Kabir

youre standing on the ground your friend is standing on a balcony of an apartment building 12m above you. you throw a ball straight upward to your friend, it takes 0.536 s to get to her and she catches it when its right in front of her how fast is the bal...

9 years ago

Q. If tossing a fair coin, how many tosses does it take to get two heads in a row, on average? _________________________________________________ I was a bit unsure about what 'on average' meant. I'm a bit unsure about what I tried: I considered cases of g...

8 years ago

There are 3 types of apples in a basket: 7 Red Delicious apples, 8 Gala apples, and 9 Granny Smith apples. Without looking, what is the fewest number of apples you need to take out of the basked to guarantee that you have at least 2 different types of app...

8 years ago

There are 5 Saturdays in February 2020. What day of the week is February 03, 2020? Note: There are 29 days in February 2020. What is the best way to find the answer?

8 years ago

What is table laying and its importance

6 years ago

my thousandth digit is 3 times my hundredth digit. The sum of the tenth digit and unit digit is 1 less than my thousandth digit. My hundreth digit is 2 less than my tenth digit. What four digit I am?

6 years ago

20 60

9 years ago

=> We need to find the total time spent reading the book, so we'll add the times given for each day. => So, we must add the following fractions: 4/5 + 1/6 + 2/5 Fractions can only be added when they all have a common denominator. To make a common denomina...

8 years ago

I feel there's something incorrect with the question; a line segment by definition has two end points. Did you perhaps mean mid-point?

8 years ago

Part 1: Distance => When we talk about distance, we consider the length of the total path travelled. This means, we add up every time the ant goes up 20cm, and crosses the length of 20cm. Since the distance travelled per stair is 40cm (20cm + 20cm), and t...

8 years ago

a) In order to find the ways you can randomly select 4 of them, we use Combinations: C(10,4) = 10!/6!4! = 210 b) Two select in a specific way, we use different combinations for the burnt out and good bulbs, and multiply them: C(7,2) x C(3,2) = 7!/5!2! x 3...

8 years ago

by heating up the milk to high temperatures, in order to kill all bacteria present in it and make it safe to drink. Killing the bacteria also prevents bacterial action and thus preserves milk.

8 years ago

=> The formula regarding the given values is as follows: Force = Mass x Acceleration => So, the acceleration is given by: Force/Mass = 8/2.4 = 3.33 m/s^2

8 years ago

Before the change: Jar A contains 8 red balls and 2 green balls. Jar B contains 6 red balls and 3 green balls. After the change: Jar B contains 6 red balls, 3 green balls, and one ball that has a 1/5 chance of being green and 4/5 chance of being red. So,...

8 years ago

Thanks! This clears it up.

8 years ago

=> First, we calculate the net charge stored in the initial circuit. => Q stored in C1 = CV = 2 x 120 = 240 micro Coul. => Q stored in C2 = CV = 6 x 120 = 720 micro Coul. That gives us a total charge of 960 micro Coul. Try using the following hints now to...

8 years ago

Just to be clear, the point I was making by 'will be in parallel' is that they will have a common potential difference (V). So you have the values of C, a common value for V, and the total value of Q. Can you recall a certain equation which includes C, V,...

8 years ago

=> The commutative property of addition means that the order of things added does not affect the answer. Therefore, a + b = b + a. So, we reverse the order of the two terms in this question. => The associative property of multiplication is that we can gro...

8 years ago

The formula you're going to use for this is as follows: Initial Prize Money x (1 + Fraction of increase)^(ticket number - 1) => I'll represent 60% as 0.6 => So, the answer is 100,000 x (1.60)^6, which you can solve.

8 years ago

I'm sorry, I misread the question as '60% more than the one before it.' The answer above is incorrect, I'll update the answer

8 years ago

Instead of 100,000 x (1.60)^6 It'll be 100,000 x (0.60)^6

8 years ago

Ah, misread the question and then accidentally put a 6 in place of a 5 Thanks for the correction

8 years ago

I believe the major effect would be refraction, I'll put up more once I recall them

8 years ago

=> Using the rotational analogue of the common equation of motion 2as = v^2 - u^2 , we get: 2 x (Ang. Acc) x (Ang. Distance) = (Final Angular Vel.)^2 - (Initial Angular Vel.)^2 => Since it comes to a stop, the Final Ang. Vel. is zero. The intial is given...

