11. Velocity-time graph for the motion of an object in a straight path is a straight line parallel to the time axis
(a) Identify the nature of motion of the body
(b) Find the acceleration of the body
(c) Draw the shape of distance time graph for this type of motion

Answer:

the worker is doing work because he is moving the bale of cotton

When a person sings in a shower and causes the shower to resonate with a fundamental frequency of 73 Hz, this is an example of a standing wave, also known as a resonance.

The fundamental frequency of a standing wave is determined by the length of the resonant cavity, which in this case is the shower. The fundamental frequency is related to the length of the cavity by the equation:

f = v / 2L

where f is the frequency, v is the velocity of sound in the medium (in this case, air), and L is the length of the cavity. Given that the shower has a length of 2.40 meters and the fundamental frequency is 73 Hz, we can use the equation above to calculate the velocity of sound in air.

73 = v / (2 * 2.40)

Solving for v, we get:

= v

= (73 * 2 * 2.40)

= 350.4 m/s

The speed of sound in air is approximately 343 m/s at 20 °C at sea level. The velocity of sound in air can change with temperature, humidity and pressure. Given that the velocity of sound in air is around 343 m/s, the frequency of 73 Hz is a close match to the fundamental frequency of the shower with 2.40 meters high, It is important to note that the fundamental frequency is not the only frequency that could resonate in the shower, other overtones and harmonics might also resonate.

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Question- Someone is singing in a shower that measures 2.40 meters from floor to ceiling, and notices their voice causes the shower to resonate with a fundamental frequency of 73 Hz. Here, this situation is an example of? justify. The given situation is an example of which physics phenomenon and justify the given example with some details.

The percent uncertainty in the measurement of an infant's pulse rate, which is recorded as 135 +/- 6 beats/min, is 4.4%.

The percent uncertainty is calculated by dividing the range of the measurement (in this case, 6 beats/min) by the average value of the measurement (in this case, 135 beats/min), and then multiplying by 100 to express it as a percentage. In this case, the range is 6 beats/min and the average value is 135 beats/min. Dividing 6 by 135 gives 0.0444, and multiplying by 100 gives 4.44%. Therefore, the percent uncertainty in this measurement is 4.4%.

This measurement indicates that the pulse rate of the infant can vary within a range of +/- 6 beats/min from the average value of 135 beats/min. The percent uncertainty provides a measure of the relative variability or precision of the measurement. A lower percent uncertainty would indicate a more precise measurement with less variability, while a higher percent uncertainty would indicate a less precise measurement with greater variability. In this case, a percent uncertainty of 4.4% suggests a reasonably precise measurement of the infant's pulse rate.

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Answer:

simple machine, any of several devices with few or no moving parts that are used to modify motion and the magnitude of a force in order to perform work. ... The simple machines are the inclined plane, lever, wedge, wheel and axle, pulley, and screw.

Answer:

The answer would be B. Lubricating surfaces.

Explanation:

Mark brainliest pls

Answer:

22236 mi

Explanation:

His third law dictates that in disposition, for every action (force), there is an equal and opposing reaction.

Newton's laws of motion are three fundamental classical mechanics laws that describe the relationship between an object's motion and the forces acting on it.

These laws are summarized as follows: Unless acted upon by a force, a body remains at rest or in motion at a constant speed in a straight line.

His third law states that in nature, for every action (force), there is an equal and opposite reaction.

When object A applies a force to object B, object B applies an equal and opposite force to object A. In other words, forces are the result of interactions.

Thus, this is the third law of motion by Newton.

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The force of gravity upon the object located a distance of 2R above the Earth's surface is 15 Newtons.

The correct answer is option D.

To determine the force of gravity upon an object located a distance of 2R above the Earth's surface (a distance of 3R from its center), we can use the inverse square law of gravity. The force of gravity between two objects is proportional to the product of their masses and inversely proportional to the square of the distance between their centers.

Let's assume that the mass of the object remains the same regardless of its position. The weight of an object is the force of gravity acting on it, so if the object weighs 30 Newton on the surface of the Earth (at a distance of R from its center), we can use this information to calculate the force of gravity at the new distance.

According to the inverse square law of gravity, the force of gravity (F) at a distance of 2R from the Earth's surface is given by:

F = (30 N) *\((R/R^2)^2\)

Simplifying this equation:

F = (30 N) * (1/R)

Now, substituting the value of 2R for R:

F = (30 N) * (1/(2R))

F = 15 N/R

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(45. 0 m/s) - (5.0 m/s) ÷ 20

40 m/s ÷ 20 s = 2 meter second minus 2.

I am sry if my ans is wrong

Answer:

All extended structure compounds form cubes. Sodium and chlorine atoms both have cubical shapes. In the extended structure of NaCI, atoms are arranged in a cubical pattern

Sure! Here are the steps for calculating the velocity and distance traveled by the car after 50 seconds :

Step 1: Calculate the velocity using the equation:

\(v = u + at\)

where:

- \(v\) is the final velocity

- \(u\) is the initial velocity (0 m/s, as the car starts from rest)

- \(a\) is the acceleration (3 m/s²)

- \(t\) is the time (50 seconds)

Substituting the values into the equation:

\(v = 0 + (3 \, \text{m/s²}) \times (50 \, \text{s})\)

Step 2: Calculate the distance traveled using the equation:

\(s = ut + \frac{1}{2}at^2\)

where:

- \(s\) is the distance traveled

- \(u\) is the initial velocity (0 m/s)

- \(a\) is the acceleration (3 m/s²)

- \(t\) is the time (50 seconds)

Substituting the values into the equation:

\(s = 0 \times (50 \, \text{s}) + \frac{1}{2} \times (3 \, \text{m/s²}) \times (50 \, \text{s})^2\)

Now, let's simplify these equations:

\(v = 3 \times 50\)

\(s = \frac{1}{2} \times 3 \times 50^2\)

Calculating the results:

\(v = 150\) m/s

\(s = 3750\) meters

Therefore, after 50 seconds, the car will have a velocity of 150 m/s and would have traveled a distance of 3750 meters.

