A cross-country skier can complete a 7.5km race in 45min. What is the skiers average speed?

The velocity of a particle moving along the x axis is given by vx = a t - b t3 for t > 0, where a = 27 m/s 2, b = 3.1 m/s 4, and t is in s.

Write 806,000,000 in scientific notation. a. 8.06 x 108 b. 8.06 x 107 c. 8.06 x 1010 d. 8.06 x 109

Define thermodynamics?

What are characteristics of absorption spectra? Check all that apply. Light is absorbed, which produces characteristic lines. Light is emitted, which produces characteristic lines. Lines are dark on a visible light background.

Which chemical formula shows how atoms of the elements calcium (ca) and sulfur (s) would join together ionically? a. cas b. ca2s c. cas2 d. ca2s3

Does adding a neutron to an atom's nucleus makes it an ion?

What is the difference between a fault-block and upwarped mountains?

Which of the following is not one of the reasons to properly warm up before exercising? A. Develop overall flexibility. B. Increase blood flow to the muscles and raise body temperature. C. Prevent injuries such as strains sprains and muscle cramps.

you are not chilly when swimming in warm water. but when emerging from warm water on a warm summer day, you feel chilly if the wind is blowing. Explain

A Find the magnitude of the angular momentum of the second hand on a clock about an axis through the center of the clock face. The clock hand has a length of 15.0 cm and a mass of 6.00 g.