Answer:
Volume of each grain of sand:
radius of the spherical grain is given,
The grains are made up of silicon dioxide.
The density is equal to 
Then, the mass of each grain is given by:
Answer:
F = 50[N], to the left.
v = 10.52 [m/s]
Explanation:
<u>First problem</u>
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In order to solve this problem we must apply Newton's laws, in such a way that we must perform a summation of forces on the horizontal axis. In this way we will analyze each force and the direction of action.
The offensive player is applying a force of 100N to the right, while the defensive player applies a force of 150N to the left. In this way performing the summation of forces we have.
100 - 150 = F
F = - 50 [N]
Note: The negative sign indicates that the resulting force is to the left.
<u>Second problem</u>
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We must remember that the definition of speed is equal to the relationship between distance over time.
x = distance = 100 [m]
t = time = 9.5 [s]
v = x/t
v = 100/9.5
v = 10.52 [m/s]
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Answer:
resistance depends on length , cross sectional area , type of material and temperature
fuse is a safety device
Explanation:
The resistance of a wire is directly proportional to its length and inversely proportional to its cross-sectional area. Resistance also depends on the material of the conductor. ... The resistance of a conductor, or circuit element, generally increases with increasing temperature.
fuse is a safety device which is damaged when large amount of electricity pass through it and it does not damage any other component when electricity reach the fuse wire the fuse wire is very thin so if amount of electricity reach it burnt and and save the other component of house
yes water can conduct electricity