Answer:

Explanation:

What is a free body diagram?

Answer: a force diagram is a graphical illustration used to visualize the applied forces and resulting reactions on a body in a given condition

Drawing a free-body diagram for this problem

Answer: Look at the attached picture, ask me any questions if you are still confused. It is a little messy since I didn't have my pen.

Find its weight on Earth

Answer: The weight is dependent on the mass of the object and the gravitational constant on the planet. The gravitational constant, in this case, is 9.8.

   so the weight = mass * gravitational constant = m * g = 1000 * 9.8

                          = 9800 N

Hope that helps!

Answer:

Explanation:

Given:

F = 300 N

p = 20 N/m²

__________

A - ?

Valid for the area A:

A = F / p

A = 300 / 20 = 15 m²

Answer:

B

Explanation:

While answer C may sound correct, Answer B is makes more sense. We know you cant use High-beam lights when u cant see ongoing traffic because it could affect the other driver coming across from you. Its good to use it when legal and safe, but in that term I still don't believe there's no reason for HIGH-beamed. That's this leaves B, when you are on u lighted streets.

Answer:

I love yourself help yourself

a) Work needed to stretch the spring from 12 m to 14 m is 8 J. b) Force of 64 N will keep the spring stretched by 16 m beyond its natural length.

When spring is stretched or compressed, such that length changes by an amount x from its equilibrium length, then it exerts force F = -kx in a direction towards its equilibrium position.

(a) Potential energy, U = (1/2)kx^2

k is spring constant, and x is displacement from natural length of spring.

W = U = (1/2)k(9-6)^2 = (1/2)k(3)^2 = (9/2)k

Therefore, k = (2/9)W = (2/9)(18 J) = 4 J/m.

W = (1/2)k(14-12)^2 = (1/2)(4 J/m)(2 m)^2 = 8 J

So the work needed to stretch the spring from 12 m to 14 m is 8 J.

(b)F = kx

F is force, k is spring constant, and x is displacement from the natural length of spring.

x = F/k = 64 N / 4 J/m = 16 m

Therefore, a force of 64 N will keep the spring stretched by 16 m beyond its natural length.

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Answer:

Hertz is the answer for this question

The Rigel is more warmer and brighter as compared to the sun due to its high temperature.

The Rigel is more warmer and brighter as compared to the sun due to its high temperature and its brightness is about 47,000 times more than that of the Sun. Because of its high temperature, the Rigel is white as compared to the sun.

So we can conclude that the Rigel is more warmer and brighter as compared to the sun due to its high temperature.

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The mass of the rock is approximately 86.304 tons.

To convert the mass of the rock from grams to tons, we can use the conversion factor that 1 ton is equal to 907.2 kilograms.

Mass of the rock = 7.84 x 10^7 grams

To convert grams to kilograms, we divide by 1000:

Mass in kilograms = (7.84 x 10^7 grams) / 1000 = 7.84 x 10^4 kilograms

Now, to convert kilograms to tons, we divide by 907.2:

Mass in tons = (7.84 x 10^4 kilograms) / 907.2 = 86.304 tons

Therefore, the mass of the rock is approximately 86.304 tons.

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Answer:

Effort=300N

Load=900N

Load distance=20m

Now,

Ed=(L*Ld)/E

Ed=(900*20)/300

Ed=1800/300

Ed=6m

Explanation:

Answer:

This is the correct answer!

Effort=300N

Load=900N

Load distance=20m

Now,

Ed=(L*Ld)/E

Ed=(900*20)/300

Ed=1800/300

Ed=6m

Hence, the distance from fulcrum to effort is 6 m

Explanation:

Plato

Answer:

Convection cells

Explanation:

As the cold air moves away from poles, it begins to warm up. This warm air now becomes lighter and the pressure drops significantly at 60° N and 60° south latitude. The air from poles further gushes into these belts because the low pressure created. Thus, convection cells are formed because this rise and fall of air in circular pattern.

Hence, the name given is convection cells.

Answer:

32.32857

Explanation:

Searched on the web

a).  frequency = (speed) / (wavelength)

The speed of light is around 3 x 10⁸ m/s.

For 380 nm (violet light), frequency = (3 x 10⁸ m/s) / (380 x 10⁻⁹ m)

Frequency = 7.89 x 10¹⁴ Hz

For 760 nm (red light), frequency = (3 x 10⁸ m/s) / (760 x 10⁻⁹/s)

Frequency = 3.94 x 10¹⁴ Hz

The ratio is 2 .

That's 1 octave, or 0.3 of a decade.

b).  The ratio of highest/lowest sounds is (20,000 Hz/20 Hz) = 1,000

That's 3 decades, or about 10 octaves.

===> Speaking logarithmically ( ! ), ears are sensitive to a range of sound frequencies that's 10 times as wide as the range of light frequencies that eyes can detect.

Answer:

1.07 nT

Explanation:

We know that E/B = c where E = electric field amplitude = 320 mV/m = 0.32 V/m, B = magnetic field amplitude and c = speed of light = 3 × 10⁸ m/s.

So, B = E/c

Substituting E and c into B, we have

B = E/c

= 0.32 V/m ÷ 3 × 10⁸ m/s

= 0.1067 × 10⁻⁸ T

= 1.067 × 10⁻⁹ T

= 1.067 nT

≅ 1.07 nT

Answer:

125 m/s^2

Explanation: