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Two 4 gram playing cards are balanced against each other, as shown. You find that you can incline the cards 22 degrees from the vertical before they slip on the table and fall flat.
What is the coefficient of friction between the table and cards?
If the angle from the vertical is only 15 degrees instead, what is the maximum vertical load (downward force exerted on the cards) that they can take without slipping? Assume that the force is applied at the tip, with half of it held by each card.
Bone has a Young's modulus of about 1.80*1010 Pa. Under compression, it can withstand a stress of about 1.55*108 Pa before breaking. Suppose that a femur (thigh-bone) is 0.44 m long, and Compute the amount of compression this bone can withstand befor..
a child rolls a 0.685kg basketball up a long ramp. the basketball can be considered a thin walled hollow sphere. find the maximum vertical height increase of the ball
A vacuum cleaner is plugged into a 120.0-V socket and uses 3.1 A of current in normal operation when the back emf generated with the electric motor is 77.0 V. Discover the coil resistance of the motor.
Find the kinetic energy of a 1400- satellite in a circular orbit about the Earth, given that the radius of the orbit is 1.20×104 miles. How much energy is required to move this satellite to a circular orbit with a radius of 2.70×104 miles?
How fast must a particle travel relative to an observer for its total energy to be double its rest-mass energy? If the particle is an electron, how much work (expressed in keV) is required to accelerate it from rest to 0.50c?
A Goodyear blimp typically contains 4250 m3 of helium (He) at an absolute pressure of 1.10 x 105 Pa. What is the mass (in kg) of the helium in the blimp
Two particles are fixed to an x axis: particle 1 of charge -1.12 x 10-7 C is at the origin and particle 2 of charge +1.12 x 10-7 C is at x2 = 19.6 cm. What is the magnitude of the net electric field
A fission-based nuclear bomb (such as those used in World War II) uses the same nuclear reactions, What is the average power Pavg of such a nuclear bomb
The hypotenuse of a right triangle measures 11.5. what are the lengths of the other two sides
A 50 ohm resistor and a 100mH inductor are connected in series with an ac generator of amplitudes 5.0V and a variable frequency. Find the peak voltages across the resistor and inductor
A coin is located 14.5 centimeter from the axis of a rotating turntable of variable speed. Find coefficient of static friction between turntable and coin
A 1.0 kg block of aluminum isheated at atmospheric pressure so that its temperature increasesfrom 22°C to 38°C. Find the change in internal energy of the aluminum
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