A bomb explodes on the moon. You will hear its sound on earth after – (1) 20 minutes (2) 2 hours 20 minutes (3) 3.7 hours (4) You cannot hear the sound of explosion

A bomb explodes on the moon. You will hear its sound on earth after – (1) 20 minutes (2) 2 hours 20 minutes (3) 3.7 hours (4) You cannot hear the sound of explosion
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(4) You cannot hear the sound of explosion Explanation: The sound will never reach Earth because there are not enough molecules or atoms of matter per cubic centimeter of space to create the pressure waves in a medium that is a sound wave. In simple words, Sound propagation needs a medium. The people on the Earth can see the flash, but no sound.
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A bomb explodes on the moon. You will hear its sound on earth after ______ (1) 20 minutes (2) 2 hours 20 minutes (3) 3.7 hours (4) You cannot hear the sound of explosion

Description : A bomb explodes on the moon. You will hear its sound on earth after ______ (1) 20 minutes (2) 2 hours 20 minutes (3) 3.7 hours (4) You cannot hear the sound of explosion

Last Answer : You cannot hear the sound of explosion

A bomb explodes on the moon. You will hear its sound on earth after ___

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A bomb explodes on the Moon. How long will it take for the sound to reach the Earth? (a) 10 s (b) 1,000 s (c) 1 day (d) None of these

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There are 10 bombs on the ground, 1 bomb explodes. How many bombs are there left? -Riddles

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Last Answer : Ans:(a)

There is a bomb on top of a computer. Around the computer there is a phone, a hairbrush, keys and a cup. When the explosion comes which item is destroyed first? -Riddles

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Last Answer : The bomb.

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The enormous amount of energy released in an explosion of an atomic bomb is due to the - (1) conversion of mass into energy (2) conversion of chemical energy into heat energy (3) conversion of mechnical energy into nuclear energy (4) conversion of neutrons into protons

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Last Answer :  conversion of neutrons into protons

Human beings can hear the sound range between: (1) 10 to 20 decibels (2) 100 to 150 decibels (3) 50 to 60 decibels (4) None of the above

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Why can't you hear any sound on the moon ?

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Ravi walks to and fro to a Gym. He spends 30 minutes in gym. If he walks at speed of 20 km an hour, he returns to home at 8.00 a.m. If he walks at 30 km an hour, he returns to home at 7.30 a.m. How fast must he walk in order to return at 7.15 hours? a) 40 km/hr b) 30 km/hr c) 60 km/hr d) 50 km/hr

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Last Answer : C In 1 hr P, Q, R = 1/3+1/4+1/5 = 20+15+12/60 = 47/60 Filled in 30m = 47/120 Remaining = 1-47/120 =73/120 Tap P = 3*73/120= 219/120 Total = 219/120+1/2 =219+60 /120= 279/120= 2 13/40 hrs

These two chemical elements, named after two world-renowned scientists, were first formed in a thermonuclear explosion which occurred in the South Pacific in 1952. The atomic numbers of these elements are 99 and 100. Their chemical symbols are Es and Fm. Name these elements.

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Last Answer : ANSWER: EINSTEINIUM AND FERMIUM

what happens when black mushrooms explodes

Description : what happens when black mushrooms explodes

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I am a food that explodes. But long before I explode, I am already dead. I can be small, I can be big, and I can be fragrant. My name is literal. What am I? -Riddles

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What is it called when an aging star explodes? -Space

Description : What is it called when an aging star explodes? -Space

Last Answer : when aging star explodes i think it is called supernovae.

A spring ball of mass 0.5 kg is dropped from some height. On falling freely for 10 s, it explodes into two fragments of mass ratio 1:2.

Description : A spring ball of mass 0.5 kg is dropped from some height. On falling freely for 10 s, it explodes into two fragments of mass ratio 1:2.

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how to make a volcano that explodes real lava?

Description : how to make a volcano that explodes real lava?

