Q: Q: What common air pollutant is characterized by its sharp odor and often triggers asthma attacks? Read this paragraph and choose the correct option from the provided answers: Nitrogen dioxide is a toxic gas with a sharp odor. It can irritate the eyes and throat and trigger asthma attacks. It is a major air pollutant. Choices: - plant dioxide - pigment dioxide - Carbon Dioxide - nitrogen dioxide A:
A: nitrogen dioxide

Q: Q: What is the measure of sound intensity levels? Read this paragraph and choose the correct option from the provided answers: Sound intensity levels are quoted in decibels (dB) much more often than sound intensities in watts per meter squared. Decibels are the unit of choice in the scientific literature as well as in the popular media. The reasons for this choice of units are related to how we perceive sounds. How our ears perceive sound can be more accurately described by the logarithm of the intensity rather than directly to the intensity. The sound intensity level in decibels of a sound having an intensity I in watts per meter squared is defined to be. Choices: - octaves - moles - centimeters - decibels A:
A: decibels

Q: Q: What is a substance that can not be broken down any further into other substances? Read this paragraph and choose the correct option from the provided answers: pure substance that cannot be broken down into other types of substances. Choices: - pure molecule - pure material - unbreakable substance - pure substance A:
A: pure substance

Q: Q: What is lowered when salts go into ion form? Read this paragraph and choose the correct option from the provided answers: Most of the body's resistance is in its dry skin. When wet, salts go into ion form, lowering the resistance significantly. The interior of the body has a much lower resistance than dry skin because of all the ionic solutions and fluids it contains. If skin resistance is bypassed, such as by an intravenous infusion, a catheter, or exposed pacemaker leads, a person is rendered microshock sensitive. In this condition, currents about 1/1000 those listed in Table 20.3 produce similar effects. During open-heart surgery, currents as small as 20 A can be used to still the heart. Stringent electrical safety requirements in hospitals, particularly in surgery and intensive care, are related to the doubly disadvantaged microshock-sensitive patient. The break in the skin has reduced his resistance, and so the same voltage causes a greater current, and a much smaller current has a greater effect. Choices: - charge - voltage - power - resistance A:
A: resistance