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2 years ago

Need help with problems 5,7,85 is not out7 is not up 8 is not 0N

Physics

1 answer:

Alex2 years ago

7 0

Answer:

Explanation:

To know the direction of the magnetic field created by the current I2, we need to place the right hand with the thumb in the direction of the current. Then, wrap the other fingers around the wire, so, the direction of your fingers is the direction of the magnetic field. Therefore, I2 creates a magnetic field that points In.

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An electron enters a region of space containing a uniform 2.71 × 10 − 5 2.71×10−5 T magnetic field. Its speed is 197 197 m/s and

Andrews [41]

Answer:

r = 0.0414mm

F = 757,692.3Hertz

Explanation:

If the body enters space with uniform magnetic field B, the force experienced by the object is expressed as

F = qvBsintheta... 1

Also, if the body undergoes a circular motion, the force experienced by the body in a circular path is given as

Fc = mv²/r... 2

Equating both forces

F = Fc

qvBsin theta = mv²/r

Since the body enters perpendicular to the field, theta = 90°

The equality becomes;

qvB sin90° = mv²/r

qvB = mv²/r

qB = mv/r

r = mv/qB

Given mass of the electron m = 9.11×10^-31kg

Velocity of the object v = 197m/s

Charge on the electron q = 1.6×10^-19C

Magnetic field B = 2.71×10^-5T

Substituting this value into the equation to get the radius r we have;

r = 9.11×10^-31 × 197/1.6×10^-19 × 2.71×10^-5

r = 1794.67×19^-31/4.336×10^-24

r = 413.89×10^-7

r = 0.0000414m

r = 0.0414mm

b) Frequency of the motion F = w/2π where w is the angular velocity

Since w = v/r

F = (v/r)/2π

F = v/2πr

F = 197/2π(0.0000414)

F = 757,692.3Hertz

6 0

4 years ago

You hold a bucket in one hand, and in the bucket is a 500 g rock. You swing the bucket so the rock moves in a vertical circle 2.

Blababa [14]

Answer:

3.28 m/s

Explanation:

From the question,

Applying newtons ,

F = mv²/r........................ Equation 1

Where m = mass of the rock, v = speed, r = radius of the circle, F = Centriputal force.

But,

Centriputal force is equal to the weight of the rock

F = mg................. Equation 2

Equate equation 2 into equation 1

mg = mv²/r

Therefore,

v = √gr...................... Equaion 3

Given: r = 2.2/2 = 1.1 m

Constant: g = 9.8 m/s²

Substitute into equation 3

v = √(9.8×1.1)

v = √(10.78)

v = 3.28 m/s

Hence the minimum speed is 3.28 m/s

5 0

3 years ago

PLEASE HELP!!!

bija089 [108]

C is the best answer choice

6 0

3 years ago

How to find final velocity

shepuryov [24]

Answer:

Explanation:

The equation or formula for velocity is similar to speed. To figure out velocity, you divide the distance by the time it takes to travel that same distance, then you add your direction to it.

8 0

3 years ago

Henry was giving the school toy for his birthday he can use it to tell how fast someone is moving at the moment in time the toy

pochemuha

Answer:

The toy must calculate the person's speed/velocity

Explanation:

Since the school toy given to Henry can be used to tell how fast someone is moving, the toy must be able to calculate the person's speed/velocity using the <u>average distance</u> covered by the person divided by <u>time taken</u> to cover the distance; average distance ÷ time taken.

The toy must be able to determine the parameters (average distance and time taken) in order to be able to calculate the person's speed/velocity

5 0

3 years ago