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1.) Uranium 238 has a half life of 1.41 x 10^17 sec if the earth is 5.5 billion years old what fraction of the original uranium 238 that was on earth when it formed is left2.) hydrogen emits red light at a wavelength of 656 nm if M = 2 what value of n does this wavelength represents?3.) you want to use a converging lens to magnify that an object 3 times. the lens has a focal length of 10 cm where should it be placed
A 26 kg gun is standing on a frictionless surface. The gun fires a .0573 kg bullet with a muzzle velocity of 323 m/s. The positive direction is that of the bullet immediately after the gun was fired. compute the momentum of the gun immedately afte..
An unstable particle with a mass equal to 3.34*10-27 kg is initially at rest. Find the masses of the fragments
Does it travel at the same speed the entire time?
Find the minimum compression of the spring needed to keep the block from falling, given that the coefficient of static friction between the block and the wall is 0.50
A circus performer stretches a tightrope between two towers. He strikes one end of the rope and sends a wave along it toward the other tower. find the tension in the tightrope
Now, a second resistor R2 of 3.2x10^5 ? is connected in parallel to the existing resistor in the circuit, and a second capacitor C2 = 4.20 µF is connected to the existing capacitor in parallel. What will be the new time constant
A cylindrical tank is to be designed to contain 5kg of compressed nitrogen at a pressure of 20MPa and temperature of 25?C. What are the external dimensions
Suppose that a point P in space-time with coordinates x = (x, x4) lies inside the backward light cone as measured in a frame S. This mean that x . x
A beam of light is traveling in air and strikes a material. The angles of incidence and refraction are 60.3° and 47.5°, respectively. Obtain the speed of light in the material
A slide projector has a converging lens whose focal length is 119.00 mm. How far from the lens must the screen be located if a slide is placed 122 mm from the lens
A bat emits chirping sounds of frequency 75 kHz while hunting for moths to eat. The bat flies east at 8 m/s. What is the frequency of the reflected sound detected by the bat
In a head-on collision, a car stops in 0.3s from a speed of 30 m/s. What is the force applied to the driver by his seat belt during the collision
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