motion observed from a particular frame of reference is

Answer:

0.05

Explanation:

You should list the choices.

Efficiency = energy used / energy need * 100%

Efficiency = 5%

energy used = ?

energy needed = 1

Formula

Efficiency = energy used/energy needed * 100

100 * efficiency * energy needed = energy used.

Solution

1.00 * 5% = 1.00 * 5/100 = 1.00 * 0.05 = 0.05

Your answer should be something resembling 0.05 Joules

Answer:

8-5=3

The bigger force is to the left

3N to the left

Explanation:

we can use the equation P = I^2R, where P is the power dissipated by the resistor, I is the current flowing through the resistor, and R is the resistance of the resistor. From the information given in the question, we know that the emf (or voltage) of the battery is 12 V and the internal resistance of the battery is 0.5 Ω. This means that the total resistance in the circuit (including the internal resistance of the battery) is Rtotal = 0.5 Ω + R, where R is the resistance of the external resistor. We also know that a current of 6.4 A is drawn from the battery when the resistor is connected across the terminals.

Using Ohm's law (V = IR), we can find the voltage drop across the external resistor:

Now we can use the power equation to find the power dissipated by the external resistor:

Substituting the value we found for Vtotal gives:

Resistor is a passive electronic component that functions to inhibit or regulate the electric current in an electronic circuit. Resistors have a resistance or resistance value that is determined by the material and shape. Resistors are usually denoted by the letter R and the unit is Ohm (Ω).

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Explanation:

50 meters north in 10 seconds.

speed = distance ÷ time = 50 meters ÷ 10 seconds = 5m/s

The specific heat of the metal is approximately 0.221 J/g°C.

To calculate the specific heat of the metal, we can use the principle of heat transfer. The heat lost by the metal is equal to the heat gained by the water, assuming no heat is lost to the environment.

First, let's calculate the heat absorbed by the water using the formula:

Q_water = m_water * c_water * ΔT_water

where:

m_water is the mass of water in grams (since density = mass/volume, and density of water is approximately 1 g/mL, we have 35 g of water),

c_water is the specific heat capacity of water (4.186 J/g°C),

ΔT_water is the change in temperature of water (final temperature - initial temperature).

ΔT_water = 34.5°C - 28.7°C = 5.8°C

Q_water = 35 g * 4.186 J/g°C * 5.8°C = 851.013 J

Since the heat lost by the metal is equal to the heat gained by the water, the specific heat of the metal can be calculated using the formula:

Q_metal = m_metal * c_metal * ΔT_metal

where:

m_metal is the mass of the metal in grams (4.82 g),

c_metal is the specific heat capacity of the metal (unknown),

ΔT_metal is the change in temperature of the metal (final temperature - initial temperature).

ΔT_metal = 34.5°C - 115.0°C = -80.5°C

Q_metal = -851.013 J (since heat lost by the metal is equal in magnitude but opposite in sign to the heat gained by the water)

Solving for c_metal:

-851.013 J = 4.82 g * c_metal * -80.5°C

c_metal = -851.013 J / (4.82 g * -80.5°C) ≈ 0.221 J/g°C

Therefore, the specific heat of the metal is approximately 0.221 J/g°C.

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After several contacts with the charged ball, there is an equal distribution of negative charge on both ends. Matter is vulnerable to force due to a physical property known as electric charge.

A magnetic field holding them. Protons and electrons, which are charge carriers, regularly move both positive and negative electric charges. An object with a net charge of zero is said to be "neutral." In physics, a force is an effect that has the ability to change how an object moves. A mass-containing object's velocity or acceleration can be altered by a force (for example, moving from a condition of rest). Force can also be intuitively described as a push or a pull.

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Answer:

where is the multiple choice?

Answer:

False

Explanation:

The outer part of the Earth that is hard and solid is termed as lithosphere. It is the outermost part of the Earth's surface. The lithosphere covered under the oceans is the oceanic lithosphere while the lithosphere comprising the continental area is the continental lithosphere. Oceanic lithosphere is denser than the continental lithosphere because of the thin layer of the Earth that exists under the oceans.

The correct answer is 3.5 × 103 N .

F = k|q1| |q2|r2

= (8.99 × 109 N·m2C2 )

(7.369 × 10−18 C)(7.369 × 10−18 C)

(1.18 × 10−14 m)2

= 3.5 × 103 N .

Coulomb's inverse-square law, sometimes known as Coulomb's law, is a physical experiment that calculates the amount of force between two stationary, electrically charged particles. The electric force between two charged things at rest is sometimes referred to as electrostatic force or Coulomb force. Although the rule existed prior to 1785, it was published for the first time by French physicist Charles-Augustin de Coulomb, hence the name. Coulomb's law was critical to the development of electromagnetic theory, perhaps even its beginning point, because it allowed for meaningful discussion of the quantity of electric charge.

According to the law, the magnitude of the electrostatic force of attraction or repulsion between two point charges is precisely proportional to the product of charge and charge magnitudes.

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Answer:

Exothermic Reaction.

Explanation:

An exothermic reaction is a chemical reaction that releases energy in the form of light or heat. The burning of the candle is an exothermic reaction. Endothermic reactions - Heat is absorbed, like the Photosynthesis process.

Answer:

U^U

Explanation:

Two-dimensional vectors have two components: an x vector and a y vector. Each of these vector components is a vector in the direction of one axis. The sum of the components of vectors is the original vector. Three-dimensional vectors have a z component as well.

5 tickets for $ 12.50

Explanation

to figure out this we need to find the unit rate

so

Step 1

the rate is given by:

then

a) for 5 tickets and $12.50

replace and calculate

b) for 8 tickets and $20.16

replace and calculate

therefore, the better deal is 5 tickets for $ 12.50, you will get more tickets per dollar

I hope this helps you

The constant of proportionality (K) for the variation of electrical resistance of the wire is approximately 1.0588.

