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3 years ago

Which of the following does not accurately depict a scientific theory?

1 answer:

4 0

Scientific theories are not absolute and unquestionable truths: they are the best explanation of the data, but they can be challenged if new data is discovered or if a new theory is found that fits to and explains the data even better!
The best answer is d: this is not an accurate description of a scientific theory!
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The earth's surface absorbs ------of the sun's energy that reaches it.

RideAnS [48]

Answer:

Explanation:

three-quarters

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3 years ago

Read 2 more answers

What most directly determines an object's state of matter? (Please help)

Likurg_2 [28]

Answer:

I would say D

Explanation:

because the amount of energy in molecules of matter determines the state of matter

(if I'm wrong I'm sorry)

3 0

2 years ago

An 1800-W toaster, a 1400-W electric frying pan, and a 75-W lamp are plugged into the same outlet in a 15-A, 120-V circuit. (The

Sphinxa [80]

Answer:

a) Current drawn by toaster = 1800/120 = 15 A

Current drawn by electric fan = 1400/120 = 11.67 A

Current drawn by lamp = 75/120 = 0.625 A

b) Yes

Explanation:

Given:

Power of toaster = 1800 W

Power of electric frying pan = 1400 W

power of lamp = 75 W

applied voltage = 120 V

a) Now,

Power = Current × Voltage

thus,

Current = Power / voltage

since, all the devices are parallel. thus, the potential difference across each device will be same

therefore,

Current drawn by toaster = 1800/120 = 15 A

Current drawn by electric fan = 1400/120 = 11.67 A

Current drawn by lamp = 75/120 = 0.625 A

b) Total current drawn by the combination, I = 15 A + 11.67 A + 0.625 A = 27.295 A

since. I > 15 A fuse

hence, the combination will blow the fuse.

3 0

3 years ago

Optimists usually have a higher degree of wellness than pessimists.<br> O True<br> False

photoshop1234 [79]

Answer:

True

Explanation:

Studies regularly show that optimists are more likely to maintain better physical health than pessimists, including a 50% lower risk of cardiovascular disease and greater survival rates when fighting cancer.

5 0

3 years ago

Find the period of the leg of a man who is 1.83 m in height with a mass of 67 kg. The moment of inertia of a cylinder rotating a

Lady bird [3.3K]

Answer:

1.54 s

Explanation:

Considering that the legs constitute 16% of the total weight of the man then mass, $m= \frac {16}{100}\times 67=10.72 Kg$

The legs also constitute 48% of his height hence $H=\frac {48}{100}\times 1.83=0.8784 m$

The moment of inertia of a cylinder rotating about a perpendicular axis at one end is $\frac {ml^{2}}{3}$ hence $I=\frac {10.72\times 0.8784^{2}}{3}=2.757135974Kg.m^{2}$

We also know that the period is given by $2\pi \sqrt{\frac {I}{mgh}}$

Here, h=0.5H= 0.5*0.8784=0.4392 m

Taking g as 9.81 kg/m2 then

$T= 2\pi \sqrt{\frac {2.757135974}{10.72\times 9.81\times 0.4392}}\\=1.535132615 s\\\boxed{\approx 1.54 s}$

3 0

3 years ago