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3 years ago

Since velocity describes both speed and direction you can call it

1 answer:

4 0

Since velocity describes both speed and direction, you can call it a "vector" quantity, and legitimately label it "velocity".

Since speed has no direction, it's a scalar quantity, and it's wrong to call it "velocity" as so many often do.

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Which best explains the direction of the moving force of air?. . A.. from warm temperatures to cold temperatures. . B.. from are

borishaifa [10]

Out of the choices given, the best choice to explain the direction of the moving force of air is from area o high pressure to areas of low pressure. The correct answer is B.

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3 years ago

Read 2 more answers

Light travels 300,000,000m/sec, and one year has approximately 32,000,000 seconds. A light year is the distance light travels in

dem82 [27]

A) 3 x 10 ^ 8
b) 3 x 10 ^ 5
c) 3.2 x 10 ^ 7
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e) 9.6 x 10 ^ 17 cm

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3 years ago

Why is the following situation impossible? A skater glides along a circular path. She defines a certain point on the circle as h

Arturiano [62]

Answer:

A skater glides along a circular path. She defines a certain point on the circle as her origin. Later on, she passes through a point at which the distance she has traveled along the path from the origin is smaller than the magnitude of her displacement vector from the origin.

So here in circular motion of the skater we can see that the total path length of the skater is along the arc of the circle while we can say that displacement is defined as the shortest distance between initial and final position of the object.

So it is not possible in any circle that arc-length is less than the chord joining the two points on the circle

As we know that arc length is given as

$L = R\theta$

length of chord is given as

$L_c = 2Rsin(\frac{\theta}{2})$

so here

$L > L_c$

$R\theta > 2R sin(\frac{\theta}{2})$

so we have

$\frac{\theta}{2} > sin(\frac{\theta}{2})$

6 0

3 years ago

In an HVAC system, the purpose of pneumatics is to serve as A. a controller B. conditional air flow C. an energy source D. a sou

Naya [18.7K]

Answer: A

Explanation:

A pneumatic control system uses compressed air as a method of control for HVAC systems. ... Each senor responds to changes in temperature, humidity, and static pressure as examples, to provide feedback in a control loop to open or close the actuator to meet the control set point.

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3 years ago

How to calculate the angle of a resultant

stiv31 [10]

Answer:

The direction angle θ of the resultant in the Polar (positive) specification is then θ = α + 60°. The Law of Cosines is used to calculate the magnitude (r) and the Law of Sines is used to calculate the angle (α).

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3 years ago