8 years ago

Okay, so this answer kind of relates to global warming. Firstly, you should know that the sun releases a lot of heat, and harmful Ultraviolet (UV) rays. This is the 'incoming radiation' in your question. The factors that control it are the amount of ozone...

8 years ago

I hope you're not as confused now :)

8 years ago

a) Here's the theoretical probability, it's the probability that comes up from calculations using known formulae of probability: P(red from all three) = P(red from A)*P(red from B)*P(red from C) P(A) = 3/8 (3 out of 8) P(B) = 4/10 P(C) = 5/12 = (3/8)*(4/1...

8 years ago

=> First, you must note that the number given to you is 45. So, you must find its prime factorisation. 45 = 3 x 15 = 3 x 3 x 5 Since this is the same as the code for Dan, the message is from Dan.

8 years ago

First eight primes -> 2,3,5,7,11,13,17,19 Prime Fac. -> 2 x 3 x 5 x 7 x 11 x 13 x 17 x 19 You can thus find the number

8 years ago

97553 97531 75331

8 years ago

What is the question asking for? Is it the wavelength?

8 years ago

5,000.080

8 years ago

Three significant digits: 5, 8, and the 0 after 8

8 years ago

'C' should be 2.998 x 10^8, shouldn't it?

8 years ago

This means that for x = 3, f(x) = -2/19 So, (2-k)/(5x+k) = -2/19 (2-k)/(15+k) = -2/19 38 - 19k = -30 -2k 68 = 17k k = 68/17 = 4

8 years ago

The total heat energy is the heat energy required to change ice to water, plus the energy to bring water from 0C to 75C. a) Specific latent heat of fusion of water (per kg) = 334kJ Heat required for two kgs = 334 x 2 = 668kJ b) Heat for temp. change = C x...

8 years ago

You haven't put up the options to go with the question, but anything along the lines of 'tail' works. When the ice begins to sublime (change to gases) these gases form a tail like shape away from the comet.

8 years ago

Principal Amount = P = 280,000 Final Amount = F = 386,400 Years = T = 4 Simple Interest = SI = F - P = 106,400 Rate = R SI = P x R x T R = SI/(P x T) = 106,400/(1,120,000) = 0.095 = 9.5% Use that to find the amount per year

8 years ago

C always pairs with G And A always pairs with T So the answer is GAGCT

8 years ago

Total length = 5m = 500 cm Each piece = 500 divided by 8, i cm = 500/8 = 62.5cm

8 years ago

"He must have cut class yesterday" says that he skipped his class on purpose, and did not intend to go to class. "He must have missed the class yesterday" could also mean that he wanted to attend class but couldn't; for example if he could not reach class...

8 years ago

Acceleration = 4.5 m/s^2 = 4.5 x 1m/1sec x 1sec = 4.5 x (100cm)/1sec x 1sec = 450cm/s^2

8 years ago

Math Score = M English Score = X Maths Score = 23 more than (2/3)*X M = (2/3)*X + 23

8 years ago

It's not possible for the difference of two consecutive numbers to be 15, by definition of 'consecutive', the difference is one If, however, the word 'sum' is supposed to be at that place, then the numbers are 7 and 8

8 years ago

501

8 years ago

=> Number of moles of K2O in given sample = Total mass/molar mass = 7.45/(39 + 39 + 16) = 7.45/94 => Number of molecules = Number of moles x Avogadro's Number = (7.45/94) x N => Number of ions = Number of molecules x 3 = (7.45/94) x N x 3

8 years ago

Distance from the ground = s = 10m Acceleration = g = a = 10m/s^2 Initial speed = u = 0m/s (As it is dropped) Using the equation, s = ut + (1/2)at^2, => s = (1/2)at^2 => t^2 = 2 => t = root 2 Use v = u + at for speed

8 years ago

13

8 years ago

Bernoulli's principle The difference in the velocities of the air creates a difference in pressure on both sides of the wing, which is described by Bernoulli's principle.

8 years ago

It is a math problem; not a google problem

8 years ago

huh?

8 years ago

Momemtum = Mass x Velocity = (5 kg) x (10 m/s) = 50 kg.m/s

8 years ago

can you please explain how?

8 years ago

1) You've been given a speed, and a distance, and you must find a time. So first, identify the formula that relates the three, which is: speed x time = distance 2) Taking the unknown time as x (in hours, since the speed is given in hours), plug the values...

8 years ago

Define table laying

6 years ago

thanks you

3 years ago