Master Physics with Fun Quizzes & Brain Teasers!

Anna has a total of 36 goldfish in her aquarium, some are orange and some are black. The number of orange goldfish is 7 more than twice the number of black goldfish. Which system of equations below can be used to describe the number of black and orange goldfish in Anna's aquarium?(Let x represent the number of orange goldfish and y represent the number of black goldfish.)A. x + y = 36x - 2y = 7B. x - y = 7x + 2y = 36C. x - y = 36x + 2y = 7D. x + y = 7x - 2y = 36
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when a hot pan is placed in the freezer it appears that energy is lost however we know that is not the case. explain where the energy flows to
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A spring has a spring constant of 25 newtons per meter. Calculate the magnitude of the minimum force required to stretch the spring 0.25 meter from its equilibrium position
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Compare: 0.1299 O 0.3A.>B.
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Why do some materials conduct electricity better than others? How can electrical conductivity be used to distinguish between metals and nonmetals?
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Roland throws a 0.05kg egg with a velocity of 10 m/s to the right. The egg hits a wall and breaks. Which of the following is true?A. Momentum is not conserved because outside forces act on the systemB. The total momentum before the collision equals the total momentum after the collisionC. The momentum of the wall after the collision is 0.5kg m/s to the rightD. The momentum of the egg after the collision is 0.5kg m/s to the left
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If an electrical component with a resistance of 54 is connected to a 114-V source, how much current flows through the component? answer in:_____A
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Solar radiation at the surface of the earth is about 700 W/m2. How much solar energy is incident on a roof of dimensions 7.48 m by 15.16 m in 1.09 hours?
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CNM has decided to purchase some Swanky luxury water beds for the new dormitories. Each water bed has dimension of 1.83 m x 1.93 m x 0.248 m. The floor of the dorms will tolerate an additional weight of no more than 7150 N. Find the weight of the water in your bed and determine whether CNM should make the purchase.
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What will hit the ground first, a 50 pound weight or a 5 pound book? Explain.
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If a baseball lands with a speed of 80 miles/hr after traveling with an acceleration of -6 miles/hr/sec for 5seconds, what was the initial speed at which the ball was hit?
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A particle is moving with a constant acceleration of 4.0 m/s 2. Its speed at t = 1.0 s is 4.0 m/s and at t = 3.0 s it is 12.0 m/s. What is the area under the position-time graph for the interval from t = 1.0 s to t = 3.0 s?
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A passenger plane departs from an airport and takes the following route: it first travels from a point O to city A, located 175 km in a direction 30 north of the East. Then it goes to city B at 153 km. Heading 20 west of north. Finally fly 195 km. Directly west towards city C. The position of city C with respect to the position of the starting point is:
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An object of mass 17.0 kg subjected to a non-zero net force moves with an acceleration of 2.2 m/s^2(a) Determine the net force (in N) acting on it. (Enter the magnitude only.)________N(b) What acceleration (in m/s^2) would a 34,0-kg object have if the same net force is applied to it?_______m/s^2
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A car of 1000 kg car experiences a net force of 9500 N while decelerating from 300.0 cm/s to200 cm/s. How far does it travel while slowing down?None of the above18.5mO 0.263mO 20.2 mO 21.9 m
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In 1 to 2 sentences, Explain how a decrease in the resistance caused by friction change the amount of force needed to move an object? When you answer the question please put a explanation for a younger child would be greatly appreciated!!
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A wagon is pulled from rest to 14 m/s in 45 seconds. If the mass of the wagon is 5 kg.what was the applied force?
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A ball is initially moving at 6 m/s up a ramp. The acceleration of the ball is -2 m/s/s down the ramp. What is the balls velocity after 10 seconds? (frame of reference + is up the ramp)
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34. Two students, Tom and Jerry devise a plan to determine the coefficient of friction between socks and freshly waxed floors at the school. Tom (60kg) pulls Jerry (75kg) with a force of 185N to get him to start sliding across the floor.a) What is the magnitude of the force that Jerry exerts on Tom? b) What is the normal force of Jerry from the surface? c) What is the coefficient of static friction between the socks and the waxed floor?
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Convert 43.2 cm tom4.32 m4320 m432 mO0.432 m
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An object of mass 4kg moves in a circle at radius 8cm at uniform speed of 32m/s calculate (A)The angular velocity (B) The centripetal force
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Define relative permittivity for a dielectric medium
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which of these are not yet a habit for you? what can you do to turn them into daily habits?
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A ray of light in air is approaching the boundary with water at an angle of 52 degrees. Determine the angle of refraction of the light ray. (Refractive index of water = 1.33)
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