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3 years ago

What is kinematics?explain ~

1 answer:

3 0

Kinematic equations are the equations that help to describe the motion of an object in constant acceleration. There are 4 of them and they are used in problems regarding motion when the variables are presented in them.

Ex:

Use V=Vo + at if you need to find velocity, and acceleration, time, and Vo are given to you

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A current of 02kA is traveling through a circularly looped wire. The wire makes 35 turns around an induced magnetic field of 8 9

PIT_PIT [208]

Answer:

The radius of the loop is $4.94\times10^{5}\ m$

Explanation:

Given that,

Current = 0.2kA = 200 A

Number of turns = 35

Magnetic field = 8.9 nT

We need to calculate the radius of one loop

Using formula of magnetic field

$B=\dfrac{N\mu_{0}I}{2r}$

$r=\dfrac{N\mu_{0}I}{2B}$

Where, I = current

N = number of turns

B = magnetic field

r = radius

Put the value into the formula

$r=\dfrac{35\times4\pi\times10^{-7}\times200}{2\times8.9\times10^{-9}}$

$r =494183.11\ m$

$r=4.94\times10^{5}\ m$

Hence, The radius of the loop is $4.94\times10^{5}\ m$

3 0

3 years ago

Hypothermia is a condition caused by exercising in extreme heat.

Salsk061 [2.6K]

False hypothermia is having an extremely low body temperature.....hope this helps

7 0

4 years ago

Read 2 more answers

Object A has of mass 7.20 kilograms, and object B has a mass of 5.75 kilograms. The two objects move along a straight line towar

Vera_Pavlovna [14]

If the collision is elastic, there is no loss in kinetic energies, which means that the total energies before and after impact are the same. So no need to worry about final velocities.

Final energy
= initial energy
= (1/2) (7.20*2.00^2+5.75*(-1.30)^2)
=19.26 joules

Answer: the total kinetic energy is 19.3 J. after collision.

8 0

4 years ago

How are frequency and wave period Related?

exis [7]

The frequency and period of any wave are reciprocals.

Frequency = 1/period and Period = 1/frequency .

That means that the product of (frequency) times (period) of any wave is always the same. The product is always ' 1 ', with no unit.

7 0

3 years ago

Firemen are shooting a stream of water at a burning building using a high-pressure hose that shoots out the water with a speed o

Mrac [35]

Answer:

a)α= 53.13°

b)The velocity at the highest point = 15 m/s

The acceleration at the highest point = 9.8 $m/s^2$

c)h=15 m

V=18.02 m/s

Explanation:

Speed of water ,u= 25 m/s

So the horizontal component of speed u = u cos α

Given that horizontal distance cover by water in 3 s is 45 m.

So We know that in projectile motion horizontal acceleration is zero.

In horizontal direction

Distance = Velocity x time

45 = u cos α x 3

u cos α = 45

45 = 25 cos α x 3

cos α = 45/75

α= 53.13°

So the velocity at the highest point = u cos α

The velocity at the highest point = 15 m/s

The acceleration at the highest point = 9.8 $m/s^2$

Now the velocity along vertical direction(Vo) = u sin α

Vo= 25 sin 53.13°

Vo =20 m/s

$h=V_o.t-\dfrac{1}{2}gt^2$

$h=20\times 3-\dfrac{1}{2}\times 10\times 3^2$

h=15 m

So at 15 m above the ground water will strike .

The y-component of velocity after 3 sec

Vy= Vo - g t

Vy = 20 - 10 x 3

Vy= -10 m/s

The horizontal component of velocity will remain 15 m/s.

The resultant velocity

$V=\sqrt{10^2+15^2}\ m/s$

V=18.02 m/s

5 0

4 years ago

What is kinematics?explain ~​

What is kinematics?explain ~