Master Physics with Fun Quizzes & Brain Teasers!

A truck quickly moving down a hill is said to haveQuestion 1 options:Large amounts of elastic energyLarge amounts of physical energyLarge amounts of potential energyLarge amounts of kinetic energy
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A subway car whose mass is 52,000. kg is traveling with a velocity of 3.4 m/s due north and collides with a second subway car whose mass is also 52,000. kg and is at rest. If the two cars stick together after the collision, what is the velocity of the two cars?
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When can acceleration be observed and what result will it have on an object?
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why do living beings and machine need energy?
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when did bohr propose his model of the atom?
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Im confused about something... how many years would it take to reach the sun..
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Your friend (68 kg) is wearing frictionless roller skates and standing still. You throw at her a 3.6 kg pumpkin with a velocity of 9.5 m/s and she catches it. What will be her resultant velocity ?
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The SI unit of power is???
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The chemical energy in your food is transformed into what type of energy in your moving muscles?
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An engine does 18500 J of work and rejects 7810 J of heat into a cold reservoir whose temperature is 285 K. What would be the smallest possible temperature of the hot reservoir
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The geocentric model could not explain which of the following observations made by early astronomers? Select the two correct answersMars and Jupiter appeared to move backwards for some period of timeThe planets had epicyclesThe stars appeared to moveMercury and Venus changed in appearance throughout the years
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A student conducts an investigation to determine how the force of gravity affects different objects dropped from different heights. The student tests each object one time and announces that all objects experienced gravity the same way.What is wrong with the students reasoning? A.Gravity is unable to be tested with simple experiments, but only in a science lab.B.The student failed to conduct repeated investigations with the same object to test for result reliability.C.People are unable to test the effect of gravity on an object because the force is too strong, so the results were invalid.D.The student failed to create a graph or chart to communicate the results instead of just announcing them.
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events occur at the same place in an inertial reference frame S and are sepa- rated in time by an interval of 4 s. What is the spatial separation between the 2 events in an inertial reference frame in which the events are separated by a time interval of 6 s
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A race car has a mass of 710 kg. It starts from rest and travels 40 m in 3.0 s. The car is uniformly accelerated during the entire time. What net force is applied to it
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A basketball player does 2.43 x 105 J of work during her time in the game, and evaporates 0,1 '10 kg of water. Assuming a latent heat of 2.26 x 106 Jlkg for the perspiration (same as for water), determine (a) the change in the player's internal energy, and (b) the number of nutritional calories the player has converted to work and heat.
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An arrow of mass 20 g is shot horizontally into a bale of hay, striking the hay with a velocity of 60 m/s. It penetrates a depth of 40 cm before stopping. What is the average stopping force acting on the arrow
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The block slides down an inclined track to an infinite length flat surface. The block continues on forever. Is energy conserved or not?
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MULTIPLE CHOICE1. Which of the following is the cause of anacceleration?a. speedc. forceb. inertiad. velocity
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PLS HELP How does the diagram explain ocean currents?Earth's tilt causes uneven heating of Earth which causes currents.Earth's tilt causes uneven distribution of salt which causes currents.Earth's tilt causes the ocean to move because of gravityEarth's tilt and its rotation cause currentsPls give explanation behind if possible!
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Which describes the sum of potential energy and kinetic energy of objects or systems? *a. nuclear energy and electric energyb. nuclear and mechanical energyc. thermal energy and electric energyd. thermal energy and mechanical energy
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A 100 N force is applied to a 50 kg crate resting on a level floor. The coefficient of kinetic friction is 0.15. What is the acceleration of the crate after it begins to move
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Name the disease that may spread due to deforestation
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Which of the following will increase as a material is heated and changes temperature?the charge of the molecules the mass of the moleculesthe kinetic energy of the moleculesthe potential energy of the molecules
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At perihelion a planet in another solar system is 175 x 106 km from its sun at traveling at 40 km/s. At aphelion it is 250 x 106 km distant. What is its speed at aphelion
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