1) A 1,600 kilogram car is also traveling in a straight line. Its momentum is 32,500 kg*m/s. What is the
velocity of the car?

The test statistic (Z-score) is approximately 4.95.

To calculate the test statistic (Z-score) for this hypothesis test, we can use the formula:

Z = (sample mean - hypothesized population mean) / (standard deviation / sqrt(sample size))

Sample mean (X-bar) = 37

Hypothesized population mean (μ) = 30

Standard deviation (σ) = 8

Sample size (n) = 50

Substituting these values into the formula, we get:

Z = (37 - 30) / (8 / sqrt(50))

Z = 7 / (8 / 7.071)

Z = 7 / 1.414

Z = 4.95 (rounded to two decimal places)

A statistical hypothesis test is a technique for determining if the available data are sufficient to support a certain hypothesis. We can make probabilistic claims regarding population parameters using hypothesis testing.

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Answer:

1. True 2.0

Explanation:

1. When balanced forces are acting on an object, they have a constant velocity, meaning that the velocity remains the same.

2. When an object begins at a starting point and returns back to that same starting point, its displacement would be 0.

I'm pretty confident in these answers, however, you must have studied this more than me, so let me know if you have any questions or concerns at all, I'll be glad to help. :)

Answer:

The mass of the object is 8.41 Kg.

Explanation:

Mechanical Force

The second Newton's law states that the net force exerted by an external agent on an object of mass m is:

F = m.a

Where a is the acceleration of the object. The SI unit for the force is the Newton: \(1\ Nw = 1~Kg.m/s^2\)

We are given the net force of F=29.43 N acting on an object and producing an acceleration of a=3.5~m/s^2.

To calculate the mass of the object, we solve the above equation for m:

\(\displaystyle m=\frac{F}{a}\)

\(\displaystyle m=\frac{29.43}{3.5}\)

Calculating:

m = 8.41 Kg

The mass of the object is 8.41 Kg.

Answer:

2.6 billion yrs old

Explanation:

3 = 12 (1/2)^n     n=2 half lives

2 * 1.3 bln = 2.6 bln

The critical angle for flint glass with an index of refraction surrounded by water is 41.8°.

The critical angle is the angle of incidence in the first medium (flint glass) at which all of the light is refracted into the second medium (water).

The formula for the critical angle is:

sin(c) = n₁/n₂

where:

c = critical angle

n₁ = index of refraction of the first medium

n₂ = index of refraction of the second medium

In this case:

n₁ = 1.65

n₂ = 1.33

Substituting these values into the formula:

sin(c) = 1.65/1.33

c = sin⁻¹(1.65/1.33)

c = 41.8°

Therefore, the critical angle for flint glass surrounded by water is 41.8°.

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Answer:

Because the output force is greater than the input force, the input distance must be greater than the output distance.

Explanation:

The area of the trapezoid shown in the question is 110.5 m².

Area is the region bounded by a plane shape.

To calculate the area of the trapezoid, we use the formula below

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

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The data set that is most likely from the car equipped with ABS is :

Although the plots related to your question is missing attached below is the missing data.  

The First plot ( acceleration vs time ) plot is the data that represents the application of brakes in a car fitted with ABS ( antilock braking system ) because of the absence of skidding effect between 6.5 and 9 seconds in the graph.

The skidding effect is present in the second plot around the same time because the car is not fitted with ABS  

Hence we can conclude that the graph that shows the car fitted with ABS is the first plot .

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A wave experiences reflection, refraction, Doppler effect, diffraction, and it can undergo both constructive and  destructive interference.

A wave can be defined as a disturbance in a medium that progressively transports energy from its source to another location, without transporting matter.

In Physics, there are two main (2) types of wave and these are;

Basically, some of the phenomenon and properties associated with waves include the following:

I. Doppler shift (Doppler effect).

II. Reflection.

III. Refraction.

IV. Diffraction.

V. Constructive interference.

VI. Destructive interference.

In conclusion, all waveform can be Doppler shifted, reflected, refracted,  diffracted, and can undergo constructive and  destructive interference.

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Answer:

Kinda? Depends what the question is fully asking

Explanation:

Acceleration is a change in velocity. So I guess if the velocity of something is -2 m/s and its positively accelerating at a value of +1 m/s, then that means every second its velocity changes by +1m/s.

So that -2 m/s thing after one second will be going -1 m/s.

After another second it'll be going 0 m/s.

After another itll be going +1 m/s and so on.

So at one point for a brief moment, it can have an acceleration but be at 0 m/s velocity.

