Master Physics with Fun Quizzes & Brain Teasers!

A baseball player leads off the game and hits a long home run. The ball leaves the bat at an angleof 30.0 from the horizontal with a velocity of 40.0 m/s. How far will it travel in the air?
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A circular loop of wire with a diameter of 21.475 cm is in the horizontal plane and carries a current of 3.917 A counterclockwise, as viewed from above. What is the magnetic field, in microTeslas, at the center of the loop?
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A 3 kg cart moves due east at 17m/s collides with a 5 kg cart moving due west. What is the initial speed of the 5 kg if the they stick together and come to rest.
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As a roller coaster car crosses the top of a 60-m-diameter loop-the-loop, its apparent weight is the same as its true weight. What is the car's speed at the top?
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Which one of the following pictures shows a convex lens?Select one:a. Ab. Bc. Cd. D
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Nucleus A decays into the stable nucleus B with a half-life of 14.19 s. At t=0 s there are 1,891 A nuclei and no B nuclei. At what time will there be 832 B nuclei?
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If you drop a 2.5kg ball that initially has 32J of potential energy, how much potential energy will it have before it hits the ground? Round your answer to the nearest whole and include the appropriate unit
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Please give me an easy to study experiment on this topic.
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What are substations for in an electrical grid?Select one:a.to change the voltage from the main linesb.to distribute electricity from the main linesc.to serve as backup is another substation is damagedd.all of the above
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A rope holds a 25-kg rock at rest on a frictionless inclined plane as shown. Determine the tension in the rope.
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I need help with this question Part a and Part b
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What is the force of gravity between an object that has a mass of 2,800,000 kg and another mass of 17,000,000 kg which are only 0.01 m apart?
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A vector points -43.0 unitsalong the x-axis, and 11.1 unitsalong the y-axis.Find the direction of the vector.Y
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Questions 14 - 16A small plane takes off at a constant velocity of 175 km/h at an angle of 35.5. At 48.0 S.Question 14What is the velocity of the plane in m/s?Round your answer to 3 significant figures,Question 15How far has its shadow traveled from liftoff along the ground ? Assume the sun is directly above the plane.
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An impulse of 20,000 N*s is applied to a car, bringing it to a stop in 0.17 seconds. What force was applied to the car?
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What distance will a bicyclist cover in 25 seconds if he pedals with an acceleration of 2.5 meters/sec/sec?
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You Toss a ball upward at 30.0m/s. How much time will it take to reach the top of its path?
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A uniform square of length L = 80 cm has a force F = 60 N applied at one corner parallel to one side of the square. What torque does this produce about the center of the square?
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Alan hits a hockey puck of mass 0.3kg across a hockey rink with a speed of 23m/s to the south
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An astronaut standing on the Mars drops a brick. If the brick falls 12m vertically in 3.1s,what is its acceleration?
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Which of the following is accurate when discussing specific heat?Question 7 options:A) The specific heat of a gas can be measured at constant volume.B) Specific heat values for liquids will never vary for different ranges of temperature.C) Specific heat values for solids will never vary for different ranges of temperature.D) The specific heat of a gas can be measured at constant pressure.
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If a room causes reverberations, it has poor acoustics.TrueFalse
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Three point charges are arranged at the corners of a square of side l as shown in the figure. (Figure 1) What is the potential at the fourth corner (point A), taking V=0at a great distance?Give your answer in terms of Q, l, and the appropriate constants.
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While an elevator of mass 2325 kg moves upward, the tension in the cable is 38.8 kN. Assume the elevator is supported by a single cable. Forces exerted by the guide rails and air resistance are negligible.What is the acceleration of the elevator? If the acceleration is in upward direction, enter a positive value and if the acceleration is in downward direction, enter a negative value.
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