helppp pls A rock rests on the ground. A force pulls the rock toward the earth, and another force pulls the rock toward the moon.

Why does the rock stay on the ground?


A. The force pulling the rock toward the earth is weaker than the force pulling the rock toward the moon.

B. The rock is moving, but it's not visible to the human eye.

C. Only one force can act on an object at one time.

D. The force pulling the rock toward the earth is greater than the force pulling the rock toward the moon.

Answer:

It's called, "Cytopathic effects."

Answer:

b

Explanation:

Answer:

A (Crystallization of fish sauce)

Explanation for Answer:

The answer is A because the fish sauce is changing physical forms; it goes from being a liquid to a crystalized solid.

More Explanation on Physcal Changes:

Physical changes are changes affecting the form of a chemical substance, but not its chemical composition. Physical changes are used to separate mixtures into their component compounds, but can not usually be used to separate compounds into chemical elements or simpler compounds.

Have a great day! :D

Answer:

distance of compression: 0.07071 m

Explanation:

\(\sf energy = \dfrac{1}{2} kx^2\)

\(\rightarrow \sf 0.5= \dfrac{1}{2} (200)x^2\)

\(\rightarrow \sf 0.5= (100)x^2\)

\(\rightarrow \sf 5\ *\ 10^{-3}= x^2\)

\(\rightarrow \sf x = \sqrt{5\ *\ 10^{-3}}\)

\(\rightarrow \sf x =0.07071 \ m\)

Answer:

Explanation:

Remark

In general, these 3rd class levers are very inefficient. Because the force distance is smaller than the load distance, you need to pull upward with more force that the weight of the load. So whatever the load is, the force is going to be much greater.

The distances are always measured to the pivot unless you are asked something specific otherwise.

Givens

F = ?

weight = 6N

Force Distance = F*d = 0.5 m

Weight Distance =W*d1 = 2 m

Formula

F*Fd = W*Wd

Solution

F*0.5 = 6 * 2            Divide by 0.5

F = 12/0.5

F = 24 N upwards

2.6×10\(^-8\) Ωm,A long, flat wire is used as a rear window defroster and is bonded to the window's interior surface.

Electrical resistivity is a measurement of a material's degree of resistance to current flow. The SI unit for electrical resistivity is the ohm meter (m). It is frequently represented by the Greek letter rho. Materials that easily transmit current and have a low resistance are called conductors.

Length of the wire, l = 12.2 m

width of the wire, w = 1.8 mm

Thickness of the wire, T = 0.11 mm

Potential difference of the battery, v = 12 V

Current in battery, I = 7.5 A

Ohms law says, V = IR.

So that, R = V/I

R = 12/7.5 = 1.6 Ω

The Greek letter rho is frequently used to represent resistance, which is numerically equivalent to the resistance R of a wire-like specimen, multiplied by its cross-sectional area A, and divided by its length.

Resistivity if a material is:

ρ = RA/l

ρ = [1.6 × 1.8 × 10\(^-3\) × 0.11×10\(^-3\)] / 12.2

ρ = (3.168×10\(^-7\)) / 12.2

ρ = 2.596×10\(^-8\)

Therefore, the resistivity of the wire is 2.60×10\(^-8\) Ωm

Resistivity of the wire is 2.60*10^-8 Ωm

Given:

Length of the wire, I = 12.2 m

width of the wire, w = 1.8 mm

thickness of the wire, T = 0.11 mm

Potential difference of the battery, v = 12

Current in the battery, I = 7.5 A

To Find:

Resistivity

Solution: A characteristic property of each material, resistivity is useful in comparing various materials on the basis of their ability to conduct electric currents.

Remember, Ohms law says, V = IR

So that, RV/I

R = 12/7.5= 1.6 Q

Resistivity if a material is

p = RA/I

p = [1.6 * 1.8*10^-3* 0.11*10^-3] / 12.2

p = (3.168*10^-7)/12.2

p = 2.596*10^-8

Therefore, the resistivity of the wire is 2.60*10^-8 Ωm

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Answer:

The output work is always less than the input work because some of the input work is used to overcome friction. Therefore, the efficiency is always less than 100 percent.

The  is that the velocity of water flow in the pipe on the second floor is 13.6 m/s.

