Carry out these steps, and record the findings in the table. Use the gram scale to measure the mass of 2, 4, and 6 paper clips. Fill the graduated cylinder with 8.0 mL of water. Add 2 paper clips to the water in the graduated cylinder. Determine how much the volume of water increases. This increase in volume is the volume of the paper clips. Record the value. Repeat this process to find and record the volume of 4 paper clips and then 6 paper clips. Density is mass in grams divided by volume in cubic centimeters (cm3). One mL is equal to 1 cm3. Calculate and record the density of the steel used in the paper clips.

Comedians like to joke that the reason we haven’t been visited by intelligent life from elsewhere in the universe is that aliens have been monitoring earth’s broadcasts of intellectually embarrassing tv programs, like gilligan’s island, fear factor, the jersey shore, and the jerry springer showand so consider us far too primitive to merit a visit. let’s check the assertion that aliens could have been receiving them. tv programs are broadcast at a frequency of about 100mhz with about 100kw of total power in 30frames per second, which emanatesroughly uniformly in all directions. assume that interstellar space transmits these broadcasts without attenuation. no matter how smart they are, aliens would require at least one photon per frame to interpret our signals. findthe number of photons per unit time per unit area reaching a receiver on a possible planet in the nearest star system, which is about 4 light-years away (a light-year is the distance light travels in a year). if aliens aimed a receiver or detector directly at earth, how big (in diameter) would it have to be to receive a photon per frame

What is the angular momentum of the bar about the axle?

A5 foot by 5 foot box culvert is buried 6 feet beneath the surface of the ground. a crosssection of this very long culvert (into and out of the page) is illustrated below. assume that the soil in which the culvert is buried has the following properties: jt = 120 pcf, w = 12%, ko = 0.50, ka = 0.33, and kp = 3.00. calculate the total horizontal force per unit length of culvert (fh) felt on one of the vertical faces of the culvert.