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Contents of the scrotum: Epididymis, Vas deferens, Spermatic cord and Cremaster muscle - Biology

Fun facts in Biology - Biology

Amazing facts on Abraham Lincoln and John Kennedy - History

Functions of the network layer - ICT

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Questions and Answers

A measurement of how much the velocity of an object changes with time is termed _____.

• A. Displacement

• B. Acceleration

• C. Speed

• D. Momentum

• E. Velocity-Time graph

• F. Average velocity

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ANSWER: Acceleration

Acceleration is defined as the rate of change of velocity. Acceleration is also defined as the measurement of how much the velocity of an object changes with time.

• Acceleration = Change in velocity/Change in time

 

If an object changes velocity after a fixed amount of time, then such acceleration is said to be constant (that is: constant acceleration).

 

 

We also have the concept of average acceleration in motion.

Average acceleration is the total change in velocity over a period of time, divided by the duration of that period.

Acceleration is a vector quantity and its Standard International (SI) unit is meter per second (m/s) or meter per second square (m/s²).

Which of the following differentiates velocity from speed?

• A. Distance

• B. Time

• C. Momentum

• D. Inertia

• E. Direction

• F. Distance and Time

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ANSWER: Direction

The direction in which an object is moving is what differentiates velocity from speed. In short, velocity is defined as speed in a given direction. It is also defined as the rate of change of displacement.

Please read more on velocity and acceleration here

F_A = -F_B

F_A is the action force while F_B is the reaction force.

The above statement expresses _____.

• A. Force and Acceleration

• B. Force and Gravity

• C. Force and Momentum

• D. Newton's first law of motion

• E. Newton's second law of motion

• F. Newton's third law of motion

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ANSWER: Newton's third law of motion

Newton's third law states that action and reaction are equal and opposite.

According to the third law of motion, if a body 'A' exerts a force F_A on another body 'B', body B will in return exert an equal and opposite force F_B on body A. The forces F_A and F_B are therefore equal in magnitude but opposite in direction.

Please read more on Newton's laws of motion here

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Facts for Students

Cockroach is the fastest land animal on six legs

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Like humans, all apes laugh when tickled

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Antibiotics fights and kills bacteria. However, they do nothing to a virus

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The longest street in the world is Yonge street in Toronto Canada. It has a length of 1,895,807.232 meters or 1,178 miles

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The only English word with five consecutive vowels is 'queueing'

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Quotes for Students

The first problem for all of us, men and women, is not to learn, but to unlearn - Gloria Steinem

The act of unlearning is an excellent form of learning. Infact, you will need the skills of unlearning if you intend to become an expert in your desired field.

Do yourself a favor by unlearning, learning and re-learning on a daily basis

If you don't design your own life plan, chances are you'll fall into someone else's plan. And guess what they have planned for you? Not much - Jim Rohn

There's something special about you. It doesn't matter whether you work for a company or someone; what matters is the amount of investment you've made on yourself.

Investing in yourself is the best life plan you can design for your future

Peace begins with a smile - Mother Teresa

Never underestimate the power of your smile. It can lift up the depressed, improve the mood of the downtrodden and even discourage a suicidal attack. Also remember that your smile makes you more beautiful

Smile always for your own good and the good of others

The only person who is educated is the one who has learned how to learn …and change - Carl Rogers

To perfect your learning process, you must learn, unlearn and re-learn. Infact, we all need to learn how to unlearn those vices we know about ourselves.

Do you know that seeing the devastating consequences of vices (perhaps in movies or real-life) can initiate the unlearning processes in one who does such?

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key points for Students

God created human beings for the following reasons:

1. To know Him

2. To love Him

3. To serve Him

4. To be happy with Him forever

Our first parent, Adam and Eve enjoyed a life of complete happiness before they committed sin. They never knew what pain nor sorrow was until they disobeyed God. In short, both were perfect beings until they committed the sin of disobedience against God.

Disobedience may simple be defined as the failure to obey rules, command or someone in authority.

Adam and Eve were the first human beings to disobey God.

Please read more on the biblical account of first human disobedience here

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Adam and Eve were able to commit sin (disobey God's command) because God had given them that special gift of free will.

The events written in Genesis 3:1-13 presents the story of the first human disobedience.

Now the snake was the most cunning animal that the Lord God had made. The snake asked the woman, 'Did God really tell you not to eat fruit from any tree in the garden?'

Genesis 3:1

Moral Lesson: The devil can come in any form and can tempt any man, woman, boy or girl, as far as he or she is of the age of reasoning.

Sometimes, satan creeps into one's life by asking simple questions. Notice that the snake (satan) did exactly this when it approached Eve to tempt her. To this end, we need to be at alert prayerfully because the evil one can tempt any human in any situation, place and at any point in time

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Computer hardware is the collection of physical parts of a computer system.

Physical parts of a computer are those parts that you can see and touch. It may also be referred to as the 'equipment of the computer'.

When the computer case is opened (with a screwdriver), one would see the different hardware components inside of it. It's important to state that some other hardware components are present outside the computer case; and these are termed peripherals.

Below are hardware components seen inside the computer case:

• Motherboard

• Central Processing Unit (CPU)

• Graphics Processing Unit (GPU)

• Power supply Unit (PSU)

• Northbridge

• Southbridge

• Peripheral Component Interconnect (PCI) slots

• Network Interface Card (NIC)

• Random Access Memory (RAM)

• Ventilation fans

• Heat sink

• Hard Disc Drive (external present)

• Solid State Drive (SSD)

• CMOS battery

• Optical Disc Drives (external present)

• USB port, PS2 port, Ethernet port and other ports

• Expansion Ports / Slots

Please read more on computer hardware here

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