# Search results

1. ### Chemistry is a mystery!

I can't bring myself to like this subject. And I can't do my desired course without being good at it. Its like one information after the other and some things make no sense and too many exceptions. :cry: If there's someone out there who likes chemistry, then please tell me what about this...
2. ### Does photorespiration help avoid photorespiration?

In C3 plants, RuBisCO acts as an oxygenase when CO2 concentration is below a certain value. As a result, a process called photorespiration takes place. Photorespiration leads to the formation of toxic ammonia and CO2. Moreover, it uses up ATP and don't form glucose. So its considered a wasteful...
3. ### Derivatives and Integrals

Okay, so is there a relation betwwen the slope of curve and area under curve (if there is one, I mean)? I'm pretty confused here.:uhh:
4. ### Probability all balls are white.

Homework Statement A bag contains 4 balls. Two balls are drawn at random, and are found to be white. What is the probability that all balls are white? 2. Relevent equations At school, I'm currently learning Bayes' theorem, probability disribution and Bernoulli trials. The Attempt at a...
5. ### Time taken for body under free fall

Okay. So y=yo+ut-gt2/2 0=45-30t-5t2 t=1.242s
6. ### Time taken for body under free fall

If the origin is on the ground, the distance (which is above the origin) will be positive, right?
7. ### Time taken for body under free fall

Homework Statement A ball is dropped from the top of a cliff. If time taken for half of the descent is 3s, then what is the time taken for the rest of rest of the descent? Take g=10m/s2 Homework Equations T=√(2h/g) v=u-gt s=ut-gt2/2 The Attempt at a Solution T=√(2h/g) h=T2g/2=45m...
8. ### Inheritance: What is the chance of the next calf being amputated

Okay. So the answers are 24, 8, 24 and 16/24=2/3 respectively.
9. ### Inheritance: What is the chance of the next calf being amputated

Answers are 24/32=3/4, 8/32=1/4, 24/32=3/4 and 16/32=1/2 respectively. I hope these are right. I notice that these are the answers I get if the family had only one child.
10. ### Inheritance: What is the chance of the next calf being amputated

If the offsprings did not inherit the bad gene, the probability of getting a dead calf is zero? P=1/2 Correct?
11. ### Inheritance: What is the chance of the next calf being amputated

Is k=2 (since we need two ampuated calves) and n=2 (parents breed two times)? What is the value for p?1/4?:confused: When I substitute these values, I get P=1/16 :smile:
12. ### Inheritance: What is the chance of the next calf being amputated

While having their first child, [favourable outcome (ie., amputated calf)]/[total number of outcomes]=1/4 Same chances with second child. So, the probability of having 2 amputated calves= [total number of favourable outcomes]/[total number of outcomes]=2/8=1/4
13. ### Inheritance: What is the chance of the next calf being amputated

Homework Statement The absence of legs in cattle (amputated) has been attributed to a completly recessive lethal gene. A normal bull is mated with a normal cow and they produce an amputad calf (usually dead at birth). The same parents are mated again. 1) What is the chance of the next calf...
14. ### Some simple doubts

I am starting to get it, I think. Thanks for your replies.
15. ### Some simple doubts

But we can't ever represent i with numbers. I know (-1)^(1/2) is a representation of i. If we are not allowed to use any notations(like root, sigma, integral etc.), what is i? We don't know(or atleast I don't know)! Maybe thats why we call it an imaginary number?
16. ### Living and Non-living

Variations in organisms(which we consider as living forms) occur due to environmental changes, radiations etc. So, they change as they depend on the environment. Can't flames be living, then? What about sterile animals like mules? They don't have the ability to multiply and therefore, cannot...
17. ### Some simple doubts

If x=(-1)^(1/2), we can't know the value of x, can we? That is why we write the answer as i, right? So i is no actual number.
18. ### Living and Non-living

I am not thinking of something like alien species. I meant something that we already know about but haven't categorised it properly. Come to think of it, I think it depends upon how we define life. Would you think the universe as a living entity?

Noodles
20. ### Factors supporting Extinction

Right, thanks! :smile:
21. ### Some simple doubts

What about -15 being the L.C.M. of -3 and -5? Is that correct?
22. ### Factors supporting Extinction

It was given in my school textbook that large body size, small population size, low reproductive rate, feeding at high trophic levels, fixed migratory roots and habitats and localised and narrow range of distribution are the characteristics susceptible to extinction. I don't understand how...
23. ### Living and Non-living

I have learnt in my second grade that all things are categorised into living and non-living things. Living things breathe , grow, reproduce, etc., I don't really remember... and non-living things don't. I was thinking if there was something that isn't living or non-living; something entirely...
24. ### Some simple doubts

If it should be possible, shoudn't the 2 points (real and complex) lie on the same point, same plane? Isn't that necessary? Or is it that the graph I know isn't enough to understand this?
25. ### Some simple doubts

I was thinking whether the real number x could be equal to a complex number y=a+ib, b≠0. When I think graphically, it doesn't seem possible; what with x lying on the x-axis and y lying in the x-y plane. What I essentially meant to ask was that if 11/3=1, ω, ω2, is 1=ω=ω2? In the example...
26. ### Some simple doubts

Can you please give an example. That is what I meant to ask. Is it possible?
27. ### Some simple doubts

If 11/3= 1, ω, ω2, does it mean that for every real number x, ther is a complex number y in the argand plane such that x=y?
28. ### Some simple doubts

I had a few doubts in mind. Please help. 1) Is -15 the L.C.M. of -5 and -3? 2) Can all complex numbers be plotted in a number line. 3) 1^(1/3)= 1, ω, ω^2, where ω= -(1/2)+i[3^(1/2)/2] Then, if we plot these 3 values along a number line, will we get 3 different points or will it...
29. ### Tropical latitudes have remained relatively undisturbed

"Tropical latitudes have remained relatively undisturbed for millions of years. Undisturbance gives enough time for species diversification." I read this in my school textbook. For diversification, shouldn't there be evolution and speciation. And for that shoudn't there be some disturbance...
30. ### Decimal Expansion

I read here in Physics Forums that a number can have more than one decimal expansion. Really? Can someone explain how? Is it that any number can have more than one decimal expansion or only some numbers?