A plane is flying to Minnesota with a velocity of 277.73 km/h, N. The plane
encounters a crosswind with a velocity of 71.97 km/h, W. What is the magnitude of
the resultant velocity of the plane? (Answer in km/h)

Answer:

What is Density? The density of material shows the denseness of that material in a specific given area. A material's density is defined as its mass per unit volume. Density is essentially a measurement of how tightly matter is packed together.

Explanation:

Answer:

 The density of material shows the denseness of that material in a specific given area. A material's density is defined as its mass per unit volume. Density is essentially a measurement of how tightly matter is packed together.

The distance of the bicyclist, travels with a constant speed is 38.4 meter.

Distance - It is the total path travelled.

Time - A period during which an action take place.

speed - It tells about how fast and slow an object moves.

describes distance covered in a given interval of time.

To calculate distance of a bicyclist covered we use

Distance = speed x time

               = 8.00m/s x 4.80s

               = 38.4m

The distance of the bicyclist, travels with a constant speed is 38.4 meter.

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in this experiment selected random people from various age groups and set a certain common rules of driving as judgmental rules and gave a call when they are in drive to check their skills.

When testing a theory, controlled conditions are crucial. When the independent variable in an experiment design is not changed or altered, this is known as a control condition. Because it maintains the driving circumstances uniform, a control condition is essential to this experiment's success in determining if smartphone use affects one's ability to drive. This would enable the only distinction between the test subjects to be the drivers' use of cell phones. Making ensuring the subjects are all travelling the same route and experiencing the same circumstances could serve as the controlled conditions for this experiment. This might be on a closed course where every subject has the same path. All individuals could use the same vehicle as additional controllers.

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The measurement that represents the most accurate data set is second measurement (b. 72, 72, 70, 68, 68).

The average speed of each car in the given data set is calculated as follows;

v(avg) = (70 + 75 + 78 + 77 + 80) / 5

v(avg) = 76 km/h

v(avg) = (72 + 72 + 70 + 68 + 68) / 5

v(avg) = 70 km/h

v(avg) = (73 + 73 + 73 + 73 + 73) / 5

v(avg) = 73 km/h

v(avg) = (70 + 69 + 70 + 70 + 118) / 5

v(avg) = 79.4 km/h

Thus, the measurement that represents the most accurate data set is second measurement (b. 72, 72, 70, 68, 68).

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In scientific notation, the correct format is a x 10ᵇ, where an is an integer or decimal number whose absolute value is more than or equal to one and less than ten, or 1 ≤ |a| ≤ 10. In order for the scientific notation to be mathematically identical to the original number, b must be a power of 10.

For (a),

1 / 0.00032 = ( 1 / 32 × 10⁻⁵ )

1 / 0.00032 = 10⁵ / 32

1 / 0.00032 = 0.03125 × 10⁵

1 / 0.00032 = 3.125 × 10

(b) 10³ / 10⁻³

10³ / 10⁻³ = [ 10³ / (1 / 10³) ]

10³ / 10⁻³ = 10³ × 10³

10³ / 10⁻³ = 1 × 10⁶

(c) 10³ / 10³

10³ / 10³ = 10³ × 10⁻³

10³ / 10³ = 10⁰

10³ / 10³ = 1 × 10⁰

(d) 1/55000

1/55000 = 1 / (55 × 10³)

1/55000 = 0.01818 × 10⁻³

1/55000 = 1.818 × 10⁻⁵

(e) (10⁵)(10⁴)(10⁻⁴) / 10⁻²

(10⁵)(10⁴)(10⁻⁴) / 10⁻² = ( 10⁵ ⁺ ⁴ ⁻ ⁴ ) / 10⁻²

(10⁵)(10⁴)(10⁻⁴) / 10⁻² = ( 10⁵ ) / (1/10²)

(10⁵)(10⁴)(10⁻⁴) / 10⁻² = ( 10⁵) × (10²)

(10⁵)(10⁴)(10⁻⁴) / 10⁻² = 10⁵ ⁺ ²

(10⁵)(10⁴)(10⁻⁴) / 10⁻² = 1 × 10⁷

(f) 43.2 / (4.32 × 10⁻⁵ )

43.2 / (4.32 × 10⁻⁵ ) = 43.2 / (4.32 × 10 × 10⁻⁶ )

