Answer:
Wc = 7.84 weight of crown
Ww = 7.84 - 6.86 = .98 weight of water displaced
Density = 7.84 / .98 = 8 crown is 8 X that of water
Since gold has a density of 19.3 that of water the crown is certainly not 100 percent (if any) gold
Wind is caused by a difference in pressure from one area to another area on the surface of the earth. Air naturally moves from high to low pressure, and when it does, it is called wind. Generally, we can say that the cause of wind is the uneven heating of the earth's surface by the sun.
Answer:
Physical properties are those that can be determined or measured without changing the composition or identity of the substance. These properties include color, odor, taste, density, melting point, boiling point, conductivity, and hardness.
Explanation:
Answer:
The centripetal acceleration of the rock is decreases by a factor of 3.
Explanation:
Given that,
Radius of circle
Time period = T
Radius of new circle
We need to calculate the velocity
Using formula of velocity
The time period for new circle
The time period remains same.
Put the value in the equation
The acceleration of the rock is
We need to calculate the acceleration of the new rock
Using formula of acceleration
Put the value into the formula
Hence, The centripetal acceleration of the rock is decreases by a factor of 3.
Answer:
2966 m
Explanation:
Assuming g = 9.8 m/s and ignoring air resistance,
the coin reaches 60 m/s in t = v/a = 60/9.8 = 6.12 s
h = 3150 - ½(9.8)6.12² = 2,966.326