6. A 2.2 kg rock rests on the edge of a bridge that is 3.3 m above a river. What is the
gravitational potential energy of the rock when measured from the surface of the
river? What is the gravitational potential energy when measured from the edge of
the bridge?​

Answer:

a=1 m/s^2

Explanation:

[tex]a = \frac{v - u}{t} \\ = \frac{10 - 0}{10} \\ = 1m {s}^{ - 2} [/tex]

Hey!!

Solution,

Initial velocity(u)=0 m/s

Final velocity(v)=10m/s

Time(t)=10s

Acceleration=?

Now,

Acceleration=v-u/t

=10-0/10

= 10/10

=1 m/s^2

The acceleration is 1 m/s^2

Hope it helps

Good luck on your assignment

Answer:

are in equal size or act in same direction

Balanced forces are the forces which are equal in size. Balanced force has a net force which is equal to zero, and these do not cause a change in motion. Thus, the correct option is C.

Balanced forces are those which are opposite in direction and equal in the size. Balanced forces are considered to be in the state of equilibrium. When the forces are balanced and there is no change in direction. Combined forces which are balanced are always equal to zero. These forces are equal and hence do not cause any change in the motion of an object.

Examples of balanced forces include resting against a wall, lying down, aircraft in a steady-flight, floating in water, and standing in the ground.

Therefore, the correct option is C.

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Answer:

due to the presence of fee electrons.

Explanation:

these electrons conduct electric current.

Conductivity in metallic solids is due to the presence of free electron. No of the electron will decide the flow of the electric current.

When the matter is put in an electromagnetic field, it has an electric charge, which causes it to experience a force. A positive or negative electric charge can exist.

Charges that are similar repel each other, whereas charges that are dissimilar attract each other. The term “neutral” refers to an item that has no net charge.

A valence electron is an electron in the outermost shell. Hence, associated with an atom that can experience the innovation of a chemical bond if the outer shell is not closed.

Conductivity in metallic solids is due to the presence of free electron.

Hence, electron is the correct answer for blank.

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Answer:

Rutherford and atomic model are correctly matched.

Answer:

Schrödinger - electron cloud surrounds nucleus. Hope this helps.Explanation:

Answer:

it is a mass of an object that increases to a kinetic energy.

Explanation:

Answer:

[tex]k=0J[/tex]

Explanation:

Kinetic Energy formula:

[tex]K=\frac{1}{2} (m)(v^2)[/tex]

The rocks suspended 320 m above ground. The rock is not in motion. The speed of the rock is zero.

Using the formula:

[tex]K=\frac{1}{2} (m)(0^2)[/tex]

[tex]K=0J[/tex]

Answer:

It is 52° below the celestial equator.

Explanation:

The declination is the angle in degrees measured north (+) or south (-) of the an imaginary line called the celestial equator.

The celestial equator is a projection of the earth's equator on the celestial sphere. imaginary

The star named Canopus has a declination of approximately –52°.

Since the angle is negative, this shows that it is south or below the celestial equator and at 52° south of the celestial equator.

Thus, the star named Caponus is 52° below the celestial equator.

Answer:

the answer is 'it is 52° below the celestial equator.' :))

Explanation:

its the correct answer on the quizz,,, good luck!! :3

Answer:

repel , attract,l am sure with these two blanks only

Answer:

Magnetic fields

A magnet creates a magnetic field around it. You cannot see a magnetic field, but you can observe its effects. A force is exerted on a magnetic material brought into a magnetic field. The force is a non-contact force because the magnet and the material do not have to touch each other.

Answer:

Acceleration = 0

Explanation:

Uniform Velocity = 1.5m/s

Acceleration is defined as the change in Velocity of a moving object with time.

