A train travels 94 kilometers in 5 hours, and then 84 kilometers in 3 hours. What is its average speed?

A projectile is fired straight up from ground level. After t seconds it's height is above the ground is h feet where h=-16t^2+144t. For what time period is the projectile at least 288 ft off the ground?

It is most accurate to describe the genetic material in the nucleus of the cell as

How can you demonstrate that charged objects exert forces, both attractive and repulsive

An ideal gas is compressed to half its initial volume by means of several possible processes. Which of the following processes results in the most work done on the gas? a. adiabatic b. isobaric c. isothermal d.

A planet orbiting the Sun will experience the largest gravitational force and greatest tangential speed when it is (blank) the Sun. a. farthest from b.

Power=170 watts time=20 seconds

What is the charge of alpha, beta and gamma rays?

A pair of scissors is a complex machine. what simple machines make up a pair of scissors?

Methane gas absorbs red light, and methane clouds reflect blue light, giving Uranus and Neptune their distinctive blue colors. Why do Uranus and Neptune have methane clouds, but Jupiter and Saturn do not

A car traveled 1025 kilometers from El Paso to Dallas in 13.5 hours. What was it's average velocity?