Master Physics with Fun Quizzes & Brain Teasers!

a 11/2 inch bolt is inserted through a block 11/16 inch thick with a 1/8 inch washer and 1/2 inch nut. how much of the bolt will extend beyond the nut?
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what is the standard temperature for thermodynamics in degrees celsius (c)? (enter the number only) what is the standard pressure for thermodynamics in atmospheres (atm)? (enter the number only)
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100-kg spacecraft is in a circular orbit about Earth at a height h 2RES () What is the orbital period of the spacecraft? (a) What is the spacecraft s kinetic energy? (c) Express the angular momentum L of the spacecraft about the center of Earth in terms of the kinetic energy K and find the numerical value of L.
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a uniform electric field is increasing at the rate of 1.5(V/M)/us. Find the displacement current through a 1-cm^2 area perpendicular to the field.
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true/false. a circular field may be induced into a specimen by: passing current directly through the part.
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An airplane tows a 2m tall advertising banner at a speed of 160 Km/hr. If the banner is flat and 5m long, then estimate its drag assuming fully turbulent flow. ( = 1.8 x 10-5 N s/m2 rho = 1.2 kg/m3 )
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When Light travels at a speed of 1.97 x 10^8 m/s in crown glass. When a ray of light travels from air into crown glass at an incidence angle of 30 degrees. What is the angle of refraction?
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what are the magnitude and direction of the torque about the origin on a plum located at coordinates (-4 m,0 m, 6 m) due to force f whose only component is fx = 9 n?
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A car started moving from rest and reached the speed of 160 km h in 30 minutes. Calculate the distance travelled
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A fishing boat uses sonar to locate a shoal of fish. The sonar system sends a pulse of sound towards the shoal. When it hits the shoal, the sound wave is reflected and picked up by a detector underneath the ship. The speed of sound in water is 1500 m/s. The pulse of sound waves is received 0.48 s after it is emitted. How far from the boat is the shoal of fish? A. 1563 m B. 3125 m C. 720 m D. 360 m
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Describe 9 how you would measure the circumference of a beaker using a thread and metre rule
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Escape Velocity Learning Goal: To introduce you to the concept of escape velocity for a rocket. The escape velocity is defined to be the minimum speed with which an object of mass m must move to escape from the gravitational attraction of a much larger body, such as a planet of total mass M. The escape velocity is a function of the distance of the object from the center of the planet R, but unless otherwise specified this distance is taken to be the radius of the planet because it addresses the question "How fast does my rocket have to go to escape from the surface of the planet?"The key to making a concise mathematical definition of escape velocity is to consider the energy. If an object is launched at its escape velocity, what is the total mechanical energy Etotal of the object at a very large (i.e., infinite) distance from the planet? Follow the usual convention and take the gravitational potential energy to be zero at very large distances.Etotal=Consider the motion of an object between a point close to the planet and a point very very far from the planet. Indicate whether the following statements are true or false.-Angular momentum about the center of the planet is conserved. (t/f)-Total mechanical energy is conserved. (t/f)-Kinetic energy is conserved. (t/f)
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A rocket of mass 6.0 kg takes off from the ground and goes straight up. During the first 100 meters of its ascent, the engine exerts a 80 newton upward force on the rocket. a) how much work does the engine do on the rocket during those first 100 meters? b) Assuming kinetic and potential are the only kinds of energy the rocket gains, how much kinetic energy does the rocket have at the moment it's 100 meters above the ground? (Hint: You'll need to use a formula for gravitational potential energy but not a formula for kinetic energy. Think about the relationship between work and energy. To keep the math less messy, approximate g as 10 m/s^2.) c) At height 100 meters, the rocket has 1850 joules of kinetic energy, which is less than your part b answer. Is energy not conserved , or is something else going on? Where are the "missing" joules?
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"A pilot heads his jet due east. The jet has a speed of 475 mi/h relative to the air. The wind is blowing due north with a speed of 40 mi/h. (Assume that the i vector points east, and the j vector points northwhat is the true direction of the jet? (round your answer to one decimal place.)"
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a 12 v potential difference is applied across a parallel combination of four 7.0 w resistors. the total current in the circuit is ______ a.
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nitroglycerine energy density compared to natural gas
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if the current in a wire of a cd player is 7.30 ma, how long would it take for 10 c of charge to pass a point in this wire
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For copper, the heat capacity at constant volume Cv at 20 K is 0.38 J/mol-K and the Debyetemperature is 340 K. Estimate the specific heat for the following:(a) at 40 K(b) at 400 K
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he heart does about 1.0 j of work while pumping blood into the aorta during each heartbeat. part a determine the work done by the heart in pumping blood during a lifetime. assume an average rate of 67 beats per minute for a person who lives to age of 71 years. express your answer with the appropriate units.
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A photon after being scattered from a free electron at rest moves at an angle of 120 degrees with respect to the incident direction. If the wavelength of the incident proton is .611 nm, what is the kinetic energy of the recoiling electron?
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find the distance (in metres) traveled by a radio wave in 21.5 h.
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will light change direction toward or away from the perpendicular when it goes from air to water? water to glass? glass to air?
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For a particular transition, the energy of a mercury atom drops from 8.82 eV to 6.67 eV.a. What is the energy of the photon emitted by the mercury atom?b. What is the wavelength of the photon emitted by the mercury atom?
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In a diagnostic x-ray procedure, 5.001010 photons are absorbed by tissue with a mass of 0.600 kg. The x-ray wavelength is 2.0010^-2 nm.What is the total energy absorbed by the tissue (in Joules)?What is the equivalent dose in rem?
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