Suppose you have three identical lightbulbs, some wire, and a battery. You connect one lightbulb to the battery and take note of
1 answer:
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Answer:
density = 5000 [kg/m^3]
Explanation:
Density is defined as the relationship between mass and volume.
Now we have:
m = 100 [gr] = 0.1[kg]
V = volume = 20[cm^3]
density = 0.1 / (2 x 10^-5)
density = 5000 [kg/m^3]
a. 46 m/s east
The jet here is moving with a uniform accelerated motion, so we can use the following suvat equation to find its velocity:
where
v is the velocity calculated at time t
u is the initial velocity
a is the acceleration
The jet in the problem has, taking east as positive direction:
u = +16 m/s is the initial velocity
is the acceleration
Substituting t = 10 s, we find the final velocity of the jet:
And since the result is positive, the direction is east.
b. 310 m
The displacement of the jet can be found using another suvat equation
where
s is the displacement
u is the initial velocity
a is the acceleration
t is the time
For the jet in this problem,
u = +16 m/s is the initial velocity
is the acceleration
t = 10 s is the time
Substituting into the equation,