A spacecraft antenna is at an angle of 10° relative to the axis of the spacecraft. If the spacecraft moves away from the earth at a speed of 0.70c, what is the angle of the antenna as seen from the earth?

been having some trouble with this problem: Michelson used rotating mirrors, similar to those shown below, to calculate the speed of light. Light is emitted from the light source, reflects from mirror surface X to the plane mirror, and then to the position of surface Z. By the time the light moves from the X to Z position, mirror surface X will have moved to the position of mirror surface Z. The light then continues to the observer. The distances from the light source and the observer to the rotating mirrors are negligible. The distance from the rotating mirrors to the plane mirror is 35.0 km.If the mirrors are rotating at 480 rev/s, the speed of light calculated from the given information is

It has been proposed that spacecraft could be propelled by emitting intense beams of EM radiation from their tails rather than high-velocity chemical exhaust. This could reduce the fuel load required, which is very large for chemical rockets. Suppose a spacecraft (M = 250,000 kg) is floating in empty space at rest relative to a nearby space station. It then emits a very powerful 10.0 MW beam of laser light for one full day from its tail. Calculate the velocity acquired by the vehicle relative to the space station due to this emission of EM radiation

What is the wavelength, in fm (femtometers, or 10^-15 m), of a proton travelling at 90% of the speed of light?

A spherical star with radius 6.96 x 105 km and rotating with angular speed 3.92 x 10-5 rad/s collapses into a spherical neutron star without loss of mass.  The neutron star emits a beam of X-rays directed radially outward that can be seen by an observatory on the earth at a distance 5.28 x 1014 km from the star.  The X-ray beam sweeps past the earth with a tangential speed 7.16 x 1015 km/s each time the neutron star makes a full rotation.  During the collapse, angular momentum was conserved.  The radius of the neutron star is

Your video analysis of the motion of a marble gives it position in frame 23 as (x23, 923) = (0.134 m, 0.120 m) and its position in frame 24 as (x24, Y24) = (0.122 m, 0.112 m). You esti- mate that you can measure the x and y positions with uncertainty +0.003 m. The frame rate of the video is 30 frames/s, which means the time interval between frames is At = 0.033 333 s. The uncertainty of the frame rate of a video camera is VERY small. For the sake of this prob- lem, use (At) = 1 x 10-6 s. The mass of the marble is (2.031 +0.001) x 10-2 kg. Calculate the following quantities: 1. The value of the velocity component U = Xi+1Xi At and its uncertainty, Yi+1 Yi = and its uncertainty, At 2. The value of the velocity component vy 3. The value of the velocity magnitude v = 4. The value of the momentum component p 5. The value of the momentum component Py = muy and its uncertainty, and 6. The value of the kinetic energy K = =mv² = m(v²+v²) and its uncertainty. v2+2 and its uncertainty, = mv, and…

A person on earth communicating via radio transmission with an astronaut on the moon asks a question. At the time of transmission, the moon is 3.843.84 × 10105 km from the earth, and the speed of radio waves is 3.003.00 × 10108 m/s. How long must the person on earth wait for a response if the astronaut answers 5.005.00 s after the message is received?