Physics

PLEASE HELP ME I AM TIMED!
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g A velocity selector consists of crossed electric and magnetic fields. The electric field has a magnitude of 480 N/C and is in the negative z direction. What should the magnetic field (magnitude and direction) be to select a proton moving in the negative x direction with a velocity of 3.50 cross times 10 to the power of 5 m/s to go un-deflected
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The Doppler Effect is caused by which of the following?Select all that applyA - motion of the source B - the type of waveC - original frequency of the source D - motion of the observer E - type of medium the wave is in
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It is almost as if each outer planet is a solar system in its own right.True or False
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____ 2. When an object is heated to the point that it glows, the process is called incandescence. ____________________
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The rollercoaster is near thebottom of the hill after the first bigdrop. Which best describes thepotential and kinetic energy?A. It has mostly kinetic energy.B. It has mostly potential energy.C. The kinetic energy is decreasing.D. The potential energy is about 50%and increasing.
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A wave has a frequency of 60 Hz and a wavelength of 1.7 meters. What is the speed of this wave? equation, substitution
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Object A is moving due east, while object B is moving due north. They collide and stick together in a completely inelastic collision. Momentum is conserved. Object A has a mass of mA = 16.7 kg and an initial velocity of = 7.26 m/s, due east. Object B, however, has a mass of mB = 29.3 kg and an initial velocity of = 4.39 m/s, due north. Find the (a) magnitude and (b) direction of the total momentum of the two-object system after the collision.
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A 10,000-watt radio station transmits at 535 kHz.Calculate the energy of a single photon at the transmitted frequency.A)3.55 10-28 J/photonB)3.55 10-31 J/photonC)6.63 10-30 J/photon
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Pls help me all dew in 5 minutes!
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TIME REMAINING15:56:15A plant root is an example ofType here to search
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Question 5 of 10What are two things that happen when a home computer scanner useselectromagnetic waves?A. Red light shines on patterns of black and white, recording thepattern of reflected light.B. Objects are exposed to X-rays, which either pass through or areabsorbed by the objects.C. A silicon chip releases electrons by the photoelectric effect,producing an image.D. A charge-coupled device captures visible light that is reflected offan object
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an object is acted by force of 22 newtons to the right and a force of 13 newtons to left
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A young boy swings a yo-yo horizontally above his head so that the yo-yo has a centripetal acceleration of 200 m/s^2. If the yo-ups string is 0.33 m long, what is the yo-ups tangential speed?
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The more diverse an ecosystem is A. the more threatened its populations areB. the more similar the species will beC. the more sustainable it isD. the fewer varieties of species are present
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stainless steel, tell us about its properties and what should be taken into account when using it?
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A belt of negligible mass passes between cylinders A and B and is pulled to the right with a force P. Cylinders A and B weigh, respectively, 5 and 20 lb. The shaft of cylinder A is free to slide in a vertical slot and the coefficients of friction between the belt and each of the cylinders are s = 0.50 and k = 0.40. For P = 3.6 lb, Determine: (a) Whether slipping occurs between the belt and either cylinder, (b) The angular acceleration of each cylinder.
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Which of the following skills that you learn while participating in a team sport is also a life skill that employers look for?A.Showing respect to othersB. Working well with others c.Problem solvingDAll of the above
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What is the equation for frequency?a. number of cycles +unit of time b. number of cycles - unit of time c. number of cycles unit of time d. number of cycles/ unit of time
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classify forest of nepal on the basis of height and temperature.
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The half-life of technetium-99 is 6 hours.How much of a 100 milligram sample oftechnetium-99 will remain after 30 hours? *O 3.125 mgO 12.5 mgO 6.25 mgO 1.56 mg
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SE UM CORPO ELETRICAMENTE NEUTRO CARREGADO COM PROTONS, entao afirmamos; a) fica carregado negativamente b) fica carregado s com cargas positivas c) fica carregado positivamente d) fica com excesso de eletrons e) continua eletricamente neutro
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Humans impact the Earth in good AND bad ways. A) True B) False
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A rod that is 96.0 cm long is made of glass that has an index of refraction equal to 1.60. The rod has its ends ground to convex spherical surfaces that have radii equal to 8.00 cm and 19.1 cm. An object is in air on the long axis of the rod 19.9 cm from the end that has the 19.1-cm radius.(a) Find the image distance due to refraction at the 19.1-cm radius surface.(b) Find the position of the final image due to refraction at both surfaces.(c) Is the final image real or virtual?
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