Question:
Light from the Sun reaches us in nearly ______.
Answer:
8 minutes
Question:
Sound waves in air are ______.
Answer:
Longitudinal
Question:
What is called a device which reduces human effort?
Answer:
Admittance neuro-control
Question:
What is the potential energy of a body on the ground?
Answer:
Gravitational energy
Question:
Stars which appear single to the naked eye but are double when seen through a telescope are _______.
Answer:
Binaries