Acceleration = (V2 - V1) / t

Where v2 and V1 are velocities and t is time

A body is said to be moving at a uniform Velocity if the Velocity with which it moves is constant. That is there is no change in the Velocity as the body progresses

Mathematically ;

(V2 - V1) = 0 [uniform / constant Velocity]

acceleration = 0 / time

Acceleration = 0

Answer: 10m/s^2

Explanation:

Given the following :

Initial Velocity(U) = 10m/s

Angle of inclination = 30°

In other to calculate the magnitude of the vector,

We need to resolve into verti AL and horizontal component.

Vertical component of a vector(Uy) = U × Sinθ

Horizontal component(Ux) = U × Cosθ

Uy = 10 × sin30 = 10 × 0.5 = 5m/s

Ux = 10 × Cos30 = 10 × 0.866 = 8.66m/s

Therefore the magnitude equals :

U = √(Uy)^2 + (Ux)^2

U = √5^2 + 8.66^2

U = √25 + 74.9956

U = √99.9956

U = 9.9997799

U = 10m/s^2

Answer:

Bottle opener works on a fulcrum.

Explanation:

A bottle opener is a second-class lever because the pivot point is at one end of the opener and the load is in the middle.

Answer:

Explanation:

Question 1:

Given;

a counterweight of mass, m = 2-kg

distance moved by this weight, d = 0.5 meters

the gravitational force of the counterweight is calculated as;

F = mg

where;

F is gravitational force

m is the mass

g is acceleration due to gravity

F = 2 x 9.8 = 19.6 N

Thus, the gravitational force of the counterweight is 19.6 N

Question 2:

Given;

a counterweight of mass, m = 2-kg

height moved by this weight, h = 0.5 meters

the work done is calculated as;

Work done = Force x distance moved by this weight

Work done = 19.6 x 0.5 = 9.8 J

Thus, the work done is 9.8 J

Answer:20 miles

Explanation:

Answer:

The net force of engine on total mass of train is 35000 N

The net acceleration is 1.944 m/s²

I

Answer:

It is a superordinate goal because both teams could have helped with the task.

Explanation:

If both teams pushed then they could have made it happened

Answer:

friction

Explanation:

The property of matter that resists changes in motion is called friction. Details about friction can be found below.

Friction is a force that resists the relative motion of two bodies in contact.

Friction is a resisting force that is experienced when two bodies are moving over one another, hence, is said to resist changes in motion. Examples of cases of friction are as follows:

Therefore, the property of matter that resists changes in motion is called friction.

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Answer:

C

Explanation:

A closed system does not allow transfer of matter in or out of the system

Answer:

v_avg = 4 m/s

Explanation:

The average velocity of the car is given by the distance traveled by the car, in a specific time.

The total distance is 20m, because the car moved to the reference point (10m), and then moves to 10m to the south. THe total distance is 20m.

Then, you use the following formula:

[tex]v_{avg}=\frac{x_t}{t}[/tex]

x_t: total distance traveled by the car =  20m

t: time in which the car made the trajectory =  5s

You replace the values of x_t and t:

[tex]v_{avg}=\frac{20m}{5s}=4\frac{m}{s}[/tex]

hence, the average velocity is 4m/s

Answer:

Explanation:

Magnetic field due to current carrying wire at a distance r from the  wire is

[tex]B=\frac{\mu_0I}{2r}---(1)[/tex]

In our case

[tex]I=\frac{I_0}{2}[/tex]

where,

I₀ = max current or peak current

and r = h (where h is the height of power line)

[tex]\therefore B=\frac{\mu (I_0/2)}{2h} \\\\=\frac{\mu_0 I_0}{4h} ----(2)[/tex]

put

h ≈ 370m

I₀ ≈ 3KA

[tex]B= \frac{(1.26*10^-^6)(3*10^3)}{4*(370)} \\\\=2.5*10^-^6 T[/tex]

Answer:

I know 1, that is in the case of a burning of a candle.

