<span>In summary, density and specific gravity are properties used to help identify minerals. Density is a measure of the mass of a certain volume of the sample. Specific gravity is a unitless measure, and it is the ratio of the mass of a substance to the mass of an equal volume of water.</span>
Answer:
10.53m/s²
Explanation:
Centripetal acceleration is the acceleration of an object about a circle. The formula for calculating centripetal acceleration is expressed by:
v is the velocity of the car = 24.5m/s
r is the radius of the track = 57.0m
Substitute the given values into the formula:
Hence the centripetal acceleration of the race car is 10.53m/s²
We have that the electric field at the center of the metal ball due only to the charges on the surface of the metal ball is
From the question we are told that
A solid metal ball of radius 1.5 cm
bearing a charge of -15 nC is located near a hollow plastic ball of radius 1.9 cm bearing
uniformly distributed charge of -7 nC
The distance between the centers of the balls is 9 cm
Generally the equation for the electric field is mathematically given as
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Answer: d
Explanation: Did it on Ed2020 got it right
Initial volume of water is 155 mL. Convert the mass of iron and lead into volume using density values as follows:
d=\frac{m}{V}
Here, d is density, m is mass and V is volume of objects
volume of piece of iron can be calculated as:
V=\frac{m}{d}=\frac{15 g}{7.86 g/mL}=1.90 mL
Similarly, volume of lead can be calculated as:
V=\frac{m}{d}=\frac{20 g}{11.3g/mL}=1.77 mL
To calculate the final volume of water, volume of both iron and lead should be added to the initial volume of water.
V_{final}=V_{initial}+V_{iron}+V_{lead}=155 mL+1.90 mL+1.77mL=158.67 mL
Thus, new water level in milliliters will be 158.67 mL.