Please help me on 6 question

Answer:

The coefficient of friction should in the majority of cases, remain constant no matter what your normal force is. When you apply a greater normal force, the frictional force increases, and your coefficient of friction stays the same. Here's another way to think about it: because the force of friction is equal to the normal force times the coefficient of friction, we expect (in theory) an increase in friction when the normal force is increased.

One more thing, the coefficient of friction is a property of the materials being "rubbed", and this property usually does not depend on the normal force

(a) The linear momentum of the system is conserved due to the absence of external forces. (b) The kinetic energy of the system is generally not conserved in an explosion due to energy transfers and losses associated with the process.

(a)  According to the principle of conservation of momentum, the total momentum of an isolated system remains constant if no external forces act upon it. In the given scenario, the bomb is initially at rest, which means the total momentum of the system is zero before the explosion. After the explosion, the bomb fragments move in different directions, but their individual momenta add up to zero. Thus, the total momentum of the system remains conserved.

(b) In an explosion, a significant amount of potential energy stored in the bomb is rapidly converted into kinetic energy of the fragments. As the bomb explodes, the fragments gain kinetic energy, resulting in an increase in the total kinetic energy of the system. Additionally, the explosion may cause the fragments to collide with other objects or experience air resistance, leading to energy losses in the form of heat, sound, or work done against external forces. These energy losses further prevent the conservation of kinetic energy.

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The statement best describes the primary difference between scientific investigation and technological design is Scientific investigation involves experiments, and technological design involves products. Option D

It can be said that both scientific investigation and technolgical design require problem-solving, creativity, and rigorous methods.

However, both of them have different objectives. While Scientific investigation seeks to expand knowledge and understanding of the natural world. Research involvs hypothesis testing and different experiments;

on the other hand, Technological design, wants to create or improve products, processes, or systems to meet specific needs or solve particular problems.

It can then be defined as the application of scientific knowledge for practical purposes.

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The magnitude of the object's acceleration is determined as 3.12 m/s².

The magnitude of resultant force acting on the object is calculated as follows;

F = √[(x₁i + x₂i)² + (y₁j + y₂j)²]

where;

F = √[(-7.5 + 8.2)² + (4.9 + 3.5)²]

F = 8.43 N

The magnitude of the object's acceleration is calculated by applying Newton's second law of motion as follows;

F = ma

a = F/m

where;

a = (8.43) / (2.7)

a = 3.12 m/s²

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The vector field that expresses the density of induced or permanent electric dipole moments in a dielectric medium is known as polarization density (also known as electric polarization or just polarization).

Thus, A dielectric is considered to be polarized when its molecules acquire an electric dipole moment when exposed to an external electric field.

Electric polarization of the dielectric is the term used to describe the electric dipole moment induced per unit volume of the dielectric material.

The forces that emerge from these interactions can be calculated using the polarization density, which also defines how a material reacts to an applied electric field and how it modifies the electric field. It is comparable to magnetization, which measures a material's equivalent response.

Thus, The vector field that expresses the density of induced or permanent electric dipole moments in a dielectric medium is known as polarization density (also known as electric polarization or just polarization).

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Answer:

The answer is D) diagonal line with varying slope, from 3 to 5 on USATestprep

Explanation:

Answer:

Explanation:

F = GMm/d²

F = 6.67259 x 10⁻¹¹(2.39)(0.016) / 0.0681²

F = 5.5019685...x 10⁻¹⁰ N

round as appropriate, probably no more than 3 significant figures.

Value of G seems low, but well within the 3 significant figures of the other numerals. I typically see G = 6.674 x 10⁻¹¹

Answer:

10 mph

Explanation:

Answer: d) 5.88

Explanation:

Answer:

h

Explanation:

1) FG

Explanation:

During which time interval (AB, BC, CD, DE, EF, FG) was the cart traveling at its greatest speed?

Answer:

Just gonna take this at free points and yes you are right but I am confused on what you wanted us to do

Answer:

B

Explanation:

Answer:

4 (D): twice the voltage, and the same current will flow through each.

Explanation:

When we have batteries in series in a circuit, the equivalent voltage will be the sum of their voltages, and the current flowing through then will be the same.

These batteries are identical, so they have the same voltage, therefore when they are put in series, the equivalent voltage will be twice the voltage of one battery.

So the correct option is 4 (D): twice the voltage, and the same current will flow through each.

The volume of the vegetable oil is  0.00003998 m³.

The density of vegetable oil,

ρ = 913 kg/m³

The mass of vegetable oil,

m = 0.0365 kg

To find: The volume of the vegetable oil, V Solution: The density of any substance is defined as the mass of the substance per unit volume.

