Master Physics with Fun Quizzes & Brain Teasers!

a 1.03 kg hammer moving at 1.25 m/s drive a nail 0.752 cm into a piece of lumber. what is the average resisting force this nail experiences as it is driven into the lumber
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A toroidal solenoid has mean radius 13.0 cm and cross-sectional area 0.900 cm2How many turns does the solenoid have if its inductance is 0.140 mH ?What is the resistance of the solenoid if the wire from which it is wound has a resistance per unit length of 0.0760 /m?
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What is the acceleration of a projectile? a 9.80m/s2 in the y axis b -9.80m/s2 in the x axis c -9.80m/s2 in the yaxis d 9.80m/s2 in the x axis
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which of the sources is commonly used as a continuum source in ultraviolet (uv) spectroscopy?
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a 50,000 kg locomotive is traveling at 10 m / s when its engine and brakes both fail. how far will the locomotive roll before it comes to a stop? a ssume the track is level.
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a chunk of ice ( at = -20c) is added to a thermally insulated container of cold water ( t = 0c). what happens in the container?
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find the dc operating point of the diode in steady-state. use the constant-voltage model with vd,on=800mv.
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a capacitor is created by two metal plates. each plate has dimensions l = 0.18 m and w = 0.22 m. the two plates are separated by a distance, d = 0.1 m, and are parallel to each other.
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what is the inductive reactance l of a 40.0 h inductor placed in an ac circuit driven at a frequency of =531 khz?
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a 10-bit dac has a range of 0 to 2.5v, what is the approximate resolution?
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A container of nitrogen gas (N2) at 23 C contains 425 L at a pressure of 3.5 atm. If 26.6 kJ of heat are added to the container, what will be the new temperature of the gas in C? Information) Heat Capacity (Specific Heat) of Nitrogen: 1.040 kJ/kg K
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3. A simple pendulum of length L 0.800 m has a mass M-0.250 kg. What is the tension in the stringS when it is at an angle = 12.57.4. In Question 3, what is the component of the weight of M that is directed along the arc of the motion of M?
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A 10-cm diameter metal ball falls through the air at its terminal velocity of 27.6 m/s. Now imagine that we double the mass of the ball while keeping its diameter and its surface properties the same (i.e., same drag coefficient, C). One way we could do this would be to replace some portion of the inside of the ball with a higher density metal. What would the terminal velocity of this new ball be?
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TRUE/FALSE. the greatest shear stress to the acl occurs in 60 to 90 flexion in an open kinetic chain exercise.
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calculate the total binding energy for 28 14si. the mass of 28 14si is 27.9769 u, the mass of the proton is 1.00782 u and the mass of the neutron is 1.00866 u.1. 246.539 MeV 2. 236.539 MeV 3. None of these 4. 266.539 MeV 5. 216.539 MeV 6. 256.539 MeV 7. 226.539 MeV
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A 2.5-kg object hangs from a vertical spring of force constant 610 N/m. It begins to oscillate with an amplitude of 3.1 cm. (Choose the point of zero potential energy to be the position where the object would hang if it were at rest.)(a) What is the angular frequency of the oscillations?(b) What is the period of the oscillations?(c) What is the total energy of the system?(d) What is the maximum kinetic energy of the object?
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what data were provided to determine that bage3 was metallic, and what observation prompted the assignment of the 4.0 k critical temperature?
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how much work does the tension in the ropes do as the child swings from the initial position to the bottom? express your answer in joules.
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true/false. for crystal diffraction experiments, wavelengths on the order of 0.21 nmnm are often appropriate.
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1.A kettle uses 160kJ of energy to heat the water in it from 25C to100C.1991How much water is in the kettle in kg?
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Potassium and gold cathodes are used in a photoelectric-effect experiment. For each cathode, find: The threshold frequency. The threshold wavelength. The maximum electron ejection speed if the light has a wavelength of 210 nm . The stopping potential if the wavelength is 210 nm . Throughout this problem, be sure to use 6.631034Js for Planck's constant.A) The threshold frequency of potassium in hertz.B) The threshold frequency of gold in hertzC) The threshold wavelength of potassium in nanometers.D) The threshold wavelength of gold in nanometers.
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a gas in a tank at 13.6 atm has a mole fraction of h2 gas of 0.535 and a mole fraction of n2 gas of 0.465. calculate the partial pressure of n2 gas in the sample.
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what would be the reaction force if a man pushes on the ground to jump up and dunk a basketball?
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if light with wavelengths near 621 nm falls on the grating, what order gives the best resolution
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