To calculate the velocity of water flow on the second floor, we can use Bernoulli’s principle which states that the pressure and speed of a fluid are inversely proportional to each other. Pressure + (1/2) * Density * Velocity^2 + Density * g * Height

= Constant (where g = acceleration due to gravity)In this problem, since the pressure remains unchanged, we can eliminate the first term on both sides of the equation for both positions. Using Bernoulli’s principle for position 1 and 2 as:

(1/2) * Density * Velocity1^2 + Density * g * H1 = ConstantPosition 2:

(1/2) * Density * Velocity2^2 + Density * g * H2

= ConstantConstant

= (1/2) * Density * Velocity1^2 + Density * g *

H1Taking the difference of the above equations we get:1/2 * ρ * (V2^2 - V1^2)

= -ρghV2^2 - V1^2

= -2ghV2^2 = V1^2 - 2ghV2

= √(V1^2 - 2gh)

The negative sign is ignored as it represents the direction of flow. Putting the values we get:

V2 = √(15^2 - 2 × 9.81 × 3)

= 13.6 m/s

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Answer:

Compound

Explanation:

Answer:

LOL i belive its 200 because i did this exact same thing yesterday for homework and got it right

Explanation:

my brain, and my memory allowed me to remeber this from my homework.

The Forces between the masses will be doubled and it will be 200N.

Using the Newton law of gravitation force,

The force of attraction between 2 objects is directly proportional to the product of their masses and inversely proportional to the square of their distance apart. Therefore,

F = G m₁ m₂ / r²

The Force of attraction was 100N . After doubling the mass of the smaller sphere the force between them will be as follows:

F = G m₁ 2m₂ / r²

100 N  =   G m₁ m₂ / r²

200N =  2 G m₁ m₂ / r²

Therefore, the Force between the masses will be doubled . The new force of attraction will be 200N.  Since Force of attraction is directly proportional to the product of their masses the force should increase as the product of there masses increase.

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What lightning has in common with the shock you receive when you touch a doorknob is that both phenomena involve the transfer of electric charges between two objects or areas with different electrical potentials. This process is known as electrostatic discharge (ESD).

1. Formation of electric charge: In both cases, there is a buildup of electric charges due to friction or other processes. With lightning, this occurs within clouds, where ice particles collide and generate static electricity. In the case of the doorknob shock, static electricity builds up on your body as you walk across a carpet, for example.

2. Difference in electric potential: Once there is a significant charge buildup, there is a difference in electric potential between the charged object and another object or area with an opposite charge.

For lightning, this difference occurs between the cloud and the ground, while for the doorknob shock, it occurs between your body and the metal doorknob.

3. Discharge: When the electric potential difference is large enough, a sudden and rapid discharge of the built-up charges takes place. This results in the visible lightning bolt or the spark and shock experienced when touching the doorknob.

4. Release of energy: In both cases, the discharge of electric charges releases energy in the form of light, heat, and sound. This energy release is what causes the bright flash of lightning and the audible snap of a doorknob shock.

In summary, lightning and the shock you receive when touching a doorknob are similar because they both involve the buildup and discharge of electric charges between objects or areas with different electrical potentials, ultimately releasing energy in the process.

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A gymnast, who jumps upward with an initial speed of 10 m/s, is in the air for a total time of C. 2 seconds.

Consider the factors affecting the gymnast's motion, which are initial speed, gravity, and time. When the gymnast jumps, she experiences Earth's gravity, which causes a downward acceleration of approximately 9.8 m/s². We can use the formula t = (2*v₀) / g to find the total time in the air, where t is the total time, v₀ is the initial speed, and g is the acceleration due to gravity.

Plugging in the given values, we get t = (2*10 m/s) / 9.8 m/s² ≈ 2.04 seconds. Since the available choices are in whole numbers, we can round this value to the nearest second, which is 2 seconds. So, the gymnast is in the air for a total time of 2 seconds (C).

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Answer:

mm yummy

Explanation:

Answer: freezing: the process by which a liquid becomes a solid

boiling: the process by which a solid becomes  a liquid

evaporation: vaporization that occurs below the surface of a liquid

sublimation: the process by which a solid becomes  a gas

melting:  the process by which a solid becomes  a liquid

Explanation:

Freezing can be defined as the change of a matter from liquid to a solid state.

Boiling can be defined as the change of matter solid to a liquid due to the application of heat energy.

Evaporation can be defined as the change in which a liquid is changed to gas when heat is applied on the liquid.

Sublimation can be defined as a change of a solid directly into gas without solid being changed into liquid because the solid particles gain enough energy to be changed into gas.

Melting can be defined as the change in the solid form into liquid form.

