an object in freefall is accelerating downwards, so its velocity is continually increasing. because of this, its momentum is continually increasing as well, apparently contradicting the principle of conservation of momentum.

When the mirror is moved so that the tree is between the focus point F and the mirror, the image appears shorter and on the same side of the mirror.This happens because of the phenomenon known as Reflection of Light. The mirror reflects light in such a way that it appears as if the light is coming from behind the mirror.

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A compass works the way it does because Earth has a magnetic field that looks a lot like the one in a magnet.

The Earth's field is completely invisible, but it can be felt by a compass needle on the Earth's surface, and it reaches thousands of miles out into space.

Mathematically, the magnetic field is represented as a vector field. This vector field can be easily visualized as a collection of several vectors laid out in a grid. Each vector has a length based on the strength of the magnetic field and points in the same direction as a compass would.

This method is demonstrated by placing a grid of numerous small compasses in a magnetic field. The only distinction is that a compass does not reveal the strength of a field in this instance.

Therefore, A compass works the way it does because Earth has a magnetic field that looks a lot like the one in a magnet.

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The number of electrons in \(^{107}Ag_{47}\) is 47.

Thus, the correct answer is 47.

In an atom, the number of electrons is equal to the atomic number. The atomic number is represented by the subscript in the element's symbol. In this case, the subscript for Ag is 47, which means that there are 47 electrons in the atom. It is important to note that the number of protons is also equal to the atomic number, and the number of neutrons is equal to the atomic mass (represented by the superscript) minus the atomic number.

Therefore, the element Ag (Silver) has 47 electrons.

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Answer:

I believe D

Explanation:

Of course the manufacturer would most likely be biased to the product the have created, but the other sources would have no reason to. Hope this helps!

Explanation:

As a tornado or other storm system passes over a building, low pressure can tug a roof upward. When those forces surpass the force exerted by the weight of the roof, the structure flies up and is swept away by wind currents..

The electrical power supplied to the lamp is 100W when the p.d. across it is 24V and the current is 4.2 A.

Electrical power is the rate at which electrical work is done.

The unit of electrical power is Watts.

The experiment will require a 24V Battery, a Lamp marked 24V, 100 W, a key, wires, a rheostat, a voltmeter and an ammeter.

The circuit is completed and the rheostat is adjusted to provide until the voltmeter reads 24V.

The ammeter reading is taken as well.

When the voltmeter reading is 24V, it can be seen that' the ammeter reading for current is approximately 4.2 A.

Calculating, the power of the lamp:

Power = 24 × 4.2 = 100 W

Therefore, the electrical power supplied to the lamp is 100W when the p.d. across it is 24V and the current is 4.2 A.

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Answer:

Group 18

Explanation:

Answer:

gold

Explanation:

gold is shinny and solid can conduct ele tricity ,maleabl

Answer:

?

Explanation:

Answer:

spring force = -K × x , where X is elongation or compression in the spring. ( -) sigh shows that the spring force is opposite to the applied force to cause extension.

Potential energy = work done by spring force = integration of Force.

integrate the force (-K × x) over distance 0 to x .

U = 1/2 K × X^2 ( for elongation)

U = -1/2 × K × X^2 ( for compression)

Answer:

Because this pole is different from the original pole that magnetized the paperclips, the top paperclip will become demagnetized in the opposite direction and the bottom paperclip will be repelled away

Answer:

Net force

Explanation:

Bruh, easy question

The two equal-mass objects will stick together and move as one object after the completely inelastic collision.

In an inelastic collision, the two objects involved stick together and move as a single object after the collision. Since the objects have equal masses and are moving towards each other at equal speeds, their momenta will be equal and opposite before the collision.

During the collision, the objects come into contact and exert forces on each other. These internal forces cause the objects to deform and redistribute their velocities. However, due to the conservation of momentum, the total momentum before the collision must be equal to the total momentum after the collision.

Since the initial momenta of the objects are equal and opposite, the final momentum of the combined object will also be zero. This means the objects will stick together and move as one object after the collision, with a common velocity. This scenario is known as a completely inelastic collision.

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Therefore, the minimum uncertainty in the speed of the electron is approximately 1.44 x \(10^6\) m/s.

According to Heisenberg's uncertainty principle, the product of the uncertainties in the position (Δx) and momentum (Δp) of a particle must be greater than or equal to Planck's constant divided by 4π:

Δx Δp ≥ h/4π

Here h is the Planck's constant.

In this case, the electron is located on a pinpoint with a diameter of 2.5, which we can take as the uncertainty in its position:

Δx = 2.5 m

To find the minimum uncertainty in the speed of the electron, we need to relate momentum and speed. The momentum of an electron is given by:

p = mv

here m is the mass of the electron and v is its velocity. Therefore, the uncertainty in momentum can be related to the uncertainty in velocity as follows:

Δp = mΔv

where Δv is the uncertainty in velocity.

