Which element, represented by x, reacts with fluorine to produce the compound xf2? (1) aluminum (3) calcium (2) argon (4) sodium

1. You are driving south on the 405. You are in traffic so your speed is 35 miles per hour, (35 mi/hr). Calculate your speed in m/sec. Assume that there 1.609 meters in every mile. 2. The Moon takes 27.25 days to make one revolution around the Earth.

The sun radiates about 3.6 x 10^26 Joules of energy each second. How much mass does the sun lose each second?

How condensation affects the temperature of the area where liquids forms

In atoms, electrons surround the nucleus in A) random patterns B) specific energy levels C) orbits like the planets D) a "plum pudding" type arrangement

At what distance above the surface of the earth is the gravitational field 4.9 m/s^2

Whats an example of projectile motion

The fact that the sun rises and sets at different times during the day depending on the time of year is an example of a data trend. True or False

What sample of matter is a single substance

What is a hydraulic machine and what is its purpose? Explain how a simple hydraulic machine performs work.

Is the muzzle velocity a scalar or vector quantity?