Pls help I’m being timed!! The diagram shows the setup for an experiment involving a 1000 ml beaker, filled with 500 mL of water, sitting on a burner.
1000 ml
500 ml
Bumer
Which best describes the molecular motion of the water particles as the bumer supplies heat?
O A. The molecular motion will increase as less thermal energy is absorbed.
O B. The molecular motion will increase as more thermal energy is absorbed.
O C. The molecular motion will decrease as less thermal energy is absorbed.
O D. The molecular motion will decrease as more thermal energy is absorbed.

Abike rider starts from rest and accelerates 28.0 meters down a slope in 5.00 seconds. what is her acceleration? select one: a. 3.21 m/sec2 b. 1.75 m/sec2 c. 9.80 m/sec2 d. 2.24 m/sec2

Visualize the problem and identify special cases first examine the problem by drawing a picture and visualizing the motion. apply newton's 2nd law, ∑f⃗ =ma⃗ , to each body in your mind. don't worry about which quantities are given. think about the forces on each body: how are these consistent with the direction of the acceleration for that body? can you think of any special cases that you can solve quickly now and use to test your understanding later? one special case in this problem is if m2=0, in which case block 1 would simply fall freely under the acceleration of gravity: a⃗ 1=−gj^.

Engines for propeller-driven aircraft are limited in their maximum rotational speed by the fact that the tip speed of the propeller must not approach the speed of sound in air (mach i). taking 6 ft as a typical diameter for a propeller of a light airplane and 1100 fils as the speed of sound, find the upper limit on the rpm (revolutions per minute) of the propeller shaft.