What is the charge of the nucleus

Answers

Answer 1

Answer: Protons are positive, electrons are negative, and neutrons are neutral. In the nucleus, there are protons and neutrons, so the charge of a nucleus is positive

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The distance-time graph for a vehicle standing on a road side will be

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Answer:

Explanation:

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Which one of the following is not part of john daltons atomic theory ?a)all elements are composed of atoms
b) all atoms of the same element have the same mass
c)atoms contain subatomic particles
d) a compound contains atoms of more than one element

Answers

c) atoms contain subatomic particles.

John Dalton's atomic model was also known as a 'Billiard Ball Model' because he thought that all atoms were just simple spheres, and nothing complex inside.

What is SNell's Law ?

Answers

is a formula used to describe the relationship between the angles of incidence and refraction, when referring to light or other waves passing through a boundary between two different isotropic media,

How does inertia affect a person without a seat belt?

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"an object in motion stays in motion" so without the seatbelt there to stop the person's body they will keep moving forward until another force stops them. Without the seatbelt, the person will fly forward, possibly through the windshield, onto the road.

first it can throw them out the window of a car
second there are just too many possibilities

i hope i helped

A box of books weighing 328 N moves witha constant velocity across the floor when it is
pushed with a force of 378 N exerted downward at an angle of 25.6◦ below the horizontal.
Find µk between the box and the floor.

Answers

Answer:

Approximately $0.694$ , assuming that the floor is level.

Explanation:

Between two surfaces that are moving relative to one another, the coefficient of kinetic friction $\mu_(k)$ is equal to the ratio between friction and normal force.

Since the box in this question is moving at a constant speed, the box would be in a translational equilibrium. Forces on this box should be balanced in both the horizontal component and the vertical component.

The value of $\mu_(k)$ in this question can be found in the following steps:

Decompose the external force into horizontal and vertical components.
Balance forces in the horizontal direction to obtain an expression for the friction on this object.
Balance forces in the vertical direction to find an expression for the normal force on this object.
Divide the magnitude of friction by the magnitude of the normal force to find the coefficient of kinetic friction, $\mu_(k)$ .

At an angle of $\theta = 25.6^(\circ)$ from the horizontal, magnitude of the vertical and horizontal components of the external force would be:

Horizontal component: $F\, \cos(\theta) = (378\; {\rm N})\, \cos(25.6^(\circ))$ .
Vertical component: $F\, \sin(\theta) = (378\; {\rm N})\, \sin(25.6^(\circ))$ .

Assume that the floor is level. Forces on this object in the horizontal direction would include:

Horizontal component of the external force, pointing in the direction of motion.
Friction from the ground, pointing backward opposite to the direction of motion.

Forces on this object are balanced in the horizontal direction. Hence, the magnitude of friction would be equal to that of the horizontal component of the external force:

$(\text{magnitude of friction}) = F\, \cos(\theta)$ .

Forces on this object in the vertical direction would include:

Weight of this object, pointing downward.
Vertical component of the external force, pointing downward.
Normal force from the ground, pointing upward.

Forces on this object in the vertical direction are also balanced. The magnitude of the normal force (pointing upward) should be equal to the sum of the magnitude of the two forces pointing downward:

$\begin{aligned} & (\text{magnitude of normal force}) \n =\; & (\text{magnitude of weight}) + F\, \sin(\theta)\end{aligned}$ .

It is given that the magnitude of the weight of this object is $328\; {\rm N}$ . To find the coefficient of kinetic friction, divide the magnitude of friction by the magnitude of the normal force:

$\begin{aligned}\mu_(k) &= \frac{(\text{magnitude of friction})}{(\text{magnitude of normal force})} \n &= \frac{F\, \cos(\theta)}{(\text{magnitude of weight}) + F\, \sin(\theta)} \n &= \frac{(378\; {\rm N})\, \cos(25.6^(\circ))}{(328\; {\rm N}) + (378\; {\rm N})\, \sin(25.6^(\circ))} \n &\approx 0.694\end{aligned}$ .

Generators need a source of energy to produce electricity. Which form of energy is a nonrenewable source of energy?hydro (water) energy

geothermal energy

fossil fuel

wind energy

Answers

Non-renewable energy are the form of energy whose source cannot be recycled and are limited in numbers. Out of all the options, only fossil fuel is Non-renewable otherwise all of them are renewable and can be recycled.

In short, Your Answer would be Option C) Fossil Fuel

Hope this helps!

Your Answer Would Be Fossil Fuel. All Of The Rest Are Renewavle. Hope This Helps!

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