Answer:

do explain what u need help with?

In every energy transfer and transformation, some energy is transformed into _____ ______

Answer:

Thermal Energy

Answer:

processes 1,3, and 4

Explanation:

i think

Teeth tear the food, the tongue reforms the food, and the stomach muscles break the food into small pieces are physical changes. Therefore, option (4) is correct.

A physical change can take place when the identity of the matter does not but some of the characteristics of the matter change. Physical changes of matter are categorized as reversible and irreversible in nature. For example, the freezing of water is a reversible physical change since the ice cube can melt again.

Physical change can be described as a kind of change where only the physical properties of substances such as solubility, color, odor, etc. can change. During physical changes, no chemical bonds are formed or broken between atoms.

The chemical nature and chemical composition of the matter remain unchanged during a physical change.  

In the digestive system, the breaking of food by teeth, tongue, and stomach muscles is a physical change. The food mixed with acids and broken by enzymes is a chemical change.

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To determine the magnitude of the unknown magnetic field, we need additional information such as the Hall coefficient (R_H) or the current (I) flowing through the material. The Hall voltage (V_H) alone is not sufficient to calculate the magnetic field.

The relationship between the Hall voltage, magnetic field, current, and Hall coefficient is given by the equation:

V_H = (R_H * B * I) / t

Where:

V_H is the Hall voltage,

R_H is the Hall coefficient,

B is the magnitude of the magnetic field,

I is the current flowing through the material, and

t is the thickness of the material.

Without knowing the values of R_H, I, or t, it is not possible to directly determine the magnitude of the unknown magnetic field using only the given Hall voltage of 0.340 µV.

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The correct answer to the question is option D (It increases when the planet approaches the sun, and decreases when it moves farther away).

Rotational kinetic energy (K) of an object is given by:

K = 1/2 Iω²

where, I = Moment of inertiaω = Angular velocity of the object.

A planet orbits the Sun in an elliptical orbit. The gravitational force acting between the Sun and the planet is known as centripetal force. This force is responsible for keeping the planet in a circular orbit around the Sun. Neglecting frictional effects, the total mechanical energy of the planet in an elliptical orbit remains constant.

However, the kinetic energy (K) and potential energy (U) vary with distance.

Let's say that when the planet is closest to the sun, its distance is rmin. Similarly, when the planet is farthest away from the Sun, its distance is rmax. At the closest distance to the Sun (r = rmin), the kinetic energy of the planet is minimum. This is because the planet moves the slowest at this point. When the planet moves away from the Sun, it moves faster and its kinetic energy increases.

The kinetic energy is maximum when the planet is farthest away from the Sun (r = rmax). As the planet continues to move away from the Sun, its speed decreases and so does its kinetic energy.

Therefore, the kinetic energy of the planet increases when the planet approaches the Sun and decreases when it moves farther away from the Sun.

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The major difference between a bimetallic stemmed thermometer and a thermistor is the principle of temperature measurement they utilize.

A bimetallic stemmed thermometer consists of two different metals bonded together. These metals have different coefficients of thermal expansion, causing the strip to bend when exposed to temperature changes. The degree of bending is proportional to the temperature, allowing the measurement of temperature based on the mechanical deformation of the bimetallic strip.

On the other hand, a thermistor is a type of temperature sensor that relies on the change in electrical resistance with temperature. Thermistors are typically made of semiconductor materials that exhibit a significant change in resistance as the temperature varies. The resistance of a thermistor decreases as the temperature increases, and vice versa. This change in resistance is used to measure and indicate the temperature.

In summary, while a bimetallic stemmed thermometer operates based on the mechanical deformation of a bimetallic strip, a thermistor measures temperature by monitoring the change in electrical resistance. Each type of thermometer has its advantages and applications based on the specific temperature range, accuracy requirements, and sensitivity needed in various contexts.

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Answer:

Forces come in pairs, so the force of gravity (9.8 N) with the mans weight (794N) on the earth is counteracted with the normal force ( the force of the earth back on the man) which is the same

Explanation:

Forces are available in pairs, so the force of gravity (nine.8 N) with the man's weight (794N) on the planet is counteracted with the everyday force ( the pressure of the earth again on the man) that's identical.

Gravitational force is a pressure that draws any items with mass. We name the gravitational force appealing as it constantly attempts to tug loads collectively, it never pushes them apart. In reality, every item, together with you, is pulling on each other objects inside the complete universe.

