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3 years ago

Buoyant force acts in the opposite direction as the force of

Physics

1 answer:

Natalka [10]3 years ago

3 0

Buoyant force acts in the opposite direction as the force of

Gravity

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An insulator can do which of the following? Conduct charge through it. Become positively or negatively charged. Transfer protons

ser-zykov [4K]

The correct answer is:
<span>Become positively or negatively charged

In fact, an insulator is a material where charges cannot move freely. Therefore, it can be positively or negatively charge (for example, if it is rubbed against another object, the insulator can remain with an excess of charge), but it cannot transfer charge to other objects.</span>

5 0

3 years ago

A beam of light of wavelength lambda = 541nm is normally incident on a diffraction grating which has 600 lines m * m ^ - 1 Deter

MrMuchimi

Answer:

Angle of diffraction for second order maxima is θ = 18.941°

Explanation:

From the question it is given that

wavelength of incident light = λ = 541 nm = 541 x $10^-^9 m$

order of maxima = n =2

diffraction grating has 600 lines per mm

⇒ distance between two slit is $\frac{1mm}{600}$ = 1.66 x $10^-^6$ m

using the relation of Braggs diffraction formula i.e.,

2dsinθ = nλ ..................................(1)

where, d = distance between two lines of grating

θ is the angle of diffraction

n= order of maxima

λ is the intensity of incident photon

on substituting the respected values in relation (1) we get,

2 x 1.66 x $10^-^6$ m sinθ = 2 x 541 x $10^-^9 m$

⇒ sinθ = 0.3246

⇒ θ = $sin^-^1(0.3246)$ = 18.941 °

8 0

3 years ago

The mass of a substance was found to be 8.2 g. By using the water displacement method the volume was found to be 3.6 cm3. Calcul

Vikki [24]

D= M/V

D=8.2/3.6

D= 2.3g/ml

5 0

4 years ago

Read 2 more answers

If the resultant of two velocity vectors of equal magnitude is also of the same magnitude, then which statement must be correct?

Tamiku [17]

The correct option is C) The angle between the vectors is 120°.

Why?

We can solve the problem and find the correct option using the Law of Cosine.

Let A and B, the given two sides and R the resultant (sum),

Then,

$R=A=B$

So, using the law of cosines, we have:

$R^{2}=A^{2}+B^{2}+2ABCos(\alpha)\\ \\A^{2}=A^{2}+A^{2}+2*A*A*Cos(\alpha)\\\\0=A^{2}+2*A^{2}*Cos(\alpha)\\\\Cos(\alpha)=-\frac{A^{2}}{2*A^{2}}=-\frac{1}{2}\\\\\alpha =Cos(-\frac{1}{2})^{-1}=120\°$