Explanation:

Answer:

-0.375 m/s2

Explanation:

To find the acceleration due to gravity in this planet, we can use the Torricelli formula of UALM (uniformly accelerated linear motion):

V^2 = Vo^2 + 2*a*S

Where V is the final velocity, Vo is the inicial velocity, a is the acceleration and S is the total displacement.

With V = 3, Vo = 0 and S = -12, we have:

3^2 = 0^2 - 2*a*12

24a = -9

a = -9/24 = -0.375 m/s2

Answer:

150N

Explanation:

formula= pressure= force/area

300pa= x/0.5

300*0.5= x

150N= x

force= 150N

Answer:

Density equals mass over volume so 2 divided 500

Answer:

it's Louis pastuer

Explanation:

...

Answer:

[tex]Ebp=9J[/tex]

Explanation:

Potential energy:

[tex]Ep=mgh[/tex]

m - mass

h - altitude = 20cm = 0.2 m

[tex]Epa=12=0.2(mg)[/tex]

Thus:

[tex]mg=\frac{12}{0.2}[/tex]

[tex]mg=60n[/tex]

In Point B:

[tex]Epb=mg(0.15)[/tex]

[tex]Epb=60(0.15)[/tex]

[tex]Epb=9J[/tex]

Answer:

On the other hand, Florida's Gulf Coast experiences the greatest number of thunderstorms out of any U.S. location. These types of storms occur on average 130 days per year in Florida.

I was confused with the question so, the following are the two answers. You can take whichever u want to. :)

Explanation:

If the qn is Rearrange to make it right, then the answer is: The 6 million degrees energy is stored in the sun.

Or if the question is Correct the sentence, then the answer will be: The energy stored in the sun is solar energy.

Explanation:

It is given that, a robot starts from a certain point and moves east for a distance of 5.0 meters, then goes north for 3.0 meters, and then turns west for 2.0 meters.

Let east is +x, west is -x north is +y.

When it moves east for a distance of 5.0 meters, it means (5,0)

When it goes north for 3.0 meters, and then turns west for 2.0 meters, it means (0,3) +(-2,0)

(a) x-y coordinates for the resultant vector is (3,3)

(b) The magnitude of the resultant vector for the robot is given by :

[tex]R=\sqrt{3^2+3^2} \\\\R=4.24\ m[/tex]

Answer:

when the ball is bounced gravitationally energy is released (more info below)

Explanation:

When a force is applied down to the ball, the gravitational potential energy is converted into kinetic energy before it hits the earth. Cinetic energy is converted into vibration, thermal, and static electrical energy, before the momentum of the ball pushes the ball back up into the hands of the people.

hope this helped!

The description of the mechanical energy and the thermal energy at the time when the ball should be bounded at the time when there is the realization of the gravitational energy.

At the time when the force is applied down to the ball so here the gravitational potential energy should be transformed into kinetic energy prior at the time when it should be hit to the earth. Kinetic energy should be transformed into vibration, thermal, and static electrical energy prior to the momentum of the ball that pushed the ball back up the hands of the people.

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Answer:

41 miles

Explanation:

Also, the straight line distance from your starting point is technically called your displacement.

Answer:

3.4 s is the correct answer to the given question .

Explanation:

As Given in the question

Vox=310 m/s

Voy=26 m/s.

As we know that

[tex]v_{y} ^{2}= v_{ay} ^{2}\ +2gh[/tex]--------------eq(1)

As the velocity at the maximum height =0

Putting the value of [tex]v_{y} ^{2} \ = \ 0[/tex] in the equation(1) we get

[tex]v_{ay} ^{2}\ +\ 2gh\ = 0\\ h=\frac{ -v_{ay} ^{2}}{2g}[/tex]

Putting the value [tex]v_{ay} ^{2}\[/tex] in the previous equation we get

[tex]\frac{\ (-26 m/s\ )^{2} }{\ (2*\ -9.8\ )}\\ =\frac{676}{19.6}\\ =34.4\ m/s\\=3.4 s[/tex]

Therefore h=3.4 s