The formula for density is:

ρ = m/V

where, ρ is the density of the substancem is the mass of the substance V is the volume of the substance We can rearrange the above formula to find the volume of the substance:

V = m/ρSubstituting the given values of mass and density in the above formula,

We get:

V = 0.0365 kg / 913 kg/m³ = 0.00003998 m³ (approx)

Therefore, the volume of the vegetable oil is approximately 0.00003998 m³.

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Answer:

0.2 km/minute or 12 km/h

Explanation:

All you have to do is divide distance by time to find the speed. 1/5 km/min is the speed into which we simplify to 0.2 km/min. I then multiplied by 60(numerator and denominator) since there are 60 minutes in an hour to get 12 km/h.

Answer:

Instrumental error

Environmental error

Observational error

Theoritical error

The total resistance of the circuit is 49 Ω. The current strength in the circuit, when connected to a voltage source of 56 V, is approximately 1.14 A.

To calculate the total resistance of the circuit, we need to determine the equivalent resistance of the resistors connected in a series.

Given:

R1 = 4 Ω

R2 = 30 Ω

R3 = 10 Ω

R4 = 5 Ω

Calculate the equivalent resistance (RT) of R1 and R2, as they are connected in series:

RT1-2 = R1 + R2

RT1-2 = 4 Ω + 30 Ω

RT1-2 = 34 Ω

Calculate the equivalent resistance (RTotal) of RT1-2 and R3, as they are connected in parallel:

1/RTotal = 1/RT1-2 + 1/R3

1/RTotal = 1/34 Ω + 1/10 Ω

1/RTotal = (10 + 34) / (34 * 10) Ω

1/RTotal = 44 / 340 Ω

1/RTotal ≈ 0.1294 Ω

RTotal ≈ 1 / 0.1294 Ω

RTotal ≈ 7.74 Ω

Calculate the equivalent resistance (RTotalCircuit) of RTotal and R4, as they are connected in series:

RTotalCircuit = RTotal + R4

RTotalCircuit = 7.74 Ω + 5 Ω

RTotalCircuit ≈ 12.74 Ω

Therefore, the total resistance of the circuit is approximately 12.74 Ω.

To determine the current strength (I) when connected to a voltage source of 56 V, we can use Ohm's Law:

I = V / RTotalCircuit

I = 56 V / 12.74 Ω

I ≈ 4.39 A

Therefore, the current strength in the circuit, when connected to a voltage source of 56 V, is approximately 4.39 A (or 1.14 A, considering significant figures).

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Answer:

The order of maximum is   \(n = 5\)

Explanation:

From the question we are told that

  The  diffraction grating is  k  =  300 lines per mm  =  300000 lines per m

   The wavelength is  \(\lambda  =  630 \  nm  =  630 *10^{-9} \  m\)

   Generally the condition for constructive interference is mathematically represented as

      \(dsin \theta = n  * \lambda\)

Here n is the order maximum

d is the distance the grating which is mathematically represented as

    \(d =  \frac{1}{k}\)

=>   \(d =  \frac{1}{300000}\)

=>    \(d =  3.3*10^{-6}\  m \)

So

   \(n  = \frac{dsin \theta}{ \lambda}\)

at maximum  \(sin\theta  =  1\)

     \(n  = \frac{d}{\lambda}\)

=>   \(n  = \frac{3.3*10^{-6}}{630 *10^{-9}}\)

=>   \(n = 5\)

Answer:

In a rhetorical essay you only analyze and cite 1 source in a persuasive essay you cite and analyze many different sources

Explanation:

Based on the chart, it can be concluded that there is no clear pattern to the timing and duration of geomagnetic reversals, although scientists have been able to identify some general trends based on the geological and magnetic records.

Geomagnetic reversals, where the Earth's magnetic field flips its polarity, have occurred numerous times throughout Earth's history.

One conclusion that can be drawn about the frequency of polarity reversals is that they occur irregularly, with some periods having more frequent reversals than others.

Another conclusion that can be drawn is that the frequency of reversals appears to be decreasing over time. This can be seen by examining the geological record, which shows that the time between reversals has been steadily increasing over the past several million years.

Overall, while there is still much to be learned about geomagnetic reversals, it is clear that they are a natural and ongoing process that has occurred throughout Earth's history.

