Answer:
The current that flows through the lamp is 0.5 A.
Explanation:
A lamp functions like a resistor and the real power absorbed by a resistor is given by the product of the voltage drop across it's terminals and the current that flows through it. If we wish to find the current that this lamp draws we should divide the wattage given (60 W) by the voltage drop provided (120 V). We then have:
i = P/V = 60/120 = 0.5 A.
Answer:
B = 1058.4 N
Explanation:
Given that,
The volume of a metal block, V = 0.09 m³
The density of fluid, d = 1200 kg/m³
We need to find the buoyant force when it's Completely immersed in brine. The formula for the buoyant force is given by :

g is acceleration due to gravity

So, the required buoyant force is 1058.4 N.
a) Density at 100 degrees: 
Explanation:
The density of mercury at 0 degrees is 
Let's take 1 kg of mercury. Its volume at 0 degrees is

The formula to calculate the volumetric expansion of the mercury is:

where
is the cubic expansivity of mercury
V is the initial volume
is the increase in temperature
In this part of the problem, 
So, the expansion is

So, the new density is

b) Density at 22 degrees: 
We can apply the same formula we used before, the only difference here is that the increase in temperature is

And the volumetric expansion is

So, the new density is

The answer is D) second/meter