Find the standard deviation of 7, 11, 8, 10, 9 if necessary round your answer to the nearest tenth

Jason takes off from rest across level water on his jet-powered skis. The combined mass of Jason and his skis is 75 kg (the mass of the fuel is negligible). The skis have a thrust of 200 N and a coefficient of kinetic friction on water of 0.10.

In what way does ocean water move globally? A. Along cold-water currents from the Poles to the equator B. From the cold Western Hemisphere to the warm Eastern Hemisphere C. From high-pressure systems to low-pressure systems D.

You are riding in an enclosed train car moving at 90 km/h. If you throw a baseball straight up, where will the baseball land? a. In front of you. b. In your hand. c. Behind you. d. Can't decide from the given information.

What equipment is essential for filtering a solid from a liquid? A. Filter paper, funel, beaker, iron, ring, and stand B. Beaker, funel, filter paper, stirring rod, iron ring, and stand C. Beaker, funel, stirring rod, iron ring, and stand D.

13. Under what condition (if any) does a moving body experience no energy even though there is a net force acting on it? (2 marks)

You short-circuit a 9 volt battery by connecting a short wire from one end of the battery to the other end. if the current in the short circuit is measured to be 18 amperes, what is the internal resistance of the battery?

A student is trying to calculate the density of a ball. She already knows the mass, but she needs to determine the volume as well. Which of the following formulas can be used to calculate the volume of the ball?

Is there such a thing as real time weather radar? why not?

Luke and Carrie are driving down a straight section of the interstate at 70 mph in Luke's new convertible. Carrie is drinking a soda in the passenger seat.

A force produces power p by doing work w in a time t. what power will be produced by a force that does six times as much work in half as much time?