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Rainbow [258]
3 years ago
9

Which statement accurately describes the charge of the nucleus of an atom?

Physics
1 answer:
Aleksandr [31]3 years ago
3 0

Answer:

A. The nucleus can be either positively charged or neutral.

Explanation:

The nucleus of an atom contains protons and neutrons only. Whereas electrons revolve around the nucleus. Protons are positively charged, neutrons have no charge and electrons are negatively charged.

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4 years ago
A string under a tension of 36 N is used to whirl a rock in a horizontal circle of radius 3.6 m at a speed of 16.12 m/s. The str
ExtremeBDS [4]

Answer:

6010.457N

Explanation:

Centripetal acceleration = a= V²/R

At a radius of 3.6m and velocity of 16.12m/s,

Acceleration is

a = 16.12²/ 3.6 = 72.182 m/s²

Force = Mass (m) * Acceleration (a)

36 = m * 72.182

m = 36/72.182

At breaking point

Radius = 0.468 m and Velocity = 75.1 m/s

a = V²/R = 75.1²/0.468

a = 12051.3 m/s

F = Mass(m) * Acceleration (a)

F = m * 12051.3

m = F/ 12051.3

Settings the ratio of mass equal

m = m

=> 36/72.182 = F/12051.3

F = 12051.3 * 36/72.182

F = 6010.457N

3 0
4 years ago
A block of mass 3.7 kg, which has an initial velocity of 7.9 m/s at time t = 0, slides on a horizontal surface. Calculate the wo
Lady_Fox [76]

Answer:

115.6 J

Explanation:

m = mass of the block = 3.7 kg

v_{f} = final speed of the block = 0 ms⁻¹

v_{o} = initial speed of the block = 7.9 ms⁻¹

W = work done on the block

Using work done - change in kinetic energy theorem, we have

W = (0.5) m (v_{o}^{2} - v_{f}^{2})\\W = (0.5) (3.7) (7.9^{2} - 0^{2})\\W = 115.6 J

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4 years ago
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A positively charged particle is a proton.

Negatively charged particles are electrons.

Particles with no charge are neutrons.
5 0
3 years ago
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when forces on an object are acting in the same direction, how do you add them together to find the net force?
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If two forces act on an object in the same direction, the net force is equal to the sum of the two forces
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