Which data set has the smallest standard deviation? a. 7, 8, 89, 1005, 23400, 5, 3 b. 1000, 1001, 1002, 1000, 1001, 1001 c. 55, 90, 34, 78, 15, 20, 19 d. 1, 9, 120, 9, 1, 1, 9

Janelle made a hypothesis bout the uneven temperatures inside her house during winter. she believes that 50% of the ducts are blocked and she plans to investigate. if she wants to prove her hypothesis using scientific processes what should she do next?

The earth exerts a gravitational force of 500 n on amy. what is amy’s mass in kg?

On a horizontal frictionless surface, a small block with mass 0.200 kg has a collision with a block of mass 0.400 kg. immediately after the collision, the 0.200 kg block is moving at 12.0 m/s in the direction 30° north of east and the 0.400 kg block is moving at 11.2 m/s in the direction 53.1° south of east. use coordinates where the +x-axis is east and the +y-axis is north.(a) what is the total kinetic energy of the two blocks after the collision (in ) what is the x-component of the total momentum of the two blocks after the collision? (indicate the direction with the sign of your ) what is the y-component of the total momentum of the two blocks after the collision? (indicate the direction with the sign of your answer.)