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A section of a sphere has a radius of curvature of 0.95 {\rm m}. If this section is painted with a reflective coating on both sides, what is the focal length of the convex side? If this section is painted with a reflective coating on both sides, what is the focal length of the concave side?
Two loudspeaker, 4.0 m apart and facing each other, play identical sounds of the same frequency. You stand halfway between them, where there is a max. of sound intensity. moving from this point toward one of the speakers, you encounter a min. of s..
An electromagnetic wave with frequency 56.0 Hz travels in an insulating magnetic material that has dielectric constant 3.72, What is the speed of propagation of the wave
A spherical charged shell of radius R1 is concentric with a spherical charged shell of radius R2=2R1. The surface density of outer shell is +4.0 uC/m2. The electric field out of the outer shell is 0.
A hot-air balloon is rising straight up with a speed of 1.47 m/s. Aballast bag is released from rest relative to the balloon when itis 9.87 m above the ground. How much time elapses before theballast bag hits the ground?
Given the mass of the rubber in the balloon is 1.40 g, what is the net vertical force on the balloon if it is let go, Calculate the buoyant force on a 2.00 L helium balloon.
A tuning fork vibrates at a frequency of 520 Hz. An out-of-tune piano string vibrates at528 Hz. How much time separates successive beats
5 kg of water at 60 degrees are put in contact with 1 kg of ice at 0 degrees and are thermally isolated from everything else. What is the change in entropy of the universe while the ice melts
An athlete starts at point A and runs at a constant speed of 6m/s around a round track 100 m in diameter, what is x component of this runner's average velocity between points A and B.
An atom is ionized so that it has only one electron. When the electron drops from the n = 4 shell to the n = 1 shell, What is the atomic number
n object of mass "m" specific heat "Cp" & surface area "As" is initially at a temperature "To". Rate of Heat gained by Object = Rate of Heat Lost by Gas m, Cp, h, A & Tg are all constants.
A 0.140 kg baseball is thrown with a velocity of 26.2 m/s. It is struck with an average force of 500.0 NM which results in a velocity of 37.0 m/s in the opposite direction
if the radius of curvature of the concave mirror is 15 cm, what is the position,nature and magnification of the image
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