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jenyasd209 [6]
3 years ago
10

Which statement is true about acceleration?

Physics
2 answers:
stira [4]3 years ago
7 0

Answer:

Acceleration is the rate at which the velocity changes.

Explanation:

nikklg [1K]3 years ago
6 0
Is there answer choices if so i think it would be a)
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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
When a physical change in a sample occurs, which of the following would NOT change?
GREYUIT [131]
It's Composition. (C)
3 0
3 years ago
A 0.0663 kg ingot of metal is heated to 241◦C
Westkost [7]

Answer:280.216j/kg°C

Explanation:

Mass of metal=0.0663kg

mass of water=0.395kg

Final temperature=27.4°C

Temperature of metal=241°C

Temperature of water=25°C

specific heat capacity of water=4186j/kg°C

0.0663xax(241-27.4)=0.395x4186x(27.4-25)

0.0663xax213.6=0.395x4186x2.4

14.16168a=3968.328

a=3968.328 ➗ 14.16168

a=280.216j/kg°C

4 0
3 years ago
I need help with question 6
Irina-Kira [14]

Answer:

She will have to ride her scooter approximately 10 minutes.

8 0
3 years ago
Read 2 more answers
A star is known to be moving at 8.46km/s toward the earth. If you observe the spectral line to be at 5.02nm, at what wavelength
anastassius [24]

Answer:

\lambda_x=5.019858nm

Explanation:

From the question we are told that

Speed of star S=8.46km/s

Distance of spectral line \lambda_0= 5.02nm

Generally the equation for wavelength with respect to spectral lines is mathematically given by

\lambda=\lambda _0 *\frac{v}{c}

where

\lambda_0= length\ of\ spectral\ line

c=The\ speed\ of\ light

v= speed\ of\ moving\ object

therefore

\lambda=5.02*10^{-9} *\frac{8.46*10^{12}}{299 792 458*10^9}

\lambda=1.42*10^{-4} nm

Generally the equation for new wavelength is mathematically given as

\lambda_x=\lambda _0-\lambda

\lambda_x=5.02 nm-1.42*10^{-4} nm

\lambda_x=5.02-1.42*10^{-4}

Therefore

\lambda_x=5.019858nm

5 0
3 years ago
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