43.2 / (4.32 × 10⁻⁵ ) = 43.2 / (43.2 × 10⁻⁶ )

43.2 / (4.32 × 10⁻⁵ ) = 1 / 10⁻⁶

43.2 / (4.32 × 10⁻⁵ ) = 1 / (1/10⁶)

43.2 / (4.32 × 10⁻⁵ ) = 1 × 10⁶

(g) (4.32 × 10⁻⁵ ) / 432

(4.32 × 10⁻⁵ ) / 432 = ( 432 × 10⁻² × 10⁻⁵ ) / 432

(4.32 × 10⁻⁵ ) / 432 = ( 10⁻² × 10⁻⁵ )

(4.32 × 10⁻⁵ ) / 432 = 10⁻²⁻⁵

(4.32 × 10⁻⁵ ) / 432 = 10⁻⁷ = 1 × 10⁻⁷

(h) 1 / (10⁵)(10⁻⁶)

1 / (10⁵)(10⁻⁶) = 1 / ( 10⁵⁻⁶ )

1 / (10⁵)(10⁻⁶) = 1 / 10⁻¹

1 / (10⁵)(10⁻⁶) = 1 / ( 1/10)

1 / (10⁵)(10⁻⁶) = 10

1 / (10⁵)(10⁻⁶) = 1 × 10¹

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The instantaneous velocity at 7s is 1.71 m/sec.

To know the velocity of the position difference,

Use the formula,

speed = distance / time

Given,

distance 1 = -4m

distance 2 = 8m

time = 7s

v = ?

Putting values,

v = Δs/Δt

v = d₂ - d₁ / t

v =  8 - (-4) / 7sec

v =  12m / 7sec

v =  1.71 m/sec

The velocity of a body or object determines the direction of motion. Speed is a scalar quantity in its most fundamental form. Velocity is essentially a vector quantity. It is rate of change in distance. The displacement change rate is the issue.

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The coefficient of kinetic friction between the box and the floor,  μ = 0.1 m/2.

To find out the coefficient of kinetic friction between the box and the floor we will the formula,

μ = F/N

where,

F is friction force

N is normal force

So by question given is mass and acceleration we have to calculate friction force,

So to find F we use,

F = ma

F = 10 x 0.75 m/2

F = 7.5 m/2

By using formula of coefficient of kinetic friction,

μ = F/N

μ = 7.5 / 75

μ = 0.1 m/2

The kinetic friction coefficient (F) is the ratio of the kinetic friction force (F) between both the surfaces in contact during motion to the normal force Ff/N. The static and kinetic coefficients of friction are both affected by the surfaces in contact. Their values are determined through experimentation.

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Red hot is not as hot as blue hot because as the temperature increases the frequencies of light emitted becomes higher leading to emission of smaller wavelength lights.

All objects emits light, even at room temperature. But it cannot be seen with human eyes as the wavelength is too high. When heated the wavelength starts to decrease ( reaching the visible spectrum ) as high heat produce high frequency lights.

The wavelength of colour visible to human eyes starting from highest wavelength to lowest wavelength is as follows: Red, Orange, Yellow, Green, Cyan, Blue and violet.

Therefore, "Red hot" is not as hot as "blue hot"

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Answer:

slowly decreases from left to right over the duration of the element.

The volume has changed by a factor of 4/3

The volume a box will be the product of its length, width and height. The S.I unit is cubic meter (m³)

If the length of a box is reduced to one-third of its original value and the width and height are doubled, by what factor has the volume changed?

Initial volume = LBH

The new volume = L/3 × 2B × 2H

The new volume = 4/3 × LBH

Therefore, the volume has changed by a factor of 4/3

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Matter is the substance which have some mass and can occupy space is well.

Matter is any substance which has mass and occupy some space by having the volume. All physical things are made up of matter and an easily observed property of matter is its state or phase. There are three states of matter Solid, Liquid and Gas. These three matter are responsible for the production of things. The matter can occupy the space but the same matter can not occupy the same space.

The state of a substance directly depends on the balance between kinetic energy of the individual particles and the intermolecular forces between them. If forces are strong, state of matter changes into solid and liquid.

So we can conclude that matter is the substance which have some mass and can occupy space is well.

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