Current is the movement of positive charges called electrons

What is the relationship between heavy objects and inertia

1. On a hot summer day in the state of Washington while kayaking, I saw several swimmers jump from a railroad bridge into the Snohomish River below. The swimmers stepped off the bridge, and they hit the water 1.59 s later. How high was the bridge? 2.

The following four objects sit on a table on earth. which experiences the greatest normal force from the table? a. a book weighing 2 n b. a mug with a mass of 250 g c. a metal pen with a mass of 0.3 kg d.

Which is not a way to accelerate an object? a. speed it up c. change its direction b. slow it down d. apply balanced forces

A satellite of mass 4500 kg orbits the Earth in a circular orbit of radius of 7.2 * 106 m (this is above the Earth's atmosphere). The mass of the Earth is 6 * 1024 kg. What is the speed of the satellite?

A transparent film laminated to a fabric is identified in the study material as a. stretch fabric. b. PVC. c. a skin. d. two-faced fabric

Light from the sun travels through space to Earth's atmosphere. Which will light waves do when they move from empty space into matter made up of different gases? A. move at the same speed B. move faster as they transmit C. slow down and refract D.

A 12.5 kg box sliding on a frictionless flat surface tuns into a fixed spring which compresses at a distance x = 14.1 cm. the spring constant is 94.5 kN/m Find the initial speed of the box

An earth scientist who studies hydrosphere

In 1991 four English teenagers built an eletric car that could attain a speed of 30.0m/s. Suppose it takes 8.0s for this car to accelerate from 18.0m/s to 30.0m/s. What is the magnitude of the car's acceleration?