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3 years ago

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Someone help me please...

1 answer:

Doss [256]3 years ago

5 0

I. The liquid is contained in a thin-walled glass bulb. The bulb is made relatively larger than its bore to contain more of the liquid, so as to improve sensitivity.
Basically improve/increase sensitivity.

ii. To increase visibility of the scale. It acts as a magnifying glass.

hope that helps.

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Find the distance between two slits that produces the first minimum for 410-nm violet light at an angle of 45.0°

Tpy6a [65]

Answer:

Distance between slits, $d=2.89\times 10^{-7}\ m$

Explanation:

It is given that,

Wavelength, $\lambda=410\ nm=410\times 10^{-9}\ m$

Angle, $\theta=45$

We need to find the distance between two slits that produces first minimum. The equation for the destructive interference is given by :

$d\ sin\theta=(n+\dfrac{1}{2})\lambda$

For first minimum, n = 0

So, $d\ sin\theta=(\dfrac{1}{2})\lambda$

d is the distance between slits

So, $d=\dfrac{1/2\lambda}{sin\theta}$

$d=\dfrac{1/2\times 410\times 10^{-9}}{sin(45)}$

$d=2.89\times 10^{-7}\ m$

So, the distance between two slits is $2.89\times 10^{-7}\ m$ . Hence, this is the required solution.

6 0

4 years ago

a bee flies 25m north of the hive, then 10m east, 5m west and 10m south. how far north and east of the hive is it now?

krok68 [10]

(25m north) + (10m south) = 15m north

(10m east) + (5m west) = 5m east

So the bee is now 15m north and 5m east of the hive.

7 0

4 years ago

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A horizontal force of 24 N is being applied to a box on a level surface. The box is accelerating at the rate of 2.0 against a fr

Leya [2.2K]

Answer:

For SI units the mass m = 5 kg.

Explanation:

The sum of all horizontal forces is must be equal to maₓ:

∑Fₓ = maₓ = 24N - 14N = 10N

maₓ = 10N

m = 10N / aₓ = 10N / 2 m/s² = 5 m/s

7 0

4 years ago

What quantity do units represent in a value?

mihalych1998 [28]

Answer : Magnitude

Explanation :

In a value, the magnitude is represented by its units. It can be adopted by convention or by law.

Magnitude of any unit is used to measure the same kind of quantity.

For example: The unit of length which is a physical quantity is meter (m).

So, magnitude is correct answer.

5 0

3 years ago

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A car accelerates at 3 m/s*2. Assuming the car starts from rest, how much time does it need to

uranmaximum [27]

<h3><u>Given</u><u>:</u><u>-</u></h3>

Acceleration,a = 3 m/s²

Initial velocity,u = 0 m/s

Final velocity,v = 12 m/s

<h3><u>To</u><u> </u><u>be</u><u> </u><u>calculated:-</u><u> </u></h3>

Calculate the time take by a car.

<h3><u>Solution:-</u><u> </u></h3>

According to the first equation of motion:

v = u + at

★ Substituting the values in the above formula,we get:

⇒ 12 = 0 + 3 × t

⇒ 12 = 3t

⇒ 3t = 12

⇒ t = 12/3

⇒ t = 4 sec

5 0

3 years ago

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