All categories

4 years ago

E electric- and magnetic-field what is the direction of propagation of the wave?

Physics

1 answer:

castortr0y [4]4 years ago

8 0

As well as the electric and magnetic fields being perpendicular to eachother, a wave moves perpendicularly to both

You might be interested in

An auditorium measures 35.0 m x 30.0 m x 5.0 m. The density of air is 1.20 kg/m^3. (a) What is the volume of the room in cubic f

Ksenya-84 [330]

Answer:

(a) 1852259 $ft^3$ (b) 489085.47 pound

Explanation:

We have given auditorium measures 35 m×30 m×5 m

We know that 1 meter = 3.28 feet

So the measure of auditorium = 35×3.28 feet ×30×3.28 feet× 5×3.28 feet

(a) So the volume of the auditorium $=35\times 3.28\times 30\times 3.28\times 5\times 3.28=185259.648ft^3$

Density is given as $d=1.20kg/m^3$

(b) weight of air = volume × density $=185259.648\times 1.2=222311.577kg$

We know that 1 kg = 2.20 pound

So 222311.577 kg =222311.577×2.20=489085.47 pound

5 0

4 years ago

You are a detective investigating why someone was hit on the head by a falling flowerpot. One piece of evidence is a smartphone

umka21 [38]

Answer:

0.37 m

Explanation:

Given :

Window height, $h_1$ = 1.27 m

The flowerpot falls 0.84 m off the window height, i.e.

$h_2$ = (1.27 x 0.84 ) m in a time span of $t=\frac{8}{30}$ seconds.

Assuming that the speed of the pot just above the window is v then,

$h_2=ut+\frac{1}{2}gt^2$

$(1.27 \times 0.84) = v \times \left( \frac{8}{30} \right) + \frac{1}{2} \times 9.81 \times \left( \frac{8}{30} \right)^2$

$v=\left(\frac{30}{8}\right) \left[ (1.27 \times 0.84) - \left( \frac{1}{2} \times 9.81 \times \left( \frac{8}{30 \right)^2 \right) \right]}$

$v= 2.69$ m/s

Initially the pot was dropped from rest. So, u = 0.

If it has fallen from a height of h above the window then,

$h = \frac{v^2}{2g}$

$h = \frac{(2.69)^2}{2 \times 9.81}$

h = 0.37 m

3 0

3 years ago

Driving in California is __________?

k0ka [10]

It is a privilege, because not everyone might have resources for training, and therefore no driving skills.

8 0

4 years ago

A man pushes down on a table. what does the table do to the man?

solong [7]

Question: A man pushes down on a table. what does the table do to the man?

Answer: pushes back against the hand

Explanation: The weight of the ma pushes down on the table with a force mg while the table pushes up on the book with an equal and opposite force

question answered by

(jacemorris04)

3 0

3 years ago

Read 2 more answers

Ask Your Teacher A trough is 16 ft long and its ends have the shape of isosceles triangles that are 2 ft across at the top and h

zloy xaker [14]

Answer:0.210 ft/min

Explanation:

Given

Length of trough $L=16 ft$

width of base $b=2 ft$

height of triangle $h=1 ft$

From Similar triangles property

$\frac{4}{2x}=\frac{1}{y}$

$2y=x$

volume of water in time t

$V=\frac{1}{2}\times (2x\cdot y)\cdot$

$V=16xy$

$V=32y^2$

differentiating

$\frac{\mathrm{d} V}{\mathrm{d} t}=32\times 2\times y\times \frac{\mathrm{d} y}{\mathrm{d} t}$

at $y=8 in.\approx 0.667 ft$

$9=64\times 0.667\times \frac{\mathrm{d} y}{\mathrm{d} t}$

$\frac{\mathrm{d} y}{\mathrm{d} t}=\frac{9}{64\times 0.667}$

$\frac{\mathrm{d} y}{\mathrm{d} t}=0.210 ft/min$

6 0

4 years ago