QUESTION 4.
If
you have 2 randomly selected vectors like R and R;
Show that R. RX 5) = 0
(102)​

Answer:

It's Dynamic Equilibirum

Explanation

Answer:

Image result for Which of the following settings describe a displacement vs time graph that looks like this

Displacement time graph for rest is a straight line with zero slope. Displacement time graph for uniform motion is a straight line with non-zero slope. Displacement time graph for uniform acceleration is a parabola. The three scenarios are shown in the attached plot.

Explanation:

Answer:

I = 1.58 x 10⁻³ watt/m²

Explanation:

Here, we will use the following formula:

\(\beta = 10\ log_{10}(\frac{I}{I_o})\)

where,

β = decibel level = 92 dB

I = Intenisty of sound in watt/m² = ?

I₀ = reference intensity = 10⁻¹² watt/m²

Therefore,

\(92\ dB =10\ log_{10}(\frac{I}{10^{-12}\ watt/m^2} )\\\\\)

\(10^{9.2} = \frac{I}{10^{-12}}\ watt/m^2\\\\I = (1.58\ x\ 10^9)(10^{-12}\ watt/m^2)\)

I = 1.58 x 10⁻³ watt/m²

Work done:-

Now

Apply Newtons second law

m is mass

a is acceleration due to gravity (10)

Given :

A baseball Is traveling with a momentum of 6.5kg m/s.

To Find :

The magnitude of the force stopping it If it gets stopped in 0.020 s.

Solution :

We know, force in terms of magnitude is given by :

\(Force = \dfrac{Momentum}{Time\ Taken}\\\\Force = \dfrac{6.5 \ kg\ m/s}{0.020\ s}\\\\Force = 325 \ kg \ m/s^2\)

Therefore, the magnitude of the force stopping it is 325 kg m/s² .

I believe that it would take 30 seconds, as he accelerates at 10 m/s and 10 x 30 = 300

hope this helps! good luck :)

Answer:

Birds and fish both have a backbone structure, which makes them structurally and functionally similar.

Explanation:

The statement is false

The stronger the electron’s energy, the higher the primary quantum number. As a result, the electron’s energy level is determined by the primary quantum number. The form of the electron wave is determined by the azimuthal quantum number, l. The electron sublevels are also known as l values.

The energy level of an electron in an atom is represented by the primary quantum number. It is responsible for determining the size and energy of an atomic orbital. The greater the value of the primary quantum number, the larger the size of the atomic orbital and the higher the energy level. When the value of the primary quantum number rises, the difference in energy falls.

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a) The average density of the block can be calculated using the formula for density.Since the mass of the block is 1.80 N and the volume is 2.0 × 10∧5 \(m^{3}\), the average density is 0.9 kg/\(m^{3}\).

Mass is a measure of the amount of matter contained in an object. It is a fundamental physical property that is commonly used to measure the size of objects. Mass is usually measured in grams (g) or kilograms (kg) but can also be measured in other units such as ounces, pounds and tons. Mass is different from weight, which is a measure of the force of gravity on an object.

b) The normal force the floor of the vessel exerts on the submerged body can be calculated using the formula for buoyancy. In this case, the normal force is equal to 1000 kg/\(m^{3}\) × 2.0 × 10∧5 \(m^{3}\)× 9.81 m/\(s^{3}\), which is equal to 1.962× 10∧8 N.

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Answer:

Explanation:

Answer:

True

Explanation:

When it's turn off, chemical energy is stored (the battery) in the flashlight, when it's turn on the chemical energy transfers into light and thermal energy.

From the histogram given, there were at approximately 7 downloads between 3pm and 4pm . This can be derived by counting the rows in that time period.

A histogram is a graph that depicts the frequency distribution of a few data points from a single variable.

Histograms frequently divide data into "bins" or "range groups" and count the number of data points that belong to each of those bins.

Histograms are frequently used to depict the key properties of data distribution in a handy format. It is especially beneficial when working with huge data sets (more than 100 observations). It can aid in the detection of uncommon observations (outliers) or gaps in the data.2

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The traffic cop needs 23.3 seconds to pass the automobile.

When your velocity (not speed) changes, you are accelerating. A automobile moving at a steady 100 km/h in a straight line has no acceleration. Average acceleration is equal to (change in velocity) / (duration). The car's acceleration is zero because its change in velocity is also zero.

\(d1 = v1*t1 = 35.0 m/s * 1 s = 35.0 m\)

\(d = d1 = 35.0 m\)

\(d2 = v2*t + (1/2)at^2\)

\(d2 = (1/2)at^2\)

\(v2*t + (1/2)at^2 = (1/2)at^2\)

\(v2*t = (1/2)at^2\)

Solving for t, we get:

\(t = (2v2/a) = (235.0 m/s)/3.0 m/s^2 = 23.3 s\) (rounded to 2 decimal places)

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The Title of the interviews Questionnaire is : Community Members' Right to Safe and Healthy Living Questionnaire. The Questionnaire is attached.

A tool for research known as a questionnaire comprises a series of questions formulated to extract data from individuals or a collective of individuals. A systematic approach in acquiring data, which permits researchers to obtain uniform feedback and perspectives from respondents, is termed as structured data collection.

Questionnaires have multiple applications such as conducting surveys, holding interviews, performing assessments, and carrying out evaluations.

