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nignag [31]
3 years ago
5

A group of scientists have just concluded that all cow meat contains a bacteria that is harmful and in some cases deadly to huma

ns. They are
determined to share this information so that consuming beef would no longer be allowed. What is this an example of?
O A. peer-review
OB. policy for science
OC. science for policy
OD.
Step 4 of the scientific method
Physics
1 answer:
antiseptic1488 [7]3 years ago
4 0
The answer is B
Jjjjjjjjjjjjjjjhhhhhh
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The headlights of a typical truck are powered by a 12 V battery. What current do they draw if the resistance is 4.8 ohms?
vodomira [7]
Solve this using Olm's law, which relates current (C), voltage (V), and resistance (R). Olm's law says:
I \: (current ) ={\frac {V \: (voltage) }{R\:(resistance)}}

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6 0
4 years ago
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A 1.0-in.-diameter hole is drilled on the centerline of a long, flat steel bar that is 1 2 thick and 4 in. wide. The bar is subj
Dominik [7]

Answer:

The answers are

The average stress = 20000 lb/in²

The maximum tensile stress immediately adjacent to the hole

= 31076.92 lb/in²

Explanation:

To solve the question we have

Weight of tensile load = 30,000 lb

Width of steel bar = 4 in

Thickness of steel bar = 1/2 in

Average Stress = Force/Area  

Size of hole drilled = 1.0 in diameter

Available width at cross section where the 1.00 in diameter hole is drilled =

(4 - 1) in = 3 inches

Cross sectional area at the point of reduced cross section due to the drilled hole = Width × Thickness (Since the item is a flat bar)

= 3 in × 1/2 in = 1.5 in²

Therefore Stress = (30000 lb)/(1.5 in²) = 20000 lb/in²

the maximum tensile stress immediately adjacent to the hole.

Bending stress = \sigma_B= \frac{M_y}{I} where I = \frac{(0.5^2 + 4^2)}{12}

0.5*30000/I = 11076.92 lb/in²

Max stress = 31076.92 lb/in²

8 0
3 years ago
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What are the 7 electromagnetic waves in order from lowest to highest wavelength?
ozzi

The electromagnetic spectrum is divided into seven different frequency ranges which are from lowest to highest, radio waves, microwaves, infrared, visible light, ultraviolet, X-rays and gamma rays.

The electromagnetic spectrum includes electromagnetic waves with frequencies between one hertz and above 10²⁵ hertz, or wavelengths between thousands of kilometres and a small portion of the size of an atomic nucleus. The electromagnetic waves found within each of these bands are referred to by a different name. Starting at the low frequency(long wavelength), end of the spectrum, these are radio waves, micro waves, infrared, visible light, ultraviolet, x-rays and gamma rays. This frequency range is divided into separate bands.

To know more about electromagnetic waves:

brainly.com/question/29548891

#SPJ4

5 0
1 year ago
The person with the greatest ___ hits earth first
Alinara [238K]
Answer

A because that’s what I learned
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What is the relationship between frequency and pitch?
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In general, pitch increases more rapidly than frequency for tones below 1000 Hz and less rapidly for tones above 1000 Hz. That is, for frequencies above 1000 Hz a greater change in frequency is needed to produce a corresponding change in pitch.
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