To find the constant of proportionality (K) for the variation of electrical resistance of a wire, we need to compare the lengths and resistances of two wires.

Let's denote:

Length of the first wire: L₁ = 255 feet

Resistance of the first wire: R₁ = 2

Length of the second wire: L₂ = 135 feet

Resistance of the second wire: R₂ = ?

According to the problem, the resistance of the second wire (R₂) is proportional to the length of the wire (L₂). We can set up the proportionality equation as follows:

R₁ / L₁ = R₂ / L₂

Substituting the given values:

2 / 255 = R₂ / 135

To find the constant of proportionality (K), we rearrange the equation:

R₂ = (2 / 255) × 135

Simplifying the calculation:

R₂ = 1.05882352941

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Answer:

1m every 0.28 seconds

Explanation:

she travelled 5 m in 1.4 s, so divide it by itself, 1.4s divided by 5 m gets you 0.28s for 1m

Answer:

Because their is an air pocket at the bottom of a boat air is lighter than water so it floats

Explanation:

....

Answer:

lau aba clear hunxau timi

Answer:

The answer is 480 g. You should sum the number

Based on the rays drawn above, the mirror forms the image at a distance at about 13 cm.

This can be determined through the use of the ray diagrams and the laws of reflection. When rays of light reflect off a concave mirror, they converge at a point called the focal point. The distance from the mirror to the focal point is called the focal length, which for this particular mirror is 6.5 cm. By drawing the incident ray from the top of the object parallel to the principal axis, and then drawing the reflected ray through the focal point, the point where they intersect is where the image forms. This distance, s', is approximately 13 cm.

In summary, the image forms at a distance of about 13 cm from the mirror.

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Answer:

C: decreasing the mass will decrease the kinetic energy.

Explanation:

The knetic energy of an object is directly proportional to its mass and the square of its velocity. This means that as mass increases, so does kinetic energy, and as mass decreases, kinetic energy decreases. Therefore, decreasing the mass of a moving object will decrease its kinetic energy, while increasing its mass will increase its kinetic energy.

Answer:

v = 1  i ^ m / s,   v = 1 m / s

Explanation:

In this problem we show the difference between vectors and scalars.

The average speed is

          v = Δx / Δt

The bold are vectors            

          Δx = 20-10 = 10 i^  m

           v = 10/10

           v = 1  i ^ m / s

the unit vector indicates that the velocity is on the x-axis

The average speed is

           v =Δx / Δt

           v = 10/10

           v = 1 m / s

in this case we have a scalar

Va and Vb are on opposite sides of the 6.24Ω resistor, so the potential difference across the resistor is negative. The circuit given in the figure below is a combination of parallel and series combinations of resistors and sources, which can be easily solved with the help of Kirchhoff's law and Ohm's law.

Solution:

First, let us label the points that are not known. Let Va be the voltage potential at point a, and Vb be the voltage potential at point b.

Voltage potential of point b:

Vb = ε2

Since the voltage source ε2 is directly connected to point b, the voltage potential of point b will be equal to the voltage provided by the source ε2 which is 9.27V.

Voltage potential of point a:

To find the voltage potential at point a, we first need to find the current through the 6.24Ω resistor (R2) since this resistor is connected between points a and b. To find the current flowing through the resistor R2 we need to use Ohm's law:

V = IR

IR = V/R2

Since the two branches are in parallel, the voltage across them will be the same as shown below:

Va - Vb = V1

V1 = i2R2

i2R2 = (ε2 - Va)R2/R1

i1 = (ε1 - Va)/[R1 + (R2R3/R1)]

Therefore, the potential difference between point a and point b is:

Va - Vb = 4.8218V - 9.27V

= -4.4482V

Va and Vb are on opposite sides of the 6.24Ω resistor, so the potential difference across the resistor is negative.

Therefore, the potential at point b is higher than the potential at point a.

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The correct answer is D. 1.55 hm

We need to convert dm to hectometers,

We know that,

1 decimeter = 0.001 hectometers

1 dm = 0.001 hm

Using this conversion we get

(1550 × 1) dm = (1550 × 0.001) hm

1550 dm = 1.55 hm

It means 1550 dm can expressed as 1.55 hectometers.

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A scientific theory is a well-substantiated explanation of some aspect of the natural world that is acquired through the scientific method and repeatedly tested and confirmed through observation and experimentation.

Answer: If there is a higher friction, the opposition force is higher so that it can reduce our speed. So, a factor that affects friction is the roughness or smoothness of the surface of the object. In comparison of the table with the fabric, the fabric will have a more opposition force. As the surface of the fabric is usually rougher than the surface of a smooth table. As there is more friction on a fabric, we will feel more opposition force on our finger tip.

Hope it helped! :>

Polymers that have grafting refer to the process of attaching a side chain or branch to the main polymer chain, resulting in a branched structure.

This branching can occur at multiple points along the main chain, resulting in a complex and highly branched structure. On the other hand, polymers that have branching refer to the natural occurrence of branches along the main polymer chain, without the addition of side chains.

This branching can occur randomly, resulting in a more linear or slightly branched structure. polymers with grafting involve the intentional addition of side chains to the main chain, resulting in a highly branched structure, while polymers with branching refer to the natural occurrence of branches along the main chain.

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Answer:

Explanation:

The kinetic energy of an object can be found by using the formula

\(k = \frac{1}{2} m {v}^{2} \\ \)

v is the velocity

m is the mass

From the question we have

\(k = \frac{1}{2} \times 1300 \times {20}^{2} \\ = 650 \times 400 \\ = 260000\)

We have the final answer as

Hope this helps you