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A girl with a mass of 60kg springs from a trampoline with an initial upward velocity of 8.0 m/s. At height 2.0 meters the trampoline, the girl grabs a box with a mass of 15kg. The velocity before she grabs the box is 4.98 m/s. and the velocity after she grabs the box is 3.98 m/s
a) what is the maximum height that the girl (with box) reaches? Measure hmax with respect to the top of the trampoline
If a curve with a radius of 85 is perfectly banked for a car traveling 71 , what should be the coefficient of static friction for a car not to skid when traveling at 86.
What mass (in grams) of steam at 100°C should be mixed with 212 g of ice at its melting point, in a thermally insulated container, to produce liquid water at 14.0°C? The specific heat of water is 4186 J/kg·K. The latent heat of fusion is 333 kJ/kg..
A 24.0V battery is in series with a switch, a 0.30Hinductor, and a 24? resistor. Find the potential differences across the inductor at t=3
A source emits sound uniformly in all directions. There are no reflections of the sound. At the distance r1 from the source the sound is 3.9 dB louder than it is at a distance r2 from the source. What is the ratio r1/r2.
The threshold of dark-adapted (scotopic) vision is 6 multiplied by 10-11 W/m2 at a central wavelength of 550 nm. If light with this intensity and wavelength enters the eye when the pupil is open to its maximum diameter of 7.5mm, how many photons p..
Now a peg is placed 4/5 of the way down the pendulum's path so that when the mass falls to its vertical position it hits and wraps around the peg. As it wraps around the peg and attains its maximum height it ends a distance of 3/5 L below its startin..
A 3.40 g coin is positioned 16.0 cm from the center of a turntable. The coin has static and kinetic coefficients of friction with the turntable surface of mu_s = 0.720 and mu_k = 0.480. What is maximum angular velocity with which the turntable can sp..
A 3.70g bullet moving at 250m/s enters and stops in an initially stationary 3.50kg wooden block on a horizontal frictionless surface, How much work was done in stopping the bullet
A solenoid has a cross-sectional area of 2.20 10-4 m2, consists of 200 turns per meter, and carries a current of 0.56 A. Find the average current induced in the coil
Jupiter has mass M, radius R and orbital period T, while the Sun has mass m, radius r and orbital period t. Calculate the ratio of the centrifugal acceleration to the gravitational acceleration at the equator of
What is the total negative charge, in coulombs, of all the electrons in a small 1.05{\rm g} sphere of carbon? One mole of C is 12.0{\rm g} , and each atom contains 6 protons and 6 electrons.
Tritium (3H) decays by negative beta decay with a half-life of 12.16 years. Use an atomic weight. What is the mass in g of 1 mCi of tritium? 3.026 For 3H.To what nucleus does 3H decay.
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