If you drop a toy piano that weighs 538 grams and a grand piano with a mass of 453,592 grams from a rooftop and release at the same time, which will hit the ground first ?

Are characterized by dry conditions, limited vegetation and wide temperature range. a.) tropical rain forests b.) deserts c.) grasslands d.) none of the above

Which pair of sentences is describing the same velocity? a. a car is parked. a car is moving in circles. b. a bus drives 40 miles per hour north. a truck drives 50 miles per hour north. c. a boy walks east at 6 kilometers per hour. a girl walks west at the same speed as the boy. d. valerie rides her bike south at 8 kilometers per hour. owen jogs south at 8 kilometers per hour.

The development of this new blg-free, hypoallergenic milk is based on a science that came to the forefront 150 years ago. what scientist's work provided the basis for such feats in biotechnology?