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AVprozaik [17]
2 years ago
15

List as many different body parts as you think of.can you think of at least ten?

Chemistry
1 answer:
posledela2 years ago
8 0
Arm, leg, foot, hand, head, finger, toe, nose, mouth, ears
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What is the energy of a photon with wavelength of 670.8?
Sliva [168]
<span>The velocity of a wave is calculated by v = λf. From this equation we can take the frequency f = v / λ and substitute in the energy equation to find a new equation for the calculation of the energy from the wavelength: E = hc / λ</span>


To calculate the photon energy, in eV (Electrovolt), when we have the value of the wavelength λ (necessarily given in Å - angstrom), we use an alternative equation given by:
E =  \frac{12400}{\lambda}

Data: 670.8 Å

Solving:
E = \frac{12400}{\lambda}
E = \frac{12400}{670.8}
\boxed{E \approx 18,4eV}
8 0
3 years ago
A piece of rubber has a mass of 495 kg and a volume of 355 liters. Will it float in water, which has a density of 1.0 g/mL?
hoa [83]
Compare the density of the rubber to water. If it is less that 1 g/mL then it floats in the water.

You must compare density in the same units. So convert to g/mL 

( \frac{495kg}{355L} )*( \frac{1000g}{1kg} )*( \frac{1L}{1000mL} ) = 1.39 g/mL

The rubber does not float in water.
6 0
3 years ago
You are asked to weigh approximately 0. 4g of acetylsalicylic acid to the nearest mg. When you enter the data in grams in your l
julia-pushkina [17]

Number of significant figures will be 1.

Given:

weight of acetylsalicylic acid = 0. 4g

Significant figures are the digits of value which carry meaning towards the resolution of the measurement. They are also called significant figures in chemistry. All the experimental measurements have some kind of uncertainty associated with them.

When we convert 0.4g acetylsalicylic acid to mg we get value 400mg

when we convert 400mg to gram we get value of 0.4 gram

Since 0 before a decimal is not significant so there is only one significant figure that is 4.

<h3>How do you determine the number of significant figures?</h3>
  • The zero to the left of a decimal value less than one is meaningless.
  • All trailing zeros that are placeholders are meaningless.
  • The presence of zeros between non-zero numbers is significant.
  • Non-zero numbers are all significant.
  • If a number contains more digits than the desired number of significant digits, it is rounded.
<h3>Why 'Hidden Figures' is so important?</h3>

It's an important story for a variety of reasons, and it comes at a time when people are looking to Hollywood more than ever to tell stories that represent them. Hidden Figures is that movie for many, and it's critical that everyone sees these women in action. This is why. This film tells a story that you've probably never heard before.

Learn more about Significant figure here:

<u><em>brainly.com/question/24491627</em></u>

#SPJ4

7 0
1 year ago
PLEASE HELP<br> Thanks to Einstein's equation E = mc² we now know that energy is equivalent to what?
Nitella [24]
Energy=mass x the speed of light squared.
4 0
3 years ago
Read 2 more answers
Yasir wants to determine if there is a relationship between room color and sleep. Based on his research, Yasir makes an educated
Helen [10]

Answer: B. An experiment that directly tests the hypothesis

Explanation:

Yasir didn’t really test his experiment he only ask people for the opinion on which color they like so he forget to actually do the experiment therefore the answer is b.

8 0
3 years ago
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