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The angle of refraction of the ray within the prism​  is 1.3

The angle of refraction is described as the angle between a refracted ray and the normal drawn at the point of incidence to the interface at which refraction occurs.

Given, μ=refractive index of liquid.

The angle of incidence, i = 60 °

internal reflection , angle of refraction r = 90 °

Now,  

sinr/ sini = μ / μ1

sin60° =  μ/ 1.5

μ= √3 / 2 x 1.5

μ=1.3​

in conclusion, the angle of refraction is the measurable quantity that indicates the amount of refraction taking place at any boundary.

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​

Complete question:

ACB is a right-angled glass prism with refractive index 1.5. Angle A, B, C are 60

∘

,30  

∘

and 90

∘

 respectively. A thin layer of liquid is on the AB. For a ray of light which is incident normally on AC to ;be totally reflected at AB, the refractive index of the liquid on AB should be

​

​

Answer:

100 m/s^2

Explanation:

F=ma

50 g = 0.05 kg

5 = 0.05a

a=100m/s^2

Answer:

100MS

Explanation:

I did the test and got 100%

Answer:

LOL! couldnt be me either bestieeeee

Answer:

-_-

Explanation:

i dont know What was XD??

The electric flux that flows through the loop is 4.27 Nm²/C, and the loop's normal ought to be rotated by about 39.5 degrees.

Electric flux is a characteristic of an electric field and refers to the number of electric field lines that cross a specific area. Electric field lines, according to this theory, begin with positive electric charges and end with negative electric charges.

Part a: The following formula must be used to determine the electric flux through the loop:

= E A cos() Since the electric field is parallel to the x-axis and the loop is circular, the area of the loop can be calculated as follows:

By substituting the given values for A = r², we obtain:

A = (0.177m)² = 0.0985 m² = 67.9° = 1.184 radians = (47.6 N/C)  (0.0985 m²)  cos(1.184)  4.27 Nm²/C Part (b) In order to determine the angle at which the flux through the loop becomes 0.304 Nm²/C, we can rewrite the equation for electric flux to account for:

= cos(-1)(/(EA))) By substituting the values provided, we obtain:

= cos(-1)(0.304 Nm²/C / (47.6 N/C  0.0985 m²))  = 39.5°; consequently, the loop's normal should be rotated by approximately 39.5°.

electric flux is a property of an electric field that can be described as the number of electric lines of force—also known as electric field lines—that cross a specific area. Electric field lines are thought to start with positive electric charges and end with negative electric charges.

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Answer:

The second law of a vibrating string states that for a transverse vibration in a stretched string, the frequency is directly proportional to the square root of the string's tension, when the vibrating string's mass per unit length and the vibrating length are kept constant

The law can be expressed mathematically as follows;

\(f = \dfrac{1}{2\cdot l} \cdot \sqrt{\dfrac{T}{m} }\)

The second law of the vibrating string can be verified directly, however, the third law of the vibrating string states that frequency is inversely proportional to the square root of the mass per unit length cannot be directly verified due to the lack of continuous variation in both the frequency, 'f', and the mass, 'm', simultaneously

Therefore, the law is verified indirectly, by rearranging the above equation as follows;

\(m = \dfrac{1}{ l^2} \cdot \dfrac{T}{4\cdot f^2} }\)

From which it can be shown that the following relation holds with the limits of error in the experiment

m₁·l₁² = m₂·l₂² = m₃·l₃² = m₄·l₄² = m₅·l₅²

Explanation:

Answer:

a) (0.0004·\(\mathbf{\hat i}\) - 1.55·\(\mathbf{\hat j}\)) m

b) 0.31 km/h·\(\mathbf{\hat i}\) + 0.00008 km/h·\(\mathbf{\hat j}\)

Explanation:

The given parameters are;

The circular motion of the airplane = 600 km/hour

The radius of the circular path = 3 km

The time it takes the cup to reach the floor of the airplane is given as follows;

s = u·t + 1/2·g·t²

1.5 = 1/2 × 9.81 × t²

t² = 1.5/(1/2 × 9.81)

t = √(1.5/(1/2 × 9.81)) ≈ 0.553 s

The location of the plane in 0.533 s is 600 km/hour × 0.533 s ≈ 83.83 meters

The angular velocity, ω = v/r = 600 km/hour/3 km = 200°/hour

Therefore, the angle covered in 0.533 s is 0.533 s × 200°/hour ≈ 0.0296°

tan(0.0296)*3000 ≈ 1.55 m vertical

3000 - cos(0.0296)*3000 ≈ 0.0004 m horizontal

The location of the cup relative to the plane will be

0 - (-0.0004·i + 1.55·j) = 0.0004·i - 1.55·j m

b) The speed of the cup relative to the plane when it hits the floor is given by the

