Lightning often strikes water.

a. True

b. False

A 30-kg aluminum block initially at 1408c is brought into contact with a 40-kg block of iron at 608c in an insulated enclosure. determine the final equilibrium temperature and the total entropy change for this process.

3. What is a tree growing from the energy it receives from the sun doing? a) It is taking advantage of energy flowing from low to high. b) It is taking advantage of energy flowing high to low.

A scientist discovered an elementary particle paired with another particle. It has a positive charge equal to two-thirds of the charge of an electron. How should the scientist categorize the particle? A.) Boson B.) Lepton C.) Photon D.) Quark

Where did Barbara make an error in placement of a nutrient?

The ratio of 1kWh to 1MeV

Which electromagnetic wave has the shortest wavelength? (A. Radio waves b. X-rays c. infrared rays or d. Visible light)

If blue light hits a red filter, what kind of light comes through the filter? a. red b. blue c. purple d. no light

The tip of a triangle is held 12.0 cm above the surface of a flat pool of water. A submerged swimmer in the pool sees the tip of the triangle at what distance above the water? Let the indices of refraction nwater = 1.33 and nair = 1.00.

Which one of the graphs below also corresponds to a historical form of record keeping? bar graph pictograph line graph pie chart

A 4-W night-light is plugged into a 120-V circuit and oper - ates continuously for 1 year. Find the following: (a) the current it draws, (b) the resistance of its filament, (c) the energy consumed in a year.