Answer: 0.687 m/s
Explanation:
Given
Mass of object, m = 76.7 g = 0.767 kg
Force constant of the spring, k = 3.34 N/m
Amplitude of the spring, x = 38 cm = 0.38 m
EPE(i) = KE(f) + EPE(f)
1/2kx(i)² = 1/2mv² + 1/2kx(f)²
1/2 * 3.34 * 0.38² = (1/2 * 0.767 * v²) + [1/2 * 3.34 * (0.38/2)²]
1/2 * 3.34 * 0.1444 = (1/2 * 0.767v²) + 1/2 * 3.34 * 0.0361
1/2 * 0.482 = 1/2 * 0.767v² + 1/2 * 0.121
0.241 = 1/2 * 0.767v² + 0.06
1/2 * 0.767v² = 0.181
0.767v² = 0.181 * 2
0.767v² = 0.362
v² = 0.362 / 0.767
v² = 0.472
v = √0.472
v = 0.687 m/s
There is not a time when the terminal voltage would exceed the emf. option A
<h3>What is the terminal voltage?</h3>
The terminal voltage is the voltage across the external circuit. We know that the emf is the voltage when current is not being delivered to the external circuit.
Now, we know that as current continue to be supplied to the external circuit the emf continues to drop. But it should be now that there is not a time when the terminal voltage would exceed the emf.
Learn more about terminal voltage:brainly.com/question/14218449
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Answer
When a body moves in projectile motion it has two components. One of the components is a horizontal component of the velocity and another is a vertical component.
The velocity along the horizontal component does not change because there is no acceleration long horizontal component.
Whereas velocity along vertical direction keeps on changing because the acceleration due to gravity is acting on the object. At a maximum height of the projectile velocity is equal to zero.
Answer:
20 m/s
Explanation:
First, you have to convert kilometers (72) to meters (72.000) then do the same with hours (1 hour) and seconds (3.600) Divide this numbers and you will get a result.
Answer:
magnetic field = - 6.137 × T
Explanation:
given data
radio wave λ = 0.3 m
intensity I = 45 W/m²
time t = 0
time t = 1.5 ns
to find out
What is Bz
solution
we use here equation of intensity of radiation of electric field that is express as
intensity = .................1
here we know intensity 45 and c is 3 × m/s² and ∈o is 8.85 × C²/N.m² and E will be here
E = ...............2
E =
E = 184.15
and
E = .................3
184.15 =
= 6.137 × T
and in z axis magnetic field will be here as
B = ..............4
here k =
k = = 20.94
and
f =
f = =
so here
time t =
t = =
so ω =
ω =
ω = 6.28 ×
so now from equation 4
B =
B =
B = - 6.137 ×
so magnetic field = - 6.137 × T