Asource at rest emits light of wavelength 500 nm. when it is moving at 0.90c toward an observer, the observer detects light of wavelength: 26 nm 115 nm 500 nm 2200 nm 9500 nm

An astronaut floating in space is trying to use her jetpack to get back to her space station, but she is being pulled away by a nearby planet, as shown in the image below. her jetpack provides a constant thrust of 310 n. if she angles her jetpack in such a way that it cancels out the vertical force due to the planet's gravity, what is her net horizontal force? thaud 487 o a. 54.8 n toward the space station o b. 212.9 n toward the space station o c. 185.2 n toward the space station o d 956 n toward the space station