Answer:
Explanation:
F = ma
mgsinθ - μmgcosθ = ma
gsinθ - μgcosθ = a
μgcosθ = gsinθ - a
μ = (gsinθ - a) / gcosθ
μ = (9.81sin24 - 0.245) / 9.81cos24
μ = 0.4178906...
μ = 0.418
D. All the three bulbs connected in the series circuit will burn at equal brightness.
<h3>What is series circuit?</h3>
A series circuit comprises a path along which the whole current flows through each component.
A parallel circuit comprises branches so that the current divides and only part of it flows through any branch.
In a series circuit, same current flows in each component of the circuit.
V = I(R₁ + R₂ + R₃)
where;
- R₁ is resistance of bulb 1
- R₂ is resistance of bulb 2
- R₃ is resistance of bulb 3
If all the bulbs have equal resistance, they will burn at equal brightness.
Thus, all the three bulbs connected in the series circuit will burn at equal brightness.
The correct option is D.
Learn more about series circuit here: brainly.com/question/19865219
#SPJ1
Answer:
Explanation:
Let the distance be d . When sound travels d and is reflected back , it is heard by person as echo . Time taken by sound to travel total of distance 2 d
= 2 d / v where v is velocity of sound.
When this time is .05 s at least , echo will be heard . velocity of sound in air 340 m /s
so for echo to be heard ,
2 d / 340 = .05
d = 340 x .05 / 2
= 8.5 m .
Never are fully correct but b would be most right
Answer:
Hey!
Your answer is "First-Class Lever"
Explanation:
Here's an example!!
The fulcrum (the triangle) is between the load and effort! (in this case called the FORCE)
Hope this helps!