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3 years ago

Question 5

2 answers:

5 0

Neutrons have no electrical charge

protons have a positive charge

electrons have a negative charge

Atoms mainly consist of a positively charged nucleus surrounded by one more negatively charged electrons, but overall the atom has no charge so it would neutral!

hope this helps!!

Marta_Voda [28]3 years ago

4 0

Answer: A Neutron.

I know this is correct. Thank's and yw :3

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Lars is standing near the edge of a 90-meter cliff. He throws a ball upward, but does not catch it, and it falls to the bottom o

Kipish [7]

Answer:

c. 43 m/s

Explanation:

Given the following data;

Displacement, S = 90 meters

Time, t = 5.55 seconds

To find the initial velocity;

We would use the second equation of motion given by the formula;

$S = ut + \frac {1}{2}at^{2}$

Where;

S represents the displacement or height measured in meters.

u represents the initial velocity measured in meters per seconds.

t represents the time measured in seconds.

a represents acceleration measured in meters per seconds square.

We know that acceleration due to gravity is -9.8m/s² because the direction is downward.

Substituting into the equation, we have;

$90 = u*5.55 + \frac {1}{2}*(-9.8)*5.55^{2}$

$90 = u5.55 - 4.9*30.8025$

$90 = u5.55 - 150.93225$

Rearranging the equation, we have;

$u5.55 = 90 + 150.93225$

$u5.55 = 240.93225$

$u = \frac {240.93225}{5.55}$

Initial velocity, u = 43.41 ≈ 41 m/s

4 0

3 years ago

The image below shows two opposite forces acting on a rope, what can we say is true about the affect of the forces on the rope?

Tamiku [17]

It would be D) the rope is pulled to the right. This is because their is a greater force in that direction.

8 0

3 years ago

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The key to making a concise mathematical definition of escape velocity is to consider the energy. If an object is launched at it

abruzzese [7]

Answer:

dado os monômios X elevado a 2 + 2 elevado a 2 menos 6 elevado a 2 a redução dos monômios está representado na questão em que os monômios a seguir eles representam quatro graus dê valor numérico da expressão m + n = 20 x elevado a 7 Y.

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3 years ago

A 0.0208 m diameter coin rolls up a 18.0◦ inclined plane. The coin starts with an initial angular speed of 56.0 rad/s and rolls

anastassius [24]

Answer:

h = 0.0259 m

Explanation:

given,

diameter of the cone = 0.0208 m

radius,r = 0.0104 m

angle of inclination,θ = 18°

initial angular velocity, ω_i = 56 rad/s

final angular velocity ,ω_f = 0 rad/s

height, h = ?

Rotational kinetic energy

$KE_r = \dfrac{1}{2}I\omega^2$

Moment of inertia of coin

$I = \dfrac{1}{2}MR^2$

so,

$KE_r = \dfrac{1}{4}MR^2\omega^2$

Transnational Kinetic energy

$KE_t = \dfrac{1}{2}Mv^2$

v = r ω

$KE_t = \dfrac{1}{2}MR^2\omega^2$

now,

using conservation energy

Kinetic energy of the coin is converted into the potential energy

KE_r + KE_t = PE

$\dfrac{1}{4}MR^2\omega^2 + \dfrac{1}{2}MR^2\omega^2 = Mgh$

$\dfrac{3}{4}R^2\omega^2=gh$

$\dfrac{3}{4}\times 0.0104^2\times 56^2=9.8\times h$

h = 0.0259 m

Vertical height gain by the coin is equal to 0.0259 m

7 0

4 years ago

Three long cables running north and south, are tightly enclosed in an insulating sheath. One of the cables carries a 23 A curren

Nikolay [14]

Answer:

Explanation:

Magnitude of magnetic field due to a current carrying conductor

= ( μ₀ / 4π ) x 2I / d , I is current , d is distance from wire . This formula has been derived from Ampere's Law.

= 10⁻⁷ x 2 x 23 / 10 Current given I = 23

= 46 x 10⁻⁸ T .

Magnetic field due to current 17 A

10⁻⁷ x 2 x 17 / 10

= 34 x 10⁻⁸ T .

Magnetic field due to current 11 A

10⁻⁷ x 2 x 11 / 10

= 22 x 10⁻⁸ T .

magnetic field due to current 17 A and 11 A are in same direction so total magnetic field

= 34 x 10⁻⁸ + 22 x 10⁻⁸

= 56 x 10⁻⁸ T

magnetic field due to current 23 A in opposite direction so total magnetic field

= 46 x 10⁻⁸ - 56 x 10⁻⁸

= - 10 x 10⁻⁸ T

Magnitude = 10 x 10⁻⁸ T .

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3 years ago