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A child complains that her 160 g of milk is too hot at 90 degree C. She then pour 80 g of cold milk at 7 degree C in it. If the specific heat of milk is 3800 J/kg.K, what is the temperature of the mixture?
A cube of copper with each edge having the dimension 12.7 mm, is put in a vise and squeezed by a force of 215 N exerted by either side of the vise. What is the stress in the copper cube
One of the moons of a planet orbits at a distance of 9375 km from the center of the planet. what is the period of the moon
The angular position of a point on the rim of a rotating wheel is given by %u03B8 = 4.01t - 6.34t2 + 2.63t3, What are the angular velocities at t = 3.19 s and t = 6.06 s
Suppose you have a spherical balloon filled with air at room temperature and 1.0 atm pressure; its radius is 11 cm. what's the balloon's new radius
You have three resistors with values 3.7?, 2.8?, 5.1?, and a battery of 3.6V. You begin by connecting the three resistors in parallel, What is the magnitude of the current in the 2.8 resistor
A bullet of mass m is fired into a hanging wood block of mass M and pendulum length L. The block, with the bullet embedded, swings up to the point the angle with the vertical ?. Calculate the speed with which the bullet made contact with the block,
Suppose that a particle accelerator is used to move two beams of particles in opposite directions, what is the magnitude of the average current in this region
An object is determined to have an apparentm mass of 882 g in air and 643 g when immersed in water. What is the density of the object
A 51kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 250N. For the first 10.5m the floor is frictionless, and for the next 10.5m the coefficient of friction is 0.18. What is the final speed of the crate af..
Mary Healy, the young woman with severe vaginal bleeding, is admitted to emergency room. She is three months pregnant, and physician is concerned about the volume of the blood she is losing.
An electric power station is producing 1.60 × 103 W of power that is to be sent to a small town located 11 km away, Find the power lost in heating the wires if the voltage is stepped up from 130 V to 1400 V
A cubic meter of copper has a mass of 8930kg. The block of copper is lowered into a lake by a strong cable until the block is copletely submerged
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