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3 years ago

3 m/s north is an example of a(n) ____.

2 answers:

6 0

It is velocity. Velocity is a vector quantity. Vector quantity has both magnitude and direction. 3 m/s north has 3 m/s as magnitude and north as direction.

alexandr1967 [171]3 years ago

4 0

Rate of speed (3 m/s north is three miles per second north, so it's a rate of speed)

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The rate of distance traveled per unit of time, without regard to direction

masya89 [10]

Answer: Speed

Explanation:

The speed of a body is the rate of distance (in metres) that it travels in one second. Hence, speed unlike velocity, is total distance travelled by the body without regard to direction divided by the total time taken.

i.e Speed = Distance / time taken

Thus, the standard international (SI) unit of speed is metres per second (m/s)

6 0

4 years ago

Read 2 more answers

A solenoidal coil with 21 turns of wire is wound tightly around another coil with 350 turns. The inner solenoid is 22.0 cm long

Thepotemich [5.8K]

Answer:

(a)The average of magnetic flux trough each turns is $3.63 \times 10^{-8}$ wb.

(b) The magnitude of mutual inductance of the two solenoid is $1.596 \times 10^{-5}$ H.

(c)The magnitude of emf induced in the outer solenoid by changing current in the inner solenoid is 0.027132 v .

Explanation:

Given that,

The number of turns of the solenoid=N₁= 350

The diameter of the solenoid=D= 2.20 cm=0.022

The length of the solenoid is = $l$ = 22.0 cm=0.22 m

The second solenoid with $N_2$ = 21 turns which is wound around the solenoid at its center.

The current in the inner solenoid is $I_1$ = 0.150 A and is increasing at a rate of 1700 A/s i.e $\frac{dI_1}{dt}= 1700$ A/s

(a)

The formula of magnetic field of a solenoid is

$B=\mu_0 nI=\frac{\mu_0 N_1I_1}{l}$

$=\frac{(4\pi \times 10^{-7} T.m/A) (350)(0.15 \ A)}{0.220 \ m}$

$\approx 3.0 \times 10^{-4}$ T

So, the magnetic flux of each turns

$\phi = BA=B \pi (\frac d2)^2$

$=(3.0\times 10^{-4}\ T)\pi (\frac {0.022}{2} \ m)^2$

$=1.14 \times 10^{-7}$ wb

The average of magnetic flux trough each turns is $3.63 \times 10^{-8}$ wb.

(b)

Since the both coil wound tightly. So, the magnitude magnetic flux though each turns of both coils is same.

The mutual inductance of the two solenoid is

$M=\frac{N_2\phi}{I_1}$

$=\frac{(21)(1.14 \times 10^{-7}\ wb)}{0.15\ A}$

$=1.596 \times 10^{-5}$ H

(c)

The formula of emf is

$\varepsilon =-M\frac{dI_1}{dt}$

$=-(1.596\times 10^{-5}\ H) (1700 \ A/s)$

$=27.132 \times 10^{-3}$ v

=0.027132 v

The emf induced in the outer solenoid by changing current in the inner solenoid is 0.027132 v .

4 0

3 years ago

a straight, 2.5-m wire carries a typical household current of 1.5 a (in one direction) at location where the earth's magnetic fi

kotykmax [81]

Answer:

The magnitude of the force is $F=2.1*10^{-4}N$

The direction is from south to north i.e upward

The magnitude of the force is $F=2.1*10^{-4}N$

The direction is towards the west

The magnitude of the force is $F=2.1*10^{-4}N$

the direction of the magnetic field is parallel to the direction of the current (south to north ) hence the direction in 0 in comparison to the direction of the current

From the value of force we got the answer to this question is No

Explanation:

Generally magnetic force is mathematically represented as

$F = BIL$

Where the B is the magnitude of the magnetic field which is given as

$B= 0.55 guass = \frac{0.55}{10000} = 0.55 *10^{-4}T$

$I$ is the current with a value of $I = 1.5A$

L is the length of the wire given as $L =2.5m$

Substituting the value

$F =(0.55 *10^ {-4}) (1.5)(2.5)$

$F=2.1*10^{-4}N$

For the first case where the current is moving from west to east and we are told that the magnetic field is from south to north the according to Fleming's right hand rule the force(exerted by earths magnetic field ) would be moving from south to north (i.e upward)

For the second case where current is moving vertically upwards the direction of the force is to the west according to Fleming's right hand rule

7 0

3 years ago

Read 2 more answers

How are men's and women's lacrosse the same?

murzikaleks [220]

Answer:

they are both played by hoomans

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3 years ago

How does a pedometer help people reach their fitness goals

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