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Ainat [17]
4 years ago
10

Which direction does the earth on its axis ?

Physics
2 answers:
Andrej [43]4 years ago
6 0

Counter clock wise amigito

Montano1993 [528]4 years ago
3 0
Another word is eastward
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A 0.45 m radius, 500 turn coil is rotated one-fourth of a revolution in 4.01 ms, originally having its plane perpendicular to a
AysviL [449]

Answer:

B = 0.126 T

Explanation:

As per Faraday's law we know that rate of change in magnetic flux will induce EMF in the coil

So here we can say that EMF induced in the coil is given as

EMF = \frac{\phi_2 - \phi_1}{\Delta t}

initially the coil area is perpendicular to the magnetic field

and after one fourth rotation of coil the area vector of coil will be turned by 90 degree

so we can say

\phi_1 = NBAcos 0 = BA

\phi_2 = NBAcos 90 = 0

now we will have

EMF = \frac{NBA}{t}

10,000 V = \frac{(500)(B)(\pi \times 0.45^2)}{4.01\times 10^{-3}}

B = 0.126 T

3 0
3 years ago
Consider 3 polarizers. Polarizer 1 has a vertical transmission axis and polarizer 3 has a horizontal transmission axis. Taken to
kirill [66]

Answer:

Option D.) 0.09 I₀

Explanation:

The intensity, I, of a polarized light after passing through a polarizing filter is given by I = I_{0} cos^{2}  \theta

I_{0} = Original Intensity

\theta = Angle between the direction of polarization and the axis of filter

After passing through the first polarizer, the initial intensity, I_{o} is halved, i.e I_{1} = \frac{I_{0} }{2}

After passing through the second polarizer, the angle of polarization, θ = 30⁰

I_{2} = I_{1} cos^{2} \theta

I_{2} = \frac{I_{0} }{2} cos^{2} 30\\I_{2} =\frac{3}{8} I_{0} \\I_{2} = 0.375 I_{0}

After passing through the third polarizer, the angle of polarization, θ = 90⁰-30⁰ = 60⁰

I_{3} = I_{2} cos^{2} \theta

I_{3} = 0.375I_{0} cos^{2} 60

I_{2} =0.09 I_{0}

7 0
4 years ago
The diagram shows the parabolic path of a projectile that leaves the foot of a kicker with a horizontal velocity of 15 m/s and a
rusak2 [61]

Answer:

I would increase the horizontal velocity or the vertical velocity or both to make the ball go the extra distance to cross the goal line.

Explanation:

In order to increase the horizontal distance covered by the ball, we need to examine the variables involved in the formula of range of projectile. The formula for the range of projectile is given as follows:

R = V₀² Sin 2θ/g

where, g is a constant on earth (acceleration due to gravity) and θ is the angle of ball with ground at the time of launching. The value of θ should be 45° for maximum range. In this case we do not know the angle so, we can not tell if we should change it or not.

The only parameter here which we can increase to increase the range is launch velocity (V₀). The formula for V₀ in terms of horizontal and vertical components is as follows:

V₀ = √(V₀ₓ² + V₀y²)

where,

V₀ₓ = Horizontal Velocity

V₀y = Vertical Velocity

Hence, it is clear from the formula that we can increase both the horizontal and vertical velocity to increase the initial speed which in turn increases the horizontal distance covered by the ball.

<u>Therefore, I would increase the horizontal velocity or the vertical velocity or both to make the ball go the extra distance to cross the goal line.</u>

4 0
3 years ago
Squids are the fastest marine invertebrates, using a powerful set of muscles to take in and then eject water in a form of jet pr
tatuchka [14]

Answer:

0.25 m/s

Explanation:

This problem can be solved by using the law of conservation of momentum - the total momentum of the squid-water system must be conserved.

Initially, the squid and the water are at rest, so the total momentum is zero:

p_i = 0

After the squid ejects the water, the total momentum is

p_f = m_s v_s + m_w v_w

where

m_s = 1.60 kg is the mass of the squid

v_s is the velocity of the squid

m_2 = 0.115 kg is the mass of the water

v_w = 3.50 m/s is the velocity of the water

Due to the conservation of momentum,

p_i = p_f

so

0=m_s v_s + m_w v_w

so we can find the final velocity of the squid:

v_s = -\frac{m_w v_w}{m_s}=-\frac{(0.115 kg)(3.50 m/s)}{1.60 kg}=-0.25 m/s

and the negative sign means the direction is opposite to that of the water.

8 0
3 years ago
A scientist records the motion of an object. She writes down that the
Phantasy [73]
The answer is Velocity
3 0
3 years ago
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