How are communication signals on the ground sent to spacecraft? A )The signals must be sent from ground stations to orbiting satellites and then on to spacecraft.

B )The signals are sent directly to spacecraft using radio waves.

C )The signals will not reach the spacecraft directly from Earth.

D )The signals must be changed to another form at ground stations to travel through space.

As you move from right to left on the periodic table the atomic radius fill in the blank

The diagram below shows the different phase transitions that occur in matter. which arrow represents the transition in which dew is formed?

The ozone molecule o3 has a permanent dipole moment of 1.8×10−30 cm. although the molecule is very slightly bent-which is why it has a dipole moment-it can be modeled as a uniform rod of length 2.5×10−10 m with the dipole moment perpendicular to the axis of the rod. suppose an ozone molecule is in a 8000 n/c uniform electric field. in equilibrium, the dipole moment is aligned with the electric field. but if the molecule is rotated by a small angle and released, it will oscillate back and forth in simple harmonic motion.what is the frequency f of oscillation?