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3 years ago

How does a plane mirror work

Physics

1 answer:

Nastasia [14]3 years ago

5 0

Answer:

Plane mirrors work because the light rays create a virtual image behind the mirror. Light rays from the object strike the mirror and reflect according to the law of reflection. ... Therefore, our eye and brain track the light rays backward to a position from which they appear to have come.

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An equilateral triangle 8.0 cm on a side is in a 3.5 mT uniform magnetic field. The magnetic flux through the triangle is 6.0 μW

erma4kov [3.2K]

Answer:

43.80°

Explanation:

The side of the equilateral triangle is given as 8 cm

The area of the equilateral triangle $A=\frac{\sqrt{3}}{4}a^2=\frac{1.732\times 8^2}{4}=27.712cm^2=27.712\times 10^{-4}m^2$

Magnetic field $B=3.5mT=3.5\times 10^{-3}T$

Magnetic flux $\Phi =6\mu Wb=6\times 10^{-6}weber$

We know that $\Phi =BACOS\Theta$

So $6\times 10^{-6}=3\times 10^{-3}\times 27.712\times 10^{-4}cos\Theta$

$cos\Theta =0.7217$

$\Theta =43.80^{\circ}$

3 0

4 years ago

An object increases vert its velocity from 22M/S 236M/S and five seconds. What is the acceleration of the object

MariettaO [177]

Answer:

$\boxed {\boxed {\sf a=42.8 \ m/s^2}}$

Explanation:

Acceleration can be found by dividing the change in velocity by the time.

$a=\frac{v-u}{t}$ (v is the final velocity, u is the initial velocity, t is the time).

The velocity increased from 22 m/s to 236 m/s in 5 seconds. Therefore:

$v=236 \ m/s\\u=22 \ m/s\\t= 5 \ s$

Substitute the values into the formula.

$a=\frac{236 \ m/s - 22 \ m/s}{5 \ s}$

Subtract in the numerator.

236 m/s-22 m/s=214 m/s

$a=\frac{214 \ m/s}{5 \ s}$

Divide.

$a=42.8 \ m/s^2$

The acceleration of the object is 42.8 meters per square second.

6 0

3 years ago

Question 2

ra1l [238]

Answer:

0.729 meters

Explanation:

d=(V0)t+(1/2)at^2

d=height of shelf

a=9.8 m/s^2 (acceleration due to gravity)

V0=0 m/s (initial downward velocity)

t=0.38586 seconds (1.173 meters/3.04 m/s)

4 0

3 years ago

Colin knows that as water moves through the water cycle, condensation also takes place. Condensation occurs when water vapor coo

Alborosie

Answer:

Monday

Explanation:

3 0

3 years ago

A girl is bouncing on a trampoline where is her gravitational potential energy a maximum and where is her kinetic energy maximum

Stella [2.4K]

Answer:

When you jump down, your kinetic is converted to potential energy of the stretched trampoline. The trampoline's potential energy is converted into kinetic energy, which is transferred to you, making you bounce up. At the top of your jump, all your kinetic energy has been converted into potential energy. Right before you hit the trampoline, all of your potential energy has been converted back into kinetic energy. As you jump up and down your kinetic energy increases and decrease.

7 0

3 years ago