Protons are positively charged and repel other protons. Which other particle is found in the nucleus and separates protons so that the strong force can hold the nucleus together? A) electrons B) neutrons C) protons D) quarks

A 19-year old soccer player extends their right knee from an initial angle of 20o to 140o in 2 s. If this movement began from rest, what was the angualr acceleration? Hint: convert angular displacement to radians (1 revolution = 360o = 2π radians).

If a pulley system with an actual mechanical advantage of 2,000,000 is used in lifting a 2,000 lb. car, what effort would be needed to move the car?

Each of the following elements is magnetic except A. aluminum B. cobalt C. nickel D. iron

A superball of mass m is dropped vertically from a height, h. if the impact time with the floor is t, what is the average force on the ball

A swimmer can swim in still water at a speed of 9.50 m/s. he intends to swim directly across the river that has a downstream current of 3.75 m/s. what is his velocity relative to the bank?

Identify characteristics of objective personality tests. -self-report -scientific -paper-and-pencil -questions about behavior -objective -potentially biased answers Multiple Choice-Psychology

The Pony Express was a mail delivery system in the Old West that used a series of men on horseback to deliver mail from St. Joseph, MO to Sacramento, CA along a trail that was 2000 miles long.

In the virtual lab, calculations were made of the predicted diffraction angle, using the formula θ ≈ StartFraction lambda over L EndFraction.

What trends were seen in Mendeleev's periodic table?

Through which medium would EM waves travel the fastest? A. The Ocean B. The Atmosphere C. Rocks