> what are the four states of matter? how are they defined?

Answer:

4.42 m/s EAST

Explanation:

Conservation of Momentum Law:  total momentum before the collision must equal the total momentum after the collision.

Momentum = P = mv

East is the positive direction.

(3000 kg)(15 m/s) - (2200 kg)(10 m/s) = (3000 kg + 2200 kg)v

45,000 kg·m/s - 22,000 kg·m/s = (5200 kg)v

23,000 kg·m/s = (5200 kg)v

v = (23,000 kg·m/s) / 5200 kg = 4.42 m/s EAST

The direction is east because the final velocity is (+)

Answer:

See the explanation below.

Explanation:

Solving the first image question:

C ) The resulting force is defined by Newton's second law which tells us that the sum of the forces on a body is equal to the product of mass by acceleration. That is, there must be a force that acts on a body to produce an acceleration. If there is no acceleration it is because there are no external forces or developed by the body. And if there is no acceleration the body moves at a constant speed, in a straight line, so the response is C.

For the second image, we must remember that weight is defined as the product of mass by gravitational acceleration.

W = m*g

where:

W = weight [N]

m = mass [kg]

g = gravity acceleration [m/s²]

Now we have

m = 50 [kg]

ge = Earth gravity acceleration = 10 [m/s²]

gp = Distant planet gravity acceleration = 4 [m/s²]

We = ge*m

We = 10*50 = 500 [N]

Wp =gp*m

Wp = 4*50 = 200 [N]

Therefore the answer is D

For the third image, The mass is always going to be preserved, regardless of where the body or object is in space, its weight is the only one that changes since the gravitational force is modified. That is, the mass on the moon and on Earth will always be the same.

m = 70 [kg]

First, we must calculate the acceleration, by means of the following equation of kinematics.

\(v_{f} =v_{o} +a*t\)

where:

Vf = final velocity = 20 [m/s]

Vo = initial velocity = 0 (because stars from the rest)

a = acceleration [m/s²]

t = time = 4 [s]

20 = 0 + a*4

20 = 4*a

a = 5 [m/s²]

Now using Newton's second law which tells us that the total force acting on a body is equal to the product of mass by acceleration.

F = m*a

where:

F = force [N] (units of Newtons)

m = mass = 2 [kg]

a = acceleration = 5 [m/s²]

F = 2*5

F = 10 [N]

The body of Figure D, since a total force of 25 [N] to the left acts on it, in the rest of cases the force is zero or much less than 25 [N]

50 + 40 - 35 - 30 = F

F = 25 [N]

Answer:

Flexible and responsive to the clients requests

Explanation:

Change in design is the alteration of the specification of a product based on present or current requirements, as such change in design can take place at any stage of a product life cycle.

However, it is more cost effective to make changes to the design at the early stages of a product than at the later stages, due to the cost incurred in making adjustments and the previous expenses incurred if the design that was later changed had moved into more advanced stages.

When the resistor in the circuit has a larger resistance value, it will lower the total current that flows in the circuit.

In an electric circuit, resistance is the opposition that an electrical circuit exhibits to the flow of electric current. In general, resistance is measured in ohms (Ω).

When large resistance used:

When large resistor added:

As a result, adding a larger resistor to a circuit would lower the total current that flows in the circuit.

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The requried combined length of the trains are 1.8 kilometers.

Velocity is defined as the rate of change in the position of an object with respect to time.

Here,

Let's first convert the speeds from km/h to m/s to make our calculations easier,

The first train travels at 108 km/h = 30 m/s.

The second train travels at 72 km/h = 20 m/s.

Now, we can calculate the relative speed of the trains:

The relative speed between the two trains is 30 m/s - 20 m/s = 10 m/s.

We know that the first train overtakes the second train in 60 seconds. During this time, the first train will cover a distance equal to the combined length of both trains.

Let's denote the length of the first train as L₁ and the length of the second train as L₂. Then, we can write,

Distance covered by the first train in 60 seconds = L₁

Distance covered by the second train in 60 seconds = L₂ + L₁ (because the second train is L₂ behind the first train when it is overtaken)

The speed of the first train is 30 m/s, so its distance covered in 60 seconds is:

Distance covered by the first train in 60 seconds = 30 m/s x 60 s = 1800 m

Similarly, the speed of the second train is 20 m/s, so its distance covered in 60 seconds is,

Distance covered by the second train in 60 seconds = 20 m/s x 60 s = 1200 m

L₁ = 1800 m - 1200 m = 600 m

L₁ + L₂ = 1800 m

So the combined length of both trains is:,
L₁ + L₂ = 1800 m

L₁ + L₂ = 1.8 km

Therefore, the combined length of both trains is 1.8 km.

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\(\\ \sf\longmapsto 35\%\:of 11\)

\(\\ \sf\longmapsto 35\%\times 11\)

\(\\ \sf\longmapsto \dfrac{35}{100}\times 11\)

\(\\ \sf\longmapsto \dfrac{385}{100}\)

\(\\ \sf\longmapsto 3.85KJ\)

\(\\ \sf\longmapsto 3850J\)

Answer:

the charges get closer together

Answer:

hsnzbssj

Explanation:

To a Zerkonian observer, the lights on your starship do not flash simultaneously. The trailing light flashes first.

