Back to the future part 4
Maybe you have thought why wheels sometimes appear to spin backward. This is so called the stroboscopic effect. Of course, […]
Category: Education
Gravity and attractive force
What we feel on the earth is the composition of the gravitational acceleration and centrifugal action of earth’s rotation. The […]
Resistors, battery, and power dissipated!!
Quiz: There is a circuit with a battery and a resistor, R. The original voltage of the battery is V […]
What is horse power?
Power is energy per unit time. That’s the efficiency of work. Now here is a question. Which horse power is […]
Physics of rainbow
A rainbow appears in the heavens opposite to the sun and it is caused by the refraction and reflection of the sun’s rays in water droplets. […]
The previous question and its answer: What is the area covered with squares?
Question: What is the area covered by three squares? Answer: You can use simultaneous equations to solve it, but there […]
Can you solve this problem? (The area of squares)
In the picture, there are three squares. Each size of square is different, and the they are aligned as shown. […]
Do you know Pell’s equation?
An indeterminate equation is an equation that has more than one solutions. Pell’s equation is one of them that is […]
Need physics help?
Hi there! Are you taking introductory physics courses? Are you doing well in the class? Do you need any help […]