A veterinarian thinks that a dog has swallowed a key ring. Which types of electromagnetic waves is the doctor most likely

A rifle is fired in a valley with parallel vertical walls. The echo from one wall is heard 1.55 s after the rifle was fired. The

elena55 [62]

Answer:

$w=694.575\ m$

Explanation:

Given:

velocity of the sound, $v=343\ m.s^{-1}$

time lag in echo form one wall of the valley, $t= 1.55\ s$

time lag in echo form the other wall of the valley, $t'=2.5\ s$

distance travelled by the sound in the first case:

$d=v.t$

$d=343\times 1.55$

$d=531.65\ m$

Since this is the distance covered by the sound while going form the source to the walls and then coming back from the wall to the source so the distance of the wall form the source will be half of the distance obtained above.

$s=\frac{d}{2}$

$s=\frac{531.65}{2}$

$s=265.825\ m$

distance travelled by the sound in the second case:

$d'=v.t'$

$d'=343\times 2.5$

$d'=857.5\ m$

Since this is the distance covered by the sound while going form the source to the walls and then coming back from the wall to the source so the distance of the wall form the source will be half of the distance obtained above.

$s'=\frac{d'}{2}$

$s'=\frac{857.5}{2}$

$s'=428.75\ m$

Now the width of valley:

$w=s+s'$

$w=265.825+428.75$

$w=694.575\ m$

6 0

4 years ago

The Sun delivers an average power of 15.29 W/m2 to the top of Saturn's atmosphere. Find the magnitudes of vector E max and vecto

Elenna [48]

Answer:

$E=\sqrt{\frac{2u_E}{\epsilon_0}}=1.8*10^6N/C\\B=\sqrt{2\mu_0}=1.58*10^{-3}T$

Explanation:

The energy density of electromagnetic waves can be computed as

$u_{E}=\frac{1}{2}\epsilon_0E^2\\u_B=\frac{B^2}{2\mu_0}$

The power is the energy per unit of time. Hence we can take uE and Ub as 15.29J

By taking apart E and B we have

$E=\sqrt{\frac{2u_E}{\epsilon_0}}=1.8*10^6N/C\\B=\sqrt{2\mu_0}=1.58*10^{-3}T$

hope this helps!!

6 0

3 years ago

Read 2 more answers

Under most conditions, except ________ change, the resistance of an object is a constant and does not depend on the amount of th

Readme [11.4K]

Answer:

Temperature change

Explanation:

4 0

4 years ago

How is luminosity affected by other characteristics of a star

Nitella [24]

Answer:As the size of a star increases, luminosity increases. If you think about it, a larger star has more surface area. That increased surface area allows more light and energy to be given off. Temperature also affects a star's luminosity.

6 0

3 years ago

How many Joules in 41.87 kcal?

gladu [14]

The answer is 175184.08 joules

4 0

3 years ago

Read 2 more answers