a steel beam is 98m long is moving past the earth observers on earth measure the...
Practice Problem 27.3 SOLUTION A spaceship flies past earth with a speed of 0.980c (about 2.97 x 10 m/s) relative to earth. A crew member on the spaceship measures its length, obtaining the value 400 m. What is the length measured by observers on earth? SET UP The length of the spaceship in the frame in which it is at rest (400 m) is a proper length in this frame, corresponding to lo in We want to find the length...
Consider 2 observers moving toward each other at high speed. One fires a light beam toward the other at speed c. What speed v does the second observer measure for the light beam? (a) v > c (b) v = c (c) v < c (d) Depends on magnitude and direction of relative speed of observers.
a spaceship of proper length 50 m is moving away from the earth at a speed of .8c . according to the observes in the ship , their journey takes 6.0 hours . according to observers on earth , what is the length of the ship and how long does the journey take ?
A spaceship at rest on the earth has a length of 120m and a mass of 16,000kg. Then the spaceship begins to move away from the earth at 3/4 speed of light. If the spaceship sends out a second ship away from the earth on what observers on the spaceship think is 1/2 speed of light, how fast do the observers on earth think the second ship is moving? If the spaceship sends out a second ship toward the earth...
Object A is moving past earth 80% the speed of light (0.8c). Object B is moving past earth 99% the speed of light (0.99c). What is the speed of object B relative to object A? Please show your work, I need help setting up the problem.
the spacecraft traveling at 0.99c continues on to space station positioned 1.5x10^9km from earth(according to earth measurements). how many hours, as measured on earth and as measured on the spaceship of food and air would the astronauts in the spacecraft need if the continue at a speed of 0.99c need to get there? 1. how far would the astronauts on the moving space ship think the distance from earth to the space station was? 2.suppose a light beam from earth...
A spaceship is moving past Earth at 0.99c. The spaceship fires two lasers. Laser A is in the same direction it is traveling, and Laser B is in the opposite direction. How fast will the light from each laser be traveling according to an observer on Earth? Select one: a. The light from Laser A will be traveling at 1.99c, the light from Laser B at 0.010 b. The light from Laser A will be traveling at c, the light...
A meterstick moves past you at high speed. In your reference frame, you measure that the length of the meterstick is only 1 foot. How fast is the meterstick moving? a) 0.9071c b) 0.9524c c) 0.8660c d) 0.7670c
Steel Beam A beam used in construction is made of steel, which has a coefficient of linear expansion of 1.3 x 105 K1. The beam is 30 m long at a temperature of 1635 K when it is made. As it cools, the temperature of the beam decreases to 300 K 1) What is the change in the length of the beam due to cooling? m Submit 2) If the mass of the steel beam is 390 kg and the...
a steel beam is 10m long at 10 degrees. By how much does it contract of the temperature drops to -10 degrees?