Recent content by nyrychvantel

Must we use LateX? Can't we switch to other language such as Wikipedia's one? Well i notice some restrictions in LateX, firstly, the mathematics symbols are sometimes too small and may cause confusion, such as this, \mathop {\lim }\limits_{x \to \infty } \sum\limits_{x = 1}^N {\left(...

For x|x - 2| \ge 1, since |x - 2| \ge 0, and for x|x - 2| \ge 1, so x > 0 Since x > 0, can I multiply the x inside to make it |{x^2} - 2x| \ge 1 ?? Or can you teach me your method of solving this question? Thanks.

Thank you so much! I understand now.

Distance btw dots are 2cm, btw, do you count the first dot as zero? because I counted there are 11 dots for the 20cm. Also, do you mean 'divide' by dots per second instead of multiply, because I could not get the answer if I multiply it. 1 dot = 1/50 s 10 dot = 1/5s s= d/t s= 20/(1/5)...

1. The diagram shows a strip of paper tape that has been pulled under a vibrating arm by an object moving at constant speed. The arm is vibrating regularly, making 50 dots per second. What was the speed of the object? A. 2.0cm/s B. 5.0cm/s C. 100cm/s D. 200cm/s Completely clueless...

A diagram shows many very small dust particles suspended in the gas in a closed transparent glass. Question: Explain why dust particles stay suspended in the gas and do not fall to the bottom of the syringe. My answer: Dust particles are constantly being bombarded by free moving gas...

Erm...then how do you determine whether the tangent is a horizontal or vertical? I'm not sure I could convince my examiner without any mathematical proof... I get what you mean! thanks! I suddenly notice I can break it down by partial fraction. I've never learned substitution method to...

1. A curve passes through the point (\pi/2 , 0) and it's gradient at any point (x,y) on the curve is (sin x)(1 - sin x), find the equation of the normal to the curve at the point x = \pi. I tried to sub x = \pi, then dy/dx = 0 so that means gradient of the tangent at x = \pi is 0 So, can I...

thanks for pointing out my mistake, so does it mean that if an object is traveling upward with certain velocity, and is suddenly released, it doesn't obey the normal free-fall rule? (assume air resistance is neglected)

please correct me if I'm incorrect, this is just my attempt.. dist. traveled by the elevator the moment the ball falls = dist. traveled by the ball when it hits the ground Since the ball takes 4.5 seconds to reach the ground, under the effect of gravity, the ball would have traveled 1/2 * a *...

Thank you! I forgot I can use area under a V-T graph of constant acceleration (and sub v=at) to get the total distance traveled by car Q.

Homework Statement Two cars, P and Q, are 1400m apart. P is traveling at 15 ms-1, Q is accelerating from rest at 5.0 ms-2 They are traveling opposite direction(i.e. they are facing each other), what is the time taken for them to meet? Also, what is the distance traveled by each car before...

I often read about how electrolyte conduct electricity, the websites I searched often explain only in terms of mobile ions are able to move freely in the solution, therefore they could carry charges throughout the solution bla bla bla. However, none of them explain how does that help conduct...

I am new to the concepts of reaction between of Acids, Bases and Salts. While learning, I notice that some salts react with acids to form a new salt (and sometimes a new acid is produced), especially in Qualitative Analysis, while some don't even reacts. I tried to search the internet about it...