A student has a 2% salt water solution and a 7% salt water solution. To best imitate salt water at a local beach, he needs 1 lit
1 answer:
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Answer:
a) Q = C*emf
b) Decrease in electric field strength and electric potential
c) Initial current through the resistor = emf/R
d) The final charge = K*C*emf
Explanation:
a) The resistors and capacitors are linked in series with the battery
According to Kirchoff's voltage law, the total voltage in the circuit must equal zero
Let represent the Voltage across the Resistor
and
Integrating and
into equation (1)
Initially, as the capacitor reaches full charge, the current will drop to zero because of equilibrium
b) When the plastic sheet is inserted between the plates, current begins to flow because both the electric field intensity and electric potential decrease. As a result, charge diminishes, leading to current flow
c) The current through the resistor equates to the total current within the circuit (given the series connection)
Substituting the values of t and I₀ into the aforementioned formula for I
d) Note: The initial charge on the capacitor equals C * emf
Following the insertion of the plastic, the new charge will be:
Answer:
1/7 kg
Explanation:
Refer to the attached diagram for enhanced clarity regarding the question.
One of the blocks weighs 1.0 kg and accelerates downward at 3/4g.
g denotes the acceleration due to gravity.
Let M represent the block with known mass, while 'm' signifies the mass of the other block and 'a' refers to the acceleration of body M.
Given M = 1.0 kg and a = 3/4g.
By applying Newton's second law;
For the body with mass m;
T - mg = ma... (1)
For the body with mass M;
Mg - T = Ma... (2)
Combining equations 1 and 2 gives;
+Mg -mg = ma + Ma
Ma-Mg = -mg-ma
M(a-g) = -m(a+g)
Substituting M = 1.0 kg and a = 3/4g into this equation leads to;
3/4 g-g = -m(3/4 g+g)
3/4 g-g = -m(7/4 g)
-g/4 = -m(7/4 g)
1/4 = 7m/4
Multiplying gives: 28m = 4
m = 1/7 kg
Hence, the mass of the other box is 1/7 kg
