20 points please helppp me I’m begging u this is due soon please come on ????? Anyone

Answer:

I believe it is 16

Explanation:

Answer:so add the momentum twice and then the kinetic energy becomes four times

Explanation:This includes to me not the factor but by what factor it’s kenetic energy changes Momentum becomes twice and kinetic energy becomes four times its original value

Answer:

The change in the object's velocity is 6.25 m/s

Explanation:

Force

According to the second Newton's law, the net force exerted by an external agent on an object of mass m is:

F = ma      [1]

Where a is the acceleration of the object.

On the other hand, the equations of the Kinematics describe the motion of the object by the equation:

[tex]v_f=v_o+at\qquad\qquad[2][/tex]

Where:

vf is the final speed

vo is the initial speed

a is the acceleration

t is the time

It's given a constant force of F=4.5 N acts on an object of mass m=7.2 kg. The object has an acceleration we can calculate solving [1] for a:

[tex]a=\frac{F}{m}[/tex]

[tex]a=\frac{4.5}{7.2}=0.625[/tex]

[tex]a=0.625\ m/s^2[/tex]

It's required con compute the change of velocity (or its magnitude, the speed). From [2]:

[tex]v_f-v_o=at[/tex]

The expression at the left side is the change of speed Δv:

[tex]\Delta v=at[/tex]

Knowing the time is t=10 s:

[tex]\Delta v=0.625*10[/tex]

[tex]\Delta v=6.25\ m/s[/tex]

The change in the object's velocity is 6.25 m/s

Answer:

The answer would be no

Explanation:

because the voltages are so high, we can assume that 5 appliances divided up between the voltages would not be safe to use together and would ultimately cause the circuits to overload

Answer:

The maximum magnitude of their resultant is 14 units, and the minimum is 2 units

Explanation:

Resultant Vectors

When two or more vectors are added or subtracted, the resultant vector can be found by considering their magnitudes and directions.

Two vectors applied to the same point can produce a result that can vary from being completely collaborative or completely opposite.

If two vectors act in a collaborative form, their magnitudes are added and the result has the maximum possible magnitude. If they act in opposite directions, the result has the minimum possible magnitude.

Thus, being 6 and 8 units the magnitudes of the vectors, the maximum magnitude of their resultant is 14 units, and the minimum is 2 units.

Answer:

mechanical energyis the sum of all potential and kinetic energy.hope it helps!

Explanation:

Electromagnetic waves are different from sound or water waves in such a way that water and sound waves are called mechanical waves that requires a material medium for their propagation.

Electromagnetic waves do no require a material medium for propagation.

Answer:

B

In my opinion. :)

Explanation:

Answer:

Efficiency = 5%

Explanation:

Given that,

Supplies energy to the bulb = 100 J

Transferred energy by the bulb = 5 J

We need to find the efficiency of the bulb. It can be given by "

[tex]\eta=\dfrac{\text{useful energy out}}{\text{useful energy in}}\times 100\\\\=\dfrac{5}{100}\times 100\\\\=5\%[/tex]

So, the efficiency of the bulb is 5%.

The velocity vector is always perpendicular to the radius. By radius, I mean the inward centripetal force that pulls the object to continue on its curved path. Without this inward force, the object would continue on a straight path tangential to the curve it was previously on.

Answer:

c

Explanation:

Answer:C&D

Explanation:

I just did it

I dont see a mark where it is, if there was a line it would be marking the constant speed of it. There is just time(s) which probably stands for speed, and position(m) which probably stands for miles. There is a measurement of 50, down to 10. Please give me more explanation to this question and I may be able to help!

Answer:

6km

Explanation:

Answer:

36.0 m/s^2

Explanation:

The magnitude of your acceleration is equal to 36.0 [tex]m/s^2[/tex].

Given the following data:

To calculate the magnitude of your acceleration:

Mathematically, the centripetal acceleration of an object is given by this formula:

[tex]A_c = \frac{V^2}{r}[/tex]

Where:

Substituting the given parameters into the formula, we have;

[tex]A_c = \frac{30.0^2}{25.0}\\\\A_c = \frac{900}{25.0}[/tex]

Centripetal acceleration = 36.0 [tex]m/s^2[/tex]

Read more on centripetal acceleration here: https://brainly.com/question/2788500

it increase it momentum

Explanation:

The density of a solid copper is 8960kg/m^3 while the density of a molten copper is 7900kg/m^3 this is due to the difference in the state of matter, the solid copper is in solid state while the molten copper is in form of a liquid. In the solid copper atoms are tightly pack while they atom are not tightly packed.

