If the Mass Number is the sum of the protons and neutrons in an atom, what is
the mass number of

Answer:

4.00 A

Explanation:

Answer:

At the december solstice,the northern hemisphere is leaning most away from the sun for the year.At the december solatric,earth is positioned in its orbit so that the sun below the north pole horizon. After the winter solstice,the days get longer,and the night shorter.

Answer:

Why ?? What happened ??

Answer:

The correct option is the last option.

Explanation:

Generally, when trying to create a mechanical advantage of a lever for an apparatus or a machine, the load is usually moved closer to the fulcrum. Hence, if a lever has a total length of 12 meters and the fulcrum is placed at 6 meters (the center), the best way (based on the previous statement) to double the mechanical advantage of the lever is to move the fulcrum 4 meters toward the side on which the force is applied. The correct option is the last option.

Answer: the answer  is  not  d  idk wat it is sorry but its not d

Answer:

35 m/s

Explanation:

Given that an automobile was moving at 15m/s and accelerated at 2m/s^2 for 10s. what is the final speed ?

The parameters given are :

initial velocity U = 15 m/s

Acceleration a = 2 m/s^2

Time taken = 10s

Using first equation of motion;

V = U + at

V = 15 + 2 * 10

V = 15 + 20

V = 35 m/s

Therefore, The final speed is 35 m/s

The final speed of automobile moving at the given initial speed and acceleration is 35m/s.

Given the data in the question;

Final velocity of the automobile; [tex]v = ?[/tex]

To determine the final velocity of the automobile, we use the First Equation of Motion:

[tex]v = u + at[/tex]

Where v is final velocity, u is initial velocity, a is acceleration and t is time taken.

We substitute our given values into the equation

[tex]v = 15m/s + [ 2m/s^2 * 10s ]\\\\v = 15m/s + 20m/s\\\\v = 35m/s[/tex]

Therefore, the final speed of automobile moving at the given initial speed and acceleration is 35m/s.

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Answer:

140KG

Explanation:

Explanation:

Acceleration is the rate of change in the speed of an object. If initial and final speed are v₁ and v₂. It changes speed in time t. Its formula is given by :

[tex]a=\dfrac{v_2-v_1}{t}[/tex]

The problem is "A skater increases her velocity from 2.0 m/s to 10.0 m/s in 3.0 seconds. What is the skater’s acceleration? "

In this problem,

v₁ = 2 , v₂ = 10 m/s and t = 3 s

Acceleration of the object,

[tex]a=\dfrac{10-2}{3}\\\\a=2.67\ m/s^2[/tex]

So, the acceleration of the skater is [tex]2.67\ m/s^2[/tex].

Answer: An aquifer is a body of saturated rock through which water can easily move. Aquifers must be both permeable and porous and include such rock types as a sandstone.

Explanation: However, if these rocks are highly fractured, they make good aquifers.

Answer:

wheel and axle

Explanation:

hope this helps

Answer:

[tex]\boxed {\tt t\approx 38.89 \ s}[/tex]

Explanation:

Time can be found by dividing the distance by the speed.

[tex]t=\frac{d}{s}[/tex]

The distance is 350 meters.

The speed is 9 meters per second.

[tex]d= 350 \ m \\s= 9 \ m/s[/tex]

Substitute the values into the formula.

[tex]t=\frac{350 \ m}{9 \ m/s}[/tex]

Divide. Note that the meters or "m" will cancel each other out and the seconds or "s" will move to the numerator.

[tex]t=\frac{350 }{9 \ s}[/tex]

[tex]t=\frac{350 \ s}{9}[/tex]

[tex]t=38.8888889 \ s[/tex]

Round to the nearest hundredth. The 8 in the thousandth place tells us to round the 8 to a 9.

[tex]t \approx38.89 \ s[/tex]

It will take about 38.89 seconds to swim 350 meters at 9 meters per second.

Answer:

Radius, r = 100321.43m or 10.03 * 10^4m

Explanation:

Given the following data;

Acceleration, a = 0.028m/s²

Speed = 53m/s

Centripetal acceleration is given by the formula;

[tex] Acceleration, a = \frac {v^{2}}{r}[/tex]

Substituting into the equation, we have;

[tex] Acceleration, a = \frac {53^{2}}{0.028}[/tex]

[tex] Acceleration, a = \frac {2809}{0.028}[/tex]

Radius, r = 100321.43m or 10.03 * 10^4m

Answer:

The process of comparison of unknown quantity with the help of known standard quantity is known as measurement...Hope this helps:)

Answer:

the comparison of an unknown quantity with the known quantity.

Explanation:

...........................................................................................................................

Answer:

D

Explanation:

Answer:

The forces between the charges is [tex]1.66*10^{-3} N[/tex]

Explanation:

Data given:

First charge [tex]q_{1} =4.2*10^{-9} C[/tex]

Another charge [tex]q_{2} =1.1*10^{-9} C[/tex]

Distance (r)= (0.005)m

Force(F)=?

It is based on Electrostatic force between two charges i.e. defined by Coulomb's law.

The force acting between two static charges, is called electrostatic force.

