PLS HELP ASAP I WILL GIVE BRAINLIEST I RLLY RLLY NEED THIS :( 19. The current setup of the device launches the marbles at a speed of 9.05 m/s. If the
students adjust the launch angle from 51° to 35°, what effect will this change have on
the marbles' hang times?

20. During one launch, when the 4.0-gram marble is at the peak of its trajectory, moving to
the right, the only forces acting on it are the force of gravity, and a 0.01 N force of drag
to the left. Draw the free body diagram for this situation.

Which type of energy would have nothing to do with ironing clothes? a. heat b. chemical c. electrical d. mechanical

1. when conducting a test on what kind of music increases the growth of plants, all of the following would fail to meet to fair test standard except (1 point) using different kinds of plants. giving some plants more water than others. exposing the plants to different types of music. using nutrient-rich soil for one and lesser soil for others. 2. engineering uses scientific thinking to solve real-world problems. (1 point) true false 3. what does it mean to test a hypothesis? (1 point) pass a quiz on other scientists’ results analyze only the results from scientific sources not make assumptions about how an experiment will turn out see if the results of an experiment are what the scientist predicted

A980-kg sports car collides into the rear end of a 2300-kg suv stopped at a red light. the bumpers lock, the brakes are locked, and the two cars skid forward 2.6m before stopping.the police officer, estimating the coefficient of kinetic friction between tires and road to be 0.80, calculates the speed of the sports car at impact. what was that speed?