Master Physics with Fun Quizzes & Brain Teasers!

Robin is standing terrified at the end of a diving board, which is high above the water. If Robin has a mass of 76 kg and is standing 1.6 m from the board's pivot point, what torque is Robin exerting on the board
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The light intensity incident on a metallic surface with a work function of 3 eV produces photoelectrons with a maximum kinetic energy of 2 eV. The frequency of the light is doubled. Determine the maximum kinetic energy (in eV).
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Supriya has a pre-paid electricity connection at home. On a sultry Sunday afternoon, she checks that she only has 9 left in the balance. She wants to use the air conditioner (AC), rated at 1.2 kW. The price of electricity is 10 /unit in her area. How long can she run the AC before her balance is over and the power runs out?
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a material that is not a mixture; it has the same properties all the way through is called. Its 9 letters long and the second letter is u and the eighth letter is c. Its a crossword clue by the way
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A rabbit is moving in the positive x-direction at 1.10 m/s when it spots a predator and accelerates to a velocity of 10.9 m/s along the negative y-axis, all in 1.60 s. Determine the x-component and the y-component of the rabbit's acceleration. (Enter your answers in m/s2. Indicate the direction with the signs of your answers.)
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Question 43 ptsI am approaching a traffic light at a speed of 135 km/h when I suddenly notice thatthe light is red. I slam on my brakes and come to a stop in 4.29 seconds. What is theacceleration of the car as I screech to a complete stop? (Note that an object that slows downsimply has a negative acceleration.)& show work please I want to also understand
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why do you think we have different seasons (fall, summer, winter, spring) in certain areas of the world?
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The intensity of an earthquake wave passing through the Earth is measured to be at a distance of 54 km from the source. (a) What was its intensity when it passed a point only 1.0 km from the source
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C2B.7Suppose I drop a 60-kg anvil from rest and from such a height that the anvil reaches a speed of 10 m/s just before hitting the ground. Assume the earth was at rest before I dropped the anvil. (a) What is the earth's speed just before the anvil hits
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if earth were not tilted, would we still have seasons?
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juie ran eight laps around her school's quarter mile track in 18 minutes. her average velocity was _______m/s
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Henri draws a wave that has a 4 cm distance between the midpoint and the trough. Geri draws a wave that has an 8 cm vertical distance from the bottom of the trough to the top of the crest. Which statement best describes the energy in Henri and Geris waves? Henris wave has a higher amplitude and more energy. Henris wave and Geris wave have the same amplitude and the same energy. Henris wave and Geris wave have the same amplitude, but Geris has more energy. Geris wave has a higher amplitude and more energy.
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A 28.5-g object moving to the right at 18.5 cm/s overtakes and collides elastically with a 12.5-g object moving in the same direction at 15.0 cm/s. Find the velocity of each object after the collision. (Take the positive direction to be to the right. Indicate the direction with the sign of your answer.)
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Help needed!! Which of the following situations would be the BEST use for a circle graph? A. to show how much of the food you eat should be fruits and vegetables B. to compare how many apples, oranges, and bananas were eaten last week C. to compare the nutritional content of fruits to the nutritional content of vegetables D. to show how long different types of fruit can last in your house before they go bad
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A metal wire is in thermal contact with two heat reservoirs at both of its ends. Reservoir 1 is at a temperature of 563 K, and reservoir 2 is at a temperature of 354 K. Compute the total change in entropy arising from the conduction of 1760 J of heat through the wire. Please give your answer in units of J/K.
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The equation for distance is d = st. How far does a car go in 10 seconds at aspeed of 44 m/s?
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Using energy considerations, calculate the average force (in N) a 70.0 kg sprinter exerts backward on the track to accelerate from 2.00 to 9.00 m/s in a distance of 25.0 m, if he encounters a headwind that exerts an average force of 30.0 N against him.
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Un bombero alejado d = 31.0 m de un edificio en llamas dirige un chorro de agua desde una manguera contra incendios a nivel del suelo con un ngulo de i = 33.0 arriba de la horizontal como se muestra en la figura siguiente. Si la rapidez del chorro cuando sale de la manguera es vi = 40.0 m/s, a qu altura (en m) golpear el edificio? m
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Which of the following describes sound waves A. Waves that do not require a medium and in which the vibrations are parallel to the motion of the sound B. Waves that require a medium and in which the vibrations are perpendicular to the motion of the sound C. Waves that do not require a medium and in which the vibrations are perpendicular to the motion of the sound D. Waves that require a medium and in which the vibrations are parallel to the motion of the sound
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A ball is thrown so that its initial vertical and horizontal components of velocity are 30 m/s and 15 m/s, respectively. Estimate the maximum height the ball reaches. (Use 10 m/s2 as the acceleration of gravity.) 101 Incorrect: Your answer is incorrect.
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A rocket car on a horizontal rail has an initial mass of 2500 kg and an additional fuel mass of 1000 kg. At time t0 the rocket motor is ignited and the rocket burns fuel at a rate of 95 kg/s. The exit speed of the exhaust gas relative to the rocket is 2900 m/s. Neglecting drag and friction forces, determine the acceleration and the velocity of the car at time t = 10 s. Plot the acceleration and velocity from time t0 to t = 10 s.
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Indicar verdadero (V) o falso (F) con respecto al movimiento parablico : la componente horizontal de la velocidad permanece constante. ( ) la componente vertical de la velocidad puede ser nula en un instante. ( ) La velocidad en todo momento es tangente a la trayectoria. ( )
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HELP!!!What type of image is formed by a lens if m=-0.87?A. The image is smaller than the object and is real B. The image is smaller than the object and is virtual C. The image is larger than the object and is virtual D. The image is larger than the object and is real
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a zebra starts from rest and accelerates at 1.9 m/s2 what will be the acceleration after 5 seconds
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