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12. The time taken for the journey is 400 s

13. The time taken for the train is 200 s

14. The time taken is 7 h

15. The time taken for the beetle is 12 s

16. The time taken for the journey is 0.0068 h

The time taken in each case as given by the question can be obtain as follow:

12. The time taken for the journey

Time taken = Distance / Speed

Time taken = 26000 / 65

Time taken = 400 s

13. The time taken for the train

Time taken = Distance / Speed

Time taken = 3200 / 16

Time taken = 200 s

14. The time taken to travel

Time taken = Distance / Speed

Time taken = 672 / 96

Time taken = 7 h

15. The time taken for the beetle

Time taken = Distance / Speed

Time taken = 1.08 / 0.09

Time taken = 12 s

16. The time taken for the journey

Time taken = Distance / Speed

Time taken = 35 / 5147

Time taken = 0.0068 h

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Answer:

The precision corresponds to the least count of the measurements, which is 0.1 cm 0.1 c m for the length of the box. In a similar manner, the precision of the volume is 0.01×103 cm3=10 cm3 0.01 × 10 3 c m 3 = 10 c m 3 .

Answer:

the wavelength will decrease

Explanation:

If the frequency of a wave increases, the wavelength will decrease. This is because the speed of the wave is constant for a given medium, so if the frequency (the number of waves passing a fixed point per second) increases, then the distance between successive wave crests (i.e., the wavelength) must decrease to maintain a constant speed. This relationship is described by the wave equation:

v = f λ

where v is the speed of the wave, f is the frequency, and λ is the wavelength. If v is constant and f increases, then λ must decrease to keep the equation balanced.

Answer:

5.3 m

Explanation:

Your friend is 1800 mm tall, and you want them to fill half the frame (79 mm / 2 = 39.5 mm).

The film is 116 mm behind the lens.  Using similar triangles:

x / 1800 = 116 / 39.5

x = 5286

Rounded to two significant figures, your friend should stand 5.3 meters away.

Answer:

First, find the maximum height, which according to the values given, can be stated as:

H=(u²sin²theta)/2g

u=15m/s, theta=25 degrees, g=9.8m/s²

H= (15² * (sin 25)²))/2*9.8

H= (225*0.179)/19.6

H= 40.275/19.6

=2.06m

To find the velocity at maximum height:

Use the formula

v²=u²-2gH

It's minus because the brick was thrown upwards

So plugging everything into the above formula:

v²=15²-2*9.8*2.06

v²=225–40.376

v²=184.624

v=√184.624

v=13.59m/s

Answer:

The six steps of the scientific method include:

1) asking a question about something you observe

2) doing background research to learn what is already known about the topic, 3) constructing a hypothesis,

4) experimenting to test the hypothesis,

5) analyzing the data from the experiment and drawing conclusions,

6) communicating the results to others.

I hope this helps :)

Hello!!

For calculate the work let's applicate the formula:

\(\boxed{W=Fd}\)

\(\textbf{Being:}\)

\(\sqrt{}\) W = Work = ?

\(\sqrt{}\) F = Force = 1525 N

\(\sqrt{}\) d = Distance = 381 m

⇒ \(\text{Then let's \textbf{replace it according} we information:}\)

W = 1525 N * 381 m

⇒ \(\text{Let's resolve it: }\)

W = 581025 J

\(\textbf{Result:}\\\text{The work is \textbf{581025 Joules}}\)

Work done on an object is the product of force and displacement. The work done on the car by the force of 1525 N making a displacement of 381 m is 581 KJ.

When a force applied to an object make a displacement of  the body or stopes its motion, the force is said to be work done on the object. Thus, work done can be taken as the product of force and displacement.

Work done like force is a vector quantity thus characterized with magnitude and direction.  Work done is equivalent to the energy required to make the object displaced.

Given the force = 1525 N

displacement = 381 m

work done  = force × displacement

w = 1525 N × 381 m = 581 KJ.

Therefore, the work done on the car is 581 KJ.

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The answer is 1) The pressure at point D is 80 kPa. 2) The temperature at point D is 800 K. 3) The net work done on the gas over four cycles is zero. 4) The internal energy of the gas at point A is 100 J. 5) The total change in internal energy during four complete cycles is zero.

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First, let's draw a diagram representing the distances:

a)

To calculate the straight line distance, let's use the law of cosines, using the interior angle adjacent to the angle 25°, that is, an angle of 155°:

b)

Now, to find the direction, first let's decompose the 280 vector in horizontal and vertical components:

Now, let's add the horizontal component with the 200 vector, then calculate the angle of the resulting vector:

c)

The answer is approximately correct because the sine and cosine values used to calculate are not exact values, they are rounded values. Therefore the final result will not be 100% accurate.

Answer: 10,000 NN

Explanation:

F =ma

F = 1000kg(10m/s²)

F =10,000 N

Answer:

Vygotsky's sociocultural theory asserts that learning is an essentially social process in which the support of parents, caregivers, peers and the wider society and culture plays a crucial role in the development of higher psychological functions.

Thus,  Vygotsky believed that children were more dependent learners

Any moving object has momentum. The momentum of an 11 kg bowling ball rolling at 4 m/s is 44 kg m/s.

The momentum is defined as a quantity which is the product of the mass of the particles and its velocity. It is a vector quantity. It has both magnitude and direction. The rate of change of momentum is equal to the force acting on the particle.

The equation of the momentum is given as:

p = mν

= 11 kg × 4 m/s

= 44 kg m/s

Thus the momentum of the bowling ball is 44 kg m/s.

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