Oxygen-18 has an atomic number of 8. how many neutrons are in this isotope?

8
10
18
cannot be determined

The two required components for a generator

Glass has a hardness that is in the middle of the hardness scale. what is the hardness of glass?

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