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mihalych1998 [28]
4 years ago
10

A ball is thrown against a wall and bounces back toward the thrower with the same speed as it had before hitting the wall. Does

the velocity of the ball change in this process?A) Although the speed is the same, the direction has changed. Therefore, the velocity has changed.B) The velocity is the same because the speed is the same.C) Without knowing the mass of the ball, the velocity is not determined.D) The velocity is now twice as large because the ball is going into the opposite direction.
Physics
1 answer:
lorasvet [3.4K]4 years ago
4 0

Answer:

A) Although the speed is the same, the direction has changed. Therefore, the velocity has changed.

Explanation:

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Suppose a uniform electric field 4 N/C is in the positive x-direction .
LuckyWell [14K]

The magnitude of the electric field at x =4m on the x axis at this time 1 N/C.

<h3>Electric field at position 4 m</h3>

Electric field at a given distance is calculated as follows;

E = kq/r²

E₂ = (9 x 10⁹ x q)/(2²)

E₂ = 2.25 x 10⁹q

E₂ + E₀ = 0

2.25 x 10⁹q + 4 = 0

2.25 x 10⁹q = - 4

q = -4 / (2.25 x 10⁹)

q = -1.78 x 10⁻⁹

E₄ = (9 x 10⁹ x (-1.78 x 10⁻⁹) ) / (4²)

E₄ = - 1 N/C

|E₄| = 1 N/C

Thus, the magnitude of the electric field at x =4m on the x axis at this time 1 N/C.

The complete question is below:

Suppose a uniform electric field of 4N/C is in the positive x direction. When a charge is placed and at a fixed to the origin, the resulting electric field on the x axis at x =2m becomes zero. What is the magnitude of the electric field at x =4m on the x axis at this time?

Learn more about electric field here: brainly.com/question/14372859

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8 0
2 years ago
3.00 m^3 of water is at 20.0°C.
krok68 [10]

Answer:

9m^3

Explanation:

Given data

volume  v1=  3m^3

volume  v2=  ???

Temperature T1= 20.0°C.

Temperature T2= 60.0°C.

Applying the relation for temperature and volume

V1/T1= V2/T2

substitute

3/20= V2/60

3*60= V2*20

180= 20*V2

180/20= V2

V2= 9m^3

Hence the final volume is 9m^3

6 0
3 years ago
The true shape of planetary orbits was discovered by _____.
White raven [17]
Kepler discovered the elliptical shape in the orbital path.<span />
6 0
3 years ago
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The direction of swing of a Foucault pendulum appears to change due to Earth’s
Salsk061 [2.6K]
French Physicist Leon Foucault introduced his pendulum in 1851.
By that time, it was generally accepted that the Earth rotates, but
Foucault's pendulum was the first simple demonstration that made
the Earth's <u>rotation</u> easy to prove.
6 0
3 years ago
A traveler first drives 21.0 km east, then 29.1 km southeast, and finally 10.3 km south. Find the traveler's total displacement.
Vinvika [58]

The traveler's total displacement is 53.2 km.

The shortest distance between a particle's starting position and destination is referred to as its displacement vector. Displacement has a distinct physical magnitude than distance. Let's use the motion of a particle making a complete circle as an example. The displacement in this motion is zero, yet the distance traveled is equal to the circle's circumference. The individual displacement vectors are as follows: d1

=22^ikm→d2

= (29.7cos45i29.7sin45) kmd3=104jkm

The traveler's complete disadvantage is,

→d=→d1+→d2+→d3→d

=22^ikM+29.7

cos45^−29.7sin45o) km−10.4^j km→

d=(43^i−31.4^j) km

The magnitude of the total displacement is,

d=√432+31.4/2Km d≈53.2km

The direction is,

θ=tan−1(−31.4/43)

θ=−36.1or 36.1 south of east.

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brainly.com/question/11934397

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7 0
2 years ago
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