Answer:
between the plates.
Explanation:
The equation for change of voltage between two points separated a distance d inside parallel conducting plates (<em>which have between them constant electric field</em>) is:
So to calculate our electric field strength we use the fact that the potential 8.8 cm from the zero volt plate is 475 V:
And we use the fact that the plates are 9.2cm apart to calculate the voltage between them:
Answer:
s(t)=7t
Explanation:
We are given that
Length of side of square initially=0 cm
Side of square increasing at the rate=7 cm/s
We have to find the formula to express the side length of the square s(in cm) in terms of the number of seconds t.
According to question
Taking integration on both sides then, we get
Substitute t=0 and s=0
Now, substitute the value of C then, we get
s(t)=7t
This is required formula that express the side length of the square s(in cm) in terms of the number of seconds t, since the square's side length began growing.
Answer:
A. ) F₁ₓ = -45.0 N F₁y = 53.6 N
B.) F₂ₓ = 3.48 N F₂y = -19.7 N
C.) Fₓ = -41.5 N Fy = 33.9 N
D) F = 53.6 N
E) θ = -39. 2º (320.8º)
Explanation:
A)
- Applying simple trig, like definitions of cos and sin of an angle, we can get the x- and y- components of F₁, as follows:
B)
C)
- The x- and y- components of the resultant force, are just the algebraic
sum of the x- and - y components of F₁ and F₂:
- Fₓ = Fₓ₁ + Fₓ₂ = -45 N + 3.48 N = -41.5 N (5)
- By the same token, Fy can be written as follows:
- Fy = Fy₁ + Fy₂ = 53.6 N + (-19.7 N) = 33.9 N (6)
D)
- The magnitude of the resultant force can be obtained applying the Pythagorean Theorem to Fx and Fy, as follows:
E)
- Finally the angle regarding the x- axis of the resultant force vector, can be obtained using the definition of the tangent of an angle, as follows:
Answer:
mass = 36.92 kg
Explanation:
We have given the torque
Radius of the disk r = 0.50 m
Angular acceleration
We know that torque is given by here I is moment of inertia and is angular acceleration
So
Moment of inertia is given by
m = 36.92 kg
The given answer is not matched with this answer but after calculation i got m =36.92 kg
(a) The power of the bulb is P=60.0 W. Half an hour corresponds to a time of
so the energy used by the bulb during this time is
(b) The efficiency of the bulb is 12%, it means that it converts only 12% of the input energy into thermal energy, so the thermal energy is