Master Physics with Fun Quizzes & Brain Teasers!

1.If some unimaginable calamity destroyed the Sun, using the astronomical unit for the Earth-Sun distance and the value for the speed of light above, how long would we still have light after the Sun ceased to exist? (5)
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a box of 5kg is lifted 10m. how much work is done?
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Definition: the energy transferred by a force to a moving objectExample: Pushing pulling exerting force to do work Hint: first 2 letters are "me"
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How does increasing the amount of charge on an object affect the electric force it exerts on another charged object?
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how much work is done when a force of 45n pulls a wagon of 25 meters
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Once the lander has successfully landed on the surface, what is the minimum amount of thrust required to set it into motion again? Based on your answer, what can you conclude about the moons gravity?
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What force would you need to accelerate an object with a mass of 0.2 kgto the south at 600 m/s/s? *
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Knowledge of projectile motion might help you aim a basketball when you throw it so it is more likely to go into the basket. true or false please need a answer
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When a planet is at its slowest orbital speed, its radius vector sweeps an area, A, in 45 days. What area will the radius vector for this planet sweep during a 40-day time period while at its fastest orbital speed
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Definition: This is measured value (always positive) from one point to anotherExample: The height of a person or the length of the trip from Birmingham to AtlantaHint: first 2 letters are "di"
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In a chemical reaction, atoms are rearranged to form new substances. This happens predictably. The same reactants will form the same products no matter when or where the reaction takes place. For example, in a lab, you could combine iron and oxygen. The product will be the same iron oxide that forms on a rusty iron nail. Those are the same reactions. Similarly, if you've studied acids and bases, you probably know the products of a neutralization reaction. Acids and bases will combine in a chemical reaction to produce a salt and water.Based on the passage, rust will form on an iron nail when what has occurred?Aa neutralizationBan acid has combined with a baseCsalt has reacted with waterDiron has reacted with oxygen
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A car travels 100 kilo metre due east in 2 hours. it then travels 50 kilo metre south in hour. what is its average velocity?
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A light bulb has a resistance of 360. What is the current in the bulb when it has a potential difference of 120 V across it? 0. 33 A 3 A 480 A 43,200 A.
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An object is falling from a height of 7. 5 meters. At what height will its velocity be 7 meters/second? A. 49 meters B. 7. 5 meters C. 7. 0 meters D. 5. 0 meters E. 2. 5 meters.
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Suppose that a ball is released from the window of a train that is moving with constant velocity. The path of the ball, as observed from the train window, will be a horizontal straight line.true or falseplease need a answer
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A plane is dropping provisions to a village. If they drop a crate of supplies and are moving sideways at a speed of 180 mph, where is the most unsafe place for the villagers to stand if they want to avoid getting hit?A.directly under the plane as it drops the suppliesB.ahead of the plane as it drops the suppliesC.behind the plane as it drops the suppliesD.inside of the plane as it drops the suppliesneed a answer please
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the conduction velocity of an axon is determined by:
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2. A train travels with a constant speed of 56 miles per hour. How far can it travel in 1/2 hour?
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A man has 2 spheres A and B. He gently drops sphere A vertically down and throws the sphere B horizontally at the same time. Which of the following statements is correct? A.sphere B reaches the ground earlierB.not enough informationC.both spheres reach the ground at the same timeD.sphere A reaches the ground earlier
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Doc Brown holds on to the end of the minute hand of the clock atop city hall. The tangential velocity of the minute hand is 0.419 m/s. If the minute hand is4.0 meters long, what is the professor's centripetal acceleration?
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How can toxic shock syndrome be prevented?
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An ostrich lays the largest bird egg. A typical diameter for an ostrich egg at its widest part (diameter) is 12 cm (0.12 m). Suppose an egg of this size rollsdown a slope so that the centripetal acceleration of the shell at its widest part is 0.28 m/s2. What is the tangential speed of that part of the shell?
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Superman is at rest in space when he throws an asteroid that has more mass than he does. Which moves faster, Superman or the asteroid
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A rock tied to the end of a string moves in a circle at a constant speed of 2.5 m/s and experiences an acceleration of 4.0 m/s. What is the radius of thecircle of its motion?O 1.60 m
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