All categories

3 years ago

Can anyone help me with questions a and c

Physics

1 answer:

Ganezh [65]3 years ago

5 0

Answer:

n=sin i/sin r

n= -0.305/-0.428

n=0.713

sin c=1/n

sin c=1/0.713

sin c= 1.403

c=sin⁻¹(1.403)

c= 40.842°

Explanation:

i hope it will be helpful

plzzz mark as brainliest

You might be interested in

When the displacement of a mass on a spring is 12 A, what percentage of the energy is kinetic energy? At what displacement, as a

natima [27]

Answer:

75%

$\dfrac{A}{\sqrt{2}}$

Explanation:

x = Displacement of spring = $\dfrac{1}{2}A=\dfrac{A}{2}$

k = Spring constant

Total energy of the spring is

$E=\dfrac{1}{2}kA^2$

Elastic potential energy is given by

$U=\dfrac{1}{2}kx^2\\\Rightarrow U=\dfrac{1}{2}k(\dfrac{A}{2})^2\\\Rightarrow U=\dfrac{1}{2}k\dfrac{A^2}{4}\\\Rightarrow U=\dfrac{1}{4}\times \dfrac{1}{2}kA^2\\\Rightarrow U=\dfrac{1}{4}E$

Total energy is given by

$E=U+K\\\Rightarrow K=E-U\\\Rightarrow K=E-\dfrac{1}{4}E\\\Rightarrow K=\dfrac{3}{4}E\\\Rightarrow \dfrac{K}{E}=0.75$

The percentage will be

$\dfrac{K}{E}=0.75\times 100\%\\\Rightarrow \dfrac{K}{E}=75\%$

The required percentage is 75%

According to the given condition

$\dfrac{E}{2}=\dfrac{1}{2}kx^2\\\Rightarrow \dfrac{\dfrac{1}{2}kA^2}{2}=\dfrac{1}{2}kx^2\\\Rightarrow \dfrac{1}{2}kA^2=kx^2\\\Rightarrow x=\sqrt{\dfrac{1}{2}A^2}\\\Rightarrow x=\dfrac{A}{\sqrt{2}}$

So, the energy is half when displacement is $\dfrac{A}{\sqrt{2}}$

4 0

3 years ago

A 50-cm^3 block of wood is floating partially submerged in water, and a 50-cm^3 block of iron is totally submerged in water. Whi

sergeinik [125]

Answer:

B) The iron

Explanation:

Both blocks have the same volume. Since the wood is partially submerged, it displaces a smaller volume of fluid than the iron, that is completely submerged. The buoyant force is proportional to the volume of the displaced fluid. Therefore, the buoyant force on iron is greater.

6 0

4 years ago

0.0135 kg of steam at 100°C is

lora16 [44]

Answer:

33333.35 kg

Explanation:

I got it right on Acellus, rounded to 33300 sigfigs

8 0

3 years ago

Kind of physical barrier

adoni [48]

Doors, walls, distance.

5 0

3 years ago

What is the radius of a hemisphere with a volume of 61326 ft^3

Klio2033 [76]

Calculator soup says the answer is 30.82

7 0

3 years ago

Can anyone help me with questions a and c​

Can anyone help me with questions a and c