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2 years ago

Which of newtons laws does F=MA represent

Physics

2 answers:

aalyn [17]2 years ago

5 0

Newtons Second Law of Motion

photoshop1234 [79]2 years ago

3 0

That equation is usually listed as Newton's second law of motion. But what difference does it make ? Knowing that fact doesn't help you apply the equation.

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Density is ———- Through the world’s ocean

Montano1993 [528]

Density is varying through the world’s oceans. The density of ocean water is not uniform.

7 0

3 years ago

What impact has the use of optical fibre cables had on the way we receive and communicate information? Discuss both positive AND

frozen [14]

Due to rising demand for higher bandwidth and faster speed connections, fiber optic transmission is becoming more and more common in the developing world. Optical fiber has had a great impact on the way we receive and transmit signals. They have largely replaced copper wire communications in core networks in the developed world, because of its advantages over electrical transmission. But they brought some difficulties as well.

Following are the advantages and disadvantages of optical fiber:

Advantages

They provide extremely High Bandwidth.
Optical fiber is capable of low power loss at long distances.
Optical fiber is highly resistant to electromagnetic disturbances. They are virtually error free.
The data is transferred through light that is why there is no security risk of data being detected.
Optical fiber has lesser weight and size as compared to other cables.

Disadvantages

They are made of glass that is why they are very fragile and they have to be handled carefully.
They are difficult to install. If you bend them too much, they will break. And fiber cable is highly susceptible to damage during installation or construction activities.
Extra optical components have to be added to handle dispersion of light at longer distances.
Optical fiber costs a lot more than copper cables. The installation itself is very costly.

Keywords: fiber optics, bandwidth, transmission, impact, advantages, disadvantages

Learn more about Fiber Optics from brainly.com/question/1373678

#learnwithBrainly

5 0

3 years ago

PLEASE HELP!! explain the advantages of operating a motor vehicle that is 20% efficient instead of one that is 10 % efficient

sladkih [1.3K]

Well, one is more effeciant than the other. I think it would run on less gass.

7 0

3 years ago

A resistor, an inductor, and ideal battery, and a switch are connected in series. Just after the switch is closed, which of the

Marianna [84]

Answer:

b) the current and the voltage across the resistor

Explanation:

As soon as we close the switch then the current in the circuit will be zero because the inductor connected in series will not allow to change the current through it due to its inertial property

Since initial current through the inductor is zero so after connecting the key the current will still remains zero and then it will start increasing

The equation for current is given as

$i = i_o(1 - e^{-Rt/L})$

so as soon as the key is closed the current in the circuit is zero and hence the voltage across the resistor is also zero as we know

$V_r = i R = 0$

so correct answer will be

b) the current and the voltage across the resistor

5 0

3 years ago

A ball is thrown upward with a speed of 28.2 m/s.A. What is its maximum height?B. How long is the ball in the air?C. When does t

Ede4ka [16]

Answer:

(A) The maximum height of the ball is 40.57 m

(B) Time spent by the ball on air is 5.76 s

Explanation:

Given;

initial velocity of the ball, u = 28.2 m/s

(A) The maximum height

At maximum height, the final velocity, v = 0

v² = u² -2gh

u² = 2gh

$h = \frac{u^2}{2g}\\\\h = \frac{(28.2)^2}{2*9.8}\\\\h = 40.57 \ m$

(B) Time spent by the ball on air

Time of flight = Time to reach maximum height + time to hit ground.

Time to reach maximum height = time to hit ground.

Time to reach maximum height is given by;

v = u - gt

u = gt

$t = \frac{u}{g}$

Time of flight, T = 2t

$T = \frac{2u}{g}\\\\ T = \frac{2*28.2}{9.8}\\\\ T = 5.76 \ s$

As the ball moves upwards, the speed drops, then the height of the ball when the speed drops to 12m/s will be calculated by applying the equation below.

v² = u² - 2gh

12² = 28.2² - 2(9.8)h

12² - 28.2² = - 2(9.8)h

-651.24 = -19.6h

h = 651.24 / 19.6

h = 33.23 m

Thus, at 33.23 m the speed will be 12 m/s

6 0

3 years ago