Master Physics with Fun Quizzes & Brain Teasers!

Electricity & Magnetism4Electricity can be used to produce powerful forces.What type of energy is electricity converted to in an electromagnet?A. sound energyB.heat energyC. light energyD. magnetic energy
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As part of their research on cell reproduction, Ms. Kelly's biology class designed various experiments to determine the best conditions for budding, or asexual reproduction, in common yeast cells. The students added sucrose as a source of food for the yeast and each group added water of a different temperature to the yeast-sugar mix. They used a light microscope to observe and count the yeast cells.Based on the recorded data, what observation did the students make regarding the growth of yeast cells?A) Once the temperature reached 50oC, the yeast died. B) The size of individual yeast cells increased with an increase in temperature. C) Increased temperature played no role in increasing the number of yeast cells. D) The number of yeast cells increased as the temperature of the water increased.
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What is the momentum of a 76kilogram horse running at a speed of45 kilometers/hour?A. 2.5 102 kilogrammeters/secondB. 3.4 104 kilogrammeters/secondC. 3.4 103 kilogrammeters/secondD. 9.5 102 kilogrammeters/second
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A 58.72 kg person holding a steel ball stands motionless on a frozen lake.The person then throws the ball, which propels the person at 1.05 m/s to theright and the ball 3.75 m/s to the left. If the initial momentum of the system iszero, what is the mass of the steel ball?
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HELP PLEASE AND HURRRRRYHow far a projectile moved horizontally from its starting point is its...A. trajectory B. ElipseC. RangeD. Projectile
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A 65.25 kg person holding a steel ball stands motionless on a frozen lake.The person then throws the ball, which propels the person at 1.25 m/s to theright and the ball 4.05 m/s to the left. If the initial momentum of the system iszero, what is the mass of the steel ball?
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A race car driver travelling at 15m*s^-1 accelerates at a constant value for 10.0s. She is now driving at a speed of 35 m*s^-1 What was her acceleration? Give your answer in m*s^-2 to one significant figure . Do not include units with your answer.
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2. An athlete runs up the stairs of a tall building in 10 s. If she has a mass of 55 KG and the total vertical distance she covers is 8.2 m, what is the average power (in W)developed by her legs?
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PLEASE HELP AND HURRRRYA package is dropped from a plane flying at a constant speed. Neglecting air resistance, when the package hits the ground the horizontal location of the plane will....A. Be behind the packageB. Depend on speed of packageC. Be directly over the package D. Be in front of the package
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A train is traveling at a speed of 50km/hr. How.many hours will it take the train to travel 800 km?
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Explain the quantization of energy.
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Which of the following is an example of a properly written testable hypothesis? * A people should taste this new health food and see whether it makes them stronger B When dog owners don't feed their puppies Brand A food, the puppies do not grow properly C If Frederico had added the leaves to the compost pile last year, he wouldn't have to organic fertilizer D if it is dark, then an owl will find a mouse by the sound the mouse makes
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action reaction forces are in which one of newtons laws
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Johnny often hits his brother even though his brother does not do anything to the tag and eyes assume Johnny aggression is more like most likely due to a combination of
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Which of the following might be the material list for an experiment? A data tables and graphs B.meters, liters, and kilograms C plastic containers, soil, water, thermometers, and plants D temperature, light, and time
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Help! Please: Which is elastic and which is inelastic
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Knowing that 1 inch is equal to 2.54 centimeters, convert 287 cm to inches.
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Is nitrogen a compound
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Why do humans still think there is a god even though science has proven them wrong every time?
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You measure the mass of an apple using a balance. You get these three measurements:Trial 1: 167.0 gTrial 2: 166.9 gTrial 3: 167.2 gYou know that the true mass of the apple is 172 g. Describe your results in terms of precision and accuracy. Explain your answer.Read the assignment carefully and make sure you answer each part of the question or questions.After you've written your response, go back and read it again to make sure your thoughts are clear.
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Which quantity is a vector?displacementdistance
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Which of the following statments does not represent the relationship between culture and one's moral reasoning?A.Cultures generally differ in what behaviors are considered appropriate.B.One's thought and beliefs are generally independent of cultural influences.C.Many cultures value an individual's rights and well-being when establishing moral standards.D.Many cultures consider situational influences when judging one's behavior as right or wrong.
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Melanie and Lance gathered data about the effectiveness of maskspreventing disease. One of the questions they ask the experimentalsubjects is their age. What type of observation is this? *
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QUICK QUESTION: What forces are acting upon a flying baseball when someone throws it?
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