Answer:

no i dont think so

Explanation:

Answer:

11 times

Explanatiom:

756 fourty

Answer:

friction

Explanation:

have you not heard frictional force?

have you ever heard momentum force or acceleration force

hope this helps. if not. please report it and let someone else try it

Answer:

b) v

Explanation:

the distance between pole and position of image can denoted by v

Answer:

y = 3.26 [m]

Explanation:

In order to solve this problem, we must use the following equation of kinematics.

[tex]v_{f}^{2}= v_{o}^{2}-2*g*y[/tex]

where:

Vf = final velocity = 0

Vo = initial velocity = 8 [m/s]

g = gravity acceleration = 9.81 [m/s²]

y = elevation [m]

Note: The negative sign in the equation above represents that the movement is againts the direction of the gravity acceleration.

Now replacing:

[tex]0=8^{2} -2*9.81*y\\19.62*y=64\\y=3.26 [m][/tex]

Answer:

P= 1.04651 g/cm3

Explanation:

Answer:

P = 0.2 W

Explanation:

Given that,

Force, F = 4 N

Displacement, d = 1 m (say)

Time, t = 20 s

We need to find the power output. Power is the rate of doing work. So,

P = W/t

[tex]P=\dfrac{Fd}{t}\\\\P=\dfrac{4\times 1}{20}\\\\P=0.2\ W[/tex]

So, the required power is 0.2 W.

Explanation:

atommmmmmmmmmmmmmmmmmmmm

Answer:

It is B

Explanation:

Answer:

the other guy is right im answering so you can give him brainliest have a nice day :)

Explanation:

Answer:

yes, They will be able to move the dresser.

Explanation:

sliding force 90N

55N + 38N = 93N

therefore, yes the twins can move the dresser

This is an incomplete question, the complete question is given below.

Drag the tiles to the correct boxes to complete the pairs. Not all tiles will be used.  Match the reactants with the products.

copper sulfate + oxygen

copper oxide

zinc sulfate + copper

aluminum chloride + copper

copper + water

copper sulfate + zinc  →

aluminum + copper chloride  →

copper oxide + hydrogen  →

copper + oxygen  →

Answer :

Copper sulfate + Zinc → Zinc sulfate + copper

Aluminium + Copper chloride → Aluminium chloride + copper

Copper oxide + Hydrogen → Copper + Water

Copper + Oxygen → Copper oxide

Explanation :

As we know that chemical reaction is a reaction in which two or more than two substances or reactants are reacted to give two or more than two different products.

According to the question:

This reaction is a single replacement reaction in which zinc is more reactive than copper and zinc displaces copper from its salt to give products.

This reaction is a single replacement reaction in which aluminium is a more reactive element than copper and aluminium displaces copper from its salt to give products.

This reaction is a single replacement reaction in which hydrogen displaces less reactive metals from their oxide to form water and the metal.

This reaction is a synthesis reaction in which two different atoms or molecules combine to form single compound.

Answer:

Copper sulfate + Zinc → Zinc sulfate + copper

Aluminium + Copper chloride → Aluminium chloride + copper

Copper oxide + Hydrogen → Copper + Water

Copper + Oxygen → Copper oxide

Explanation:

guy above me

Answer:

Frequency and tfcvvbyfgffhhi

Answer:

I think frequency

Explanation:

Answer:

Centripetal acceleration = 8m/s²

Explanation:

Given the following data;

Radius, r = 50m

Velocity, v = 20m/s

To find centripetal acceleration;

Centripetal acceleration = v²/r

Centripetal acceleration = 20²/50

Centripetal acceleration = 400/50

Centripetal acceleration = 8m/s²

Therefore, the centripetal acceleration of Zach's car is 8 meters per seconds square.

Answer:

what is the force of gravitational attraction between an object with a mass of 100 kg and another object that has a mass of 300 kg are at a distance of 2m apart