Here are the answers to your questions:
Question 27: To find the acceleration (a) of the book, we can use Newton's second law formula \( F = ma \), where \( F \) is the force and \( m \) is the mass of the object.
Given:
- Force \( F = 0.5 , \text{N} \)
- Mass \( m = 500 , \text{g} = 0.5 , \text{kg} \) (since 1000 g = 1 kg)
We can rearrange the formula to find acceleration: \[ a = \frac{F}{m} = \frac{0.5 , \text{N}}{0.5 , \text{kg}} = 1 , \text{m/s}^2 \]
None of the options listed seem to match this result, as the expected answer is not provided. But if we had to select based on typical physics problems, I'd suggest a revision is needed on the options given.
Question 28: The mass number of an element is equal to:
a: the number of protons and neutrons.
Question 29: Match the Gas Law to its relationship:
- Gay-Lussac's Law: a. If the temperature of a gas increases, then the pressure increases.
- Charles' Law: c. If the temperature of a gas increases, then the volume of the gas increases.
- Boyle's Law: b. If the volume of a gas increases, then the pressure of the gas decreases.
Question 30: Given the nuclear reaction:
\[ \frac{224}{88} \text{Ra} \rightarrow \frac{4}{2} \text{He} + \frac{A}{Z} \text{X} \]
- What is the atomic mass of the new atom?: e. 220
- What is the atomic number of the new atom?: i. 86
- What is the symbol of the new atom?: d. Rn (Radon)
- What type of decay is demonstrated here?: g. Alpha Decay
If you have any more questions or need further assistance, feel free to ask!
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