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vovikov84 [41]
3 years ago
11

A train can speed up at a uniform rate of 0.15 m/s2. In what minimum distance can

Physics
1 answer:
goblinko [34]3 years ago
3 0

Answer:

d = 2083.33 m

Explanation:

Given that,

Acceleration of the train, a = 0.15 m/s²

The initial speed of the car, u = 0\

Final velocity, v = 25 m/s

We need to find the minimum distance covered by the train. Let it is d. Using third equation of kinematics as follows :

v^2-u^2=2ad\\\\d=\dfrac{v^2-u^2}{2a}\\\\d=\dfrac{(25)^2-0}{2\times 0.15}\\\\d=2083.33\ m

So, the minimum distance is 2083.33 m

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A balloon is filled with helium at a pressure of 2.4 x 105 Pa. The balloon is at a
garri49 [273]
1)
p = 2.4 * 10^5 Pa
T = 18° C + 273.15 = 291.15 k
r = 0.25 m => V = [4/3]π(r^3) = [4/3]π(0.25m)^3 = 0.06545 m^3 = 65.45 L

Use ideal gas equation: pV = nRT => n = pV / RT = [2.4*10^5 Pa * 0.06545 m^3] / [8.31 J/k*mol * 291.15k] = 6.492 mol

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2) Double atoms => double volume

V2 / V1 = r2 ^3 / r1/3

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5 0
3 years ago
When you are riding in a car then the driver suddenly steps on the gas pedal, why do you feel a jolt and push back?
inessss [21]

Answer:

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4 0
2 years ago
Read 2 more answers
the radius of earth is 6370km and of mars is 3400km. if an object weighs 200N or earth , what will be it's weight on mars. the m
4vir4ik [10]
The weight of the object on mars is about 80n
4 0
3 years ago
Please help guyss!!!
Savatey [412]

Explanation:

The distance traveled north ward  = 2 miles

       distance traveled south ward  = 3miles

 Displacement is the distance traveled in a specific direction. So, it depend on the start and finish point.

       The displacement  = 3 miles  - 2miles  = 1mile southward

Distance is the total length of path;

        Distance  = 3 miles + 2 miles = 5miles

5 0
3 years ago
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