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Light from a helium-neon laser (? = 630nm) is incident on a diffraction grating and then illuminates a screen that is 10 m away. If the bright diffraction fringes near ? = 0 are spaced 0.7 m apart, what is the spacing between the slits in the grating?
An air-filled parallel plate capacitor with a plate spacing of 1.20 cm has a capacitance of 4.30, Calculate the dielectric constant of the inserted material
A 10 uF capacitor carries an initial charge of 80 uC. If a resistance of 25 omega is connected across it, what is the initial current in the resistor
A hot-air balloon plus cargo has a mass of 1740kg and a volume of 11730m3. What is the density of the hot air in the balloon
A positively charged light metal ball is suspended between two oppositely charged metal plates on an insulating thread as shown below. After being charged once, plates are disconnected from the battery. define the behavior of the ball.
Consider a theoretical head-on collision between two carts of equal mass and equal speed. What is the total momentum after the collision
A diving board length = 5.60 that weighs 210 is supported by two pillars. One pillar is at the left end of the diving board; other is distance = 1.60 away. Find out the magnitude of force exerted by the left pillar while an 85.0 diver stands at th..
An electric vehicle starts from rest and accelerates at a rate of 2.8 m/s2 in a straight line until it reaches a speed of 18 m/s. How far does the vehicle travel from start to stop
An 8.66g bullet is fired into a 260g block that is initially at rest at the edge of a table of h = 1.07 m height, What is the initial horizontal velocity of the block as it flies off the table
A soap film with different thicknesses at different places has an unknown refractive index n and air on both sides. Find the ratio tmagenta/tyellow
A 10 gauge copper wire carries a current of 27 A. Assuming one free electron per copper atom, calculate the drift velocity of the electrons
Determine the force of gravity between earth (mass =6.0x10^24kg) and the moon (mass= 7.4x10^22kg). The average earth-moon distance is 3.8x10^8m.
An electron in a hydrogen atom makes a transition from the n=6 energy state to the ground state (n=1)
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