Ask question

Ask question

All categories

3 years ago

6

In a stadium, fans stand up and sit down to produce a wave across the stadium. This type of wave where the material travels perp

endicular to the direction of travel of the the wave. Which type of wave does this describe? A) mechanical wave. B) transverse wave. C) longitudinal wave. Eliminate D) electromagnetic wave.

2 answers:

Arada [10]3 years ago

8 0

Your answer would be A

Hope this helps

ra1l [238]3 years ago

3 0

This is a transverse wave.

You might be interested in

Type the correct answer in the box. Use numerals instead of words. Frank has a sample of steel that weighs 80 grams. If the dens

ad-work [718]

Answer:

10cm^3

Explanation:

Given data

Mass of steel = 80grams

density of steel= 8 g/cm^3

We know that the formula for density is given as

density= mass/volume

make volume subject of formula

volume= mass/density

volume=80/8

volume= 10cm^3

Hence, the volume 10cm^3

8 0

2 years ago

How do u work out weight c and d and what r the answers

Ket [755]

The whole secret of things that are balanced on a pivot like this is:

The sum of all of the 'moments' is equal on both sides.

The moment of each weight is (the weight) times (its distance from the pivot).
If you add up those for each eight on one side, it has to be equal to the sum
of all the ones on the other side.

<u>2. a).</u>
The moments on the right side are: (4 x 0.15) and (1 x 0.40).
They add up to (0.60 + 0.40) = 1.00

The only moment on the left side is (C x 0.25). Both sides have to be equal.

C x 0.25 = 1.00

Divide each side by 0.25, and you have C = 4 N .

===========================================

<u>2. b).</u>
The only moment on the left side is (5 x 0.40) = 2.00

The moments on the right side are (1 x 0.20) and (D x 0.30)
They add up to (0.3D + 0.2).

Both sides have to be equal. 0.3D + 0.2 = 2.0

Subtract 0.2 from each side: 0.3D = 1.8

Divide each side by 0.3: D = 6 N

6 0

3 years ago

PHYSICS HELP<br> PLEASE HELP ITS ABOUT ATWOOD MACHINES

m_a_m_a [10]

Answer:

7.23407 $\frac{m}{s^2}$

Explanation:

(I will not include units in calculations)

I'm assuming FBD's are already drawn, so I will work from there.

Let the 2.2kg block equal $m_2$ , and the 20kg block equal $m_1$ .

Summation equation for $m_2$ : $\sum F_x=F_t_2-(F_f+F_g_x)=m_2a$ , $\sum F_y=F_n-F_g_y=0$

Summation equation for $m_1$ : $\sum F_y=F_g-F_t_1=m_1a$

Torque Summation Equation: $\sum\tau=F_t_1*r-F_t_2*r=I\alpha$

Do some plugging in with the values given: $\sum\tau=F_t_1*r-F_t_2*r=.5Mr^2\alpha$

Replace $\alpha$ with $\frac{a}{r}$ , and cancel out the r's.

$\sum\tau=F_t_1-F_t_2=.5Ma$

This step is important: Rearrange the force summation equation to solve for each tension force.

$F_t_2=m_2a+F_f+F_g_x\\F_t_1=m_1g=m_1a$

Perform Substitution: $\sum\tau=m_1g-m_1a-(m_2a+F_f+F_g_x)=.5Ma$

Now, we need to find the friction force and the horizontal component of the force of gravity.

Note that $F_f=$ μ $F_n$

And based on our earlier summation equation: $F_n=F_g_y$

First, break $F_g$ into x and y components. $F_g_y=F_g\cos(\theta)$ , $F_g_x=F_g\sin(\theta)$

Perform substitution with this and the fact that $F_g=mg$ .

$\sum\tau=m_1g-m_1a-(m_2a+\mu*m_2g\cos(\theta)+m_2g\sin(\theta))=.5Ma$

Solving for a, plugging in numbers yields an answer of 7.23407 $\frac{m}{s^2}$

6 0

3 years ago

You have designed and constructed a solenoid to produce a magnetic field equal in magnitude to that of the Earth (5.0 10-5 T). I

saul85 [17]

Answer:

$I = 0.03637 A$

Explanation:

The given data in the question is

Magnetic field : $B = 5.0 \times 10^{-5} T$

Turns : $N = 350$

Length : $L = 32 cm = 0.32 m$

So, number of turns per unit length :

$n=\frac{N}{L}$

$n=\frac{350\: turns}{0.32 m}$

$n=1093.75 \: turns \: per \: meter$

If current is I , then magnetic field is given by

$B = \mu_{0} \times n \times I$

Also,

$I = \frac{B}{\mu_{0} \times n}$

Insert the values

$I = \frac{5.0 \times 10^{-5}}{4 \pi \times 10^{-7} \times 1093.75} A$

$I = 0.03637 A$

The current will be $I = 0.03637 A$

5 0

3 years ago

I don’t know why I am feeling worse day by day!

just olya [345]

Answer:

Why ?? What happened ??

6 0

3 years ago