B. Both of these types of lenses have the ability to produce real images.
Those reaction in which two or more substances combine to form a one new substance are called Combination reaction
In this reaction, We can add :
- Two or more elements can combine to form a compound.
- Two or more compounds can combine to from a one new compound.
- An element and a compound can combine to form a new compound.
In this, Hydrogen is an element and Oxygen is another element. Both are combined to form compound 'Hydrogen oxide'. Hydrogen oxide is commonly known as water.
Our Earth budget is how much energy we receive from the sun.
So the best answer is A
The force applied to the second ball by the first ball is 6.734 × 10^-4 N.
<h3>What is impulse of force?</h3>
The impulse of force is defined as the sum of the average force and the duration it is applied.
If the mass of the item remains constant, the impulse of force equals the change in momentum of the object.
Given that: mass of a metal sphere: m = 0.026 kg.
Initial speed of the sphere: u = 3.7 m/s.
When the sphere stops completely, its change in momentum = mu - 0
= 0.026×3.7 N-s.
= 0.0962 N-s.
As the spheres are in contact for 0.007s before the second sphere is shot off down the track, the force applied to the second ball =
change in momentum of 1st ball × time of contact
= 0.0962 × 0.007 N
= 0.0006734 N
= 6.734 × 10^-4 N.
Hence, the force applied to the second ball is 6.734 × 10^-4 N.
Learn more about impulse force here:
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Answer:
0.0222T
Explanation:
Frequency (f) =90 rev/s
Voltage = 1.15 v
Radius of coil = 1.00cm
= 0.01m
No of turns of wire (N) = 291
ω = 2πf
ω = 2π(90)
ω = 180π
A(t)= πr².sin ωt
= π(0.01)². Sin180πt
= 0.0001π.sin180πt
Differentiate A(t) with respect to t
dA/dt = 0.0001π . 180π . cos 180πt
EMF = - NB(dA/dt)
B = EMF/N(dA/dt)
B = 1.15/ -291(0.0001π . 180π . cos 180πt)
At the moment of induced voltage, cos180π = 1
B = 1.15/ -291(0.0001π . 180π . 1)
B = 1.15/ -51.7
B = 0.0222 T
The strength of the magnetic field = 0.0222T
