What is the molality of a solution that contains 54 grams of NaOH dissolved in 1.50 kg of water? (The molar mass of NaOH 40.00 grams/moles.)

A siren on the top of the police car emits sound at frequency of 823 Hz. The car is approaching a bystander on a sidewalk at speed 39.5 m/s. What is the freguency the bystander hears? Assume the speed of sound in air to be 340 m/s.

An electromagnetic wave is produced by: a. an accelerating charged particle or changing magnetic fields b. an accelerating uncharged particle and changing magnetic fields c. a stationary charged particle and a magnetic field d.

Why the outer of the space ship covered with resaiants tile

Mark has brown hair. His wife, Maggie, also has brown hair. Mark and Maggie have four children. Three children have brown hair, and one child has blonde hair. What is the most likely explanation for this?

Sulfur and nitrogen oxide release into the atmosphere is most responsible for ozone depletion acid precipitation global warming eutrophication

High energy environments are most likely to contain which one of the following? a. large particles such as gravel b. silt-sized particles c. manganese nodules d. cosmogenous sediments e. clay-sized particles

Which description explains the flow of heat? from cold to hot from hot to cold from cool to warm from cold to warm

Stars set about how many minutes earlier each day? A. 8 B. 6 C. 4 D. 2

Which statement about polymers is true? 1. Polymers are substances that have relatively large molecules. 2. Oil and gas are the starting materials for making all polymers. 3. Fabrics such as cotton and silk are synthetic polymers. 4.

Can the world run out of carbon? Explain why you answered the way you did