7. A metre stick is balance in the middle and has a force of 8 N hanging from a the 2 m mark. What force needs to hang from the 6 m mark in order to balance the metre stick?

What is the frequency of a light wave with a wavelength of 620nm

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?

What is the average speed of a car that travels 40mph for 1 hour and 60 mph in another hour will mark brainliest