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Question: The wavelength of the K x-ray line for an element is measured as 0.794 angstrom. What is the element?
Please show how you obtained the answer.
A non conducting solid sphere of radius 2.90 cm carries a uniformly distributed positive charge of 7.70×10-9 C. Compute the magnitude of the electric field at a point 1.80 cm away from the center of the sphere. Compute the magnitude of the electric f..
At a rock concert, a meter reads 130 dB when placed 2.80 meters in front of a loudspeaker. Find what was the sound power output of the speaker assuming uniform, isotropic sound propagation
In a Young's experiment using sodium light, lamda=589 nm, the slits are 1.2x10^-6 m wide. You notice that every fourth fringe is missing. how many fringes appear on the screen
a spaceshipmo 10000 kg amp lo 42m is observed to be 42.2m long while traveling towards earth. determine the speed of
when two identical ions are separated by a distance of 2.1times10-10 m the electrostatic force each exerts on the
In a double-slit experiment, slits separated by 1.290e-4 m are illuminated by a coherent 571 nm light source. What is the angular position of the first bright fringe
Initially, an object is 12cm to the left of a convex lens of focal length 8.2cm, then a concave (diverging) lens of local length -9cm is placed 20cm to the right of the convex lens, find the Image distance from concave lens
IP Two point charges, the first with a charge of +3.45×10?6 C and the second with a charge of -4.10×10?6 C, Find the magnitude of the electrostatic force experienced by the positive charge
A large air conditioner has a resistance of 8.0?and an inductive reactance of 14. Find the average power consumed by the air conditioner
A piece of audio equipment is said to have a signal-to-noise ratio of 52 dB. Obtain the ratio of intensities of the signal and the background noise
A 1000 kg cart is rolling to the right at 3.5 m/s. A 70 kg man is standing on the right end of the cart. What is the speed of the cart if the man abruptly starts running to the left with a speed of 10 m/s relative to the cart?
A thermos contains 141 cm3 of coffee at 92.9 °C. To cool the coffee, you drop two 10.4-g ice cubes into the thermos. What is the final temperature of the coffee
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