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Alborosie
4 years ago
9

Why did most scientists reject Wegner's theory for nearly a half century?

Chemistry
1 answer:
PolarNik [594]4 years ago
3 0
Because Wagner could not identify cause of continental drift
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Which activity is the best demonstration of J. J. Thomson’s use of creativity in his work? making observations in his experiment
serious [3.7K]

The correct answer is making observations in his experiment.

In his cathode ray tube experiment J. J. Thomson proved that the cathode rays are indeed negatively charged particles. He then went on to calculate charge-to-mass ratio of the electron. J. J. Thomson’s pioneering work lest to the theory that the atomic structure is made up of charged particles.  

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3 years ago
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Which two reactions are opposites of each<br> other?
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How does movement determine what side we see of the moon
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8 0
4 years ago
An enzyme is discovered that catalyzes the chemical reaction:SAD --------&gt;HAPPY
jekas [21]

Answer: Km = 10μM

Explanation: <u>Michaelis-Menten constant</u> (Km) measures the affinity a enzyme has to its substrate, so it can be known how well an enzyme is suited to the substrate being used. To determine Km another value associated to an eznyme is important: <em>Turnover number (Kcat)</em>, which is the number of time an enzyme site converts substrate into product per unit time.

Enzyme veolcity is calculated as:

V_{0} = \frac{E_{t}.K_{cat}.[substrate]}{K_{m}+[substrate]}

where Et is concentration of enzyme catalitic sites and has to have the same unit as velocity of enzyme, so Et = 20nM = 0.02μM;

To calculate Km:

V_{0}*K_{m} + V_{0}*[substrate] = E_{t}.K_{cat}.[substrate]

K_{m} = \frac{E_{t}.K_{cat}.[substrate]-V_{0}*[substrate]}{V_{0}}

K_{m} = \frac{0.02*600*40-9.6*40}{9.6}

Km = 10μM

<u>The Michaelis-Menten for the substrate SAD is </u><u>10μM</u><u>.</u>

3 0
3 years ago
Which of these is correct regarding Thomson's cathode ray observations
uysha [10]

Answer:

c

Explanation:

8 0
4 years ago
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