Answer:
(a) 8.96
(b) 19600 dyne
(c) 19600 dyne
(d) 20 g
Explanation:
dcu = 8.96 g/cm^3, dw = 1 g/cm^3, A = 10 cm^2
Water level rises by 2 cm.
(a) The specific gravity of copper = density of copper / density of water
8.96 / 1 = 8.96
(b) According to the Archimedes's principle, the buoyant force acting on the body is equal to the weight of liquid displaced by the body.
Weight of water displaced by the copper = Area of beaker x rise in water level
x density of water x gravity
= 10 x 2 x 1 x 980 = 19600 dyne
(c) Same as part b
(d) Let mass of copper be m.
For the equilibrium condition,
the true weight of copper = Buoyant force acting on copper
m x g = 19600
m = 19600 / 980 = 20 g
Answer:
See the answers below
Explanation:
We can solve both problems using vector sum.
a)
Let's assume the forces that help the diver dive as positive downward, and the forces that oppose upward, as negative
The drag force is horizontal d this way in the horizontal direction we will only have the drag force that produces the water stream.
b)
Let's assume the forces that propel the rocket upwards as positive and forces like the weight of the rocket and other elements as negative forces.
False.
Theories are hypotheses that have been shown to accurately and predictably explain results obtained through repeated experimentation, to the point where the hypothesis can be assumed to be true. Then, such a hypothesis would be considered a theory.
Answer: The main reason the pollen and the extension the process of pollination is so that important is because it means the plants don't have to rely on water to transport the biological components necessary for the fertilization. Inside it and they contain the male portion of DNA needed for the plant reproduction.
Explanation:
Answer :
0.5 Ω
Explanation:
The following data were obtained from the question:
Voltage (V) = 7.2 V
Current (I) = 14.4 A
Resistance (R) =..?
The resistance of the motor can be obtained by applying the ohm's law equation as shown below:
V = IR
7.2 = 14.4 × R
Divide both side by 14.4
R = 7.2/14.4
R = 0.5 Ω
Therefore, the resistance is 0.5 Ω