Why are peer reviews important?a. Scientists receive questions and criticism from their peers.
b. Data are checked for accuracy.
c. Scientists receive comments and suggestions from other scientists.
d. all of the abve

Answers

Answer 1

Answer: peer review is important because it is used by scientists to decided which results should be published in a scientific journal

Answer 2

Answer:

I would say the answer is D: All of the above

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A man on the moon with a mass of 90 kilograms weighs 146 newtons. The radius of the moon is 1.74 × 106meters. Find the mass of the moon.
What is the momentum of a 2-kg toy truck that moves at 10 m/s
A stuntman jumps from the roof of a building to the safety net below. How far has the stuntman fallen after 1.6 seconds?

If velocity decreases, mass increases or decreases?

Answers

If the velocity decreases, increases. This situation is based about the momentum of a body where it is equal to mass times velocity. Velocity is inversely proportional to mass. That is why mass increases if velocity decreases.

A wagon is pulled at a speed of 0.40metets/seconds by a horse exerting an 1,800 Newton's horizontal force. what is the power of this horse?

Answers

Given:

speed of 0.40meters/seconds

1,800 Newton's horizontal force

Required:

Power of the horse

Solution:

P = F(D/T) where P is power in watts, F is the force, D is the distance and T is time

P = (1,800N) (0.40 meters/seconds)

P = 720 Watts

Calcium hydroxide + hydrochloric acid mc012-1.jpg calcium chloride + waterWhich is the corresponding formula equation?

Answers

$Ca (OH)_2 + 2HCl \rightarrow Ca Cl_2 + 2H_2 O$

Explanation:

First of all, let's try to identify the different substances involved in the reaction:

- calcium hydroxide: calcium is the element $Ca$ , while hydroxide corresponds to the ion $OH^-$ . Calcium has 2 valence electrons, so the calcium ion is $Ca^(2+)$ , and since the ion $OH^-$ has only one negative charge, we need two of them to combine with the calcium ion, therefore: $Ca(OH)_2$

- hydrochloric acid: this is an acid, so with one ion of hydrogen $H^+$ , and the other element is the chlorine, which in the ion form is $Cl^-$ , so the hydrochloric acid is $HCl$

- calcium chloride: this is the combination of the calcium ion, $Ca^(2+)$ , with the chlorine ion, $Cl^-$ , so the compound is $CaCl_2$

- Water: this is given by $H_2 O$

so, the reaction is

$Ca (OH)_2 + HCl \rightarrow Ca Cl_2 + H_2 O$

However, this reaction is not balanced yet: in fact, we have 2 atoms of oxygen on the left and only one on the right. Moreover, we have 3 atoms of hydrogen on the left and only 2 on the right. Therefore, in order to balance it, we must write:

$Ca (OH)_2 + 2HCl \rightarrow Ca Cl_2 + 2H_2 O$

D) Ca(OH)2(s) + 2HCI(l) -> CaCl2(aq) + 2H2O(l)

Graph the following set of data using proper graphing techniques.Step 1. Label horizontal (X) axis and vertical (Y) axis correctly.
Step 2. Plot pair of values from data table (X and Y). You may use the calculator function STAT, EDIT.
Step 3. Draw a light “line of best fit”. Do NOT connect dots! You may use the calculator function STAT, CALC.

a. What kind of curve did you obtain?
b. What is the relationship between the variables?
c. What do you expect the distance traveled to be after 45 s?
d. How much time is required for the object to travel 74 m?

Answers

You would get perhaps a very slight curve upward (assuming distance is plotted along the x axis and time up the y axis), as the distance increases by about 10 each time, and usually the time in seconds increases by 1, but occasionally the time increases by 2
Not sure about the relationship, I guess you could call it a positive correlation, if that's the kind the question is looking for
I'd expect the object to have travelled 334m after 45 seconds, assuming that there are no more jumps in the data, because 12*4 = 48, so 91*4 = 364, then because 10m = 1s, subtracting 3s to get down to 45s means subtracting 30m, so as to get 334m. Honestly though, for a better result, you would need to draw out the graph and calculate from there to get a better answer
74m, being between 70 and 80m, means the time needs to be between 10 and 11s
I'd expect it to be 10.4s, because as we said earlier 10m = 1s, so 4m would equal 0.4s
Hopefully that helps you, I know the answers aren't of the best quality (I know I'm not particularly happy with some of them), but that's the best I can do for you on short-notice :)

Two balls, each with a mass of 0.844 kg,exert a gravitational force of 8.45 × 10−11 Non each other.How far apart are the balls? The value of the universal gravitational constant is 6.673 × 10−11 N m2/kg2.

Answers

The Universal Gravitation law is F=GMm/d^2
So: 8.45x10^-11=6,673x10^-11x0,844x0,844/d^2
d^2=1,78, so finale d=1,33m

Approximately how long does it take the Sun to orbit the center of the Milky Way Galaxy? A) 2 million years B) 20,000 years C) 2 billion years D) 200,000 years E) 200 million years