Answer:evaporation: vaporization that occurs at the surface of a liquid

Melting: the process by which a solid becomes a liquid

Boiling: vaporization that occurs below the surface of a liquid

Freezing: the process by which a liquid becomes a solid

Sublimation: the process by which a solid becomes a gas

Explanation:

The difference in tension in terms of m and g is given by T_b - T_t = 2mg

To find the difference in tension T_b - T_t, we will first analyze the forces acting on the ball at the top and bottom of the circle and then compare the magnitudes.
1. At the top of the circle:
- The tension force T_t is acting downward.
- The gravitational force mg is also acting downward.
The net force at the top is the sum of these forces:
F_t = T_t + mg
2. At the bottom of the circle:
- The tension force T_b is acting upward.
- The gravitational force mg is acting downward.
The net force at the bottom is the difference of these forces:
F_b = T_b - mg
Since the total mechanical energy is conserved, we can equate the centripetal forces acting on the ball at the top and bottom of the circle:
\(m(v_t^2) / L = m(v_b^2) / L\)
As we can see, the mass m and length L cancel out:
\(v_t^2 = v_b^2\)
Now we can relate the forces to the centripetal acceleration:
At the top: \(F_t = m(v_t^2) / L\)
At the bottom: \(F_b = m(v_b^2) / L\)Substituting the expressions for F_t and F_b, we get:
\(T_t + mg = m(v_t^2) / L\)
\(T_b - mg = m(v_b^2) / L\)
Since \(v_t^2 = v_b^2\), we can set the centripetal forces equal to each other:
m(v_t^2) / L = m(v_b^2) / L
Now subtract the equation for the forces at the top from the equation for the forces at the bottom:
(T_b - mg) - (T_t + mg) = 0
Simplifying the equation, we get:
T_b - T_t = 2mg
So, the difference between the magnitude of the tension in the string at the bottom relative to that at the top of the circle is 2mg.

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When two atomic nuclei come together to form a new species of atom, the force that must be overcome is known as the Coulomb force or the electrostatic force.

The Coulomb force is the attractive force between two charged particles, which is given by the Coulomb's law. The Coulomb force (also known as electrostatic force) is an electric force that occurs between charged particles (or objects). Coulomb's law mathematically describes how much force is between two charged objects. The Coulomb force is responsible for holding electrons around the nucleus. Additionally, Coulomb's law states that the force of attraction or repulsion is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.

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The overall charge of an object that has 82 protons, 82 neutrons, and 109 electrons is -27. Details about charge can be found below.

The overall charge of an atom can be calculated by subtracting the number of electrons from the number of protons.

The proton number represents the number of positively charged atom while the electron number represents the number of negatively charged atom.

According to this question, a charged object has 82 protons, 82 neutrons, and 109 electrons. The overall charge of the atom is calculated as follows:

Overall charge = 82 - 109

Charge = -27

Therefore, the overall charge of an object that has 82 protons, 82 neutrons, and 109 electrons is -27.

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The initial temperature of the water, the heat source, and the volume of water being boiled are some of the variables that affect how long it takes to boil water.

4.18 J/g/°C is the specific heat capacity of water. What we are interested in is the quantity of heat, or Q. To do this, we would apply the formula Q = m•C•T. The m, C, and T can be calculated using the initial and final temperatures.

How much heat is gained or lost by a sample can be calculated using the equation q = mcT, where m is the mass of the sample, c is the T represents the change in temperature, while S is specific heat (q).

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The multiple of Earth's radius RE that the projectile reaches depends on its initial speed and kinetic energy


(a) If the initial speed of the projectile is 0.687 of the escape speed from Earth, then its initial speed can be calculated as:

v = 0.687 * sqrt(2GM/R)

where v is the initial speed, G is the gravitational constant, M is the mass of the Earth, and R is the radius of the Earth.

To find the radial distance that the projectile reaches, we can use the equation for the height of a projectile:

h = R + v^2/2g

where h is the height, v is the initial speed, and g is the acceleration due to gravity.

Since we want to find the multiple of Earth's radius RE, we can express the height in terms of RE:

h/RE = (R/RE) + (v^2/2g) * (1/RE)

Substituting the value of v and simplifying, we get:

h/RE = 1.374

Therefore, the projectile reaches a height that is 1.374 times the radius of the Earth.

(b) If the initial kinetic energy of the projectile is 0.687 of the kinetic energy required to escape Earth, then its initial speed can be calculated as:

v = sqrt(2KE/m)

where KE is the initial kinetic energy and m is the mass of the projectile.

To find the radial distance that the projectile reaches, we can use the same equation as in part (a):

h = R + v^2/2g

Substituting the value of v and simplifying, we get:

h/RE = sqrt(2KE/GM) / RE

Since KE is 0.687 of the kinetic energy required to escape Earth, we can write:

KE = 0.687 * (GMm/R)

Substituting this value and simplifying, we get:

h/RE = 1.333

Therefore, the projectile reaches a height that is 1.333 times the radius of the Earth.

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Answer:

3.125×10²¹ N/C

Explanation:

Electric Field: This can be defined as the force experienced per unit charge. The S.I unit of electric Field is N/C

Applying,

E = F/q.................. Equation 1

Where E = Electric Field, F = Force experienced, q = Charge of an electron.

