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An astronaut on a distant planet wants to determine its acceleration due to gravity. The astronaut throws a rock straight up with a velocity of + 20.0 m/s and measures a time of 28.6 s before the rock returns to his hand. What is the acceleration due to gravity on this planet? (positive = up, negative = down)
Water is pumped into a storage tank from a well delivering 25.0 gallons of water in 30.0 seconds through a pipe of 1.00 in.^2 cross sectional area. What is the average velocity of the water in the pipe as the water is pumped from the well?
A laser beam is incident at an angle of 34.0° to the vertical onto a solution of corn syrup in water. If the beam is refracted to 25.44° to the vertical, what is the index of refraction of the syrup solution? Assume the light is red, with wavelength ..
A race car is moving with a velocity of 144 kilometers/hour. The driver applies the brakes, and the car comes to a halt in 12.0 seconds. What is the acceleration of the car after 12.0 seconds? A. -12 m/s^2 B. -3.3 m/s^2 C. 3.3 m/s^2 D. 10.3 m/s^2
A hypothetical nucleus weighs 1 \({\rm lb}\). What is the radius of this nucleus
On vacation, your 1250 kg car pulls a 540 kg trailer away from a stop light with an acceleration of 1.75 m/s2. What is the net force exerted on the trailer
Take the questionnaire of Psychology and Your Life. Are you more consistent with right or left brain orientation? How will your strengths help you with your future goals.
The surface temperature of the start Betelgeuse is 3500K. Assume Betelgeuse radiates as a perfect blackbody. what is the energy of each of these photons
A 36%-efficient electric power plant produces 900 MW of electric power and discharges waste heat into 20^\circC ocean water. Suppose the waste heat could be utilized to heat homes during the winter instead of being discharged into the ocean. A typica..
If a projectile is launched vertically from the Earth with a speed equal to the escape speed, how far from the Earth's center is it when its speed is 1/6 of the escape speed
A well-insulated electric water heater warms 111 kg of water from 20.0° C to 43.0° C in 29.0 min. Find the resistance of its heating element
a youngs double-slit interference experiment gives bright fringes separated by 30.5 cm on a screen when the experiment
a water tank in the shape of a circular cone has a base radius of 8 ft. and a height of 9 ft. and is supported is such
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