This is due to the phenomenon of time dilation, predicted by Einstein's theory of relativity. As you, the observer on the starship, are moving away from the planet Zerkon at a high velocity of 0.70c (70% of the speed of light), time appears to be passing slower for you relative to the stationary frame of reference on Zerkon. As a result, the time interval between the flashes of the warning lights, which is one minute in your frame of reference, will be dilated or stretched from the perspective of the Zerkonian observer. The light at the front of your starship, which is moving away from Zerkon, takes longer to reach the observer compared to the light at the trailing end. Therefore, the trailing light will be observed to flash first by the Zerkonian observer. Hence, the correct answer is C. The trailing light flashes first.

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The strength of the magnet is strongest at point A.

The strength of a magnetic field measures the effect of magnetic force per unit charge in a given magnetic field.

The strength  of a magnetic field can also be called magnetic field strength.

For every given bar magnet, the strength of a magnetic field is greatest at the poles and weakest at the middle way from the pole.

For the given bar magnet, the strength of the magnet is strongest at point A, followed by point B, and D, while the least is point C.

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Answer:

8.829 Joules

Explanation:

The potential energy of an object, is the energy it posses (the energy stored within the object) by virtue of its relative elevation or height, position, state, or arrangement

The potential energy of an object raised to a given height, P.E. = m·g·h

Where;

m = The mass of the object

g = The acceleration due to gravity, a constant ≈ 9.81 m/s²

h = The present height of the object

For the potato sack having a mass, m = 2 kg, and raised to a height, h = 450 cm = 0.45 m, we have;

The potential energy given to the potato sack, by raising its height, P.E. is given as follows;

P.E. = 2 kg × 9.81 m/s² × 0.45 m = 8.829 Joules

The potential energy given to the potato sack, P.E. = 8.829 Joules

Answer:

False

Explanation:

:)

Answer:

The answer is false

Explanation:

The clouds have nothing to do with the changes in the phases of the moon but, rather the postioning of the sun and the moon regarding revolution and the spinning of the earth on it axis.

I hope this helps you good luck and have a good day.

The spring constant of the spring is 32 N/m

From the question given above, the following data were obtained:

The spring constant, K for the spring can be obtained as follow:

E = ½Ke²

16 = ½ × K × 1²

16 = ½ × K

Cross multiply

K = 16 × 2

K = 32 N/m

Thus, the spring constant is 32 N/m

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Answer:

it's b I guess not sure

Explanation:

The reading of the balance for a body with mass 3kg and volume 4 × 10⁻⁴ in air and when fully immersed in water are 29.4N and 25.5N, respectively.

The weight of an object is the force which is acting on the object due to the influence of gravity. Weight is a vector quantity because it has both the magnitude and direction. The gravitational force acts on the object.

The reading of the balance when the body is in air, W = mg = (3) × (9.8) = 29.4 N

The reading of the balance when the body is fully immersed in water is:

F = mg − ρgV = (3) × (9.8) − (1000) × (9.8) × (0.0004) = 25.5 N

Therefore, the reading of the balance in the given conditions are 29.4N and 25.5N.

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Answer: Radioactive decay is the breakdown of a material into stable isotopes which are used for determining the age of the ancient material.

Explanation:

The radioactive decay is a natural process in which an ancient or old material whether in the form of rock, object or fossil break down into elements. Carbon 14 is an unstable isotope which decays to produce stable elements, the dating procedure uses these stable elements and the rate of decay of the isotopes to determine the age of absolute ancient of the objects but exact age cannot be determined just an approximation can be accepted.

Answer:

Online means connected to a network.

Credible means reliable or trustworthy

Cite means to quote from an article or book.

Answer:

  85.2 N

Explanation:

You want to know your weight if the Earth were 3 times as massive and had 5 times the present radius. Your weight is 710 N.

Your weight is proportional to the mass of the Earth and the square of the radius between your mass and the center of the Earth. The revised dimensions of the earth would multiply your weight by ...

  W = k(M/r²) = 710 N

  W' = k((3M)/(5r)²) = k(M/r²)(3/25) = (710 N)(3/25) = 82.5 N

Your weight would be 82.5 N.

Answer:

We can use conservation of momentum and conservation of energy to solve this problem.

Conservation of momentum:

Initial momentum = final momentum

m1v1 + m2v2 = (m1 + m2)v'

where m1 = 20 g = 0.02 kg, v1 = 10 m/s, m2 = 40 g = 0.04 kg, v2 = 0, v' is the final velocity of both balls after collision.

Solving for v':

v' = (m1v1 + m2v2)/(m1 + m2)

v' = (0.02 x 10 + 0.04 x 0)/(0.02 + 0.04)

v' = 6.67 m/s

Conservation of energy:

Initial kinetic energy = final kinetic energy

(1/2)m1v1^2 + (1/2)m2v2^2 = (1/2)(m1 + m2)v'^2

where v' is the final velocity calculated from conservation of momentum.

