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Elodia [21]
4 years ago
13

What are the 4 spheres that make up the earth

Physics
1 answer:
belka [17]4 years ago
3 0
The Four Spheres of Earth: Geosphere, Hydrosphere, Biosphere, and Atmosphere
You might be interested in
A 900 N crate is being pulled across a level floor by a force F of 340 N at an angle of 23° above the horizontal. The coefficien
Olegator [25]

Answer:

0.958891203 m/s²

Explanation:

N = Weight of crate = 900 N

\mu = Coefficient of friction = 0.25

Force of friction acting on the force applied

f=\mu N\\\Rightarrow f=0.25\times 900\\\Rightarrow f=225\ N

Force used to pull the crate

F=340cos 23\\\Rightarrow F=312.97165\ N

The net force is

F_n=F-f\\\Rightarrow F_n=312.97167-225\\\Rightarrow F_n=87.97167\ N

Acceleration is given by

a=\frac{F_n}{m}\\\Rightarrow a=\dfrac{87.97167}{\dfrac{900}{9.81}}\\\Rightarrow a=0.958891203\ m/s^2

The magnitude of the acceleration of the crate is 0.958891203 m/s²

4 0
4 years ago
A beam of 1.0 MHz ultrasound begins with an intensity of 1000 W/m². After traveling 12 cm through tissue with no significant ref
Ksenya-84 [330]

Answer:

Option C

Explanation:

Given:

- Depth of tissue d = 12 cm

- frequency of ultrasound f = 1 MHz

- Input Intensity I_i = 1000 W/m^2

- attenuation coefficient soft tissue a = 0.54

Find:

- Out-put intensity at the required depth

Solution

- The amount of attenuation in (dB) with the progression of depth is given by:

                                     Attenuation = a*f*d

                                     Attenuation = 0.54*12*1

                                     Attenuation = 6.48 dB

- The relation with attenuation and ratio of input and output intensity is given by:

                                     Attenuation = 10*log_10 (I_i / I_o)

                                     6.48 dB = 10*log_10 (I_i / I_o)

                                      I_i / I_o = 10^(0.648)

                                      I_o = 1000 / 10^(0.648)

                                      I_o = 225 W/m^2

- Hence the answer is option C:  I_o = 250 W/m^2  

4 0
4 years ago
You should be particularly careful a restraining a struggling rabbit because it can
Shtirlitz [24]
You have no options here so I'll just answer. It can cause a rise in heart rate and greatly increases the risk of overheating and even death. If you grab the rabbit too hard, you risk breaking/fracturing a bone or causing other kinds of damage, whether externally or internally, to the rabbit.
6 0
4 years ago
An insect sit's on the edge of a spinning record that has
attashe74 [19]

Answer:

1.67rad/s^2

Explanation:

a= v^2/r

a = 0.5^2/0.15

a= 1.67 rad/s^2

5 0
3 years ago
List the electromagnetic waves in order of their increasing,
Tom [10]

Answer:

order in increasing frequency:

radiowaves, microwaves, infrared radiation, visible light, ultraviolent radiation, x-rays, gamma rays.

order in increasing wavelength:

gamma rays, x-rays, ultraviolent radiation, visible light, infrared radiation, microwaves, radiowaves.

6 0
3 years ago
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