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3 years ago

14

You should be extremely careful when handling a soldering iron. This is owing to the dangerous temperatures that can be reached

by a soldering iron, and is evidenced by the many preventable injuries caused by soldering irons in the technical trade profession.
a. True
b. False

1 answer:

Bogdan [553]3 years ago

3 0

I believe this is true

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explain why a balloon in hot water expands but balloon in ice water shrinks be sure to include information regarding the (1) num

svetlana [45]

I think that the correct answer would be 2.

The molecules in the air are always creating pressure. Countless molecules collide into everything every second, creating a constant force. Before the air in the balloon is heated, the molecules inside are creating as much pressure as the molecules outside, meaning that the balloon stays at equilibrium and neither expands nor contracts. When they get heated, however, the inside molecules start moving with more force. They create more pressure, causing the balloon to expand outward until the pressure equalizes.

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3 years ago

What is the sum of 130+125+191? A. 335. B. 456. C. 446. D. 426.

Vesnalui [34]

1. C- 446
2. A- 778
3. B- 400
4. A- 11

8 0

2 years ago

When a severe weather watch has been issued by the National Weather Service, what should you do?

Harman [31]

Answer:

Begin to prepare

Explanation:

Just took the test!

4 0

3 years ago

Read 2 more answers

The wavelength at which Earth’s emitted radiation is maximum is ______ at which the wavelength of the Sun’s emitted radiation pe

tatiyna

Answer:

inversely proportional to the temperature

Explanation:

Wein's displacement law states the wavelength at which Earth’s emitted radiation is maximum <u>is inversely proportional to the temperature</u> at which the wavelength of the Sun’s emitted radiation peaks.

λmax $= \frac{b}{T}$

where,

λmax is the maximum wavelength

b is a constant of proportionality called Wien's displacement constant (b = 2.897 × 10⁻³ m.K)

T is the absolute temperature in kelvins

6 0

4 years ago

A truck covers 40.0 m in 7.45 s while uniformly slowing down to a final velocity of 3.50 m/s.

astra-53 [7]

Answer:

(A) Original velocity will be 7.244 m /sec

(B) Acceleration will be $-0.5026m/sec^2$

Explanation:

We have given distance covers by truck s = 40 m

Time taken by truck to cover this distance t = 7.45 sec

Final velocity v = 3.50 sec

According to second equation of motion

$S=ut+\frac{1}{2}at^2$

$40=u\times 7.45+\frac{1}{2}\times a\times 7.45^2$

$7.45u+27.751a=40$ -----eqn 1

According to first equation of motion

v = u + at

So $3.5=u+7.45a$ -----eqn2

Solving equation 1 and 2

a = $-0.5026m/sec^2$

And u = 7.244 m /sec

(A) Original velocity will be 7.244 m /sec

(B) Acceleration will be

$-0.5026m/sec^2$

6 0

4 years ago