The speed of the plane = 600 km/hour × cos(90 - 0.0296)j + 600 km/hour × sin(90 - 0.0296)j = -0.31 km/hour·i + 599.99 km/hour·j

The speed of the cup = 600 km/hour·j

The relative speed = 600 km/hour·j - ( -0.31 km/hour·i + 599.99 km/hour·j) = 0.31 km/hour·i + 0.00008 km/hour·j

The relative speed of the cup to the plane = 0.31 km/h·i + 0.00008 km/h·j

Therefore, given that there will be no relative speed in an inertia frame, the speed of the cup relative to the plane will be higher than when dropped in an inertia frame

Answer:

Newton believed that mass tells gravity how much force to exert. Einstein believed that mass tells space-time how to curve.

Explanation:

Isaac Newton believed that bodies on earth had a force of gravity pulling them down as a result of their masses.

Albert Einstein believed that the bodies were not pulled down but were moving around in a circular sphere/manner.

This confirms Newton believing that mass tells gravity how much force to exert and Einstein believing that mass tells space-time how to curve.

Answer:

first one is for the assignment second is for the quiz

Explanation:

Assignment - C.

Quiz - D.

Answer:

Geology Notes

1 Veryovkina Cave 2212[1] 13.5 km (8.4 mi)[1] Abkhazia / Georgia 43°23′52″N 40°21′37″E.

The color of the star at 5900K is close to the color of the sun, that is yellow. So the color of the star at 5900K will be yellow.

The color of light emitted by a hypothetical opaque, non-reflective body at a specific temperature expressed in kelvins is known as color temperature. Regardless of the temperature of other light sources, the color of their light is classified using the color temperature scale.

One aspect of visible light is color temperature. Lower color temperatures (2700–3000 K) are referred to as "warm colors," while color temperatures over 5000 K are referred to as "cool colors" (bluish) (yellowish).

The Sun closely resembles a radiator with a black body. The total radiative power per square unit determines the effective temperature, which is approximately 5780 K. Over the atmosphere, sunlight has a color temperature of approximately 5900 K.

Therefore, the star with a temperature around 5900K will have a color similar to that of the sun which is yellow.

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According to the given statement 197.33 is the speed of the bullet before impact.

The materials being used have an impact on the coefficient of friction. For instance, rubber on asphalt has a high coefficient of friction, which prevents the materials from sliding past one another as readily as ice on steel, which has a low coefficient of friction.

\(W_f=\frac{1}{2} m v_f^2-\frac{1}{2} m v_i^2\)

\(-\mu m g d=\frac{1}{2} m\left(v_f^2-v_i^2\right)\)

-0.370(9.81)(9.00) = 1/2(0 -\(v_i^2\) )

-32.66 = 1/2v²

v² = 65.62

v = √65.62

v = 8.11

Now by momentum conservation we have

m\(_1\)v\(_1\) = (m\(_1\) + m\(_2\))v

12v\(_1\) = (280 + 12)8.11

v\(_1\) = 197.33

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It takes approximately 1.77 seconds for the cord to completely unwind from the wheel.

The angular acceleration of the wheel is given as 2 rad/s^2. We can use the kinematic equation for angular motion to determine the time it takes for the wheel to complete one revolution, which is the time it takes for the cord to unwind once from the wheel:

\(\theta = 2 * \pi\\\omega_i = 0\\\alpha = 2 rad/s^2\\\)

t = ?

\(\theta = \omega_i * t + (1/2) * \alpha * t^2\\\)

Solving for t:

\(t = \sqrt{(2 * \theta / \alpha)}\\t = \sqrt{(2 * \pi / 2 rad/s^2)}\\t = \sqrt{(\pi)\\\)

t = 1.77 s (approx)

The rate at which the angular velocity of an item varies over time is known as its angular acceleration. In other words, it measures how quickly an object is changing its speed and/or direction of rotation. Angular acceleration is expressed in units of radians per second squared (rad/s²) or degrees per second squared (deg/s²).

When an object rotates, it experiences a torque that causes its angular acceleration. The amount of torque required to produce a given angular acceleration depends on the object's moment of inertia, which is a measure of how resistant an object is to changes in its rotation. Angular acceleration plays an important role in many physical systems, such as the motion of planets, the spinning of gyroscopes, and the movement of vehicles around corners.

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