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A coffee drinker is faced with the subsequent dilemma. She is not going to drink her hot coffee with cream for ten minutes, however wants it to still be as hot as possible. Is it better to immediately add the room-temperature cream, stir the coffee, and let it sit for ten minutes, or is it better to let the coffee sit for ten minutes and then add and stir in the cream? Which results in a higher temperature after ten minutes? Utilize your Temperature Probe to examine this dilemma. Describe your results in terms of the assumptions Newton made about cooling.
What is the direction of the electric field along the positive zsemi-axis (vertical) if the field is created by: a uniformly charged circle in the x-y plane with the center atthe origin; a uniformly positively charged wire along the x axis;
A slingshot will shoot a 10-g pebble 22.0 mstraight up. How much potential energy is stored in the slingshot's rubber band
An electromagnetic wave in a vacuum has an instantaneous magnetic field strength of 0.000000740 T at a certain point. What is the instantaneous electric field strength of the wave
four equal positive point charges each of charge -14 c are at the corners of a square of side 12cm.what charge should
The storage of radioactive waste is a massive problem in the nuclear industry. One problem that scientists must take into account is volumetric expansion. Consider a 25.0-gallon metal canister of diameter 22.0 inches filled with a radioactive wast..
a cat is laying in front of a convex lens in such a way that his body is aligned to the optical axis of the lens its
A mass is attached to the end of a spring and set into oscillation on a horizontal frictionless surface by releasing it from a stretched position of x = +0.150 m. find maximum speed of the oscillating mass
Explain what are the priorities: more charges or more energy stored in batteries used to propel cars or even light planes. What are the current limitations
A 78 kg diver steps off a 11 m tower and drops from rest straight down intothe water. If he comes to rest 4.3 mbeneath the surface, determine the average resistance force exertedon him by the water.
A winter hiker's body generates heat at a rate up to an utmost value of 126 W. She is hiking on a brisk day in which the outdoor temperature is 9 °C, whilst wearing a jacket with goose down insulation.
A block of mass M hangs from a spring having spring constant k = 12 N/m and oscillates up and down with simple harmonic motion. What is the maximum speed of the block
A 0.120-kg, 50.0-cm-long uniform bar has a small 0.055-kg mass glued to its left end and a small 0.110-kg mass glued to the other end. How far from the left end should the fulcrum be placed
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