Me now
abigail is testing the effects of three fertilizers on grass growth. she conducts multiple trials and collects data. abigail would like
to publish her research so gardeners will know which fertilizer to use on their grass.
what should abigail's next step be to validate her results?

When a book falls from a shelf to the ground without anyone pushing on it, no work is done on the book. true or false

The two stars in a certain binary star system move in circular orbits. the first star, alpha, has an orbital speed of 36 km/s. the second star, beta, has an orbital speed of 12 km/s. the orbital period is 137 d. a) what is the mass of the star alpha? b) what is the mass of the star beta?

Amachinist turns the power on to a grinding wheel, at rest, at time t = 0 s. the wheel accelerates uniformly for 10 s and reaches the operating angular velocity of 96 rad/s. the wheel is run at that angular velocity for 40 s and then power is shut off. the wheel slows down uniformly at 1.5 rad/s2 until the wheel stops. in this situation, the time interval of deceleration is closest to: