Halfway though a cross-country meet, a runner's speed is 4m/s. In the last stretch, she increases her speed to 7m/s. What is her change in speed?

Which classification scheme is based on the brightness of a star as it appears to you in the night sky?

Wave 1 carries more energy than Wave 2. Wave 3 carries more energy than Wave 2. Keeping speed constant, the greatest amount of energy is carried by a wave with

The city bus traveled 30 miles in 30 minutes. What was its speed in mph? A. 2 mph B. 60 mph C. 16 mph

If Mike does 25.5 J of work lifting a book 1.5 m onto a shelf what is the mass of the book in kilograms

During World War I, the Germans had a gun called Big Bertha that was used to shell Paris. The shell had an initial speed of 2.61 km/s at an initial inclination of 81.9° to the horizontal. The acceleration of gravity is 9.8 m/s^2.

What's the net force acting on an 18-kg object if an acceleration of 3.0 m/s2 is produced?

What type of force slows you down as you slide across the floor? A. Strong nuclear force B. Friction C. Magnetic force D. Gravity

Scenario A: A ramp is used to lift a refrigerator a height of 12 m with a force of 110 N. The ramp is at an angle of 50° to the ground. Scenario B: A ramp is used to lift a refrigerator a height of 13 m with a force of 120 N.

The sun is 30 degrees above the horizon. it makes a 51 m long shadow of a tall tree. part a how high is the tree?

What can destroy stuff yet does not have any mass