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Recall the definition of average velocity:

average v = ∆x / ∆t

The driver moves a distance of ∆x = 4.25 km = 4250 m in 2 min = 120 s, so the average velocity is

average v = (4250 m) / (120 s) ≈ 35.4 m/s

Under constant acceleration, the average velocity can also be computed by taking the average of the initial and final velocities:

average v = (initial v + final v) / 2

Solve for (final v) :

35.4 m/s = (20 m/s + final v)/2

final v ≈ 50.83 m/s

Recall the definition of average acceleration:

average a = ∆v / ∆t

Solve for a :

a = (50.83 m/s - 20 m/s) / (120 s)

a ≈ 0.257 m/s²

Answer:

Answer in explanation

Explanation:

Water is mainly used as coolant in heating systems like hot-water radiators. The main function of water in such systems, is to absorb as much heat as possible, in order to decrease the temperature of the system and as a result cool it.

The specific heat capacity is the measure of heat energy that is required to raise the temperature of unit mass of a substance through 1 °C. In other words, specific heat capacity quantifies the amount of heat that can be stored by a unit mass of a substance having a degree rise in temperature.

Thus, the more specific heat a substance has, the more heat it can absorb from the hot system. Hence, the specific heat capacity of a coolant must be high.

This is the reason why water, with its high specific heat capacity, is utilized for heating systems, such as radiators.

Answer:

f = 4.67 cm

Explanation:

Here, we can use the thin lens formula, as follows:

\(\frac{1}{f}= \frac{1}{p}+ \frac{1}{q}\\\\\)

where,

f = focal length of lens = ?

p = distance of object from lens = 12.4 cm

q = distance of image from lens = 7.5 cm

Therefore,

\(\frac{1}{f} =\frac{1}{12.4\ cm} +\frac{1}{7.5\ cm}\\\\\frac{1}{f} = \frac{1}{4.67\ cm}\)

f = 4.67 cm

Answer:

a the distance between the

Answer:

The correct option is  C

Explanation:

From the question we are told that

    The distance between axles of the car  is  \(d_a = 6.2\)

     The position of the car's center of mass is  \(D = 2.2 \ m \ in \ front \ of \ the \ axel\)

Now  we can evaluate the distance of the center of mass to the rear axle as follows

        \(k = d_a - D\)

substituting values

      \(k = 6.2 - 2.2\)

      \(k = 4 \ m\)

assuming the car is   at equilibrium,  taking moment about the center of mass

          \(W_{front \ axle} * D - W_{rear \ axle} * k = 0\)

=>        \(W_{front \ axle} * D = W_{rear \ axle} * k\)

=>       \(\frac{W_{front \ axle}}{W_{rear \ axle} } = \frac{k}{D}\)

substituting values

             \(\frac{W_{front \ axle}}{W_{rear \ axle} } = \frac{4}{2.2}\)

           \(\frac{W_{front \ axle}}{W_{rear \ axle} } = 1.81\)       Note [\(W_{front \ axle}\) is the front axle weight  and  

                                                      \(W_{rear \ axle}\) is the rear axle weight  ]

The magnitude of gravitational acceleration at the surface of a newly discovered exoplanet, having the mass to be 1.01 times the mass of Earth, and the radius of the planet to be 0.99 times the radius of Earth is 10.06 m/s².

The acceleration that an object experiences when gravity is the only force acting on it is known as gravitational acceleration.

In an empty space, all bodies accelerate at the same rate, regardless of their masses or compositions. This means that any two objects falling from the same height would always hit the ground at the same time if there was no air friction.

Depending on altitude, latitude, and longitude, this free-fall acceleration can range from 9.764 to 9.834 m/s² over the surface of the Earth. However, the accepted standard value is 9.80665 m/s². Gravity anomalies are the regions where this value dramatically varies.

According to the formula,

g = \(\frac{GM}{R^{2} }\)

where,

g is gravitational acceleration

G is gravitational constant,

M is mass of planet and,

R is the radius of the planet.

G = 6.67 × 10⁻¹¹

M = 1.01 × 6 × 10²⁴ kg

R = 0.99 × 6.4 × 10⁶ m

substituting the values and solving for g,

g = 10.06 m/s²

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The highest point in a ball's trajectory is when it is thrown vertically. The average speed of a plane is 254 m/s/s. A carousel rotates continuously.

seconds per metre Miles per hour (mph), kilometres per hour (km/h), and metres per second (m/s) are the three most popular speed units (mph). The distance an object covers in a given amount of time is its speed. Speed equals distance x time is the speed equation.

Galileo Galilei, an Italian physicist, is typically attributed with being the first to quantify speed by taking into account the distance travelled and the time required. Galileo defined speed as the amount of distance travelled in a given amount of time.

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Answer:

Speed is the time rate at which an object is moving along a path, while velocity is the rate and direction of an object's movement. Put another way, speed is a scalar value, while velocity is a vector. ... In its simplest form, average velocity is calculated by dividing change in position (Δr) by change in time (Δt).

Explanation: