Answer:
Explanation:
<u>Density
</u>
The density of a substance is the mass per unit volume. The density varies with temperature and pressure.
The formula to calculate the density of a substance of mass (m) and volume (V) is:
The cube has a mass of m=3.75 g and a volume of V=3 ml, thus the density is:
Since 1 kg=1000 mg and 1 lt = 1000 ml, the density has the same value but with different units:
Complete question:
Driving in your car with a constant speed of v= 22 m/s, you encounter a bump in the road that has a circular cross-section, as indicated in the figure.
If the radius of curvature of the bump is 52 m, find the apparent weight of a 68-kg person in your car as you pass over the top of the bump.
Answer:
the apparent weight is 34 N
Explanation:
Given:
radius of curvature of the bump = 52 m
mass of the person = 68 kg
Apparent weight of the person due to centripetal acceleration which acts inward, is calculated as follows;
From Newton's second law of motion, apparent weight =
Therefore, the apparent weight is 34 N
I think the answer is #2 I’m not sure though
I think it’s B hope it helps:)
Gate valves, ball valves, and OS&Y valves