The threshold of hearing for humans is 30 decibels.
True
False

Answers

Answer 1

Answer: False. Thirty decibels is not the threshold for the human ear. The human ear can hear sounds between 0 to 140 dB. The so-called hearing threshold for humans is 0 dB. It does not mean that at this level there is no sound instead we just can't hear it.

Related Questions

A cyclist rides in a circle with speed 8.1 m/s. What is his centripetal acceleration if the circle has a radius of 27 m? A. 3.3 m/s^2 B. 2.4 m/s^2 C. 0.3 m/s^2 D. 1.8 m/s^2
How does an atom charge if all the electrons are removed
Which best describes how DNA is used as a molecular clock?The number of mutations in DNA is compared between two species. The total amount of DNA is compared between two species. The percent of carbon in DNA is compared between parent and offspring.< The total mass of DNA is compared between parent and offspring.
Which statement about motor development is true? a.Motor skills are interrelated. "b.Motor skills are separate, innate abilities. " c.Children acquire motor skills on a fixed maturational timetable. d.Children acquire motor skills in the sequence implied by motor norms.
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What effect did the Cold War have on the American space program?A. High levels of military spending deterred scientific research.
B. The need for nuclear weapons led to less sophisticated rocket technology.
C. American and Soviet scientific cooperation lessened political tension.
D. Competition with the Soviet Union spurred American space missions

Answers

The answer is D.Competition with the Soviet Union spurred American space missions.

♡♡Hope I helped!!! :)♡♡

Competition with the Soviet Union spurred American space missions.

The waste products of a nuclear fission powerplant can best be described asa. Small in quantity and not very dangerous.
b. Large in quantity and not very dangerous.
c. Large in quantity and very dangerously radioactive. Eliminate
d. Small in quantity and very dangerously radioactive.

Answers

The answer is D. small in quantity and very dangerously radioactive.

a.

-> the products are stable atoms with a much lower atomic number. For example, Uranium 238 commonly breaks down into strontium and xenon, both of which are stable and non-radioactive.

They are also low in quantity because of the precision involved in breaking down a large atom via neutron capture means that few fission reactions take place.

Hope I helped :)

Source: I studied nuclear physics in year 11

When two forces act on an object in the same direction the resultant force is equal to

Answers

When two (or more) forces act on an object, all in the same direction,
the resultant force is equal to the sum of the individual forces.

That's a big part of the reason why, when you're pushing a car, you
ask somebody else to come push it with you, in the same direction.

A positive charge is moving from the floor of a room toward the ceiling. A magnetic field runs from east to west. In what direction is the magnetic force on the moving positive charge?a. toward the north
b. toward the south
c. toward the east
d. toward the west
e. toward the floor

Answers

It will be in the same direction of the charge so it will be toward the north

The force of attraction between things that have mass is called ________________.

Answers

I would assume gravitation.

Calculate how much work is required to launch a spacecraft of mass m from the surface of the earth (mass mE, radius RE) and place it in a circular low earth orbit--that is, an orbit whose altitude above the earth's surface is much less than RE. (As an example, the International Space Station is in low earth orbit at an altitude of about 400 km, much less than RE