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How many times brighter is a Cepheid variable of absolute magnitude 3 than a white dwarf of absolute magnitude +7? The Virgo cluster has a distance of 17 Mpc. Using Hubble's Law, determine the recessional velocity to this cluster.
Compute the most probable distance that a nitrogen molecule will traverse in tissue after 0.5 s if the molecule experiences 1012 collisions/s; assume that the mean free path in air is 10-7 m.
a toy cannon uses a spring to project a 5.39-g soft rubber ball. the spring is originally compressed by 4.93 cm and has
a block of mass 2.5 kg is placed at a distance d=0.300 m from the spring. from this posistion the block is projected toward the spring with a speed v
A narrow beam of light is incident normally on one face of equiangular glass prism of RI 1.45. Find the refractive index of this liquid and draw a diagram showing the path of rays
What would be the percentage change in volume of a cube of aluminum that measured 1.50 on a side when at the ocean surface. how much did the aluminum cube's volume change.
A disk of radius 12 cm, initially at rest, begins rotating about its axis with a constant angular acceleration of 8.1 rad/s2. Find the angular velocity of the disk
A tennis ball of mass m=0.057kg and speed v=24 m/s strikes a wall at a 45 degrees angle and rebounds with the same speed at 45 degrees. What is the direction of the impulse given to the ball
The length of each side of the square is w The electric circuit is initially a distance d away from an infinitely long wire carrying current I. as shown in the figure. The electric circuit is then moved away from the wire at a constant speed v. Wh..
You have a converging (convex) lens and a diverging (concave) lens and the magnitude of the focal length of each lens is 43.6 centimeter. Find which lens you should use in order to produce an image of a light bulb on a screen several meters away
A conducting spherical shell of inner radius b and outer radius c is concentric with a small metal sphere of radius a
The length of a beam increases by 1.35mm when its temperature is raised from 37.83oC to 96.34 oC. What is the length of the beam at the initial temperature
A 0.0450-N force parallel to the rails is required to keep the bar moving at a constant speed of 0.750 m/s. What is the magnitude of the magnetic field?
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