Answer: Resonance
Explanation:
Resonance is a vibration set up in a body (house windows) due to a transfer of energy from another body (loud bass speaker) which is vibrating with a same or nearly equal frequency as that of the first.
Thus, resonance explains that once the natural frequency of the windows happens to be the same as the frequency of the speaker, vibrations occurs.
Answer:
The time taken for the commercial Jet liner to reach the end of its runway is 10.18 s.
Explanation:
Given;
average acceleration of the commercial Jet liner, a = 3g = 3 x 9.8 m/s² = 29.4 m/s²
distance traveled by the commercial Jet liner, s = 1542 m
The time taken for the commercial Jet liner to reach the end of its runway is calculated as follows;
s = ut + ¹/₂at²
where;
u is the initial velocity of the commercial Jet liner = 0
s = 0 + ¹/₂at²
s = ¹/₂at²
2s = at²
Therefore, the time taken for the commercial Jet liner to reach the end of its runway is 10.18 s.
#16
If we put a resistor in circuit it will slow the speed of current
Let's check ohms law
- So if resistance is more current is less
#17
Again use ohms law
- Voltage must be increased
Answer:
94.28 cm
Explanation:
The formula for elastic potential energy is given as;
PEel = 1/2 *k*x² where x is the displacement, k is the spring constant
Given
PEel = 110 J, k= 350 N/m then find x
PEel = 1/2 *k*x²
110 = 1/2 * 350 * x²
110 = 175 x²
110/175 = x²
0.6286=x²
√0.6286 =x
0.7928 m = x
79.28 cm = x
New length of spring = 15 cm + 79.28 cm = 94.28 cm
Answer:
a = 0.175 m/s^2
Explanation:
From newtons eauations of motion we know
v=u+at
here v= final velocity, u= initial velocity, a = acceleration, t= time
u = o( initialy object must be at rest)
therefore, 3.5 = 0+ a(20)
⇒ a = 3.5/20 =0.175 m/s^2