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olchik [2.2K]
3 years ago
10

Anybody please help me with these questions... I really need help...

Physics
1 answer:
zhannawk [14.2K]3 years ago
6 0
Remember, Your electric field lines drawn from positive charge (protons) and goes to negative charge (electron)

So, Your Answers would be:
15) B) Positive

16) A) Negative 

17) B) Positive

18) A) Negative 

19) B) Positive 

20) B) Positive 

Hope this helps!
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1. False
2. Positive
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Which circuit would have the most electrical power? ​
myrzilka [38]

Answer:

c

Explanation:

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A box weighing 4.0 N is lifted 3.0 meters. How much work is done on the box?
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6 0
3 years ago
A proton is moving in a circular orbit of radius 20 cm under a uniform magnetic field 0.3 t perpendicular to the velocity of the
Vladimir [108]

Answer:

v = 5.75 x 10⁶ m/s

Explanation:

The radius (r) of the circular orbit taken by a charged particle is related to its speed perpendicular to a magnetic field of strength B, and is given by

r = \frac{mv}{qB}       --------------(i)

Where,

q = charge of the particle

m = mass of the particle

Making v subject of the formula in equation (i) above gives

v = \frac{qBr}{m}  -------------------(ii)

Given;

r = 20cm = 0.2m

B = 0.3T

v = unknown

q = charge of proton = 1.6 x 10⁻¹⁹ C

m = mass of the proton = 1.67 x 10⁻²⁷kg

Substitute the values of m, q, B and r into equation (ii) above to get;

v = \frac{1.6 * 10^{-19} * 0.3 * 0.2} {1.67*10^{-27} }

Solving for v gives:

v = 5.75 x 10⁶ m/s

Therefore, the velocity of the proton is 5.75 x 10⁶ m/s

4 0
3 years ago
Pilots of high-performance fighter planes can be subjected to large centripetal accelerations during high-speed turns. Because o
nika2105 [10]

Answer:

Ratio is 7.58

Explanation:

At the bottom of the circle, the net force is given by

F_{n}=mv^{2}+mg where m is mass of plane, v is the speed of plane, r is vertical circle radius

F_{n}=m(v^{2}+g)

Since W=mg, dividing left side by W and right side by mg we obtain

\frac {F_{n}}{W}= \frac {m(v^{2}+g)}{mg}

\frac {F_{n}}{W}=g(g+\frac {v^{2}}{r})

\frac {F_{n}}{W}=9.81(9.81+\frac {216^{2}}{723})=7.578096

\frac {F_{n}}{W}=7.58

Considering that \frac {F_{n}}{W}=7.58 which is greater than 2, the pilot is advised to wear the anti-G suit

6 0
3 years ago
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