Master Physics with Fun Quizzes & Brain Teasers!

In a student lab experiment, 5.3 MeV alpha particles from the decay of 210Po are directed at a piece of thin platinum foil. If an alpha particle is directed straight toward the nucleus of a platinum atom, what is the distance of closest approach? How does this compare to theapproximately 7 fm radius of the nucleus?
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if the pressure exerted by a gas at 25c in a volume of 0.049 l is 4.23 atm, how many moles of gas are present?
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a force of 46 n pushes down on the movable piston of a closed cylinder containing a gas. the piston's area is 0.4 m2. what pressure does this produce in the gas?
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A ball of mass 5.4 0.1g is fired horizontally from a projectile launcher with an initial speed vi =305.5 cm/s. The ball travels horizontally a short distance before it strikes and becomesembedded into a pendulum that swings through an angle 0 above its rest position. The pendulumis initially at rest and has a length of 60.0 cm. If 0 = 3.5 cm, calculatea) the max height that the pendulum reaches above its rest position.b) the velocity of the system after the collision.c) the mass of the ballistic pendulum arm.
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Suppose that the uncertainty in position of an electron is equal to the radius of the n=1 Bohr orbit, about 0.5291010m.a)Calculate the minimum uncertainty in the corresponding momentum component. Express your answer in kilogram meters per second.b) Compare this with the magnitude of the momentum of the electron in the n=1 Bohr orbit.
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if the temperature is 178f, what is the temperature in degrees celsius? a) 352c b) 451c c) 67c d) 81.1c e) 378c
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when a transition metal atom formas an ion which electrons are lost first
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Buoyant force is greatest on a submergeda) 1-kg block of leadb) 1-kg block of aluminumc) is the same on each
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what is the wavelength of a sound produced by a tuning fork resonating with a 16 centimeter air tube that is open at both ends?
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A 3.0-cm-tall object is 50 cm in front of a converging lens that has a 25 cm focal length. You may want to review (Pages 589 - 592) . Part A Calculate the image position. Express your answer to two significant figures and include the appropriate units.
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how does increasing temperature affect the aqi and the level of ozone in the city? explain why higher temperatures have this impact on ozone
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g explain your reasoning for your answer to the t/f question increasing the concentration of greenhouse gases increases the amount of radiation that earth emits to space. and include the physics principles that support your reasoning.
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A Carnot engine has an efficiency of 66 % and performs 1.9104 J of work in each cycle.How much heat does the engine extract from its heat source in each cycle?Suppose the engine exhausts heat at room temperature (20.0C). What is the temperature of its heat source?
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a concentration cell is constructed of cobalt electrodes at 25c, and the half cells contain concentrations of co2 equal to 0.62 m and 0.97 m. what is the cell potential in volts?
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Suppose There Is No Damping In A Mass And Spring System With M = 5, K = 20, And F(T) = 5 Cos(Wt). Suppose W Is Chosen To Be precisely the resonance frequency. a) find w b) find the amplitude of the oscillations at time t = 100, given the system is at rest at t = 0
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we need to use the signal from a piezoelectric vibration sensor in a computer-aided instrumentation system. the signal is known to contain components with frequencies up to 40 khz.T/F
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What is the inductive reactance of an inductor that drops 12 VRMS and carries 50 mARMS? a. 240 b. 60 c. 6 d. 600
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A car is moving at 60 mi/hr (88 ft/sec) on a straight road when the driver steps on the brake pedal and begins decelerating at a constant rate of 12 ft/sec^2 for 3 seconds. How far did the cargo during this 3-second interval?
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A 0.200 H inductor is connected in series with a 96.0 resistor and an ac source. The voltage across the inductor is vL=(12.5V)sin[(483rad/s)t] Part A Derive an expression for the voltage vR across the resistor. Express your answer in terms of the variables L, R, VL (amplitude of the voltage across the inductor), , and t Part B What is vR at 2.15 ms ?
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Find the energy required to excite a hydrogen electron for the following cases.Part Afrom the ground state to the third excited state?E =eV
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A 15.0 kg bucket is lowered vertically by a rope in which there is 165 N of tension at a given instant. What is the acceleration of the bucket?
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Find the equation for (a) the tangent plane and (b) the normal line at the point P0(1/3,1,e) on the surface 6xlny+ylnz=3x.(a) Using a coefficient of 3 for y, the equation for the tangent plane is
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A 1.000-g sample of limestone rock is crushed to powder and then treated with 50.00 mL of 0.1012 M HCl. The excess acid required 25.26 mL of 0.1050 M NaOH for neutralization. Calculate the percent by mass of the calcium carbonate in the rock
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Water flows through a 2.9-cm-diameter hose 2.7 m/s. How long, in minutes, will it take to fill a 600 L child's wading pool?
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