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shusha [124]
2 years ago
13

Volume of an block is 5 cm3. If the density of the block is 250 g/cm3, what is the mass of the block ?​

Physics
1 answer:
9966 [12]2 years ago
4 0

Answer:

1.25kg

Explanation:

Simply multiply volume and density together

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On Earth, a kangaroo jumping will eventually return to ground due to the unbalanced force of gravity. What law does this illustr
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3 years ago
Find the wavelength of the balmer series spectral line corresponding to n = 15.
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Answer:

371.2 mm

Explanation:

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when n = 15

1/λ = 1.097 × 10⁷ m⁻¹(1/2² -1/15²)

    = 1.097 × 10⁷ m⁻¹(1/4 -1/225)

    = 1.097 × 10⁷ m⁻¹(0.25 - 0.0044)

    = 1.097 × 10⁷ m⁻¹ 0.245556

    = 2.693 10⁶ m⁻¹

So,

λ  = 1/2.693 10⁶ m⁻¹

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7 0
3 years ago
Select all of the answers that apply. which of the following cause volcanic eruptions?
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4 0
3 years ago
Read 2 more answers
A. Group of cross country runners decided to go on an hour and a half run. During the first hour, they ran a total of 13 kilomet
pshichka [43]

Answer:

The average speed for the entire run is 12 km/h.

Explanation:      

The average speed is given by the following equation:

\overline{v} = \frac{d_{T}}{t_{T}}

Where:

d_{T}: is the total distance

t_{T}: is the total time

If during the first hour, they ran a total of 13 kilometers and then, they ran 5.0 kilometers during the next half an hour we have:

d_{T} = 13 km + 5 km = 18 km

t_{T} = 1 h + \frac{1}{2} h = 1.5 h

Hence, the average speed is:

\overline{v} = \frac{d_{T}}{t_{T}} = \frac{18 km}{1.5 h} = 12 km/h

Therefore, the average speed for the entire run is 12 km/h.

I hope it helps you!                                                                                      

3 0
3 years ago
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