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Problem: A 5.0 g ice cube at -20 degrees C is in a rigid, sealed container from which all the air has been evacuated.
A- How much heat is required to change this ice cube into steam at 200 degrees C?
Show all work, use additional paper if necessary.
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Question: The radius of the earth's very nearly circular orbit around the sun is 1.5x10^11m. Find the magnitude of the earth's velocity as it travels around the sun. Assume a year of 365 days. Find the magnitude of the e ...
Question: The potential energy U of an object of mass m that is separated by a distance R from an object of mass M is given by U = -GMm/R A. What is the kinetic energy K of the satellite? Express your answer in terms of ...
A car moves with a constant speed of 60 mph. What is the apparent weight of a 70 kg passenger when the car is at the bottom of a dip with a radius r = 100 m? m*g = N + (m*v*v/r) (70kg)(9.8) = N +(70kg)(26.82m/s)(26.82m/s ...
Question: A proton and an alpha particle are momentarily at rest at a distance r from each other. They then begin to move apart. Find the speed of the proton by the time the distance between the proton and the alpha part ...
Need help answering this question The ancient Egyptians used simple machines to build the pyramids. Discuss how you might use one or more of the simple machines to move the massive stone blocks up the growing pyramid, an ...
Quesiton: A rock is tossed straight up with a velocity of 20m/s When it returns, it falls into a hole 10 m deep. What is the rock's velocity as it hits the bottom of thehole? How long is the rock in the air, from the ins ...
Question: Oppositely charged parallel plates are separated by 5.31 mm. A potential difference of 600 V exists between the plates. (a) What is the magnitude of the electric field between the plates? N/C (b) What is the ma ...
Question: When striking, the pike, a predatory fish, can accelerate from rest to a speed of 3.9m/s in 0.12s . a) What is the acceleration of the pike during this strike? Express your answer using two significant figures. ...
A ball rolls off a table with a horizontal velocity of 5 m/s if takes 0.6 seconds for it to reach the floor a) what's the vertical component of the ball's velocity just before it hits the floor b) what's the horizontal c ...
Question: Tectonic plates are large segments of the earths crust that move slowly. suppose that one such plates has an average speed of v=2.1 cm/ year. a) What distace d, in meters, does the plate move 1.4 seconds at thi ...
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