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valkas [14]
4 years ago
13

Which statement describes why scientists notation is useful

Physics
1 answer:
aniked [119]4 years ago
6 0

On the list of choices that you provided, there is no such statement.

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At its peak, a tornado is 74.0 m in diameter and carries 335-km/h winds. What is its angular velocity in revolutions per second?
artcher [175]

Answer:

0.399 rev/s

Explanation:

Given that,

The diameter of a tornado, d = 74 m

Radius, r = 37 m

Linear velocity, v = 335 km/h = 93.05 m/s

We need to find the angular velocity in revolutions per second. Let it is \omega. The relation between angular velocity and linear velocity is as follows :

v=r\omega\\\\\omega=\dfrac{v}{r}\\\\\omega=\dfrac{93.0556}{37}\\\\\omega=2.51\ rad/s

or

\omega=\dfrac{2.51}{2\pi}\\\\\omega=0.399\ rev/s

So, the angular velocity of the blade is 0.399 rev/s.

4 0
3 years ago
Plsss answer this plsss answer this plsss answer this plsss answer this ​
Virty [35]

Answer:

I dont see file

dndndndbnfbfbfbfbfbf

3 0
3 years ago
Read 2 more answers
you went to move a 41 kg bookcase to a different place in the living room. if you push with a force of 65 N and the bookcase acc
ivann1987 [24]

Answer:

the force of friction = fk = (uk)n = 402(uk)

the net force acting to accelerate bookcase = ma = (41)(0.12) = 4.9 N

the {assumed horizontal} push force = 65 N

so

65 - fk = 4.9

fk = 65 - 4.9 = 60 N

uk = 60/402 = 0.15 <= ANS

7 0
3 years ago
A vector has an x-component of -26.5 and a y-component of 43 units. Find magnitude and direction of vector
tatiyna

Answer:

The vector has a magnitude of 33.86 units and a direction of 121.64°.

Explanation:

To find the magnitude, you use the Pitagorean theorem:

||V|| = \sqrt{x^2 + y^2}= \sqrt{(-26.5)^2 + (43)^2} = 33.86 units

In order to find the direction, you can use trigonometry. You have to keep in mind, that as the y component of the vector is positive and the x component is negative, the vector must have an angle between 90 and 180°, or in the second quadrant of the plane.:

tan(\alpha) = \frac{y}{x} \\\alpha = tan^{-1}(\frac{43}{-26.5})= 180 - tan^{-1}(\frac{43}{26.5}) = 121.64° or, 58.36° in the second quadrant

6 0
4 years ago
What are the differences between forces and pressure​
slamgirl [31]

Answer:

Force is a push or pull action between objects. Pressure is force acting on a surface area of an object, thus it is force per unit area.

Explanation:

4 0
3 years ago
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