A boy is running with a kinetic energy of 810 j if the boy has a mass of 80 kg whats his speed?

What is the ratio of carbon atoms to oxygen atoms in the compound with the chemical formula CO2?

How does a rubber rod become negatively charged through friction? a. It touches a negatively charged object, and protons move off of the rod. b. It touches a positively charged object, and electrons move onto the rod. c.

A 2300 kg truck has put its front bumper against the rear bumper of a 2500 kg suv to give it a push. with the engine at full power and good tires on good pavement, the maximum forward force on the truck is 18,000 n.

The light outside tends to be softest at what time of day? Midmorning Noon Midafternoon Early evening

How do you find the speed of an electromagnetic wave? Multiply the wavelength by the frequency. Dvide the frequency by the wavelength. Add the wavelength plus the frequency. Divide the wavelength by the frequency.

A quarterback throws a football with an initial velocity v at an angle θ above horizontal. Assume the ball leaves the quarterback's hand at ground level and moves without air resistance.

Taking the direction west to be positive, and east to be negative, what is the average acceleration of a jet ski that goes from rest to 10 m/s west in 4 seconds? A. 2.5 m/s2 B. 0.4 m/s2 C. - 0.4 m/s2 D. - 2.5 m/s2

Which one of the following crystal structures has the fewest slip directions and therefore the metals with this structure are generally more difficult to deform at room temperature? a. BCC b. FCC c. HCP d. BCT

How are neutral atoms converted into anions?

Coulomb's Law explains which of the following