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A 20 x microscope objective is designed for use in a microscope with a 17 cm tube length. The objective is marked NA = 0.45. What is the diameter of the objective lens?
a ball of mass 1.00kg moves due east at 3.00 m/s. a ball of mass 2.00 kg moves due south at 2.00 m/s. they collide at the origin. what is the final velocity of the other ball
The decay constant of Radon is .181/day. A sample of Radon contains 6.00x10^8 Radon atoms. How many atoms are left after 12 days
Two divers jump from a 5-m platform. One jumps upward at 1.90m/s , and the second steps off the platform as the first passes it on the way down. By how much does the first diver hit the water first (seconds)
The work needed to remove an electron from the surface of sodium is 2.3eV. Find the maximum wavelength of light
A platinum resistance thermometer has resistances of 220.0 when placed in a 0°C ice bath, What is the melting point of this substance
A 750 air-track glider attached to a spring with spring constant 10.5 is sitting at rest on a frictionless air track. A 475 glider is pushed toward it from the far end of the track at a speed of 118 .
Three 25.0-ohm resistors are connected in series across a 60.0-V battery. What is the equivalent resistance of the circuit and What is the current in the circuit
a cube of wood floating in water supports a 200g mass at the centre of its top face. when the mass is removed, the cube rises by 2cm. determine the volume of the cube
The moon's diameter is 3.48 × 106 m, and its mean distance from the earth is 3.85 × 108 m. Find the diameter of the moon's image on the slide film
A 4.0 kg block is released from rest at the top of a 30 degree frictionless incline. The block makes a head on elastic collision with another 3.0 kg block initially at rest on a horizontal surface at the bottom of the incline.
A 100 MeV particle decays into two particles. one of these two particles has a mass of 10 MeV and a speed of 3/5. what was the inital particle's speed
A box of mass of mass 2 kg is placed on a spring such that when the box is released, the spring will push the box directly upward. what is the maximum height the box will reach
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