Master Physics with Fun Quizzes & Brain Teasers!

A car with weight of 7,656newton is moving with 43.13km/h. The driver applies thebreaks to stop the car in 9.38seconds. The magnitude of theforce (in newton) needed tostop the car is:
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A block of mass m = 4.4 kg, moving on frictionless surface with a speed vi = 9.2 m/s, makes a sudden perfectly elastic collision with a second block of mass M, as shown in the figure. The second block is originally at rest. Just after the collision, the 4.4-kg block recoils with a speed of vf = 2.5 m/s. What is the mass M of the second block? 7.7 kg6.2 kg10 kg2.2 kg14 kg
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Organs receive the oxygenated blood and ???? to the heart and lungs
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25. Heat is supplied at the same rate to two metals at room temperature. Which metal will reach 20 above room temperature first?Select one:a. Iron will reach 20 above room temperature first because it has a lower specific heat.b. Silver will reach 20 above room temperature first because it has a higher specific heat.c. They will reach room temperature in the same amount of time.d. It depends on the room temperature.
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Pressure is best defined as which of these? A)same thing as force B)kinetic energy per unit volume C)work per unit temperature D)energy per unit mass E)force per unit area
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Which characteristic of sound is associated with frequency?1) pitch2) loudness3) pressure4) timbre
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What are atomic particles move from one surface to another in order to form a static charge?
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this is a session with 5 attachments. to check in Android and iOs
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Relying on windows and building materials to capture incoming solar radiation WITHOUT distributing that energy is called:A. photoelectric heatingB. active solar heatingC. passive solar heatingD. cell heating
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The relative density of fully charged car battery is --------.A. 2.15B. 1.52C. 1.25
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When graphing experimental results which variable is plotted on the y axes?
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A hawk's eye has a diameter of0.00620 m. What is the closestdetail it could possibly resolve at50.0 m, using 525 nm light?[?] m
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a point in the xy plane has Cartesian coordinates (-3.0,5) m What are the polar coordinates of the point?
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The bullseye of a dart board is directly across from the dart being thrown, S. / maway. If the dart is released at 21.3 m/s horizontally. Does the dart hit within 1.00cm of the bullseye? It not, how should the shot be adjusted?
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. Draw a schematic circuit with two cells placed in parallel providing powerto a single light controlled by a switch drawn in the closed position. Includea voltmeter to read the potential difference across one light. Indicate bothconventional current in blue arrows and electron flow in black arrows.
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Hello could you please help me with this problem? Write an equation in standard form for the line that has an undefined slope and passes through (-6,4).
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a hydraulic lift requires a minimum effort force force of 14.4N to lift a patient of mass 82kg .How much is the effort piston area if the resistance piston has an area of 1.2m2, assuming the piston are circular
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Please explain the 2nd law of thermodynamics and give a example
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The following diagram shows the motion of a person along a straight horizontal path which is divided into two stages: In Stage I (AB), the person starts from rest and accelerates by a constant rate of 0.4 m/s over a distance of 20m. In stage 2 (BC), the person moves at constant velocity v for 10s. The average velocity of this person during the whole trip is:
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In order for electrons to move, there must be voltage difference.TrueFalse
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Question 2 of 10Which of the following is a concern about the use of wind energy?A. Wind farms produce radioactive waste.B. Wind farms may pose a threat to birds and bats.C. Wind farms often change the local weather patterns.O D. Wind farms produce a large amount of air and water pollution..SUBMIT
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Light rays that are reflected twice inside a rain water droplet can produce a second-order rainbow. Is this true or false?
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Find the mass of the table. Your classmates mass is 65 kg and the table weighs 0 N.
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A standard rifle has a mass of 2.69 kilograms. If it were used to fire an "elephant gun" round of mass 69.4 grams at +650 meters per second, what would be the recoil velocity of the rifle? Include units in your answer. More information.
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