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A 50.0 g silver spoon at 20.0 °C is placed in a cup of coffee at 90.0 °C. How much heat does the spoon absorb from the coffee to reach a temperature of 89.0 °C?
Find what will be the refractive index and critical angle of a material in which the speed of light is twice than the speed of light in diamond
The force of the wind on the sails of a sailboat is 410 N north. The water exerts a force of 240 N east. If the boat (including crew) has a mass of 330 kg, illustrate what are the magnitude and direction of its acceleration?
A small electric immersion heater is utilized to heat 170 g of water for a cup of instant coffee. The heater is labeled "200 watts", which means that it converts electrical energy to thermal energy at this rate. Compute the time required to bring thi..
a 45.7 kg girl is standing on a plank that has a mass of 152 kg. the plank originally at rest is free to slide on a
Light waves are electromagnetic waves that travel at 3.00 108 m/s. The eye is most sensitive to light having a wavelength of 5.50 10-7 m. (a) Find the frequency of this light wave. Hz (b) Find its period. s
A charge of +1 coulombs is placed at the 0 cm mark of a meter stick. A charge of +4 coulombs is placed at the 100 cm mark of the similar meter stick.
a batter hits a fly ball which leaves the bat 0.88m above the ground at an angle of 62 with an initial speed of 29m/s heading toward centerfield. how far from home plate would the ball land if not caught
An ant travels in a perfectly straight line in the –x direction some distance. It turns, and then travels some new displacement, 30.0 degrees above the +x axis, again, in a straight line, for some distance. The final leg of its little ant journey is ..
A long aluminum rod is struck at one end. At the other end an observer close to the rod, hears the sound of the blow twice, What is the length of the rod
Illustrate what are the possible weaknesses in the Kimberely Process? Illustrate what role do you think the three sectors will have in addressing these weaknesses?
A ball is thrown horizontally from the top of a 60.0-m building and lands 100.0 m from the base of the building. Ignore air resistance. What must have been the initial horizontal component of the velocity
There are two weights hanging from a pulley, one on the ground (3.00 kilogram) and one hanging (5.00 kilogram). Determine the speed of the other pulley when the 5 kilogram pulley hits the ground
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