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Ainat [17]
3 years ago
10

A wire that is cold has less resistance than a wire that is hot True False

Physics
1 answer:
Vladimir79 [104]3 years ago
8 0
True because cooler particles have less kinetic energy in them
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You are an evolutionary biologist studying a population of bats in the rain forest in Brazil. Most of the population possesses m
Oxana [17]

Answer:

Option (B)

Explanation:

In the stabilizing natural selection, the extreme traits from both the ends are eliminated by natural selection and natural selection favors the intermediate trait. So over time individuals having the intermediate traits are selected over the individuals having extreme traits.

So here the population of the bat which possesses moderate wing length is selected over the individual with extreme traits like individuals with short wings and long wings. As a result, the population of moderate length wing bats increased.

Therefore the correct answer is (B)- stabilizing natural selection.

3 0
3 years ago
Use the specific heat values to answer the
Talja [164]

Answer:

3.0 g PB

Explanation:

6 0
3 years ago
Read 2 more answers
A 140 g mass is connected to a light spring of force constant 5 N/m that is free to oscillate on a horizontal, frictionless trac
photoshop1234 [79]

Answer:

Explanation:

mass attached m = .14 kg

force constant k = 5N / m

displacement

= amplitude of oscillation

A = .03 m

A ) period of motion = 2\pi\sqrt{\frac{m}{k} }

= 2 x 3.14 \sqrt{\frac{.14}{5} }

T = 1.05 s

B ) maximum speed of block = angular velocity x amplitude

= (2π /T)  x A

= (2 x 3.14 x .03) / 1.05

= .1794 m / s

17.94 cm /s

C )

maximum acceleration = angular velocity² x amplitude

= (2π /T)² x A

= (2π /1.05)² x .03

= 1.073 m / s²

D )

position

S = A cos ωt , ω is angular velocity

S = .03 cos(2πt /T)

= .03 cos 5.98 t

v =ω A sin(2πt /T)

= 5.98 x .03 sin5.98t

= .1794 sin5.98t

acceleration = ω²A sin5.98t

= 1.073 sin5.98t

7 0
3 years ago
A 0.8 kg bead slides on a curved wire, starting
TEA [102]

Answer:

vB = 12 m/s

W = 36 J

Explanation:

Potential energy converts to kinetic energy

½mv² = mgh

v = √(2gh)

vB = √(2(9.8)(7.1 - 0) = 11.796609... m/s

W = mg(hA) - mg(hB) = 0.8(9.8)(7.1 - 2.5) = 36.064 J

3 0
3 years ago
True or False: If the part you are designing is completely symmetric, you can complete the part by designing just half of the pa
Lana71 [14]

Given what we know, the statement that "if the part you are designing is completely symmetric, you can complete the part by designing just half of the part and using one mirror feature" is true.

<h3>Why is this statement true?</h3>

Symmetry is when something is exactly the same on either side.

This line can be drawn anywhere but is most commonly a vertical line splitting the object in question down the middle.

Since the object is identical on both sides, using a mirror to flip the completed half to the other side, will effectively give you the finished product.

Therefore, given that when something is entirely and perfectly symmetric it will be exactly the same on either side, it is true to say that by designing half of the end product and using a mirror effect to flip it to the other side, you can complete it.

To learn more about symmetry visit:

brainly.com/question/1597409?referrer=searchResults

5 0
3 years ago
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