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Minchanka [31]
3 years ago
11

James had a fixation on how to best preserve fresh cut flowers. He tried various methods: adding bleach to the water, using filt

ered water, adding an aspirin tablet to the water, using a combination of sugar and water, using cold water, and using hot water. Over the course of his study, he came to the conclusion that while bleach changed the color of the plant, it did allow for the plant to last longer than the other changes. Based on this study, the dependent variable is: 1. Type of plant 2. Life of the cut plant 3. Color of the plant 4. Changes to the water
Physics
1 answer:
ycow [4]3 years ago
3 0
By US Fg u u high I’ll fucouoyog you go y DC oh dad dc Sc um c o CBC cyo FCC ztdA
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Ways that industry and agriculture use physical properties to separate substances
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They use size and weight

5 0
3 years ago
When using science to investigate physical phenomena, which characteristic of the event must exist?
Vesna [10]

The correct answer is B. Measurable

Explanation:

The use of science to investigate a phenomenon implies using measurements and observations to better understand a phenomenon or test a hypothesis. Moreover, science focuses on natural phenomena that can be objectively studied through measurement instruments such as a thermometer, balance, hydrometer, etc.

In this context, for a phenomenon to be studied by science this needs to be measurable because the use of precise instruments as wells as numbers allow scientist to analyze and understand a phenomenon. Moreover, phenomena that depend on personal perspectives and cannot be measure is considered as non-scientific.

6 0
3 years ago
Gaseous helium is in thermal equilibrium with liquid helium at 6.4 K. The mass of a helium atom is 6.65 × 10−27 kg and Boltzmann
chubhunter [2.5K]

Answer:

162.78 m/s is the most probable speed of a helium atom.

Explanation:

The most probable speed:

v_{mp}=\sqrt{\frac{2K_bT}{m}}

K_b= Boltzmann’s constant =1.38066\times 10^{-23} J/K

T = temperature of the gas

m = mass of the gas particle.

Given, m = 6.65\times 10^{-27} kg

T = 6.4 K

Substituting all the given values :

v_{mp}=\sqrt{\frac{2\times 1.38066\times 10^{-23} J/K\times 6.4 K}{6.65\times 10^{-27} kg}}

v_{mp}=162.78 m/s

162.78 m/s is the most probable speed of a helium atom.

4 0
3 years ago
A pen contains a spring with a spring constant of 257 N/m. When the tip of the pen is in its retracted position, the spring is c
Mandarinka [93]

Explanation:

Below is an attachment containing the solution.

3 0
4 years ago
Which is an example of projectile motion?
stiv31 [10]
A person throwing a rock
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