A toy airplane, attached to a force meter by a string, flies in a horizontal circle. Design two independent experiments to determine the magnitude of the sum of
forces (the net force) exerted on the airplane when it flies in a circle.

The density of a substance is 4.0 g/cm3. if a sample of the substance has a volume of 25 cm3 then what is the mass

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?

Your town is considering building a biodiesel power plant describe at least two advantages and two disadvantages