Answer:
<h2>a) 2.5 s</h2><h2>b) 1.55 m</h2><h2 />
Explanation:
<h3>Given :-</h3><h2>Completes 2 oscillation in 5s.</h2><h2>A) Time period = ?</h2><h2 /><h2>

</h2><h2 /><h2>

</h2>
<em>Thus 1 oscillation is completed in 2.5 </em><em>s.</em>
<h2>B) If g = 9.8 ms−², find its length.</h2><h2>

</h2><h3>= 2.5s </h3><h3>

</h3><h3>Length = ? </h3><h2>

</h2><h3 /><h3>

</h3>
Thus the length of g = 9.8 ms −² = 1.55m
<h2>
Hope it helps u.......</h2><h2>
STAY SAFE, STAY HEALTHY AND BLESSED .</h2><h2>
HAVE A MARVELOUS DAY AHEAD !</h2><h2>
THANK YOU !</h2>
Answer:
A spectroscope
Explanation:
A spectroscope is used by scientists to separate a source of light ( usually white light ) into its various compositions. i.e it is used to determine the chemical makeup of a visible source of light. hence to determine whether the red light produces photo electrons, which is a chemical makeup of visible light a spectroscope should be added to the circuit.
photo electrons are electrons emitted/ejected from a surface usually metallic surface in the form of a photoelectric effect when a source of light is shines on the surface
Answer:

Explanation:
Under this condition, . In order to suspend the wire, this magnetic force would have to be equal in magnitude to the gravitational force exerted by Earth on the wire the maximum force at angle
F=ILxB
Now to the suspend the wire so use the maximum force and solve to the current knowing the magnetic field of the earth
∑Fy=0


Solve to I current



I suggest do an toher act is really risk that current for an act
Answer:
0.
Explanation:
(A) Work done on the dresser which will be given as :
where, F = weight of the dresser = 3500 N

However you can move the dresser, that is a real distance,

Substituting,
(
is the angle at which you apply the force)

The "i" component of a vector is in the x-direction. Therefore, the x-component is 3 m/s.