False I think
Hope this helped ^^;
Answer:
(a) Option B
The magnitude of the buoyancy force is equal to that of the ball's weight.
(b) Option B
The magnitude of the buoyancy force is larger than that of the ball's weight.
(c) Option B
They both have the same buoyancy force.
Explanation:
(a)
Ball 1
The sum of vertical forces is zero hence therefore
B-mg=0 where B is buoyancy force, m is mass of ball, g is acceleration due to gravity
B=mg
mg is weight of ball
Therefore, option B, The magnitude of the buoyancy force is equal to that of the ball's weight
(b)
Ball 2
The sum of vertical forces is zero hence therefore
B-T-mg=0 where B is buoyancy force, m is mass of ball, g is acceleration due to gravity and T is tension in the string
B=mg+T
Therefore, option B, The magnitude of the buoyancy force is larger than that of the ball's weight.
(c
)
Ball 2 and 3
They have similar buoyancy force since the weight displaced by the body equals the buoyancy force. In this case, the weight of the displaced fluid is proportional to the volume of the ball since the two balls have same volume. It therefore means that their buoyancy forces are also the same.
Answer: Approximately 15,192 kilometers
Answer: Option (c) is the correct answer.
Explanation:
Physical properties are the properties in which there is no change in chemical composition of a substance. On the other hand, chemical properties are the properties which change the chemical composition of a substance.
For example, when water boils at then it changes into vapor state whereas when water freezes at then it changes state from liquid to solid.
This means only physical state of water is changing and there is no change in chemical composition of water.
Hence, we can conclude that best option describing given information is that these are the physical changes water undergoes.
Answer:
The current flowing through the 4Ω resistor is;
C. 2.0 A
Explanation:
In the given figure, we have;
The series resistors in the bridge = 8Ω, and 4Ω are in series and 20Ω and 10Ω are in series
The sum of each of the series resistors are;
R₁ = 8Ω + 4Ω = 12Ω
R₂ = 20Ω + 10Ω = 30Ω
The equivalent resistors of the series resistors, R₁ and R₂ are parallel to each other
The current flowing through the 4Ω resistor = The current in R₁ = I₁
By the current divider rule, we have;
Therefore, I₁ = 2.0 A
The current flowing through the 4Ω resistor = I₁ = 2 A