2 years ago

Which of the following can explains convection?

Physics

1 answer:

Vikentia [17]2 years ago

7 0

Answer:

A) would be the best explanation because hot air is less dense and would rise to the top of a column of air

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a stockbroker "talks up" a piece of stock that he wants you to buy because it was a high return rate. This is an example of: ?

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I believe the answer is manipulation of information. Hope I helped!

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3 years ago

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2. Without changing the mass or height, what else do you think you could do to design a system in which GPE and KE values are mo

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3 years ago

Suppose that a sound has initial intensity β1 measured in decibels. This sound now increases in intensity by a factor f. What is

topjm [15]

Answer:

β2= β1+10*f

Explanation:

comparing β2 and β1, it is said that β2 is increased by a factor of f.

for each factor of f, there is a 10*f dB increase.

therefore if the β1 is increases by an intensity of factor f

the new intensity would be β1+ 10*f

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3 years ago

Why is it dangerous to connect a battery to itself. what is the term used to describe that

Yuki888 [10]

In the circuit outside of the battery the electrons have to expend all of their energy on the internal resistance of the battery which causes heating

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3 years ago

Calculate the acceleration of a 1000 kg car if the motor provides a small thrust of 1000 N and the static and dynamic friction c

grin007 [14]

Explanation :

It is given that,

Mass of the car, m = 1000 kg

Force applied by the motor, $F_A=1000\ N$

The static and dynamic friction coefficient is, $\mu=0.5$

Let a is the acceleration of the car. Since, the car is in motion, the coefficient of sliding friction can be used. At equilibrium,

$F_A-\mu mg=ma$

$\dfrac{F_A-\mu mg}{m}=a$

$a=\dfrac{1000-0.5(1000)(9.81)}{1000}$

$a=-3.905\ m/s^2$

So, the acceleration of the car is $-3.905\ m/s^2$ . Hence, this is the required solution.

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3 years ago