A student did a research on weight and mass and reported the findings shown below. Using your knowledge of PAC 110, which statements below are incorrect?
The weight of the 5 g igneous rock at Cliffe Castle Museum was 49.0 N
The scalar quantity is the mass of 5g
A 5g of igneous rock is easily weighed using a spring balance
5g of the igneous rock was recorded to be zero in the basement of a museum
The statement "The scalar quantity is the mass of 5g" is incorrect. The scalar quantity is the mass, but the specific quantity mentioned in the statement is not the mass but rather the amount of substance (5g).
The lungs expand when we breathe in, resulting in an increase in the volume and a decrease in pressure. When we breathe out, the lungs shrink, resulting from a decrease in the volume and an increased pressure. Which of the gas laws us applicable to the above process? Blank 1 Law
Using my knowledge of PAC 110, I will analyze each statement to determine if it is incorrect or not:
1. The weight of the 5 g igneous rock at Cliffe Castle Museum was 49.0 N.
COMMENT: The weight of an object is the force of gravity acting on it. Therefore, the weight of an object depends on the acceleration due to gravity. Since the weight is given as 49.0 N for a 5 g igneous rock, this statement is incorrect. The weight should be calculated using the formula weight = mass x acceleration due to gravity.
2. The scalar quantity is the mass of 5g.
COMMENT: Scalars are quantities that have only magnitude and no direction. Mass is a scalar quantity as it is measure of the amount of matter in an object. Since the statement correctly identifies mass as a scalar, this statement is correct.
3. A 5g of igneous rock is easily weighed using a spring balance.
COMMENT: Spring balances are commonly used to measure weight. Since the statement suggests that a 5g igneous rock can be easily weighed using a spring balance, this statement is correct.
4. 5g of the igneous rock was recorded to be zero in the basement of a museum.
COMMENT: It is not possible for the weight of any object to be zero unless it is in a location with zero gravity. Therefore, if the statement claims that 5g of the igneous rock was recorded to be zero, it is incorrect.
In summary, the incorrect statement is: "The weight of the 5 g igneous rock at Cliffe Castle Museum was 49.0 N."
To determine which statements below are incorrect, we need to review the concepts of weight and mass.
1. The weight of the 5g igneous rock at Cliffe Castle Museum was 49.0 N.
To determine if this statement is incorrect or not, we need to know if the weight provided is accurate for the given mass. The weight of an object is the force exerted on it due to gravity. The formula to calculate weight is W = m * g, where W is the weight, m is the mass, and g is the acceleration due to gravity. The standard value for g is approximately 9.8 m/s^2. So, if we calculate the weight of a 5g object, it should be around 49.0 N (W = 5g * 9.8 m/s^2 = 49.0 N). Therefore, this statement is correct.
2. The scalar quantity is the mass of 5g.
A scalar quantity is a physical quantity that has only magnitude and no direction. Mass is a scalar quantity because it represents the amount of matter in an object without considering its direction. So, this statement is correct.
3. A 5g igneous rock is easily weighed using a spring balance.
A spring balance is a device used to measure the weight or force exerted by an object. If the spring balance has a suitable range or sensitivity for measuring 5g objects accurately, then it is possible to easily weigh a 5g igneous rock using a spring balance. Therefore, this statement is correct.
4. 5g of the igneous rock was recorded to be zero in the basement of a museum.
This statement contradicts the definition of weight and cannot be correct. If an object has mass, it will always have weight unless it is in a location where gravity is negligible or zero. So, this statement is incorrect.
In summary, the incorrect statement is:
- 5g of the igneous rock was recorded to be zero in the basement of a museum.