Use the kinetic energy formula KE = 0.5 mv2to complete the practice problems below. Remember, 1 J = 1 kg m2s2Also, velocity is v2KE / (0.5 x m)and mass is m = KE / (0.5 x v2What is the kinetic energy of a 150 kg object that is moving at a speed of 15 m/s?

Two red blood cells each have a mass of 9.0 multiply. gif 10-14 kg and carry a negative charge spread uniformly over their surfaces. the repulsion arising from the excess charge prevents the cells from clumping together. one cell carries −2.50 pc of charge and the other −3.10 pc, and each cell can be modeled as a sphere 7.5 μm in diameter. (a) what speed would they need when very far away from each other to get close enough to just touch? assume that there is no viscous drag from any of the surrounding liquid. answer is: 321 m/s how do i find this (b) what is the maximum acceleration of the cells in part (a)? answer is: 1.38e+10 m/s2 how did they find this answer

When a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical

The graph represents the distance a car travels over time while on the highway. which statement about the car's trip is accurate? a) the car does not move over time. b) the car travels at a constant velocity. c) the car's velocity increases constantly over time. d) the car's velocity decreases constantly over time.