Master Physics with Fun Quizzes & Brain Teasers!

Suppose you pour water into a container until it reaches a depth of 18 cm. Next, you carefully pour in a 8.2 cm thickness of olive oil so that it floats on top of the water. What is the pressure at the bottom of the container?
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In an oscillating LC circuit in which C=4 F, the maximum potential difference across the capacitor during the oscillation is 1.5 V and the maximum current through the inductor is 50 mA. How much time is required the charge on the capacitor to rise from zero to its maximum value ?
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what will be the equilibrium temperature when a 215 g block of copper at 255 c is placed in a 155 g aluminum calorimeter cup containing 845 g of water at 16.0 c
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for a nearsighted person with a far point of 40 cm, what lens should be used?
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A child on a swing set swings back and forth with a period of 2.7 s and an amplitude of 25 degrees. Suppose that the motion is simple harmonic.What is the maximum speed of the child as she swings?
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if the ball is stationary just before it is hit and goes 5.00 mm high, what impulse did she impart to it?
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a styrofoam sphere of radius r has a density rho. you now carefully compress the sphere so its radius is r/2. what is the density of the compressed sphere?
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a complete collision between a blowdart and a low-friction cart, darts mass is 28.1g and the cart mass is 300.8g a collision happened at 0.1500s. the distance was 45cm. Using your measurements of the blowdart's position and time, determine the initial velocity of the blowdart. Make sure to include units. Is this an elastic or inelastic collision? use the conservation of momentum equation to predict what the velocity of the blowdart and cart would be after the collision. (this is right before the blowdart and the cart have moved along with each other).
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an object has a parallax of .24 arcsecs. what is its distance in parsecs?
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A small object begins a free-fall from a height of 21.0 m. After 1.10 s, a second small object is launched vertically upward from the ground with an initial velocity of 34.0 m/s. At what height h above the ground will the two objects first meet?
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at what height h above the ground does the projectile have a speed of 0.5v ? express your answer in terms of v and g . you may or may not use all of these quantities.
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the difference between the frequency f and the frequency is that f is measured in cycles per second or hertz (abbreviated hz ) whereas the units for are __________ per second.
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calculate the activation energy, a , in kilojoules per mole for a reaction at 65.0 c that has a rate constant of 0.295 s1 and a frequency factor of 1.201011 s1
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If a ball is moving at the velocity of 10 m/s east with a momentum of 50 kg m/s east, what is its mass?
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a 5.60-m-long, 500 kg steel uniform beam extends horizontally from the point where it has been bolted to the framework of a new building under construction. a 70 kg construction worker stands at the far end of the beam.What is the magnitude of the torque about the bolt due to the worker and the weight of the beam?
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indicate whether each statement about the nucleus of an atom is true or false.you are currently in a labeling module. turn off browse mode or quick nav, tab to items, space or enter to pick up, tab to move, space or enter to drop.true/falsestatementthe nucleus of an atom is neutral.the nucleus of an atom contains only neutrons.the number of nucleons present in the nucleus is equal to the number of electrons present outside the nucleus.the nucleus accounts for almost all the volume of an atom.the nucleus accounts for almost all the mass of an atom.the nucleus can be positively or negatively charged depending on the identity of the atom. answer bank
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A car traveling at 30 m/s runs out of gas while traveling up a 5 degree slope. How far will it coast before starting to roll back down?
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if control requirements are very complex or extensive, a double reley can be installed.T/F
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an electron has a total energy of 5.5105ev . what is its speed?
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helium-neon laser light (l = 632.8 nm) is sent through a single slit of width 0.30 mm. what is the width of the central maximum on a screen 1.0 m in back of the slit? (1 nm = 10-9 m)
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how high must a 19.0kg object be to have 915.j of gravitational potential energy? a. 170.m b. 4.91m c. 0.203m d. 729m
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Explain how speed, velocity, and acceleration relate to a roller skater skating around the rink
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when light crosses the boundary between media the characterisitc of the light that remains unchanged is
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what is the direction of the frictional force exerted on a coffee cup sitting on a stationary table? there is no frictional force being exerted on the cup. downward. upward. to the right. to the left.
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