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sveta [45]
3 years ago
8

Is it a good thing for people to live on Mars?

Physics
2 answers:
Evgen [1.6K]3 years ago
8 0

We were put on earth for a reason

SSSSS [86.1K]3 years ago
7 0
No. it is not good for people to live on Mars.
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A brass rod is 185 cm long and 1.60 cm in diameter. What force must be applied to each end of the rod to prevent it from contrac
PilotLPTM [1.2K]

Answer:

42000N

Explanation:

First you calculate how much it would contract, and secondly you then calculate the force to stretch it by that amount.

1) linear thermal expansion coef brass 19e-6 /K

∆L = αL∆T = (19e-6)(1.85)(110) = 0.00387 meter or 3.87 mm

Second part involves linear elasticity.

for brass, young's modulus is 15e6 psi or 100 GPa

cross-sectional area of rod is π(0.008)² = 0.0002 m²

F = EA∆L/L

F = (100e9)(0.0002)(0.00387) / (1.85)

F = 42000 or 42 kN

4 0
3 years ago
Write the mathematical expression of surface tension....??<br>**ans. me fast plz**​
Simora [160]

Answer:

holis como tas me ayudas con mi tare plis

8 0
3 years ago
Read 2 more answers
Relation between wavelength wave velocity and time period
Snezhnost [94]

Answer: wavelength=velocity×period

Explanation:the relation between velocity, wavelength and period is

Wavelength=velocity×period

8 0
3 years ago
Which times and distances are represented by the function? select three options. the starting distance, at 0 hours, is 300 miles
Naya [18.7K]

The times and distances are represented by the function are

  • at 2 hours, the traveler is 725 miles from home.
  • at 3 hours, the distance is constant, at 875 miles
  • the total distance from home after 6 hours is 1,062.5 miles.

<h3>What is distance?</h3>

The distance is the length of path travelled by a body when moving with some speed and taking time t.

Given function is

D (t) = 300t +125 for 0≤t<2.5

D (t) = 875  for 2.5 ≤t≤3.5

D(t)= 75t +612.5 for 3.5<t≤6

According to the given function, for 2 hours, the traveler will travel from home,

D (2) = 300x2 +125 = 725 miles.

For time between 2.5 to 3.5 hr, the distance is constant i.e. 875 miles.

For total time 6hr, the distance travelled will be

D(6) = 75 x 6 +612.5 = 1062.5 miles.

Thus, the correct options are picked up.

Learn more about distance.

brainly.com/question/15172156

#SPJ1

4 0
3 years ago
Which phenomenon support only the wave theory of light? Check all that apply
lys-0071 [83]

Answer:

Diffraction and Interference of light support the wave theory of light.

Explanation:

Complete Question

Which phenomena support only the wave theory of light? Check all that apply.

1.reflection

2.refraction

3.diffraction

4.interference

5.photoelectric effect

Solution

There are two theories/schools of thoughts that light possesses wave and particle properties.

The wave properties of light explain that light is made as a result of interactions of electric and magnetic fields, hence, light is regarded as an electromagnetic wave that propagates without the need for a material medium and moves in a direction perpendicular to the direction of the oscillations or direction of the cause/source of the light waves.

Properties that support the wave properties of light are diffraction (ability to navigate or bend around obstacles) and Interference (two light waves can combine or superimpose to form a single resultant light wave with amplitude greater, lower or equal to the amplitudes of the two constituting light waves).

Hope this Helps!!!

8 0
4 years ago
Read 2 more answers
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