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3 years ago

Which best compares radiation and conduction?

Physics

2 answers:

Marrrta [24]3 years ago

8 0

The last option is the right

Karolina [17]3 years ago

6 0

Answer:

The statements that best compares radiation and conduction are the following: both transfer thermal energy from warm objects to cooler objects and both can transfer energy through matter. The difference is that conduction is through direct heat transfer; whereas, radiation transfers heat through waves.

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A spinning disk is rotating at a rate of 5 rad/s in the positive counterclock-wise direction. If the disk is subjected to an ang

Anit [1.1K]

Answer:

ωf = 13 rad/s

Explanation:

The angular acceleration, by definition, is just the rate of change of the angular velocity with respect to time, as follows:
α = Δω/Δt = (ωf-ω₀) / (tfi-t₀)
Choosing t₀ = 0, and rearranging terms, we have

$\omega_{f} = \omega_{o} + \alpha *t (1)$

where ω₀ = 5 rad/s, t = 4 s, α = 2 rad/s2

Replacing these values in (1) and solving for ωf, we get:

$\omega_{f} = 5 rad/s + (2 rad/s2*4 s) = 13 rad/s (2)$

The wheel's angular velocity after 4s is 13 rad/s.

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3 years ago

On a distance-versus-time graph, _____.

babymother [125]

Answer:

Explanation:

The slope of the graph has the units of vertical axis divided by horizontal axis. This means that the slope of a distance vs time graph is distance/time, or velocity.

Slope is calculated by "rise over run" so C is incorrect.

Since the slope represents velocity, a constant slope equates to a constant velocity, hence B is incorrect. Same reasoning for D being incorrect: if the slope is zero, the object is not moving.

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3 years ago

Select the correct answer. Ben has $10 to spend on dinner. He can have a pizza delivered, drive to a burger place, or go to the

Rudik [331]

Answer:

A. to eat a healthier meal

Explanation:

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4 years ago

One example of a very complex land ecosystem full of thousands of kinds of living things

german

A Tropical Rain Forest. It has both Biotic and Abiotic factors which will contribute to thousands of living things.

6 0

3 years ago

Read 2 more answers

A straight, cylindrical wire lying along the x axis has a length L and a diameter d . It is made of a material described by Ohm'

Zepler [3.9K]

The magnitude and direction of the electric field in the wire are mathematically given as

$L &=[(v / L) v / m] \hat{i}$

<h3>What is the magnitude and direction of the electric field in the wire?</h3>

Generally, the equation for is mathematically given as

A cylindrical wire that is straight and parallel to the x-axis has the following dimensions: length L, diameter d, resistivity p, diameter d, potential v, and z length. combining elements from both sides

E d $x=\int d v.$

$\begin{aligned}&-E \int_0^L d x=\int_v^0 d v \\\therefore E \cdot L &=v \\L &=[(v / L) v / m] \hat{i}\end{aligned}$

In conclusion, the magnitude and direction of the electric field in the wire are given as

$L &=[(v / L) v / m]$