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2 years ago

Which is the smallest unit of life?

Physics

1 answer:

emmasim [6.3K]2 years ago

7 0

Answer:

the cell is the smallest unit

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1. What quantity of heat is required to raise?

netineya [11]

Answer: Calculate the energy required in joules to raise the temperature of 450 grams of water from 15°C to 85°C? (The specific heat capacity of water is 4.18 J/g/°C)

Explanation:

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3 years ago

Which is the following is made up mostly of water

tatyana61 [14]

soil i think is this from apex?

8 0

3 years ago

An astronaut named Speedo takes a trip to Sirius, which is located a distance of 8 lightyears from the Earth. If the spaceship m

Softa [21]

Answer:

a. 10 years

b. 6 years

c. 12 years behind

Explanation:

speed of light c = 3x $10^{8}$ m/s

distance of sirius from earth = 8 lightyears = 8 x c x 60 x 60 x 24 x 365 = 252288000c meters

speed of spaceship = 0.8c

time taken to reach sirius = distance covered divided by speed

t = d/s = 252288000c/0.8c = 315360000 sec

1 year = 60 x 60 x 24 x 365 sec = 31536000 sec

315360000 sec = 315360000/31536000 = 10 yrs

the time as observed by Goslo will be shorter than the real time as measured within the ship due to relativistic effects. using the relativistic relation for time dilation we have

t' = t $\sqrt{1 - \frac{v^{2} }{c^{2} } }$

since v = 0.8c

v/c = 0.8

where t' is the relativistic time as observed by Goslo,

t is the time within the ship

t' = 10 x $\sqrt{1 - 0.8^{2} }$ = 6 yrs

If speedo turns around immediately after reaching sirius, his total distance will be 252288000c x 2 = 50457600c meter

time taken = 50457600c/0.8 = 630720000 sec = 20 yrs

time within the ship will be calculated from time dilation

t' = t $\sqrt{1 - \frac{v^{2} }{c^{2} } }$

t' = 20 x $\sqrt{1 - 0.8^{2} }$ = 378432000 sec = 12 years behind

4 0

3 years ago

How can acceleration be involved if velocity is constant?

Olin [163]

If a body is in Linear Motion, and if velocity is constant, acceleration is zero,because acceleration is rate of change of velocity. We would need a change in velocity to calculate acceleration. Since it is CONSTANT, no change in velocity, no acceleration. Therefore ACCELERATION is said to be ZERO.

Mark Me Brainliest If It Helps!

5 0

3 years ago

I need Help ASAP I will give you brainlest and plus 5 stars ✨✨and plus thanks and 50 points EVeryONe need help this is due today

Svetach [21]

Answer:

The only one i did not do was the second one, the one where you rate how you are in the work environment, i did not do that one because i dont know how YOU are ....

Explanation:

Here are the rest....Hope this helps! Brainliest would be much appreciated! Have a great day! :)

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3 years ago