Solving for the total change in kinetic energy:

ΔKE = (1/2)(m1v1^2 + m2v2^2) - (1/2)(m1 + m2)v'^2

ΔKE = (1/2)(0.02 x 10^2 + 0.04 x 0^2) - (1/2)(0.02 + 0.04) x 6.67^2

ΔKE = -0.518 J

Therefore, the answer is (E) -518 x 10^-1.

Driving a car 100m requires the same amount of work as pushing it 100m by hand as the concept of work in physics refers to the transfer of energy when a force is applied over a certain distance.

When driving a car or pushing it by hand, the same amount of work is done because the distance covered is the same. However, it's important to note that the power required to accomplish this work may differ, as power is the rate at which work is done or energy is transferred. So, while the work is the same, the power required for driving a car is typically much higher than the power needed to push it by hand.

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The ratio of tension in the guitar string before and after the beats is 1.079.

Frequency of tuning fork, f = 255 Hz

Beats produced, fb = 10 Hz

The expression for the beat frequency between the tuning fork and guitar string is given by,

fb = f' - f

So, the frequency of the guitar string,

f' = fb + f

f' = 10 + 255

f' = 265 Hz

The frequency of the note produced is directly proportional to the square root of the tension in the string.

f ∝ √t

So,

f'/f = √(t'/t)

t'/t = (f'/f)²

t'/t = (265/255)²

t'/t = (1.039)²

t'/t = 1.079

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 The liquid is being forced up against the stopper, Student A correctly asserts that the pressure at level C must be higher than air pressure.

Thus, The right column pulls down on the stopper when the liquid is taken from the left column, adding pressure to the liquid at level C.

The pressure at level C rises above atmospheric pressure as a result of this increased force.

Student C also presents a convincing argument when he claims that because the liquid is denser than air, the pressure at level C cannot be lower than atmospheric pressure. Pressure in a fluid rises with depth because of the weight of the fluid above.

ΔP = P_C - P_A, where P_C denotes the pressure at level C and P_A is the pressure at level A, and P denotes the pressure difference. Since the pressures at levels C and A are equal because they are at the same height, there is no pressure difference (P = 0). As a result, there is no pressure difference between level C and level A.

 Thus, The liquid is being forced up against the stopper, Student A correctly asserts that the pressure at level C must be higher than air pressure.

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a compound machine is made of several simple machines

the difference is like a tree and a jungle

The answer is D. distance between trough and crest. Wavelength is the distance between two consecutive points of the same phase on a wave, such as two adjacent crests, troughs, or zero crossings.

Wavelength is the distance between two consecutive points of the same phase on a wave, such as two adjacent crests, troughs, or zero crossings. So the answer is the distance between the trough and crest.

The other options are incorrect. Option A is the length of time the wave has been in motion, which is not the same as wavelength. Option B is the distance between the trough and the trough, which is half of the wavelength. Option C is the distance between the quiet water level and the crest, which is not a physical measurement of the wave.

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Answer:

wildlife reserves are not available for camping...but you can camp at a skatepark

Answer:

earth

sorry I need points but I don’t know the answer again I’m really sorry

Given data:

Radius of each mirror = 0.21 m

Area of the spot on the receiver = 200 cm²

Intensity of the incident light = 1390 W/m²

Let's first convert the area of the spot on the receiver from cm² to m²:1 cm² = (1/100)² m²= 0.0001 m²

Therefore, area of the spot on the receiver = 200 cm²= 200 × 0.0001 m²= 0.02 m²

Now, the total area that the three mirrors are focusing the light on the receiver = 0.02 m²

Intensity is the power received per unit area.

Intensity of the light on the receiver= Power/Area= 1390 W/m² × 0.02 m²= 27.8 W

Thus, the intensity of the light on the receiver is 27.8 W/m².

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The statement that is said to be the a valid conclusion based on the results of this experiment is that: option c; Cattails grow the fastest when they receive maximal volumes of water

Cattails is known to be a plant that is said  to possess “wet feet” in almost all of the growing season.

Note that when a person want to control the plant cattails, you will be required to distort the root system via the use of cutting, hand-pulling, dredging, flooding, and others.

Hence, The statement that is said to be the a valid conclusion based on the results of this experiment is that: option c; Cattails grow the fastest when they receive maximal volumes of water

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See full question below

Which of the following statements is a valid conclusion based on the results of this experiment?

a. Cattails grow the fastest when they receive minimal volumes of water

d. All plants grow fastest when they receive maximal volumes of water

b. Cattails grow the fastest when they receive intermediate volumes of water

e. Both c and d

c. Cattails grow the fastest when they receive maximal volumes of water

An electric circuit is a closed loop or pathway that allows electric charges to flow. This statement is True.

The charge is the physical quantity which experiences electrostatic force depending on its own polarity.

An electric circuit a kind of closed loop, with a voltage source and resistors connected.

The positive terminal of voltage source emits the charges towards the negative terminal completing the pathway of circuit.

Thus, the given statement is true.

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