This is Science not MathCertain high-frequency radiations are likely to cause harm to astronauts landing on Mars. A detector for which type of electromagnetic radiation is most suitable to study this harmful radiation on Mars?

Infrared

Radio waves

Ultraviolet

Visible light

Answers

Answer 1
Answer:

Answer:Third option is correct.

Step-by-step explanation:

Certain high-frequency radiations are likely to cause harm to astronauts landing on Mars.

Ultraviolet is the most suitable to study this harmful radiation on Mars.

It has highest frequency than X-rays but shorter than visible rays.

It is harmful is nature as it causes painful sunburns and premature ageing of the skin etc.

Hence, Third option is correct.

Answer 2
Answer:

Answer:

Given the options:  Infrared, Radio waves, Ultraviolet and Visible light, ordering them by frequency (for highest to lowest) we get:

Ultraviolet

Visible light

Infrared

Radio waves

Knowing that high-frequency radiations are likely to cause harm to astronauts landing on Mars, then the detector of Ultraviolet is most suitable

Step-by-step explanation:


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Help me with this question thanks

Answers

Answer:

see below

Step-by-step explanation:

3 > t/3

Multiply each side by 3

3*3 > t/3 *3

9 > t

t < 9

There is an open circle at 9, since  the symbol is  less than

The line goes to the left.

Answer:

arrow going from 9 to -infinity (open circle)

Step-by-step explanation:

equalize equation by multiplying both sides by 3 to obtain the equation 9>t

then simply plug in numbers to see if they check out, ie: 3> 4/3 makes sense, but 3> 10/3 doesn't.

Draw the arrow to accommodate for the answers that DO fit.

open circle, because it doesn't work for t=9

3 over 4 n minus 18 equals 1 over 4 n minus 4

Solve

Answers

n=28. Step 1: Subtract 1/4n from both sides.34n−1814n=14n−414n12n−18=−4Step 2: Add 18 to both sides.12n−18+18=−4+1812n=14Step 3: Multiply both sides by 2.2*(12n)=(2)*(14)
3/4n - 18 = 1/4n - 4
3/4n = 1/4n - 4 + 18
3/4n - 1/4n = -4 + 18
2/4n = 14
1/2n = 14
n = 14 × 2
n = 28

Factorise 2x squared -5x -12

Answers

2x^2-5x-12 guess (2x+3)(x-4) works 2x^2+3x-8x-12 2x^2-5x-12 (2x+3)(x-4)

Answers

AAAA
BBAB
ABAB
ABBB
BABA
(I can choose multiple)

Answers

Answer:

BBAB, ABAB, and BABA

Step-by-step explanation:

Use the probability/combination theorem.

Choose and appropriate metric unit for the height of a giraffeA) Milliliter
B) Liter
C) Gram
D) Meter

Answers

THE ANSWER İS; D.
BECAUSE; IT İS MEASURED BY METERS. :)

GOOD LUCK. :)

Ballpoint pens cost $1.50 a dozen for the first 200 dozen a store buys from a wholesaler and $1.25 a dozen for those bought in addition to the first 200 dozen. If the store buys 250 dozen pens from the wholesaler, then what is the average cost of ballpoint pens per dozen.

Answers

Solution:

We are given that

Ballpoint pens cost $1.50 a dozen for the first 200 dozen a store buys from a wholesaler.

$1.25 a dozen for those bought in addition to the first 200 dozen.

we have been asked to find

If the store buys 250 dozen pens from the wholesaler, then what is the average cost of ballpoint pens per dozen.

Cost of first 200 dozens of pens=1.5*200=300dollars

Cost of 50 dozens of pens =50*1.25=62.5 dollars

Total cost of 250 dozens of pens=300+62.5=362.5dollars\n

Average cost per dozen=(362.5)/(250)= 1.45dollars