3 years ago

Time measurements from a stopwatch are not precise. Why not ?

1 answer:

fgiga [73]3 years ago

5 0

Human error (average human reaction time is .2 seconds)

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matrenka [14]

Hints?????????????????????????

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3 years ago

vlada-n [284]

$\frac{1}{2}$ (500kg) × $v^{2}$ = 4000J

V = √(4000 ÷ 250) = 4 m/s

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4 years ago

Anvisha [2.4K]

Answer:

Explanation: The elements cannot be separated by physical means. Water is a compound having two hydrogen atoms and one oxygen atom per molecule.

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3 years ago

finlep [7]

Answer:

Explanation:

First, arrange the information in a table:

Object Mass (kg) Velocity (m/s)

A 200 15

B 150 - 10

After the collision, the two objects are stick together, thus you talk aobut one object and one momentum.

According to the law of convervation of momentum, the momentum after the collision is equal to the momentum before the collision.

Momentum before the collision, P₁:

$P_1=m_{A,1}\times v_{A,1}+m_{B,1}\times v_{B,1}$

$P_1=200kg\times 15m/s+150kg\times (-10m/s)\\\\ P_1=3000kg.m/s-1500kg.m/s=1500kg.m/s$

Momentum after the collision:

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4 years ago

algol [13]

No but the sun could be a white dwarf stellar remnant.

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4 years ago