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A skater holds her arms outstretched as she spins at 170 rpm. What is the speed of her hands if they are 155 cm apart?
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Why do many people believe they must choose between science and religion?
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Estimate the number of electrons present in a (neutral) 1.2 kg block of carbon.
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while a car travels around a circular track, at constant speed, its
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To win the game, a place kicker must kick a football from a point 38 m (41.5568 yd) from the goal, and the ball must clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground with a speed of 21 m/s at an angle of 40.9 from the horizontal. The acceleration of gravity is...
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Galactic Motion How fast is a galaxy moving relative to Earth if a hydrogen spectral line of 486 nm is red-shifted to 491 nm?
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suppose a snack bar is burned in a calorimeter and heats 2000g water by
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determine the force needed to accelerate a 1357 kg car foward at 8.0 m/s2
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what is a vigina?
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A 2.25 104 elevator is to be accelerated upward by connecting it to a counterweight using a light (but strong!) cable passing over a solid uniform disk-shaped pulley. There is no appreciable friction at the axle of the pulley, but its mass is 850 and it is 1.50 in diameter. a)How heavy...
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- The Earth’s rate of rotation is constantly decreasing, causing the day to increase in duration. In the year 2000 the Earth takes about 0.548 s longer to complete 365 revolutions than it did in the year 1900.
- (a) What is the average angular acceleration of the Earth?
- (b) If this average acceleration remains constant, in what year will the Earths rotation come to rest?
- 2. I do not understand this Ideal Gas Law and Kinetic Theory question. Can you help me set it up?
- A spherical balloon is made from a material whose mass is 3.00-kg. The thickness of the material is negligible compared to the 1.5-m radius of the balloon. The balloon is filled with helium (He) at a temperature of 305-degrees K and just floats in the air, neither rising nor falling. The density of the surrounding air is 1.19-kg/m^3. Find the absolute pressure of the helium gas
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