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You pour 250 g of tea into a Styrofoam cup, initially at 80°C and stir in a little sugar using a 100-g aluminum 20°C spoon and leave the spoon in the cup. Assume the specific heat of tea is 4180 J/kg⋅°C and the specific heat of aluminum is 900 J/kg⋅°C. What is the highest possible temperature of the spoon when you finally take it out of the cup?
question1consider an element of air in the standard atmosphere at a standard altitude of 1000 m. imagine that you
A 6 kg box is being pulled by a force F = 95 N at an angle of 54° from the horizontal. calculate the Work done by the external force
A horizontal incident beam consisting of white light passes through an equilateral prism. What is the dispersion (thetaV -thetaR) of the outgoing beam
A 0.2 kg object is suspended from a spring with a spring constant of K = 10 N/m. What is the potential energy of the system
questiona high-speed flywheel in a motor is spinning at 450 rpm when a power failure rapidly occurs. a flywheel has
An electron is accelerated horizontally from rest in a television tube by a potential difference of 25,000 V. At what angle will the electron be traveling after it passes between the plates
In a shuffleboard game, the puck slides a total of 12 m before coming to rest. what was the initial speed of the puck
A bowling ball (mass = 7.2 kg, radius = 0.15 m) and a billiard ball (mass = 0.32 kg, radius = 0.028 m) may each be treated as uniform spheres. What is the magnitude of the maximum gravitational force that each can exert on the other?
An engraver uses a magnifying glass (f = 8.80 cm) to examine some work, as in the drawing. What is the distance between the work and the magnifying glass
How many cm/s2 of acceleration should correspond to 1 unit of ramp slope if: •a graph of number of paper clips needed to maintain equilibrium vs. what would be the acceleration of the cart
A metal disk with a radius of 10cm and a mass of 6 kg has a hole in the center and is nailed to a wooden post. What is the moment of inertia of the disk
A large man sits on a four-legged chair with his feet off the floor. The combined mass of the man and chair is 95.0 kg. what pressure does each leg exert on the floor
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