Master Physics with Fun Quizzes & Brain Teasers!

what is a recovery heart rate?
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The air temperature is 70 degrees, and the relative humidity is 90%. Which conclusion can be made?(1 point)The air holds little water vapor and is relatively dry.The amount of water vapor in the air is 90% of what the air can hold.The dew point temperature is 90% of the air temperature.The temperature must rise in order for air to become saturated with water vapor.
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A student pulls a block across the desk in physics class. He applies 14N oftension in the string, but friction holds the box back with 4N. His partnermeasures the acceleration of the box across the desk to be 2m/s2. Whatmust the mass of the box be?100 Pointsss hellppp
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A basketball is picked up off the ground and carried to the top of a platform that is 160 feet up. It is then dropped to the ground. The ball rebounds one-half the height each time it hits the ground. What is the total vertical distance the ball will travel from the moment it is picked up to the moment it reaches its maximum height after the fourth bounce
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Two spherical objects with a mass of 3.17 kg each are placed at a distance of 2.96 m apart. How many electrons need to leave each object so that the net force between them becomes zero
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A force is exerted on a box an an equal and opposite force is exerted by the box. what explains this?
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An equilateral triangle is a triangle with all three sides of equal length. All of the angles in an equilateral triangle are equal.What is the measure of angle in the triangle shown?(Figure 1) Recall that the sum of the angles in a triangle equals 180.
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what 5+1234567890987654345632675432
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True or False. The more energy put into making a sound the lower its intensity.
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A 30 kg dog runs at a speed of 15What is the dog's kinetic energy?
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What happens to Average Speed if distance decreased & time stayed the same?
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What could you do to find the density of a fork, knife, and a spoon?
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When the sum of all the forces acting on a block on an inclined plane is zero, the blockA) must be at restB) must be acceleratingC) may be slowing downD) may be moving at constant speed
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You fill a car with gasoline. The car now has... ( what energy)
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In the laboratory, a ball is dropped onto a force-sensing platform several times, each time hitting a different surface (foam, feathers, clay, etc.). The momentum of the ball changes by the same amount in each trial; in each trial, the average scale reading is F, and the time of collision t are measured. What quantities would need to be graphed to exhibit a straight-line relationship
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A ray of monochromatic light is incident on a plane mirror at and angle of 30. The angle of reflection for the light is1)152)303)604)90
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7. A volcanic island arc is formed when
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To review the solution to a similar problem, consult Interactive Solution 1.43. The magnitude of a force vector is 87.4 newtons (N). The x component of this vector is directed along the x axis and has a magnitude of 72.1 N. The y component points along the y axis. (a) Find the angle between and the x axis. (b) Find the component of along the y axis.
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A car is traveling at 120 km/h (75 mph). When applied the braking system can stop the car with a deceleration rate of 9.0 m/s2. The typical reaction time for an alert driver is 0.8 s versus 3 s for a sleepy driver. Assuming a typical car length of 5 m, calculate the number of additional car lengths approximately it takes the sleepy driver to stop compared to the alert driver. Group of answer choices
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A person weighs 60kg. Calculate the amount of work done if he is raised 12m into the air.
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If the force of gravity suddenly stopped acting on planets, they wouldA.) spiral slowly towards the sunB.) continue to orbit the sunC.) move in straight lines tangent to thier orbits D.) spiral slowly away from the sunE.) fly straight away from the sun
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Precisely 1.00 s after the speeder passes, the police officer steps on the accelerator; if the police car's acceleration is 2.70 m/s2 , how much time passes after the police car is passed by a speeder and before the police car overtakes the speeder (assumed moving at constant speed)
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A rock is thrown directly upward from the edge of a flat roof of a building that is 56.3 meters tall. The rock misses the building on its way down, and is observed to strike the ground 4.00 seconds after being thrown. Take the acceleration due to gravity to have magnitude and neglect any effects of air resistance. With what speed was the rock thrown
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What part of a motor causes its electromagnet to turn in the same directionconsistently, transforming electrical energy into mechanical energy?A. CommutatorB. Loop of wireC. Permanent magnetsD. BatteryPLS HELP
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