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3 years ago

5

If a velocity is positive which would most likely yield a negative acceleration

1 answer:

Aleksandr [31]3 years ago

5 0

Answer:

A time that is less than half an hour

Explanation:

it says velocity is positive so it would yield to a negative acceleration

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Which of the following is NOT a force that influences the wind? A. coriolis effect B. magnetic field C. pressure gradient D. fri

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A magnetic field does not have any influence on wind. The Coriolis effect, pressure gradient, and friction do affect wind.

The solution is B.

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What is the wave characteristic of stage 1 sleep

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We all think that sleep has a uniform state of being. This is a wrong connotation but instead, the truth is sleep is composed of several different stages. This can be differentiated from one another by the patterns of brain wave activity that occur during each stage. In the 1st stage of the non-rapid eye movement or NREM, this is when the transitional phase occurs between wakefulness and sleep. This is the period when we drift off to sleep. The heartbeat as well as the respiration rates in the body slow down during this period. Furthermore, in stage 1 there is marked decrease in both overall muscle tension and core body temperature. Stage 1 wave activity s directly associated with the alpha and theta waves. It isa said that it is really easy to wake a person who is still at stage 1 and are not even convinced that he or she has been asleep during this stage.

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4 years ago

Two particles are placed at some distance. If the mass of each of the two particles is doubled, keeping the distance between the

mars1129 [50]

The final gravitational force will 4 times greater than the initial gravitational force.

We need to know about gravitational force to solve this problem. The gravitational force is caused by 2 masses of objects separated by a distance. It can be determined as

F = G . m1 . m2 / r²

where F is the gravitational force, G is the gravitational constant, m1 is the mass of the first object, m2 is the mass of the second object and r is the distance between two objects.

From the question above, we know that:

m1 initial = m

m2 initial = m

r initial = r final = r

m1 final = 2m

m2 final = 2m

The initial gravitational force is

Finitial = G . m1 . m2 / r²

Finitial = G . m . m / r²

Finitial = G . m² / r²

The final gravitational force is

Ffinal = G . m1 . m2 / r²

Ffinal = G . 2m . 2m / r²

Ffinal = G . 4m² / r²

The ratio is

Ffinal / Finitial = (G . 4m² / r²) / (G . m² / r²)

Ffinal / Finitial = 4

Hence, the final gravitational force will 4 times greater than the initial gravitational force.

For more on gravitational force at: brainly.com/question/19050897

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2 years ago

A 0.877 mol sample of N2(g) initially at 298 K and 1.00 atm is held at constant volume while enough heat is applied to raise the

MissTica

Answer : The value of $q\text{ and }\Delta U$ is 286.2 J and 286.2 J respectively.

Explanation : Given,

Moles of sample = 0.877 mol

Change in temperature = 15.7 K

First we have to calculate the heat absorbed by the system.

Formula used :

$q=n\times c_v\times \Delta T$

where,

q = heat absorbed by the system = ?

n = moles of sample = 0.877 mol

$\Delta T$ = Change in temperature = 15.7 K

$c_v$ = heat capacity at constant volume of $N_2$ (diatomic molecule) = $\frac{5}{2}R$

R = gas constant = 8.314 J/mol.K

Now put all the given value in the above formula, we get:

$q=0.877mol\times \frac{5}{2}\times 8.314J/mol.K\times 15.7K$

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$\Delta U=q+w$

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$\Delta U=q=286.2J$

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