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il63 [147K]
3 years ago
14

Which Richter magnitude range can be recorded by instruments but isn't felt? A. less than 2.9 B. 3.0 – 4.9 C. 5.0 – 5.9 D. 6.0 a

nd higher
Physics
2 answers:
Mashcka [7]3 years ago
6 0

Answer:

A. Less than 2.9

Explanation:

Richter scale is a measure of the intensity of the earthquakes designed and developed by Charles Richter in 1935. Its value ranges from 1.0 to 9.0 and greater. The earthquakes having a Richter magnitude of less than 2.9 are minor earthquakes which are slightly felt by a few humans but can be recorded on a seismograph. Earthquakes with magnitude above 2.9 can easily be felt by humans.

algol [13]3 years ago
3 0

A. anything less than 3.0 magnitude on a richters scale usually can't be felt by humans but instruments can pick it up.

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A gas hot water heater is 65% efficient. The energy output to heat the water is 2.3 kWh.
Art [367]

Answer:

3.5 kWh

1.2 kWh are lost

Explanation:

65=2.3/Ein*100

0.65=2.3/Ein

Ein=2.3/.65

Ein=3.5

3.5-2.3=1.2 kWh

7 0
3 years ago
Sunspots are dark because ___________. a. the strong magnetic field inhibits the currents of hot gas rising from below. b. of sh
maxonik [38]

Answer:

a) the strong magnetic field inhibits the currents of hot gas rising from below.

Explanation:

Sunspots are dark because they are a little cooler than the photo sphere.

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4 0
3 years ago
Which of the following air conditions would be least likely to have precipitation?
Lynna [10]
The best and most correct answer among the choices provided by the question is the first choice "warm, dry air"


In meteorology, precipitation<span> is any product of the condensation of atmospheric water vapor that falls under gravity. The main forms of </span>precipitation<span> include drizzle, rain, sleet, snow, graupel and hail.</span>

I hope my answer has come to your help. God bless and have a nice day ahead!
7 0
3 years ago
Read 2 more answers
A football player who weighs 550 N stands indoors wearing her football boots. The boot’s
EleoNora [17]

Answer:

183333 Pa

Explanation:

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The area of blades in contact with the floor is = 30cm² = 0.003 m²

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3 0
2 years ago
Electromagnetic radiation is more common than you think. Radio and TV stations emit radio waves when they broadcast their progra
Ludmilka [50]

Answer:

Explanation:

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2. They have different Frequencies (f) that is frequency = 1/ wavelength

(f = 1/wavelength)

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6 0
3 years ago
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