calculate the following round off to the correct number of significant figures and express your result in scientific notation. A). (200.9) (569.3) B.) (0.000000513) (62.3x10^7)

Why are multiple trials important when carrying out an experiment?

Explain whether demand is likely to be elastic or inelastic for Big Macs. A. Elastic comma since many other fast food items could be considered close substitutes. B. Inelastic due to a lack of close substitutes. C.

If you weigh 690 N on the earth, what would be your weight on the surface of a neutron star that has the same mass as our sun and a diameter of 25.0 km? Take the mass of the sun to be ms = 1.99*1030 kg, the gravitational constant to be G = 6.

From where on Earth could you observe all of the stars during the course of a year? What fraction of the sky can be seen from the North Pole?

A rolling ball moves from x1=8.4cm to x2=-4.2cm during the time from t1=3.0s to t2=6.1s. what is its average velocity over this time interval?

How can the same material bend in one situation but break in another

According to Newton's first law of motion, what would happen to a car traveling at a constant velocity of 55 MPH to the west in the absence of an unbalanced force?

The Appalachian mountain range in the Eastern United States was once much taller than the Rocky mountain range in the Western United States.

Describe how lighting is just like you walking across a carpet and getting shocked

You need to raise a heavy block by pulling it with a massless rope. You can either (a) pull the block straight up height h, or (b) pull it up a long, frictionless plane inclined at a 15∘ angle until its height has increased by h.