Easy science riddles

Can you guess the scientist name from the picture rebus below?

Dalton was working in his chemistry lab and created a mixture whose weight is contributed by 90% water and 10% Carbon. The weight of the mixture is 20pounds. As he just finished creating the mixture, Dalton needs to go urgently for some urgent work for 2days. When he returned, the weight of water in the mixture was reduced from 90% to 50%.
How much does the mixture weigh now?

We have two identical balls in terms of diameter and weight. However, one of them is solid and the other is hollow.
Without knocking the ball, can you find the solid ball?

Astrology starts with the alphabet A.
Biology starts with the alphabet B.
Limnology starts with the alphabet L.
Can you find an ‘ology’ that begins with a P?

I am a son of a chemist and a mathematician.
People called me Iron59.
What’s my name?

You are served a hot cup of coffee and room-temperature cream at a restaurant. You want to wait a few minutes before you drink the coffee, and you want it to be as hot as possible when you drink it. Should you pour the cream in the coffee:

a) Immediately
b) Just before you drink it
c) It doesn’t matter

This is a classic barrel riddle.
You know the barrel is approximately half filled with oil but you are not sure how fill is the barrel is.

How can you check if its
1. Exactly Half filled
2. > Half Filled
3. < Half Filled.

Show Answer

As shown in the picture below, you should tilt the barrel so the liquid will touch the upper end of the barrel. So if the bottom part of the barrel is visible then it’s not half full.

It is the son of the water but when the son returns to parent, it dies.
What is it?

A farmer wanted to sell watermelons in the city. To reach the city, he had to cross a river. So, he embarked on the journey while it was raining. On the way, he felt hungry and thus ate one of the watermelons. Further on a certain distance, he came across a Shark. In order to save himself, he hit the shark with the watermelon.
At this point of time, can you find out if there is any change in the water level?

As shown in picture, there are four gears with the following specification
* Gear A has 60 teeth
* Gear B has 40 teeth
* Gear C has 20 teeth
* Gear D has 60 teeth
* Every minute, Gear B makes 15 complete turns.

What is the relative speed of Gear A and Gear B?

I am somewhere, where if i stand up straight, i might be considered sideways ?

32 D F at which W F.

You have a broom which you balance on your finger keeping your finger exactly on the broom’s center of gravity. You mark that point with the help of a marker. Now you cut the broom from there and are left with two different pieces one of which is longer than the other. The longer piece has the handle part whereas the shorter one comprises of bristles and some party of the handle.

Now, if you weigh the two pieces, which one of them will weigh more?

You are lying on a beach with a wine bottle enjoying the bright sun. After it goes empty, you friend secures the mouth of the bottle with a cork. You can see a metal ring inside the bottle that has been suspended by a string.

He asks you if you can think of any way to drop the metal ring inside the bottle without touching the bottle or the cork. Can you think of any way?

AS you can see the picture, all you have to do is analyze it and tell who all from the pictured people will die if the person at E pushes the round object to the slide on the slope. Keep in mind all the physics and the terrain while you analyze the things.

Show Answer

If you notice the animated gif, you know that D, C and B are going to die. D dies directly after coming in contact with the object, C dies after being thrust by the spikes of the see-saw and B dies with the blue ball.

But consider the situation that the person at E stands for Ebola. Eventually A dies as well.

We thank 9gags for this awesome gif.

A man is trapped on a frozen lake in an isolated region. The frozen surface is frictionless and no grip of any kind can be attained over it. He just has a mobile phone in his pocket but when he takes it out to call for help, he finds out that there is no reception.

There is no wind force that may help him in escaping. What will he do to escape the lake and save himself from freezing to death?

You are given two metal rods and then taken into a room. You are left there to identify which one of the metal rods you have is a magnet. Now you have no other metal object in the room with you. Also, the two rods are exactly similar to each other in looks.

What method will you use to determine which one of the rods is actually a magnet ?

You are given a ball and you are asked to throw it as hard as you can but it must return back to you. It is an open ground and you can’t find any wall or object in your vicinity. There is no one around to catch your ball and throw it back to you. Also, you can’t attach any string or rope with the ball.

How will you achieve it then?

One or Two ?

Note: The gears in contact will be going to rotate in the opposite direction.

There is a place on earth where the wind blows north and then suddenly towards the south. It happens all the time.

Do you know where this place is?

On a boat, there is a 15 inch brick of gold and a 15 inch brick of iron. If both of them are dropped into the water, which one of them will make the water level higher?

Suppose there are two cogwheels in a box. The bigger wheel has twenty four teeth while the smaller one has eight. The bigger one is firmly attached on the center of the box (so it can’t turn or move) and the smaller one rotates around it.

Can you tell the number of times it will turn around the big one when comparing with the box when it turns once?

Pedro Rodrigues killed Density x Volume.

Who is Pedro Rodrigues ?

Assume a situation. There is an earthquake which is one point higher on the Richter scale than another earthquake which is ten times powerful. Now how much powerful do you think the earthquake will be if it was just 1/2 a point higher on the Richter scale?

How come the second man dies ?

Identify Me
I am a god
I am a planet
I am a measure of heat.

When deepak was six years old he hammered a nail into his favorite tree to mark his height.
Five years later at age eleven , deepak returned to see how much higher the nail was.
If the tree grew by ten inches each year, how much higher would the nail be?

Suppose we drop
1. A 50 kg metal ball
and
2. A 40 kg ball of silk
from a height of 100 meters.

which will reach the ground first ?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

What’s the next in the sequence ?

Agarkar was going to bleach his socks because they had gotten muddy the day before.
As he was pouring the bleach into the washing machine, he spilled some on the floor.

He got some cleaning fluid and mopped it up with a rag.

Minutes later Agarkar was dead.

What killed Agarkar ?