, calculate the ratio of the size of the electrostatic repulsion to that of the gravi..
A model rocket launches with initial net upward accelration 1.5g (g is 9.8), This accelaration is maintained for 3 seconds. At what time does the rocket reach its maximum height
The current in a coil drops from 4.1 A to 2.4 A in 0.49 s. If the average emf induced in the coil is 12 mV, what is the self-inductance of the coil
A 25.0kg child plays on a swing having support ropes that are 1.80m long. How fast will she be moving at the bottom of the swing
A solid cylinder of mass m, radius r, and rotational inertia 0.5mr^2, starts at rest from the top of a ramp of height h. what would be the speed of the cylinder at the bottom
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