3. Using the F, m, a triangle, calculate the boy's mass. Use the "force

of gravity" listed above (300 N) and assume an acceleration due to

gravity of 10 m/s2. Make sure to show your work and include units in

your answer!

The early universe contained only one element. what was it

The human activities in two locations are described below: Location A: Wind turbines used for generating electricity Location B: Coal used to generate electricity Which statement is most likely true?

Take the same balloon that you rubbed against the fabric near a wall. What do you observe?

You illuminate the grating in a spectrometer at normal incidence θi=0° with a beam of light that has a wavelength of 6562.8 Å. The grating has exactly 600 lines per mm. a. What is the angular deflection of the first-order diffracted beam? b.

How does de-icing roads with salt negatively impact the environment? a. The road salt attracts deer that are then hit by motor vehicles. b. It removes necessary salt from the local water courses. c.

Which mixture can be separated based on differences in particle size of the components

What happens in an open circuit

When analyzing forces, it is allowable to break the motion and forces into horizontal and vertical components.

What is the density of a rock which has a mass of 35 grams and a volume of 7.0 cubic centimeters?

Which statement best describes the relative conductivity of semiconductors? a. They are the most conductive elements. b. They are the least conductive elements. c. They are more conductive than metals but less conductive than nonmetals. d.