Master Physics with Fun Quizzes & Brain Teasers!

Andy pushes a backpack toward the right with a force of 6 N, while Paul pulls on it toward the left with a force of 4 N. What is the total force the backpack feels?
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Calculate the weight of the following objects on earth (assume g=10 N/kg)a) 12kgb) 500gc) 20g
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A hypothesis is A) An experimentB) an untestable statementC) an education guessD) A procedure
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how do you make a conclusionA) you keep making different tests until they show what you want to seeB) you look at your hypothesis and choose which one you like bestC) you guess what the result should be D) you compare the data from your experimental results to the prediction being tested
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What will happen ifany bulb goes out?AA. Only A will remain lit.B. A and C will remain lit.C. Only C will remain lit.D. All bulbs will go out.
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a super man I sitting on a tree 98m high with a he has rescued from a claws of a tiger. unfortunately the child shift and falls with an initial velocity of 0m/s supposed reached what was happened 2 second later and flow to catch the child at a speed of 39.2m/s find the time super man will fly before catching the child, and the distance super man fly to catch the child
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1) what is the difference between a question and hypothesis
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Can someone help me asap, please? I need to explain what is happening in the picture and include potential energy to kinetic energy in a few sentences. 2 or 3 sentences
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Differentiate conductors and insulators with the help of suitable examples
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Why should an electrician use rubber gloves while repairing an electric switch at your home? Explain.
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Would the bulb glow after completing the circuit shown in Fig. 2 if instead of safety pin we use an eraser?
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Factorise fully62 - 9
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Electrical power companies sell electrical energyby the kilowatt-hour, where 1 kWh = 3.6x106 J.Suppose that it costs $0.15 per kWh to run yourelectric water heater. How much does it cost to heat 75 kg of water from 15C to 43C to fill a bathtub?
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1- A car engine's cooling system con-tains 20.0 L of water (1 L of water has a mass of 1 kg).a. What is the change in the temperature of thewater if 836.0 kJ of thermal energy is added?b. Suppose that it is winter, and the car's coolingsystem is filled with methanol. The density ofmethanol is 0.80 g/cm. What would be theincrease in temperature of the methanol if itabsorbed 836.0 kJ of thermal energy?c. Which coolant, water or methanol, would betterremove thermal energy from a car's engine?Explain.
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If m1 = 12 Kg, 1 = 60 And m2 = 8 Kg, 2 = 35 Assuming =0 (the pulley is frictionless and massless along the rope)1- Draw Free body diagram of the system2- Find the acceleration of system 3- Find the tension of the system
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1. A force of ION causes aspring to extend by 20mm. find A.the spring constant of the spring in N/m B.the extentsion of the spring in N/m C. the force applied that causes an externos Of 9mm.
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Two billiard balls roll towards each other. They each have a mass of 0.3 kg. ball 1 is moving at 1 m/s to the right while ball 2 is moving at 1 m/s to the left. Calculate the momentum of the system.with explanation pls
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When two forces are acting a body in opposite direction their resultant become 6N and when they are acting in the same direction their resultant becomes 12N. What is the value of two forces?
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What mistake did Farah make in this experiment? Farah conducted the following experiment to check whether fabrics of different colours take different times to dry. She took one piece each of red, white and blue cotton. They were all of the same size and quality. She wet each piece with the same amount of water and hung them from spring balances near a fan as shown above. She noted the weight of each piece of cotton. She then put the fan on and noted the weight of each piece of cotton at the end of every two minutes. The weight of all the pieces of cotton decreased as water evaporated from the them.
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how do you determine the average speed of an object in cm/s
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If you blew on balloons and they move, is that a contact or non-contact force? Explain your answer.
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Pls help its easy ik but I want to make sure of them both I dont have much time
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Perform the operation of 147.02 / 0.338, and report the result with the proper number of significant figuresin standard powers-of-10 notation.
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what is science and why do we study science and what are the benefits we are going to get from it ?
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