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Mandarinka [93]

3 years ago

7

Four measurements of the file card's width are made. Of the measurements given below, the LEAST precise.

1 answer:

matrenka [14]3 years ago

3 0

7.6 is the least precise

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A flat loop of wire consisting of a single turn of cross-sectional area 8.00 cm2 is perpendicular to a magnetic field that incre

abruzzese [7]

The area enclosed by the wire is
$A=8.00 cm^2 = 8.00 \cdot 10^{-4} m^2$

By using Faraday-Neumann-Lenz law, we can find the emf induced in the circuit, whose magnitude is equal to the variation of magnetic flux on the wire:
$\epsilon = \frac{\Delta \Phi}{\Delta t}= \frac{\Delta B A}{\Delta t}= \frac{(2.2 T-0.5 T)(8 \cdot 10^{-4} m^2)}{1.08 s}=1.26 \cdot 10^{-3} V$

And then, by using Ohm's law, we can find the induced current:
$I= \frac{\epsilon}{R}= \frac{1.26 \cdot 10^{-3} V}{2.60 \Omega}=4.86 \cdot 10^{-4}A$

3 0

3 years ago

A house at the bottom of a hill is fed by a full tank of water 5m deep and connected to the house by a pipe that is 110m long at

yawa3891 [41]

Answer:

a) $p=964178.7\ Pa$

b) $h=98.2853\ m$

Explanation:

Given;

depth of the water-tank, $d=5\ m$

length of the pipe, $l=110\ m$

inclination of the pipe from the horizontal, $\theta =58^{\circ}$

a)

Now the effective vertical height of the water column from the free surface of the water to the bottom of the pipe at house:

$h=d+l.\sin\theta$

$h=5+110\sin58$

$h=98.2853\ m$

Now the pressure due to effective water head:

$p=\rho.g.h$

where:

$\rho=$ density of the liquid, here water

$g=$ acceleration due to gravity

$h=$ height of the liquid column

$p=1000\times9.81\times 98.2853$

$p=964178.7\ Pa$

b)

Now the height of water corresponding to this pressure will be the same as the effective water head by the law of conservation of energy.

$h=98.2853\ m$

6 0

3 years ago

Gamma radiation is composed of neutrons and protons.<br> A. True<br> B. False

konstantin123 [22]

Answer:

false

Explanation:

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3 years ago

A simple machine used to raise a flag is a

NNADVOKAT [17]

A pulley ,it the same concept is used to raise an elevator

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Why can people go to the moon but they cant go to the bottom of the ocean??

maw [93]

Answer:u can go to the moon and bottom of the ocean

Explanation:

Because the suits help them do both of that

3 0

3 years ago