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damaskus [11]
3 years ago
14

The direction of an electric field is the direction (5 points)

Physics
1 answer:
vlabodo [156]3 years ago
5 0

The direction of an electric field is determined from the behavior of a positive test charge that is set free in the electric field.This charge moves along a distinct vector showing the direction of the electric field  Therefore the answer is b. a positive charge will move in the field.

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A 25.0 kg projectile is fired by accelerating it with an electromagnetic rail gun on the earth's surface. the rail makes a 30.0
stich3 [128]

(a)

The work done on the projectile is 9375 joule.

The work on the projectile is calculated as

W=F×d

=1250×7.5

=9375 joule

(b)

The speed of the projectile after 7.5 m is 27.38 m/s

First we need to find out the acceleration of the projectile

F=m×a

1250=25×a

a=50 m/s^{2}

Now the velocity of the projectile after 7.5 m is calculated as

v^2=u^2+2a×s

v^2=0+2×50*7.5

v=27.38 m/s

8 0
3 years ago
Which two options describe physical properties of matter?
Stolb23 [73]

Answer:

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Maya uses a tuning fork of frequency 250 Hz to produce transverse wave on a stretched string. Her friend justin measure the dist
Viktor [21]

Answer:6.25m/s

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7 0
3 years ago
A moderate wind accelerates a pebble over a horizontal xy plane with a constant acceleration ModifyingAbove a With right-arrow e
Mandarinka [93]

To answer this problem we will make use of two of the equations of motion. Then we will come across out each velocity component. The difficult part comes in solving for the j component of velocity for which we will have to know t_f, the time it takes to be displaced (11m):<span>

Our equations 
1. v_f^2 = v_0^2 + 2ax </span>

<span>
2. v_f = v_0 + at 


<span>Solving for the time it takes to travel 11m</span></span>

<span><span>
We do so by finding the final velocity using (1), and then plugging that back into (2). </span></span>

<span><span>

v_fi^2 = 4^2 + 2*5*11 </span></span>

<span><span>
<span>v_fi^2 = 16 + 110 = 126</span></span></span>

<span><span><span>

v_fi = 11.22 m/s ((())) </span></span></span>

<span><span><span>

plugging this into (2) </span></span></span>

<span><span><span>

11.22 = 4 + 5*t_f </span></span></span>

<span><span><span>
5*t _f= 7.22</span></span></span>

<span><span><span>

t_f = 7.22 / 5 </span></span></span>

<span><span><span>

t_f = 1.444 seconds </span></span></span>

<span><span><span>

Solving for the vertical velocity </span></span></span>

<span><span><span>

v_fj = v_0j + at </span></span></span>

<span><span><span>
v_fj = 0 + 7*1.444 </span></span></span>

<span><span><span>

v_fj = 10.108 m/s ((())) </span></span></span>

<span><span><span>

Finding magnitude and angle </span></span></span>

<span><span><span>

V = sqrt(v_fi^2 + v_fj^2) </span></span></span>

<span><span><span>
</span></span></span>

125.884 + 10.108


V = 15.10151 m/s 

<span>

Angle:</span>

<span>
Theta = arctan(v_fj/v_fi) </span>

<span>
<span>Theta = 0.0801  radians </span></span>

<span>

converting radians to degrees (180/pi) </span>

<span>

Theta = .0.0801(180/pi) deg= 4.591 deg </span>

<span>

Answer: </span>

<span>
V = 15.10151 m/s </span>

<span>
<span>Theta = 4.591 deg</span></span>

6 0
3 years ago
PLZ HELP! Select the right word to complete the sentence: A blacksmith relies on (radiation, convection, or conduction) to trans
Musya8 [376]

Answer:

i think its conduction

Explanation:

3 0
3 years ago
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