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vodka [1.7K]
3 years ago
13

Answer these questions fast please:-

Physics
1 answer:
Andrew [12]3 years ago
5 0
2.Cotton, polyester, nylon, rayon or can also be made by wool
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When finding net force, why must you know the directions of the forces acting on an object?
Mariulka [41]
<h3>One reason we should know what the directions of the forces acting on an object is so we can know if we have to add or subtract. same = add together, opposite = subtract from each other. Also if we don't pay attention to the direction the Net force will be wont be accurate. There will be factors that will upset the calculation.So we must know the direction of the two forces because we have to know if we are adding or subtracting and if the answer is accurate. </h3>

<em>I hope this helps!.</em>

8 0
3 years ago
__________ is the most common type of stretching.
Verizon [17]

Answer: static stretching

Explanation:

e.g rubberband

6 0
3 years ago
Read 2 more answers
The CBR method of flexible pavement design gives an idea about the:
marta [7]

Answer:

A. quality of road-making material

Explanation:

The CBR method of flexible pavement design gives an idea about the:

A. quality of road-making material

B. traffic intensities

C. characteristics of soil

D. All of the above

The California Bearing Ratio (CBR) test is a penetration test used to evaluate the subgrade strength of roads and pavements. The results of these tests are used with the curves to determine the thickness of pavement and its component layers. it is the measure of the resistance of a material against the penetration of a standard plunger.

This can be used to determine the quality of road making material. CBR is expressed as the percentage of the actual load to the standard load.

3 0
4 years ago
Describe the political actions that led to successful conservation in both stories.
attashe74 [19]

Answer:

The political actions that led to successful conservation in both stories were what they call an FC company that makes the forest industry true. They make it out of a factory and it can make it very successful and accomplished.

Explanation:

6 0
3 years ago
A small laser used as a pointer produces a beam of red light 5 mm in diameter, and has a power output of 5 milliwatts. What is t
Nata [24]

Answer:

434.0 V/m

Explanation:

The power output of the laser is:

P=5 mW = 0.005 W

while the radius of the beam is

r=\frac{5 mm}{2}=2.5 mm = 0.0025 m

so the cross-sectional area is

A=\pi r^2 = \pi (0.0025 m)^2=2.0\cdot 10^{-5} m^2

So the intensity of the laser beam is

I=\frac{P}{A}=\frac{0.005 W}{2.0\cdot 10^{-5} m^2}=250 W/m^2

The intensity of a laser beam is related to the magnitude of the electric field by

I=\frac{1}{2}c\epsilon_0 E^2

where

c is the speed of light

\epsilon_0 is the vacuum permittivity

Solving the formula for E, we find

E=\sqrt{\frac{2I}{c\epsilon_0}}=\sqrt{\frac{2(250 W/m^2)}{(3\cdot 10^8 m/s)(8.85\cdot 10^{-12} F/m)}}=434.0 V/m

4 0
3 years ago
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