Food Chain. A food chain shows you how one organism eats another and transfers its energy. For example, a zebra eats grass, and the zebra is eaten by the lion.

5 0

3 years ago

A typical ultrasound transducer used for medical diagnosis produces a beam of ultrasound with a frequency of 1.0 MHz. The beam t

serg [7]

frequency of the ultrasound given as

$f = 1.0 MHz$

speed of the wave is

$v = 1540 m/s$

Now the wavelength is given as

$wavelength = \frac{speed}{frequency}$

$\lambda = \frac{1540}{1\times 10^6}$

$\lambda = 1.5 mm$

now we know that distance between two consecutive antinodes is always half of wavelength

so we have

d = 0.75 mm

3 0

4 years ago

Chemicals in the air can combine with rain to produce acid rain, which is harmful to the environment. Which of these is most lik

irinina [24]

Hi there!

Normal rain has a pH between 5.0 and 5.5, which is slightly acidic on the pH scale. Acid rain on the other hand has an average pH of 4.0, much more acidic than your average rain.

Therefore, the most likely pH of acid rain would be 4.0.

7 0

3 years ago

What mass of a material with density ρ is required to make a hollow spherical shell having inner radius r1 and outer radius r2?

krok68 [10]

Answer: $m=\frac {\rho}{\frac{4}{3} \pi( (r_2)^{3} - (r_1)^{3}) }$