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Ipatiy [6.2K]
3 years ago
9

Find the angles between vectors

Physics
1 answer:
pochemuha3 years ago
3 0

Answer:

<h2>1. Find the dot product of the vectors.</h2>

<h2>2. Divide the dot product with the magnitude of the first vector.</h2><h2 /><h2>3. Divide the resultant with the magnitude of the second vector.</h2>
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A parallel-plate capacitor with circular plates is charged by a constant current i. the radius a of the plates is much larger th
Fed [463]

1. The problem statement, all variables and given/known data A parallel-plate capacitor of capacitance C with circular plates is charged by a constant current I. The radius a of the plates is much larger than the distance d between them, so fringing effects are negligible. Calculate B(r), the magnitude of the magnetic field inside the capacitor as a function of distance from the axis joining the center points of the circular plates. 2. Relevant equations When a capacitor is charged, the electric field E, and hence the electric flux Φ, between the plates changes. This change in flux induces a magnetic field, according to Ampère's law as extended by Maxwell: ∮B⃗ ⋅dl⃗ =μ0(I+ϵ0dΦdt). You will calculate this magnetic field in the space between capacitor plates, where the electric flux changes but the conduction current I is zero.

7 0
3 years ago
The gradient of a displacement-time graph gives
Drupady [299]

Answer:

Velocity

Explanation:

The gradient= change in velocity

——————————

Change in time

7 0
4 years ago
If the coefficient of kinetic friction between tires and dry pavement is 0.84, what is the shortest distance in which you can st
liberstina [14]

Answer:

The shortest distance in which you can stop the automobile by locking the brakes is 53.64 m

Explanation:

Given;

coefficient of kinetic friction, μ = 0.84

speed of the automobile, u = 29.0 m/s

To determine the  the shortest distance in which you can stop an automobile by locking the brakes, we apply the following equation;

v² = u² + 2ax

where;

v is the final velocity

u is the initial velocity

a is the acceleration

x is the shortest distance

First we determine a;

From Newton's second law of motion

∑F = ma

F is the kinetic friction that opposes the motion of the car

-Fk = ma

but, -Fk = -μN

-μN = ma

-μmg = ma

-μg = a

- 0.8 x 9.8 = a

-7.84 m/s² = a

Now, substitute in the value of a in the equation above

v² = u² + 2ax

when the automobile stops, the final velocity, v = 0

0 = 29² + 2(-7.84)x

0 = 841 - 15.68x

15.68x = 841

x = 841 / 15.68

x = 53.64 m

Thus, the shortest distance in which you can stop the automobile by locking the brakes is 53.64 m

4 0
3 years ago
Two people are talking at a distance of 3.0 m from where you are and you measure the sound intensity as 1.1 × 10-7 W/m2. Another
Tanya [424]

Answer:I_2=0.618\times 10^{-7} W/m^2

Explanation:

Given

Distance between source and  receiver d_1=3 m

Sound Intensity I_1=1.1\times 10^{-7} W/m^2

Distance of of second observer d_2=4 m

Intensity varies as

I\propto \frac{1}{d^2}

using this

I=\frac{k}{d^2}

\frac{I_1}{I_2}=\frac{d_2^2}{d_1^2}

\frac{1.1\times 10^{-7}}{I_2}=\frac{4^2}{3^2}

I_2=0.75^2\times 1.1\times 10^{-7}

I_2=0.618\times 10^{-7} W/m^2

     

6 0
3 years ago
Choose the correct definition of angular momentum.
devlian [24]

The answer is "the product of the object's moment of inertia and the object's angular velocity.

3 0
3 years ago
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