Water flows vertically out of a circular faucet that has a diamter d=0.050m, height = 0.55m, speed after falling that height = 3.58 m/s.
What is the volume of water that exits the faucet in 2.0 seconds? Please write formula used to solve this eq.
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Why is it that when you put something metal in the microwave, you get a firework display, and yet the inside of the microwave is made out of metal?
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Describe the differences between circular motions and elliptical motions. Explain how Newton’s universal gravitational law can be applied to study the interplanetary motions.
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Waves travel at different velocity in different medium. How does wave velocity effect wave frequency?
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what would the kvl be if -330i1-470i2-860i2+9=0 and -6-12-560i3-860i2+9=0 and -330i1-470i1+560i3+12+6=0 and i2=i1+i3.find i1, i2, i3.
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How did shortening the length of the spring affect the resonant frequencies? How does this confirm the relationship v = ? f when velocity is constant? And how musical instruments create higher and lower tones. Use a string instrument as an example.
I can't explain above question well....When the wavelength becomes short, it increases its frequency.
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a ray of yellow light crosses the boundary between glass and air, going from glass to air. If the angle of incidence is 30 degrees, what is the angle of refraction
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A ball is kicked horizontally with 15 m/s initial speed from a cliff. The ball lands 75 m away from the base of the cliff (R = 75m). What is the height of the cliff? What is the hitting velocity (the velocity of the ball before it hits the ground)? What is the total time of flight?
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Two charges of opposite sign and equal magnitude Q = 2.0 C are held 2.0 m apart. Determine the magnitude and direction of the electric field at the point P.
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Determine the number of photons with wavelengths between 705 and 713 nm escaping each second from a small opening in a cavity at a temperature of 9000 K. The opening behaves like a blackbody, and has a radius of 2.20 ✕ 10−2 mm.
---------------- photons/s
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Briefly describe how the formation of the following elements occurs in stars. What type of star is needed for the formation of each group of elements?
a) Helium
b) Carbon
c) Oxygen, Neon, and Iron
d) Tin and Uranium
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A car travels at 105 km/h on a level road in the positive direction of an x axis. Each tire has a diameter of 63.6 cm. Relative to a woman riding in the car and in unit-vector notation, what are the velocity V at the (a) center, (b) top, and (c) bottom of the tire and the magnitude a of the acceleration at the (d) center, (e) top, and (f) bottom of each tire? Relative to a hitchhiker sitting next to the road and in unit-vector notation, what are the velocity V at the (g) center, (h) top, and (i)bottom of the tire and the magnitude a of the acceleration at the (j) center, (k) top, and (l) bottom of each tire?
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A 2.90-kg ball, moving to the right at a velocity of +1.53 m/s on a frictionless table, collides head-on with a stationary 6.20-kg ball. Find the final velocities of (a) the 2.90-kg ball and of (b) the 6.20-kg ball if the collision is elastic. (c) Find the magnitude and direction of the final velocity of the two balls if the collision is completely inelastic.
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#2a.Three point charges are located in the x-y plane. q1 = -42.6 nC at (0.00, +3.60 cm), q2 = +45.4 nC at (-6.80 cm, 0.00) and q3 = -28.4 nC at (+8.20 cm, -9.40 cm). Determine the x component of the net electric field at the origin (0.00 m, 0.00m), due to the charges. Give your answer in the form "[+/-a.bc x 10^(x) N/C]i". Note that i is the unit vector in the x direction.
#2b. Determine the y component of the electric field at the origin. Give your answer in the form "[+/-a.bc x 10^(x) N/C]j" where j is the unit vector along the y axis.
#2c. Determine the magnitude of the net electric field at the origin. Give your answer in the form "a.bc x 10^(x) N/C".
#2d. Determine the angle of the net electric field at the origin. Use the +Y axis as your reference direction and move counter-clockwise. Give your answer to the nearest degree in the form "bc.d" degrees.
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A uniform magnetic field exerts a force on a moving charge which is equal to the charge times the vector product of the velocity and the magnetic field. Can this force change the magnitude of the velocity of the charge? Explain. Can both uniform electric and magnetic fields exist (for non-zero fields) where the net force on a charge is zero? If so, what are the constraints on the fields? If not, why not?
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