Two concentric current loops lie in the same plane. the smaller loop has a radius of 3.8 cm and a current of 12 a . the bigger loop has a current of 20 a . the magnetic field at the center of the loops is found to be zero. part a what is the radius of the bigger loop? express your answer with the appropriate units. r r = nothing nothing submitrequest answer provide feedback next

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