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2 years ago

7

haun wants to enter the science fair at his school. he has a list of ideas for his project. which questions could be answered th

rough scientific investigations. check all that apply

1 answer:

Allisa [31]2 years ago

6 0

Correct Answer:

- Does pressure have an effect on the volume of a gas?

- Which brand of soap is the best for cleaning grease off dishes?

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URGENTEEEEEEEEEEEEEE

OverLord2011 [107]

Answer:

no habl

Explanation:

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2 years ago

How many oxygen atoms are used to bond with sulfur in the compound "sulfur dioxide"?

kherson [118]

2 oxygen atoms are used to bond with sulfer

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3 years ago

Read 2 more answers

Which of the following is NOT a

Liula [17]

Answer:B

Explanation:

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3 years ago

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A bat can detect small objects such as an insect whose size is approximately equal to the wavelength of the sound the bat makes.

slamgirl [31]

Answer:

size of insect = wavelength = 16.1 mm

Explanation:

Since the bat can detect the size of small insects which are of size equal to the wavelength of sound in air

So here we can say that the wavelength of sound is the ratio of speed of sound and its frequency

here we know that

speed of sound in air is 536 m/s

frequency of sound is 33.3 kHz

so here we can say

$\lambda = \frac{v}{f}$

$\lambda = \frac{536}{33.3 \times 10^3}$

$\lambda = 0.0161 m$

$\lambda = 16.1 mm$

7 0

3 years ago

What is the kinetic energy of a golf ball with a mass of 0.046 kg traveling at 15.5<br> m/s?

Serjik [45]

Answer:

<h2>5.53 J</h2>

Explanation:

The kinetic energy of an object can be found by using the formula

$k = \frac{1}{2} m {v}^{2} \\$

m is the mass

v is the velocity

From the question we have

$k = \frac{1}{2} \times 0.046 \times {15.5}^{2} \\ = 0.023 \times 240.25 \\ = 5.52575$

We have the final answer as

<h3>5.53 J</h3>

Hope this helps you

3 0

3 years ago