<span>The glowing of a neon light is caused by electrons emitting energy as they </span>move from higher to lower energy levels.
You multiply your average speed with the time for which you have been traveling
Answer:
a) (2.436 × 10⁻⁷) Wb
b) (7.308 × 10⁻⁷) Wb
Explanation:
Magnetic flux is the dot product of the magnetic field vector and the Area vector.
Mathematically, it is given as
Φ = BA cos θ
where B = magnetic field strength
A = Cross sectional Area of the loop enclosed
θ = angle between the magnetic field and the plane of the area.
a) B = 0.250 T
To find A, the perimeter of the loop is given as 4.00 mm.
Perimeter of a square = 4L
4L = 4.00
L = 1.00 mm = 0.001 m
The area is given as L²
A = (0.001)² = 0.000001 m²
θ = 13°
Φ = BA cos θ
Φ = 0.25 × 0.000001 × cos 13°
Φ = 0.0000002436 Wb = (2.436 × 10⁻⁷) Wb
b) Another loop lies in the same plane but has an irregular shape, resembling a starfish. Its area is three times greater than that of the square loop
Φ = BA cos θ
B = 0.25 T
A = 3 × 0.000001 = 0.000003 m²
θ = 13°
Φ = 0.25 × 0.000003 × cos 13°
Φ = 0.0000007308 Wb = (7.308 × 10⁻⁷) Wb
Hope this Helps!!!
6. Since we are not sure if the person in the question is actively lifting the crate, we have to determine the downwards force of the crate due to gravity and compare it to the normal force.
F = ma
F = (15.3)(-9.8)
F = -150N
Since the downwards force of the crate is equivalent to the normal force, it means the person is applying no force in picking up the object. So to pick up a 150N object from scratch, you would have to exert more force than the weight of the object, so the answer is 294N.
7. Same idea as question 2.
First determine the weight of the object:
F = ma
F = (30)(-9.8)
F = -294N
The crate in question is not moving, so the magnitudes of the forces in the upwards and downwards direction has to equal to 0.
-294 + 150N + x = 0
x = 144N
So the person is exerting 144 N.
10. First find the force of block B to the right due to its acceleration:
F = ma
F = (24)(0.5)
F = 12N
So block B is moving 12N to the right relative to block A due to block A's movement to the left. However, block A is being applied a much greater force and is moving quicker to the left than block B is moving to the right of bock A. The force that is causing block B to experience the lower relative force to the right is because of the friction. To find the friction:
The sum of the forces in the leftward and rightward direction for block B must equal 12N.
75 - x = 12
x = 63N
So the force of friction of block A on block B is 63N to the left.
D is the answers Gases from a dead star gather and contract.
