Electromagnetic waves do not require a medium, but can travel through one.
1 answer:
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Answer:
2.25 (or ) g/mL
<u>Skills needed: Density</u>
Step-by-step explanation:
1) Briefly, let's cover what density is:
- It is
- Measures the mass per unit of volume
- In this situation the formula for density is:
---> is the final mass
---> is the initial mass
---> is the final volume
---> is the initial volume
2) In this case, we start out with a mass of 180 grams as stated in the problem, and also 50 mL of water initially.
This means that:
- is 180 g
- is 50 mL
3) Also, we end up with 270 g in mass, and 90 mL of water finally.
- is 270g
- is 90 mL
4) We can find density by substitute given the values above:
5) Our answer is 2.25 g/mL (since mass is grams (g), and volume is milliliters (mL) in the problem above).