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3 years ago

Which instrument is not used to measure air pressure

Physics

1 answer:

Virty [35]3 years ago

5 0

It would be b. anemometer. it measures the speed of wind or any current of gas.

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Mutations provide a basis for...

Sladkaya [172]

Answer:

Explanation:

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3 years ago

What happen to the light ray when it enters to crown glass block ?

Tatiana [17]

as light enters the block it will bend and change direction.

Hope this helps

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3 years ago

A car went 60 km in 5/6 of an hour while a second car went 54 km in 2/3h. Which car was faster? How many times faster?

Nastasia [14]

Answer:

The car that went 54 km in 2/3h was faster, 5/4 times faster than the other car

Explanation:

Average speed of a car is the ratio between the displacement $\Delta x$ and the time (t) it takes to do that displacement:

$V_{avg}=\frac{\Delta x}{t}$

So, for the first car:

$V_{avg1}=\frac{60km}{\frac{5h}{6}} =72\frac{km}{h}$ (1)

for the second car we have:

$V_{avg2}=\frac{60km}{\frac{2h}{3}} =90\frac{km}{h}$ (2)

So, the second cart is faster than the first one. To find how many times divide speed 2 by speed 1:

$\frac{90}{72}=\frac{5}{4}$

4 0

3 years ago

A small segment of wire contains 10 nC of charge. The segment is shrunk to one-third of its original length. A proton is very fa

Alik [6]

To solve this problem we will apply the concepts related to the electric field, linear charge density and electrostatic force.

The electric field is

$E = \frac{\lambda}{2\pi \epsilon_0 r}$

Here,

$\lambda$ = Linear charge density

$\epsilon_0$ = Permittivity of free space

r = Distance

The linear charge density can be written as,

Linear charge density is given as

$\lambda = \frac{q}{L}$

Replacing,

$E = \frac{\frac{q}{L}}{2\pi \epsilon_0 r}$

$E = \frac{q}{2\pi \epsilon_0 rL}$

The initial and final electric Force can be written as function of the charge and the electric field as

$F_i = E_i q$

$F_f = E_f q$

If we replace the value for the electric field we have,

$F_i = (\frac{q}{2\pi \epsilon_0 rL})q = (\frac{q^2}{2\pi \epsilon_0 rL})$

Length is one third at the end, then

$F_f = (\frac{q}{2\pi \epsilon_0 r(L/3)})q = (\frac{3q^2}{2\pi \epsilon_0 rL})$

The ratio of the force is

$\frac{F_f}{F_i} = \frac{(\frac{3q^2}{2\pi \epsilon_0 rL})}{(\frac{q^2}{2\pi \epsilon_0 rL})}$

$\frac{F_f}{F_i} = 3$

Therefore the required ratio is 3

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3 years ago

The effect of gravity on a falling object can be modeled by a ball dropped from different heights. What is a limitation of this

Lelechka [254]

Answer:

Explanation:

Just did it on A P E X

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3 years ago

Read 2 more answers