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A 500.0 g pot of water at room temperature (20.0C) is placed on a stove. How much heat is required to change this water to steam at 100C?
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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. ...
Calculate the momentum of a 2100 kg elephant charging a hunter at a speed of 7.50 m/s. kg·m/s Compare the elephant's momentum with that of a 0.0400 kg bullet fired at a speed of 600 m/s. (momentum of elephant / momentum ...
Question: The starter motor of a car engine draws an electric current of 110 A from the battery. The copper wire to the motor is 4.20 mm in diameter and 1.73 m long. The starter motor runs for 0.95 s before the car engin ...
Question: A certain brand of freezer is advertised to use 880 kW*h of energy per year. A) Assuming the freezer operates for 6 hours each day, how much power does it require while operating? B) If the freezer keeps its in ...
Question: A speed skater moving across frictionless ice at 9.2 m/s hits a 5.0 m wide patch of rough ice. She slows steadily, then continues on at 5.8 m/s. What is her acceleration on the rough ice? The response must be t ...
Question: A real image is four times as far from a lens as is the object. What is the object distance, measured in focal lengths? The response must be typed, single spaced, must be in times new roman font (size 12) and m ...
Question: Suppose the free-fall acceleration at some location on earth was exactly 9.8000 m/s^2. What would it be at the top of a 1000 -tall tower at this location? The response must be typed, single spaced, must be in t ...
Question: A student is working in an optics lab and has a light bulb which is 90 cm from a screen. She needs to make a real image of the bulb on the screen and she has a positive lens with a focal length of 12.5 cm. Find ...
Question: A point charge with charge q_1 is held stationary at the origin. A second point charge with charge q_2 moves from the point (x1, 0) to the point (x2, y2). How much work W is done by the electrostatic force on t ...
A projectile is fired at ground level with an initial speed of 36 m/s, at an angle of 34 degrees above the horizontal. It hits a target above the ground 2.4 seconds later. What is the horizontal distance in meters, from ...
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