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nignag [31]
3 years ago
14

Please help me ASAP!!

Physics
2 answers:
aniked [119]3 years ago
7 0

Answer:

the ball lose kentic energy and gains potential energy rolling upward

Nataly [62]3 years ago
7 0

Answer:

c

Explanation:

when a ball is rolling down it loses potential and gains kinetic, but in this case since the ball is going upwards it is losing kinetic energy and gaining potentail like a roller coaser

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It is estimated that uranium is relatively common in the earth's crust, occurring in amounts of 4 g / metric ton. A metric ton i
timama [110]

Answer:

The mass of Uranium present in a 1.2mg sample is 4.8 \cdot 10^{-6}\,mg

Explanation:

The ration between Uranium mass and total sample mass is: \frac{4g}{1000kg} =\frac{4g}{1000000g}=\frac{1}{250000}

For a sample of mass 1.2 mg, the amount of uranium is:

1.2\, mg \cdot \frac{1}{250000}=4.8 \cdot 10^{-6}\,mg

7 0
3 years ago
The Jewish state ended at the hands of the Romans in A.D. _____.
Leya [2.2K]
The answer would be 70
5 0
3 years ago
4. How long does it take a car traveling at 45 km/h to travel 100.0 m?<br> 4500m
Trava [24]

Answer:

8.0s

Explanation:

45 km/h ÷ 3.6  = 12.5 m/s

t.v = d/t

vt/v = d/v

t = d/v = 100.0m /12.5 m/s = 8.0s

Hope this helps!!

8 0
3 years ago
4. A tuning fork is held over a resonance tube, and resonance occurs when the surface of the water is 12 cm below the top of the
Mrac [35]

As we know that speed of sounds is given as

v = 332 + 0.6t

here we know that

t = 23 degree C

now from above equation we will have

v = 332 + (0.6)(23)

v = 345.8 m/s

now we also know that distance between two consecutive resonance length is half of the wavelength

L_2 - L_1 = \frac{\lambda}{2}

34 - 12 = \frac{\lambda}{2}

\lambda = 44 cm

now we know that

frequency = \frac{speed}{wavelength}

f = \frac{345.8}{0.44} = 786 Hz

so frequency will be 786 Hz

7 0
3 years ago
What evidence of a chemical change is observed when rust forms on iron
bagirrra123 [75]
A non-reversible Acton. A chemical reaction in non-reversible
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