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charle [14.2K]
2 years ago
5

Which statements are correct? Check all that apply. A. An insulator slows the flow of heat. B. A conductor increases the flow of

heat. C. A conductor decreases the flow of heat. D. An insulator speeds up the flow of heat.
Physics
2 answers:
skad [1K]2 years ago
8 0

Which statements are correct? Check all that apply.

A compass is used to make circles and arcs in geometric constructions.

A rough sketch by hand is considered a geometric construction.

Geometric constructions are created with a compass and straightedge.

Protractors are used in geometric constructions to measure degree measures.

Rulers are used in geometric constructions to measure segment lengths.

the answer is 1&3

Anni [7]2 years ago
5 0
<span>A. An insulator slows the flow of heat. 
and 
</span><span>B. A conductor increases the flow of heat.
are both correct!</span>
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A stone is dropped from a cliff. What will be its speed when it was fallen 100 m?
Mars2501 [29]

Answer:

final velocity will be44.72m/s

Explanation:

HEIGHT=h=100m

vi=0m/s

vf=?

g=10m/s²

by using third equation of motion for bodies under gravity

2gh=(vf)²-(vi)²

evaluating the formula

2(10m/s²)(100m)=vf²-(0m/s)²

2000m²/s²=vf²

√2000m²/s²=√vf²

44.72m/s=vf

6 0
3 years ago
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The luxury liner Queen Elizabeth 2 has a diesel-electric powerplant with a maximum power of 90 MW at a cruising speed of 31.5 kn
AlexFokin [52]

Answer:

5558643.69 N

Explanation:

F = Force

v = Velocity = 31.5 knots

Converting to m/s

1\ knot=0.514\ m/s

31.5\ knot=31.5\times 0.514\ m/s=16.191\ m/s

Power is given by

P=Fv\\\Rightarrow F=\frac{P}{v}\\\Rightarrow F=\frac{90\times 10^6}{16.191}\\\Rightarrow F=5558643.69\ N

The forward force is exerted on the ship at this highest attainable speed is 5558643.69 N

5 0
3 years ago
Determine the amount of potential energy of a 5.0Kg book that is moved to three different shelves on a bookcase. The height of e
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Formula to find gravitational potential energy:
mgh
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g: gravitational acceleration
h: height (relative to reference level)

so the P.E. at 1.0.m is (5x9.8x1)= 49J
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P.E. at 2.0m is (5x9.8x2)=98J
8 0
3 years ago
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