All categories

3 years ago

PLEASE HELP FOR BRAINLIEST ANSWER I NEED AT LEAST 4 SENTENCES

Physics

1 answer:

sasho [114]3 years ago

3 0

Waves with a higher frequency have more energy than waves with a lower frequency. The greater the energy, the larger the frequency. This means that the energy and frequency of waves have a positive correlation.

You might be interested in

A block of metal is 3 cm on each side. It has a mass of 283.5 grams. What is the density of the metal.

Luden [163]

$Density = \frac{Mass}{Volume}
\\\rho=\frac{m}{V}
\\\\\rho=\frac{283.5}{3^3}
\\\\\rho=\frac{283.5}{27}
\\\\\rho = 10.5 g/cm^3
$

5 0

3 years ago

You are explaining to friends why astronauts feel weightless orbiting in the space shuttle, and they respond that they thought g

bezimeni [28]

Answer:

It's only 1.11 m/s2 weaker at 400 km above surface of Earth

Explanation:

Let Earth radius be 6371 km, or 6371000 m. At 400km above the Earth surface would be 6371 + 400 = 6771 km, or 6771000 m

We can use Newton's gravitational law to calculate difference in gravitational acceleration between point A (Earth surface) and point B (400km above Earth surface):

$g = G\frac{M}{r^2}$

where G is the gravitational constant, M is the mass of Earth and r is the distance form the center of Earth to the object

$\frac{g_B}{g_A} = \frac{GM/r^2_B}{GM/r^2_A}$

$\frac{g_B}{g_A} = \left(\frac{r_A}{r_B}\right)^2$

$\frac{g_B}{g_A} = \left(\frac{6371000}{6771000}\right)^2$

$\frac{g_B}{g_A} = 0.94^2 = 0.885$

$g_B = 0.885 g_A$

So the gravitational acceleration at 400km above surface is only 0.885 the gravitational energy at the surface, or 0.885*9.81 = 8.7 m/s2, a difference of (9.81 - 8.7) = 1.11 m/s2.

6 0

3 years ago

A solid cylinder of radius 10 cm and mass 12 kg starts from rest and rolls without slipping a distance L = 6.0 m down a roof tha

inna [77]

Answer:

Explanation:

Acceleration of cylinder

a = g sin 30 / 1+ k² / r² where k is radius of gyration and r is radius of cylinder.

For cylinder k² = (1 / 2) r²

acceleration

= gsin30 / 1.5

= g / 3

= 3.27

v² = u² + 2as

= 2 x 3.27 x 6

v = 6.26 m /s

v = angular velocity x radius

6.26 = angular velocity x .10

angular velocity = 62.6 rad / s

b ) vertical component of velocity

= 6.26 sin 30

= 3.13 m /s

h = ut + 1/2 g t²

5 = 3.13 t + .5 t²

.5 t²+ 3.13 t- 5 = 0

t = 1.32 s

horizontal distance covered

= 6.26 cos 30 x 1.32

= 7.15 m

7 0

3 years ago

What particles exist within plasma that do not exist in other states?

34kurt

C. free electrons. Plasma is made up of atoms. The atoms have had some or all of the electrons stripped away. The nuclei are positively charged and are called ions. The ions roam freely. Gases are made up of both molecules and atoms.

3 0

3 years ago

Please! Help me (with explanation)

torisob [31]

B. The angle will cause the suns rays to be reflected downward to the other scout

4 0

3 years ago