Substituting this relation into Heisenberg's uncertainty principle and solving for Δv, we get:

Δv ≥ h/4πmΔx

Substituting the known values for h, m (mass of electron), and Δx, we get:

Δv ≥ \((6.626 * 10^{-34} J s)/(4* pi * 9.109 * 10^-{31} kg * 2.5 m)\)

Simplifying this expression, we get:

Δv ≥ 1.44 x  \(10^6\)  m/s

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According to the question the net force on particle q1 is \(1.45 * 10^-4 N.\)

Force is an influence that produces a change in the motion, direction, shape, or orientation of an object. It is a vector quantity, meaning it has both magnitude and direction. Force can be derived from different sources, including physical contact, gravity, magnetism, or even electrical fields. Force affects objects by producing acceleration, deceleration, or changes in direction.

The net force on particle q1 is the sum of the forces due to the two other particles. The force on particle q1 due to particle q2 is given by Coulomb's Law:

\(F12 = k(q1q2/r12^2)\)

Where k is the Coulomb's Constant, q1 and q2 are the charges of the two particles, and r12 is the distance between them, which is 0.220m.

Similarly, the force on particle q1 due to particle q3 is given by:

\(F13 = k(q1q3/r13^2)\)

Where q1 and q3 are the charges of the two particles, and r13 is the distance between them, which is 0.330m.

The net force on particle q1 is then the vector sum of these two forces:

Fnet = F12 + F13

Substituting the values for the charges and distances into Coulomb's Law gives:

\(Fnet = (9*10^9)(-(8.99*10^-6)(5.16*10^-6)/(0.22^2)) + (9*10^9)(-(8.99*10^-6)(-89.9*10^-6)/(0.33^2))\)

Simplifying, we get

\(Fnet = 1.45 * 10^-4 N\)

Therefore, the net force on particle q1 is\(1.45 * 10^-4 N.\)

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Answer:

7/20

Explanation:

0.35 as a fraction =35/100

35/100 can b divided by 5 so =7/20

0.350 simplified as a fraction is 7/20

Answer:

7/20

Explanation:

Joseph's velocity was 4.5 meters per minute

Velocity is the rate of change of displacement of an object with respect to time, and it is measured in units of distance per unit time. Velocity is a physical quantity that describes the rate at which an object changes its position. It is a vector quantity, which means it has both magnitude

We can start by using the formula:

velocity = distance / time

Joseph's velocity can be calculated by dividing the distance he rose by the time it took him:

Substitute the values in the equation

velocity = 5.4 meters / 1.2 minutes

Simplifying this expression, we get:

Velocity = 4.5 meters per minute

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Answer:

Spring constant: approximately \(28\; {\rm N\cdot m^{-1}}\).

Unloaded length: approximately \(7.0\; {\rm cm}\).

(Assume that the weight of the spring is negligible, and that \(g = 9.81\; {\rm N\cdot kg^{-1}}\).)

Explanation:

Divide the tension \(F\) on the spring by the displacement \(x\) to find the spring constant. \(k\):

\(\begin{aligned}k &= \frac{F}{x}\end{aligned}\).

Let \(L_{0}\) denote the unloaded length of the spring (in meters.)

When the \(0.225\; {\rm kg}\) mass is on the spring, the tension on the spring would be \(m\, g = (0.225)\, (9.81) \; {\rm N} \approx 2.207\; {\rm N}\).

It is given that the length of the spring with this \(0.225\; {\rm kg}\) mass attached is \(L = 0.15\; {\rm m}\). Subtract the initial length of the spring \(L_{0}\) from the current length to find the displacement of the spring: \(x = L - L_{0} = 0.15 - L_{0}\).

Divide the tension on the spring by the displacement to find an expression for the spring constant:

\(\begin{aligned}k &= \frac{F}{x} \approx \frac{2.207}{0.15 - L_{0}}\end{aligned}\).

Similarly, when the \(1.85\; {\rm kg}\) object is on the spring, the tension on the spring would be \(m\, g = (1.85)\, (9.81) \; {\rm N} \approx 18.15\; {\rm N}\).

Subtract the initial length \(L_{0}\) from the current length \(L = 0.725\; {\rm m}\) to find the displacement: \(x = L - L_{0} = (0.725 - L_{0})\; {\rm m}\).

Divide the tension on the spring by the displacement to find another expression for the spring constant:

\(\begin{aligned}k &= \frac{F}{x} \approx \frac{18.15}{0.725 - L_{0}}\end{aligned}\).

Equate the two expressions for the spring constant \(k\) and solve for the unloaded length \(L_{0}\):

\(\begin{aligned}\frac{18.15}{0.725 - L_{0}} &= \frac{2.207}{0.15 - L_{0}}\end{aligned}\).

\((18.15)\, (0.15 - L_{0}) = (2.207)\, (0.725 - L_{0})\).

\(\begin{aligned} L_{0} &\approx \frac{(18.15)\, (0.15) - (0.725) (2.207)}{18.15 - 2.207}\; {\rm m} \\ &\approx 0.070\; {\rm m}\end{aligned}\).

