Astudent conducted an experiment that used two rose plants to determine if a liquid formula for fertilizer was better than a dry formula. he tested each fertilizer on a single plant for one month, and he concluded that the liquid formula was better. when he described his conclusion to his teacher, she told him he needed to conduct additional trials. the teacher most likely asked for additional trials because a. she did not believe the new formula plants grow better than the old formula. b. it was necessary to see data from more plants before the conclusion could be accepted. c. it was necessary to have tested the fertilizer on different kinds of plants. d. she thought he should test additional fertilizer formulas on the same two plants.

A33.1 g copper object is launched from a 1.5 m 30° steel incline positioned on the floor by being pulled up a string attached to a 50.0 g mass suspended vertically over a pulley. the object is projected towards a glass table where it lands when it is at the point along its trajectory with the lowest speed. it comes to a halt when it clears the opposite edge of the table. it then falls and lands on 9 physics texts each 5 cm thick that are stacked on the floor on the opposite side of the table. assume that the table does not have a ledge and the rectangular object experiences 0.05 n of air resistance as it falls towards the books. how far and how long did the object travel and how fast does it hit the books. assume that at the moment the copper object leaves the incline, the massless string and ideal pulley break off

Player kicks a soccer ball from ground level and sends it flying at an angle of 30 degrees at a speed of 26 m/s. what is the horizontal velocity component of the ball to the nearest tenth of a m/s?

Astronomers discover an exoplanet (a planet of a star other than the sun) that has an orbital period of 3.87 earth years in its circular orbit around its sun, which is a star with a measured mass of 3.59 x 1030 kg. find the radius of the exoplanet's orbit.