Change in thermal energy of the megan
Megan's mass is 26 kg. She starts from rest at the top of a 4.8 m tall slide and reaches a velocity of 5.1 m/s at the bottom of the slide. What is the change in thermal energy of the Megan/earth/slide system?
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A converging lens (f = 13.0 cm) is held 7.30 cm in front of a newspaper, the print size of which has a height of 1.90 mm. Find (a) the image distance (in cm) and (b) the height (in mm) of the magnified print?
A force stretches a wire by 0.60mm. A third wire of the same material has the same length and twice the diameter as the first. How far will it be stretched by the same force?
Two small spheres spaced 40.0 cm apart have an equal charge. How many excess electrongs must be present on each sphere if the magnitude of the force of repulsion between them is 5.37x 10^-21 newtons?
Describe the effects of an unmotivated workforce on a company. How does Tesco benefit from ensuring that its workforce is motivated?
Compare what you would expect to see in the classroom from each age group in terms of expected reading and writing development. How might this influence which reading and writing activities you would assign? What could you do to strengthen a student'
A peg is located a distance h directly below the point of attachment of the cord. If h = 0.70 L, what will be the speed of the ball when it reaches the top of its circular path about the peg? (Use the following as necessary: g and L.)
Jane's mass is 20 kg. She starts from rest at the top of a 5 m tall slide and reaches a velocity of 5 m/s at the bottom of the slide. What is the change in thermal energy of the Lily/earth/slide system?
A humanitarian aid package is dropped from a plane flying horizontally 500 m above the ground with a speed 100 m/s. What is the speed of the package at the time of impact? (Calculate the total speed, not a horizontal or vertical projection.)
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