Substitute \(L_{0}\) back into one of the two expressions for the spring constant \(k\) and evaluate:

\(\begin{aligned}k &\approx \frac{18.15}{0.725 - L_{0}} \\ &\approx \frac{18.15}{0.725 -0.070} \approx 28\; {\rm N\cdot m^{-1}} \end{aligned}\).

Apply unit conversion:

\(0.070\; {\rm m} = (0.070 \times 10^{2})\; {\rm cm} = 7.0\; {\rm cm}\).

In other words, the unloaded length of the spring would be approximately \(7.0\; {\rm cm}\).

The correct answer to part a) is, the force constant of the spring can be found using Hooke's Law and it is 3.83 N/m, and part b) is, the unloaded length of the spring is the same as the length when the 1.85 kg mass is hanging from it, which is 0.725 m.

Part (a) To find the force constant of the spring, we can use Hooke's Law, which states that the force exerted by a spring is equal to the spring constant multiplied by the displacement from equilibrium.

The equation for this is F = kx, where F is the force, k is the spring constant, and x is the displacement from equilibrium.

In this case, we can use the two given lengths and masses to find the displacement from equilibrium and the force exerted by the spring.

The displacement for the first mass is 0.15 m - 0.725 m = -0.575 m, and the force is 0.225 kg * 9.8 m/s^2 = 2.205 N. The displacement for the second mass is 0.725 m - 0.725 m = 0 m, and the force is 1.85 kg * 9.8 m/s^2 = 18.13 N.

We can then plug these values into the equation F = kx and solve for k:

2.205 N = k(-0.575 m)
k = -2.205 N / -0.575 m
k = 3.83 N/m

Therefore, the force constant of the spring is 3.83 N/m.

Part (b) To find the unloaded length of the spring, we can use the equation x = F/k, where x is the displacement from equilibrium, F is the force, and k is the spring constant.

Since the unloaded length of the spring is when the force is zero, we can plug in F = 0 and k = 3.83 N/m to solve for x:

x = 0 N / 3.83 N/m
x = 0 m

Since the displacement from equilibrium is zero, the unloaded length of the spring is the same as the length when the 1.85 kg mass is hanging from it, which is 0.725 m.

Therefore, the unloaded length of the spring is 0.725 m, or 72.5 cm.

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Answer:

= 4000N/m or 4000J

Explanation:

Work done = force × distance

= 200 N × 20 m

= 4000N/m or 4000J

Answer:

.21

Explanation:

i see everyone got it wrong so ill give you the answer, good luck :)

Answer:

False

Explanation:

Electrons

Here are the four strings (two members and two non-members) for each of the following languages, with the alphabet σ = {a,b}

Language:

Language:

Members:

Language:

Members:

Language:

The alphabet is a writing system based on the symbols of vowel and consonant phonemes. The word alphabet is taken from the Greek language, from the first two letters of their writing, namely alpha and beta and alphabet is a set of graphics or characters used to represent the phoneme structure of a language. The phoneme itself means the smallest unit of sound capable of showing contrast in meaning.

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Answer:

Friction

Explanation:

The energy of the photon is inversely proportional to its wavelength.

Since photons are thought of as point particles, they are said to be physically unsized and unstructured. Since they cannot be divided into smaller parts, they are regarded as elementary particles.

The wavelength of the photon and the size of the absorbing object determine how far away from the photon's line of transmission one must be to interact with or absorb it.

In general, the likelihood of contact or absorption increases with proximity to the line of propagation.

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Answer:

The energy will be increased by a factor 16

Explanation:

Mathematically, we have it that the energy carried by the sound wave is directly proportional to the square of the amplitude

So we have it that;

E = k * A^2

where E is the wave energy

K is the constant value

A is the amplitude value

So;

If E1 = k * (A1)^2

E2 = k * (A2)^2

But A2 = 4A1

E2 = k * (4A1)^2

E2 = k * 16(A1)^2

Divide E2 by E1

E2/E1 = k/k * 16(A1)^2/(A1)^2

E2/E1 = 16

E2 = 16 * E1

so simply, the energy will be increased by a factor of 16

Answer:

B. Gravity

Explanation:

Earth pulling on an object is known as gravity.

According to the ideal gas law, PV = nRT, where P is pressure, V is volume, n is the amount of gas, R is the ideal gas constant, and T is temperature. Assuming constant temperature and pressure, the equation becomes V = nR/P. This shows that volume and amount of gas are directly proportional to each other. Therefore, the correct answer is a. They are directly related. An increase in the amount of gas will result in an increase in volume, and a decrease in the amount of gas will result in a decrease in volume, as long as the temperature and pressure remain constant.

mark me as brainliest if that helps

Answer:

Fixed pulleys are a very common pulley. These pulleys are secured to a single spot. ...

Movable Pulleys are yet another type of pulley. ...

Compound Pulley Systems are a combination of both movable and fixed pulleys.

Explanation:

there are three different types of pulleys:

Fixed pulleys are a very common pulley. These pulleys are secured to a single spot. ...

Movable Pulleys are yet another type of pulley. ...

Compound Pulley Systems are a combination of both movable and fixed pulleys.

Answer:

bedrock?

Explanation:

The ground is in the way.