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Question: You pour 150 g hot coffee at 78.7°C and some cold cream at 7.50°C to a 115-g cup that is initially at a temperature of 22.0°C. The cup, coffee, and cream reach an equilibrium temperature of 56.0°C. The material of the cup has a specific heat of 0.2604 kcal/(kg°C) and the specific heat of both the coffee and cream is 1.00 kcal/(kg•C). If no heat is lost to the surroundings or gained from the surroundings, how much cream did you add?
I want you to explain the physics in this question.
The blackbody radiation emitted from a furnace peaks at a wavelength of 3.0 10-6 m (0.0000030 m). What is the temperature inside the furnace
A particle attached to a spring with k 50 N/m is undergoing simple harmonic motion, and its position is described by the equation x (5.7 m)cos(7.5t), with t measured in seconds.
A microwave oven is powered by a magnetron, an electronic device that generates electromagnetic waves of frequency 2.45 GHz. calculate the speed of the microwaves
A submerged scuba diver looks up toward the calm surface of a freshwater lake and notes that the Sun appears to be 32 degrees from the vertical. The diver's friend is standing on the shore of the lake.At what angle above the horizon does the friend s..
A person travels in a car with a speed of 90 m/s. To get the driver's attention, a stationary police officer behind the car shines his spotlight at the car. If the officer is 410 m behind the car when he turns on his spotlight, how long does it take ..
q1. a sling-thrower puts a stone 0.250 kg in the slings pouch 0.010 kg and then begins to make the stone and pouch move
question1a 6.8 g lead bullet travelling at 520 ms is stopped by a large tree. if half kinetic energy of the bullet is
Assume we have an infinitely long wire carrying a current of 4.0 A. It is bent into an L-shape extending into positive infinities along the x- and y- axes. Find out the magnitude of the magnetic field at the point P with coordinates (0.2 m, 0.2 m)..
A kicker punts a football from the very center of the field to the sideline 36 yards downfield. The magnitude of the net displacement of the ball is 46 yards. What is the direction of the net displacement of the ball
A 72 W light bulb with a resistance of 175 is connected to a power supply with a 119 V. What is the internal resistance of the power supply? Express the answer with one decimal place.
A 4.00-microF capacitor that is initially uncharged is connected in series with a 7.90-k ohm resistor and an emf source with E = 120 V and negligible internal resistance. what is the voltage drop across the resistor
Consider Joule's experiment described in the insight below. Assume the mass m = 2.2 kg and the fluid is water with a volume of 0.75 L. What is the increase in the temperature of the water
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