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DedPeter [7]
3 years ago
11

The density of gold is 19.3 g/cm3. What is this density in the units of lbs/in3? (1 in = 2.54 cm and 1 lb = 453.6 g).

Chemistry
1 answer:
DiKsa [7]3 years ago
7 0

Answer:

\rho =0.697\frac{lb}{in^3}

Explanation:

Hello,

In this case, given that 1 inch equals 2.54 cm and 1 lb equals 453.6 g we apply the following conversion factor in order to compute the required density in lb/in³:

\rho=19.3\frac{g}{cm^3}*\frac{1lb}{453.6g}  *(\frac{2.54cm}{1in} )^3\\\\\rho =0.697\frac{lb}{in^3}

Best regards.

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Explanation:

Temperature is the average thermal energy (or heat) in a substance. Sound isn't really related, thermometers measure temperature, and chemical reactions can produce heat, but none of those are measured by temperature.

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4 0
2 years ago
How old is a bone if it now .3125 of C-14 when it originally had 80.0g of C-14
Taya2010 [7]
<h3>Answer:</h3>

42960 years

<h3>Explanation:</h3>

<u>We are given;</u>

  • Remaining mass of C-14 in a bone is 0.3125 g
  • Original mass of C-14 on the bone is 80.0 g
  • Half life of C-14 is 5370 years

We are required to determine the age of the bone;

  • Using the formula;
  • Remaining mass = Original mass × 0.5^n , where n is the number of half lives.

Therefore;

0.3125 g = 80.0 g × 0.5^n

3.90625 × 10^-3 = 0.5^n

  • Introducing logarithm on both sides;

log 3.90625 × 10^-3 = n log 0.5

Solving for n

n = log 3.90625 × 10^-3 ÷ log 0.5

   = 8

  • Therefore, the number of half lives is 8
  • But, 1 half life is 5370 years
  • Therefore;

Age of the rock = 5370 years × 8

                          = 42960 years

Thus, the bone is 42960 years old

7 0
3 years ago
A 100-meter sprint is a race using only the straight side of a racetrack. A 400-meter sprint is a race that makes one complete l
Neporo4naja [7]
For 100m Race ,
displacement = distance covered .
divide the above equation by time t (assuming it takes t time to complete 100m race),
we get,
velocity = speed.
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displacement = 0,
distance ≠0=400m.
=> displacement ≠distance.
=> velocity ≠ speed.
7 0
3 years ago
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