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hodyreva [135]
4 years ago
8

The ocean is salty because it contains many dissolved ions. As these charged particles move with the water in strong ocean curre

nts, they feel a force from the earthâs magnetic field. Positive and negative charges are separated until an electric field develops that balances this magnetic force. This field produces measurable potential differences that can be monitored by ocean researchers. The Gulf Stream moves northward off the east coast of the United States at a speed of up to 3.5 m/s . Assume that the current flows at this maximum speed and that the earthâs field is 50 μT tipped 60 degrees below horizontal.
Part A
What is the direction of the magnetic force on a singly ionized negative chlorine ion moving in this ocean current? Choose best answer
(a) east
(b) west
(c) up
(d) down
Part BWhat magnitude electric field is necessary to exactly balance this magnetic force?
Choose best answer.
(a) 1.8 x 10-4 N/C
(b) 1.5 x 10-4 N/C
(c) 1.0 x 10-4 N/C
Physics
1 answer:
Yuliya22 [10]4 years ago
8 0

Given that,

Speed = 3.5 m/s

Magnetic field = 50μT

Angle = 60°

(A). We need to find the direction of magnetic force

Using formula of magnetic force

\vec{F}=q(\vec{v}\times\vec{B})

Here, (\vec{v}\times\vec{B})= down

But , charge is negative.

So, the direction of magnetic force will be up.

(B). We need to calculate the magnetic electric field

Using formula of magnetic force

F=qvB\sin\theta

qE=qvB\sin\theta

E=vB\sin\theta

Where, v = speed

B = magnetic field

Put the value into the formula

E=3.5\times50\times10^{-6}\sin60

E=0.000151\ N/C

E=1.5\times10^{-4}\ N/C

Hence, (A). The direction of magnetic force is UP

(c) is correct option

(B). The magnetic electric field is 1.5\times10^{-4}\ N/C

(b) is correct option

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sergeinik [125]

Answer:

v_{f} = 3.8 m/s

Explanation:

When the runner start the running, she is at rest. So the initial velocity of the runner is zero (0 m/s). And then she accelerates at  a rate of 1.9 m/s² for 2.2 s. But we need to find the final velocity after t = 2 s when she starts the running. So, we take time equal to 2 second.

Given data:

Initial velocity = v_{i} = 0 m/s

Acceleration = a = 1.9 m/s²   (for 2.2 s after starting the race)

Time = t = 2 s

Final velocity = v_{f} = ?

According to the First equation of motion

v_{f} =  v_{i} + at

v_{f} = 0 + (1.9)(2)

v_{f} = 3.8 m/s

4 0
4 years ago
HELP ME ASAP ITS PHYSICS AND it’s finding the kinetic energy SHOW WORKKK
lord [1]

k = 1/2 × m × v^2

_____________________________

1. k = 1/2 × 60 × ( 10 )^2

k = 30 × 100

k = 3000 j

_____________________________

2. k = 1/2 × 60 × ( 9 )^2

k = 30 × 81

k = 2430 j

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3. k = 1/2 × 60 × ( 4 )^2

k = 30 × 16

k = 480 j

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4. k = 1/2 × 60 × ( 6 )^2

k = 30 × 36

k = 1080 j

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5. k = 1/2 × 60 × ( 0 ) ^2

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6 0
3 years ago
Read 2 more answers
Par 1/2
BaLLatris [955]

part 1

mass = ρ x V

mass = 1739 kg/m³ x 3.8 km³ = 6608.2 kg

PE (potential energy)= mgh

PE = 6608.2 kg x 9.81 x 403

PE = 2.61 x 10⁷ J

part 2

megaton of TNT (Mt) =4.2 x 10¹⁵ J

convert PE to Mt:

2.61 x 10⁷ J : 4.2 x 10¹⁵ J = 6.21 x 10⁻⁹ Mt

4 0
3 years ago
PLEASE HELP!!
astraxan [27]

Answer:

Explanation:

\lambda\\ = v/f

^That is the formula we are going to use.

Now, we were given the speed (v), which is 20.

Now we need to find frequency, in order to solve for the wavelength.

Frequency is the amount of waves in a fixed unit of one second, meaning our F value is the value of 5 divided by 4.

5/4 = 1.25

Therefore our F is 1.25

Now lets plug it in

\lambda\\ = v/f

\lambda\\ = 20/1.25

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Conversion:

\lambda\\ = 8

3 0
3 years ago
Ur a genius if u explain how it’s A correctly
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Answer:

Explanation:

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D has the least number so its D

6 0
3 years ago
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