A 1500 kg race car accelerates at a rate of about 9M /s2 as to how much force does the engine need to create for this to happen

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?

Two people each hold the end of a rope and create waves by moving their arms up and down. this wave is best classified as a transverse wave because a) both the rope particles and the wave are moving in the same direction. b) the wave is moving up and down as the particles of the rope move horizontally. c) the wave is moving horizontally as the particles of the rope move up and down. eliminate d) the wave is moving in a parallel direction with the motion of the person's arms.

Which of these is a density dependent factor? a. epidemic b. earthquake c. drought d. hurricane