Answer:
1.93 cm
Explanation:
The Image Equation for the first lens will be
1/f1 = 1/do - 1/d1
Where f1 = 17cm and d1 = 28.3cm
1/do = 1/f1 + 1/d1
= 1/17 + 1/ 28.3
do = 10.62cm
This image (which is real, inverted, and enlarged) becomes the object for the second lens as we again apply the Image Equation for the second lens
1/ f2 = 1/d2 + 1/d
Since the lenses are 12.8 cm apart, the image formed 10.62 cm to the left of lens #1 is located 2.18 cm to the right of lens #2 so the object distance, then, is
1/d2 = 1/f + 1/d
= 1/17 + 1/2.18
d2 = 1.93cm
The heat from the fire melting the wax helps close the circuit.
Answer:
Why are they used:
A carbon brush is a sliding contact used to transmit electrical current from a static to a rotating part in a motor or generator, and, as regards DC machines, ensuring a spark-free commutation.
Answer:
<h3>Can you please provide the choices? For now this is all I can give you.</h3>
Explanation:
In thermodynamics, an adiabatic process is a type of thermodynamic process which occurs without transferring heat or mass between the system and its surroundings.Unlike an isothermal process, an adiabatic process transfers energy to the surroundings only as work. It also conceptually supports the theory used to explain the first law of thermodynamics and is therefore a key thermodynamic concept.
Answer: final Velocity v = 10.2m/s
Explanation:
Final speed v(t) is given as
v(t) = u + at .......1
Where; u = the initial speed
a = acceleration
t = time taken
The total distance travelled d is given as
d = ut + 1/2(at^2)
Given
d = 5.0m
u = 2.0m
a = g = 10m/s2 (acceleration due to gravity)
Substituting into the equation above we have
5 = 2t + 5t^2
5t^2 +2t -5 = 0
Applying the quadratic formula. We have;
t = 0.82s & t = -1.22s
t cannot be negative
t = 0.82s
From equation 1 above
v = 2.0m/s + 10(0.82)m/s
v = 10.2m/s