Okay so here's the approach I took:
The potential difference in each of the circuits must be the same so if we derive equations for both the potential differences we can set them equal to each other and solve for R1:
In the first circuit
V = 2.2(R1)
In the second we have to find the equivalent resistor, since they are connected in series:
1/R1 + 1/R2 + 1/R3... = Rt
We have R2 so...
1/R1 + 1/3.1 = Rt
1/R1 + 0.323 = Rt
So...
V = 1.4(1/R1 + 0.323)
Set those equal:
2.2R1 = 1.4(1/R1 + 0.323)
2.2R1 = 1.4(1/R1) + 0.4522
Now multiply everything by R1 so we can combine like terms:
2.2R1^2 = 1.4 + 0.4522R1
Isolate to form a quadratic
2.2R1^2 - 0.4522R1 - 1.4 = 0
Solving this quadratic:
R1 = 0.90708 or R1 = -0.701
Since R cannot be negative
R1 = 0.907 ohms
the answer is the speed of blue ball after collision is 2.6v
Answer:
so the exact time can be measured
Explanation:
if it is not used then let's say 2 athletes finish the race at the time 20 second so it won't be exact and you would not know who is first and if it is used then you even know how much or which part of the second it is, hope you understand . brainy plzz
c. Energy and work
Explanation:
Energy and work done have the same unit of measurement. The unit of energy and work done is taken as the Joules(J).
- Energy is defined as the ability to do work. Energy is of two main forms.
- Potential energy is the energy at rest while kinetic energy is due to the motion of a body.
- All forms of quantitative energy calculations are expressed as the joules.
- Work done is the force applied to move a body through a particular distance.
Learn more:
Work done brainly.com/question/9100769
Energy brainly.com/question/4997571
#learnwithBrainly
<span>Let's convert the speed to m/s:
speed = (55 mph) (1609.3 m / mile) (1 hour / 3600 seconds)
speed = 24.59 m/s
Let's convert the mass to kilograms:
mass = (2135 lb) (0.45359 kg / lb)
mass = 968.4 kg
We can find the kinetic energy KE:
KE = (1/2) m v^2
KE = (1/2) (968.4 kg) (24.59 m/s)^2
KE = 292780 joules
The kinetic energy of the automobile is 292780 joules.</span>