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A water dispenser for pets has an inverted plastic bottle. When acertain amount of water is drunk from the bowl, more water flowsautomatically from the bottle into the bowl. The bowl neveroverflows. Explain the operation of the dispenser. Does the heightof the water in the bottle depend on the surface area of the waterin the bowl?
An 840 kg car needs to round a level curve with a radius of 23m.The driver wants to proceed at 56 kph. How much work does the friction force do on the car
A person undergoing radiation treatment for a cancerous growth receives an absorbed dose of 1.8 Gy. All the radiation is absorbed by the gowth. Determine the rise in temperature
a positron is a particle with the same mass and magnitude charge as an electron, but a positron has a positive charge. what is the system's total kinetic energy
A 0.600 kg ball falls directly down onto concrete, hitting it with a speed of 13.5 m/s and rebounding directly upward with a speed of 3.00 m/s. What is the impulse on the concrete
A circular loop of conducting wire is placed in a magnetic field of 0.45T while the free ends of the wire are attached to a 30ohm resistor. What are the magnitude and direction of the current in the resistor
q1. oxygen o2 gas within a piston-cylinder assembly undergoes an expansion from a volume v1 0.02 m3 to volume v2 0.03
A log floats in a river with 1/5 of its volume above the water. Density of water is 1000 kg/m, how much of the volume is now above the water
A 9 turn coil 1.80 in diameter is rotated at 11 about an axis perpendicular to a uniform magnetic field. A voltmeter connected to the coil through rotating contacts reads a peak value of 340.
A toy car is driven by a battery of 9 V. It draws a current of 2mA. What is the resistance of the toy car
q1. while a roofer is working on a roof that slants at 44.0 above the horizontal he accidentally nudges his 93.0
Find out the force each hand exerts on the shaft when the shaft is rotating in the horizontal plane about its center at 5×10-2 {rm rev/s}.
A 6kg block, starting at rest, is pulled up a ramp by a motor coiling a rope such that the tension is 60N. How much energy is supplied by the motor to move the block up the ramp
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