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A pendulum of length 130 cm swings with an amplitude of 1.6 cm. Its mechanical energy is 5.0 mJ. What is the mechanical energy of the same pendulum when it swings with an amplitude of 3.7 cm?
mJ
In a new (inelastic) collision, the same two bumper cars with the same initial velocities now latch together as they collide. What is the final speed of the two bumper cars after the collision
A jetliner has a mass of 2.8 x 105 kg and flies at a speed of 190 m/s. If the speed of light in a vacuum had a hypothetical value of 350 m/s, what would be the magnitude of the jetliner's momentum
A screen is placed 42.7 cm from a single slit that is illuminated with light of wavelength 677 nm. If the distance between the first and third minima in the diffraction pattern is 3.45 mm, what is the width of the slit.
On an essentially frictionless, horizontal ice rink, a skater moving at 4.1 m/s encounters a rough patch that reduces her speed by 49% due to a friction force that is 26% of her weight. find the length of this rough patch
Two equal point charges of magnitude 4.0 µC are situated along the x-axis at x1 = -2.0 m and x2 = -2.0 m. What is the electric potential energy of this system of charges
q1. a power supply passing throughout a resistor is supposed to deliver 22-v dc at a max current of 150ma. the
Julie throws a ball to her friend Sarah. The ball leaves Julie's hand a distance 1.5 meters above the ground with an initial speed of 19.0 m/s at an angle 48.0 degrees; What is the vertical component of the ball's velocity right before Sarah catche..
If the x- and y- components of a vector of 6.0 m at 45 degrees are tripled what is the magnitude of a new vector and what is the direction
Consider a solid metal conductor in static equilbrium. What is the electric field inside the conductor
An RLC circuit consists of a 170 resistor, a 21.0 µF capacitor, and a 510 mH inductor, compute the phase angle between the current and the applied voltage
A puck slides on a surface for 5.6 m before it stops. If it was moving at a velocity of 15 m/s and has a mass of 1.2 kg, what is the force of friction exerted on the puck
A uniform stick d = 1 m long with a total mass of 251 g is suspended vertically from a frictionless pivot at its top end. A wad of putty of mass 20 g is moving horizontally with speed v. It strikes and sticks to the stick at a distance 0.75 m from..
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