Four different living organisms are shown on the right. Which statement is true for all of the organisms shown?

Final naïve case: If the highest-pitch string on the piano is made of spring steel (density = 7800 kg/m3) with a diameter of 1/3

oksano4ka [1.4K]

Answer:

The linear density is $K = 3.863 *10^{-3 } \ kg/m$

Explanation:

From the question we are told that

The density of steel is $\rho = 7800 \ kg/m^3$

The diameter of the string is $d = 0.794 \ mm = 7.94 *10^{-4} \ m$

The radius of the string is evaluated as $r = \frac{D}{2} = \frac{7.94 *10^{-4}}{2} = 3.97*10^{-4} \ m$

The volume of the string is mathematically evaluated as

$V = \pi * r ^2 * L$

Now assuming that the length of the string is L = 2 m

So

$V = 3.142 * (3.97 *10^{-4})^2 * (2)$

$V = 9.9041 *10^{-7} \ m^3$

Then the mass of the string would be

$m = \rho * V$

substituting value

$m = 7800*9.904 14 *10^{-7}$

$m = 7.73*10^{-3} \ kg$

Looking at the question we see that the unit of the linear density is $\frac{kg}{m}$

Hence the linear density is evaluated as

$K = \frac{m}{L}$

substituting value

$K = \frac{7.73 *10^{-3}}{2}$

$K = 3.863 *10^{-3 } \ kg/m$

8 0

3 years ago

Claire is traveling home when her mother calls and asks her to go to her grandma's house. She is 300 meters north of her house w

m_a_m_a [10]

Answer:

you divide distance traveled by the time it takes to travel that distance. average speed. If your speed changes from 10 km/h to 6 km/h, you have a(n) ... 400 km. Suppose that the average speed your dog can run is 3 m/s. ... she drives her scooter 7 kilometres north. She stops for lunch and then drives 5 kilometres south.

i rlly dunno lma.o

Explanation:

5 0

3 years ago

How do you calculate the potential energy by it's height and weight? and is there any other way to solve it?

White raven [17]

Answer:

PE = mgh

Explanation:

m is mass, g is gravitational constant (9.81) and h is height

5 0

3 years ago

A student swings a container of water in a vertical circle of radius 1.0 m. Calculate the minimum speed of the container so that

12345 [234]

Answer:

Explanation:

The centripetal acceleration requirement must equal gravity at the top of the circle

mg = mv²/R

v = √Rg

v = √(1.0(9.8))

v = 3.1304951...

v = 3.1 m/s

6 0

3 years ago

5. A man in a car is listening to the radio. The radio station is broadcasting at a frequency of 85 MHz from two radio transmitt

nasty-shy [4]

Answer:

Speed = 0.00392 m/s

Explanation:

Solution:

Frequency of the radio = 85 MHz

If we have the frequency, we can calculate the wavelength of the radio wave.

As we know,

Frequency = speed of light/wavelength

wavelength = c/f

c = speed of light = 3 x $10^{8}$ m/s

So,

Wavelength = 3 x $10^{8}$ m/s / 85 x $10^{6}$ Hz

Wavelength = 3.5294 m

Man gets disturbed reception at t = 15 min

t = 15 x 60 = 900 s

t = 900 s

Speed = distance/time

Here, distance is wavelength. So,

Speed = 3.5294 m / 900 s

Speed = 0.00392 m/s

Hence, the man's car is going with speed of 0.00392 m/s

3 0

3 years ago