The force acting between two charges is

(a) directly proportional to the product of charges F ∝ [tex]q_{1} q_{2}[/tex]

(b) inversely proportional to the square of the separation. F ∝ [tex]\frac{1}{r^{2} }[/tex]

From above;

[tex]F=k.\frac{q_{1} q_{2} }{r^{2} }[/tex]

On putting values: -

[tex]F=1.66*10^{-3} N[/tex]

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Answer:

1

 [tex] t_a  =  13.49 \  s   [/tex]

2

 The distance is   [tex] D = 55.2 \  m  [/tex]    

Explanation:

From the question we are told that

   The maximum speed of the cheetah is  [tex]v =  103 \  km/h =  28.61 \  m/s[/tex]

    The maximum of  gazelle is  [tex]u =  76.5 \  km/h =  21.25 \  m/s[/tex]

     The distance ahead is [tex]d =  99.3 \  m[/tex]

Let  [tex]t_a[/tex] denote the time which the cheetah catches the gazelle

Gnerally the equation representing the distance the cheetah needs to move in order to catch the gazelle is

           [tex] v* t_a = d +  u* t_a [/tex]

=>          [tex] 28.61 t_a = 99.3 +  21.25t_a [/tex]

=>          [tex] 7.36 t_a = 99.3  [/tex]

=>         [tex] t_a  =  13.49 \  s   [/tex]

Now at t =  7.5 s  

             [tex]7.5 v = D+  7.5u [/tex]

=>          [tex] 28.61 * 7.5  = D +  21.25* 7.5  [/tex]

=>          [tex] 7.36 *  7.5 =D  [/tex]

=>         [tex] D = 55.2 \  m  [/tex]        

Hence the for the gazelle to escape the cheetah it must be 55.2 m

Answer:

Alkaline earth metals.

Explanation:

For e.g The metals of group ll are: Be, Mg, Ca, etc

Answer:-2.0

Explanation:khan academy

Answer:

the volume increase

Explanation:

because because when the speed of the vibrations decrease the speech of the sounds become loud

Answer:

Motion

Acceleration is the change of velocity per unit time, so if there is no force, all we know is that the acceleration is zero. Therefore, the velocity is not changing. If the object was already moving, then it will just keep moving. So, the object can be moving even when there is no force applied to it.

Forces may cause an object to change its state if it is unable to move. The force make the object to move from its state of rest.

Force is an external agent acting on an object to deform it or to change it state of rest or motion. There are various kinds of forces such as gravitational force, nuclear force, magnetic force, frictional force etc.

Force is a vector quantity thus, it is characterised by its magnitude and direction. According to Newton's first law of motion, an object will continue in its state or motion or rest until an external force acts on it.

Therefore, force changes the state of an object. Force is dependant on the mass of the object. Greater the mass, greater will be the force required to move the object from stationary to stop it from motion.

According to second law of motion, force is the product of mass and acceleration of the object. Hence, force accelerates the body and a change in force changes the acceleration of the object.

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Answer:

Intrusive igneous rocks cool from magma slowly because they are buried beneath the surface, so they have large crystals. Extrusive igneous rocks cool from lava rapidly because they form at the surface, so they have small crystals. Texture reflects how an igneous rock formed

Explanation:

Answer:

1305 I think but not sure

Answer:

Explanation:

By multiplying the rotational frequency with the circumference we can determine the average speed of the object. The circular velocity formula is expressed as, vc = 2 πr / T. Where in, r denotes the radius of the circular orbit. T is time period.

Answer:

2πr

as we know that the circumference of a circle is 2 * π * r, the arc length of the whole circle is 2πr units. Then using the formula s = r * theta, the angle theta equals the arc length divided by the radius. Therefore theta = 2πr/r = 2π radians.

I hope it will helpful for you

mark as brainest answer

thank you

Answer:

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\ [/tex]

We have

[tex]density = \frac{224}{53} \\ = 4.2264150943396...[/tex]

We have the final answer as

Hope this helps you

Answer:

The density is 4.2

Explanation:

D=M/V

Density is equal to mass/Volume thus D=M/V

c                                                                                                                                                  cccccccccccccccccccccccccccccccccccccccccccccccccccccc

Answer: C, making the parts slippery

Explanation: I chose d and it said it was wrong so I chose C and it was right lol

Answer:

Power your home with renewable energy.

Weatherize, weatherize, weatherize.

Invest in energy-efficient appliances.

Reduce water waste.

Actually eat the food you buy—and make less of it meat.

Explanation:

Answer:

A. How much matter an object has, plus the magnitude and direction  of its motion

Explanation:

Momentum is defined as the product of mass by velocity, in the international system of measurements (SI) momentum has the following Units [kg*m/s].

P = m*v

where:

P = momentum Lineal [kg*m/s]

m = mass [kg]

v = velocity [m/s]

Therefore the answer is A) How much matter an object has, plus the magnitude and direction  of its motion

Answer:

A is correct

Explanation:

A P E X

What one would notice from the picture depend on the view point and the perspective of the person because different people looking at this elephant would notice a different thing according to their perception.

Perspective refers to how one views things. It is a method of art that modifies the size or depth of an item on paper. Farm owners' perspectives on a shortage of rain are an illustration of perception. In a picture, the train tracks appear to curve into the horizon as an illustration of perspectives.

For the person looking from the front elephant's teeth would appear like a spear, for the person looking at its leg would imagine a tree , for the person on the ladder the big structure of the elephant would appear like a wall,the person looking from the back on its tail would imagine it as a rope.

Thus, perspective is very crucial when we are looking at different things from different angles.

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