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3 years ago

How much force is required to accelerate a 2kg mass at 3 m/s2? answer key?

Physics

1 answer:

mr Goodwill [35]3 years ago

4 0

F = ma so u can plug in the given numbers and solve:

F = (2)(3)

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Please help asap

Deffense [45]

Answer:

Explanation:

The dimension less constants are the constants having no dimensions and also have a constant value.

For example, 1, 2, 3... numbers, e (exponent), $\pi$ , etc.

The dimension less variables are the variables having no dimensions.

For example, refractive index, angle, strain, etc.

7 0

3 years ago

There are two different isotopes; X and Y, both contain the same number of radioactive substances. If sample X

antiseptic1488 [7]

Answer:

Half life refers to the time for 1/2 of the radioactive atoms to decay.

Suppose that X has a half life of 10 days and Y has a half life of 20 days

If both start out with 1000 radioactive atoms then after 20 days

X would have 250 radioactive atoms and Y would have 500 atoms

The rate of decay is greater for the shorter half life:

In the example given X must have the smaller rate of decay because it has a longer half life.

6 0

3 years ago

_____ replacement involves one element replacing another element in a compound.

Scorpion4ik [409]

Answer:

Single replacement

Explanation:

A single replacement reaction is a reaction in which the less reactive elements are replaced by the more reactive element in a compound. This is so because the more reactive element are higher in the electrochemical series element than the less reactive elements

3 0

3 years ago

Which of the following is an obstacle to creating computer-based models for tracking a hurricane?

AnnZ [28]

Forecasters must consider a large number of variables that affect the path of the storm.
This makes it difficult to create computer-based models because all of these variables are hard to incorporate.

5 0

3 years ago

Read 2 more answers

Suppose you add two vectors A and B . What relative direction between them produces the resultant with the greatest magnitude? W

Akimi4 [234]

Answer:

Same direction to produce maximum magnitude and opposite direction to produce minimum magnitude

Explanation:

Let a be the angle between vectors A and B. Generally when we add A to B, we can split A into 2 sub vectors, 1 parallel to B and the other perpendicular to B.

Also let A and B be the magnitude of vector A and B, respectively.

We have the parallel component after addition be

Acos(a) + B

And the perpendicular component after addition be

Asin(a)

The magnitude of the resulting vector would be

$\sqrt{(Acos(a) + B)^2 + (Asin(a))^2}$

$= \sqrt{A^2cos^2a + B^2 + 2ABcos(a) + A^2sin^2a}$

$= \sqrt{A^2(cos^2a + sin^2a) + B^2 + 2ABcos(a)}$

$= \sqrt{A^2 + B^2 + 2ABcos(a)}$

As A and B are fixed, the equation above is maximum when cos(a) = 1, meaning a = 0 degree and vector A and B are in the same direction, and minimum with cos(a) = -1, meaning a = 180 degree and vector A and B are in opposite direction.

8 0

4 years ago