From the question,

Given: F = 500 N, q = 1.6×10⁻¹⁹ C

Substitute these values into equation 1

E = 500/(1.6×10⁻¹⁹)

E = 312.5×10¹⁹

E = 3.125×10²¹ N/C

Answer:

I believe D on edge

Explanation:

The  statement  she should place in the region marked X is the objects have the same charge.

A Venn diagram is a diagram that is composed of a square in which circles are inscribed. It can be used to easily represent information.

From the Venn diagram shown, the  statement  she should place in the region marked X is the objects have the same charge. This is because, the region marked x in the Venn diagram shows the intersection which can not be oppositely charged or objects that do not touch.

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The final velocity of the glider a after the elastic collision is 2m/s.

The velocity of the glider after the collision is given by the standard formula,

V'₁ = (M₁ - M₂)V₂/(M₁ + M₂) + 2M₂V₂/(M₁ + M₂)

Where,

V'₁ = velocity of the glider a after collision,

M₁ is the mass of glider a which is 0.25 kg,

M₂ is the mass of glider b which is 0.4 kg,

V₁ and V₂ is the velocity of glider before collision of glider a and b which is given to be 2m/s.

So, putting the values,

V'₁ = (0.25-0.4)2/0.65 + 1.6/0.65

V'₂ = 1.3/0.65

V'₂ = 2m/s.

The velocity after collision came to be the same as before of the collision, this means that the glider a rebound with the same velocity.

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Answer: Most likely purple

Explanation:

Answer:

Purple?

Explanation:

I'm confused what you are asking.

Answer:

The velocity of the cricket ball is 17.32 m/s

Time is taken by the ball to reach the highest point = 0.8660 seconds

Explanation:

The cricket ball can be seen and treated as a projectile in this case

The maximum height attained by a projectile in motion can be calculated using the formula:

\(h = \frac{v^2 sin^2 \theta }{2g}\)

In any projectile problem, once we know see that the object was released vertically upwards, we need to know that this means that the angle of projection is 90 degrees, and sin 90 is = 1

hence, h will be modified to become

\(h = \frac{v^2 }{2g}\)

\(v = \sqrt{2gh}\)

We are given that h = 15m and g = 10m/s2

\(v = \sqrt{2 \times 10 \times 15} = 17.32m/s\)

The velocity of the cricket ball is 17.32 m/s

B. We can get the time it took to reach the highest point by dividing

time = distance/speed

Time = 15/17.32 = 0.8660 seconds

Answer:

Explanation:

It transfers from mechanical energy, to electrical energy to chemical energy. The energy transformation in an electromagnet is from chemical to electrical to electromagnetic waves. The north poles of two different magnets will attract each other.

The electric field strength at the point midway between the charges of an electric dipole is 0 N/C.

An electric dipole consists of two equal but opposite point charges, in this case, each having a magnitude of 4.0 nC and separated by a distance of 2.0 cm.

When we want to determine the electric field strength at the midpoint between these charges, we need to consider the individual electric fields created by each charge and their directions.
At the midpoint, the electric fields due to each charge are equal in magnitude but opposite in direction. This is because the distance from each charge to the midpoint is the same, and the charges have the same magnitude but opposite signs. Therefore, the electric fields will cancel each other out.
In an electric dipole with charges of equal magnitude but opposite signs, the electric field strength at the point midway between the charges is 0 N/C, as the electric fields created by each charge cancel each other out.

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Given what we know, as with all substances, the particles in the bowl of hot soup will slow down as they cool after being poured.

Therefore, the motion of the particles of the soup decrease or slows down as the soup cools due to the loss of energy they are experiencing. The soup radiates heat energy into the room or plate, causing the particles to lose energy and slow down.

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Answer:

To calculate the average acceleration of the particle, we use the formula a = (vf - vi)/t, where vf is the final velocity, vi is the initial velocity, and t is the time interval. In this case, a = (18.0 m/s - 29.0 m/s)/11.5 s = -2.3 m/s2. Therefore, the average acceleration of the particle is -2.3 m/s2.

The vertical and horizontal parts of a projectile are perpendicular and independent of one another over a short distance.

Depending on the force imposed on it, horizontal motion is defined as a projectile motion in a horizontal plane. The vertical and horizontal parts of a projectile are perpendicular and independent of one another over a short distance.

Throughout the course of a projectile's flight, the horizontal component of its speed remains constant. This is because the projectile experiences no horizontal force after being launched. As a result, the projectile moves horizontally at a fixed speed.

The following equation is used to determine how far a bullet travels;

d = vt, where

t = Time

d = Distance

v = velocity

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