Physics

From the top of a tall cliff of height y, a soccer ball is kicked horizontally so that it leaves the cliff with a velocity v. Assuming air friction is negligible, the speed of the ball just before it hits the ground is:
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Pls answer this questions
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If a star is 720 , 000 , 000 , 000 , 000 meters from Earth, how many seconds does it take light to travel from the Earth to the star
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An empty corn silo in the shape of a cylinder is being filled with corn
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Does the buoyant force on a submerged object depend on the volume of the object or on the weight of the object?.
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what are the milestones of modern phyiscs?
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All things being equal,in which of thefollowing locationswould you expect tofind the deepest andrichest topsoil?B. on a mountain topA. in the ArcticC. in a valleyD. on the side of a mountain
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Uranus and neptune have methane clouds but jupiter and saturn do not. Which factor explains why?.
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An athlete lifts a 330 N set of weights from ground level to a position over her head, a vertical distance of 2.05 m. Assume the weights are moved at constant speed. a) How much work does the athlete do? b) What is the mass of the weights?
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The wavelengths of visible light vary from about 300 nm to 700 nm. what is the range of frequencies of visible light in a vacuum?a) 90 hz to 210 hzb) 9*10^10 hz to 2.1*10 hzc) 4.28*10^5 hz to 1*10^6 hzd) 4.29*10^14 hz to 1*10^15 hz
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You are an astronaut floating in DEEP space (very little gravity). If you come upon a small metal object,what can you do to test if the object has MORE or LESS mass than you? What would happen? Explain
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A 100-cm long dipole is excited by a sinusoidally varying current with an amplitude i0=2 a. Determine the time average power radiated by the dipole if the oscillating frequency is 150 mhz
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A piston in an automobile engine is in simple harmonic motion. Its amplitude of oscillation from the equilibrium (centered) position is 6.83 cm and its mass is 2.708 kg.Find the maximum velocity of the piston when the auto engine is running at the rate of 3590 rev/min.Answer in units of m/s.
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a13. Chemical energy is a form of___________energy.
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If you have 10 ounces of meat, what percentage of the calories comes from fat if the meat is 90% lean?
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What units are appropriate to express specific heat?.
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12. Tom has two pendulums with him. Pendulum 1 has a ball of mass 0.1 kg attached to it and has a length of 5 m. Pendulum 2 has a ball of mass 0.5 kg attached to a string of length 1 m. How does mass of the ball affect the frequency of the pendulum? Which pendulum will have a higher frequency and why?Show all of your work.
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What is the new period if the pendulum is taken to a planet that has 4 times the mass and 4 times the radius of earth
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A car is traveling in a race. The car went from the initial velocity of 35 m/s to the final velocity of 65 m/s in 5 secondsWhat is the acceleration?- 13 m/som/6 m/s13 m/s
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Consider a system consisting of three particles: m1 = 4 kg, vector v1 = < 10, -5, 15 > m/s, m2 = 9 kg, vector v2 = < -15, 5, -3 > m/s, m3 = 3 kg, vector v3 = < -24, 36, 18 > m/s.a) what is the total momentum of this system? b) what is the velocity of the center of mass of this system? c) what is the total kinetic energy of this system?d) what is the translational kinetic energy of this system? e) what is the kinetic energy of this system relative to the center of mass?one way to calculate krel is to calculate the velocity of each particle relative to the center of mass, by subtracting the center-of-mass velocity from the particle's actual velocity to get the particle's velocity relative to the center of mass, then calculating the corresponding kinetic energy, then adding up the three relative kinetic energies. however, there is a much simpler way to determine the specified quantity, without having to do all those calculations; think about what you know about the relationships among the various kinds of kinetic energy in a multiparticle system.
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At what constant velocity must a spacecraft travel from earth if it is to reach the star in 3. 7 years, as measured by travelers on the spacecraft?
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In your own words describe the physiological significance of the fev1/fvc ratio
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