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A shell, initially at rest suddenly explodes into two equal fragments A and B. Which one of the following is observed? (a) A and B move in the same direction with the same speed (b) A and B move in the same direction with different speeds (c) A and B move in opposite directions with the same speed (d) A and B move in opposite directions with different speeds

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Last Answer : Ans:(c)

What If Sound travels at a speed of about 760 miles per hour and you are located at a distance of 19 miles from a very loud explosion approximately how long will it take from the time of the explosion?

Description : What If Sound travels at a speed of about 760 miles per hour and you are located at a distance of 19 miles from a very loud explosion approximately how long will it take from the time of the explosion?

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What happens when a drop of glycerol is added to crushed KMnO4 spread on a paper? (1) There is a crackling sound (2) There is a violent explosion (3) There is no reaction (4) The paper ignites

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What happens when a drop of glycerol is added to crushed KMnO4 spread on a paper ? (1) There is a crackling sound. (2) There is a violent explosion. (3) There is no reaction. (4) The paper ignites.

Description : What happens when a drop of glycerol is added to crushed KMnO4 spread on a paper ? (1) There is a crackling sound. (2) There is a violent explosion. (3) There is no reaction. (4) The paper ignites.

Last Answer : There is a violent explosion.

When we hear a sound, we can identify its source from ______. (1) wave length of sound (2) the overtones present in the sound (3) the intensity of sound (4) the amplitude of sound

Description : When we hear a sound, we can identify its source from ______. (1) wave length of sound (2) the overtones present in the sound (3) the intensity of sound (4) the amplitude of sound

Last Answer : (2) the overtones present in the sound Explanation: An overtone is any frequency higher than the fundamental frequency of a sound. Using the model of Fourier analysis, the fundamental and the overtones together are called partials.

Why is the distace between earth and the sun measured in light minutes and the distance between neptune and the sun measured in light hours?

Description : Why is the distace between earth and the sun measured in light minutes and the distance between neptune and the sun measured in light hours?

Last Answer : Because it only takes 8 minutes for sunlight to reach Earth, butit takes 4 hours to reach Neptune.

Why oh WHY was this computer 5 days and 3 hours and 20 minutes off?

Description : Why oh WHY was this computer 5 days and 3 hours and 20 minutes off?

Last Answer : Possible problem with the CMOS battery on the motherboard.

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Description : How many hours and minutes between 10 past 1 and 20 past 6?

Last Answer : Need answer

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Description : From the Survey of India map, the distance of the critical point is 20 km and difference in elevation is 193 m. The over land flow time, is (A) 2 hours (B) 3 hours (C) 2 hours and 30 minutes (D) 4 hours

Last Answer : Answer: Option D

It takes eight hours for a 600 km journey, if 120 km is done by train and the rest by car. It takes 20 minutes more, if 200 km is done by train and the rest by car. The ratio of the speed of the train to that of the cars is? a) 2 : 3 b) 3: 2 c) 3 : 4 d) 4 : 3 e) None of these

Description : It takes eight hours for a 600 km journey, if 120 km is done by train and the rest by car. It takes 20 minutes more, if 200 km is done by train and the rest by car. The ratio of the speed of the train to that of the cars is? a) 2 : 3 b) 3: 2 c) 3 : 4 d) 4 : 3 e) None of these

Last Answer : Let the speed of the train be x km/hr and that of the car be y km/hr. Then, 120/x+480/y= 8 1/x+4/y=1/15 ....(i) And, 200/x+400/y=25/3 1/x+2/y=1/24 ....(ii) Solving (i) and (ii), we get: x = 60 and y = 80. Ratio of speeds = 60 : 80 = 3 : 4. Answer: c)

A Bunker has a leak which would empty the completely filled bunker in 20 hours. If the bunker is full of water and a tap is opened which admits 4 litres of water per minutes in the bunker, how many litres does the bunker holds? A) 2400 B) 4500 C) 4800 D) 7200

Description : A Bunker has a leak which would empty the completely filled bunker in 20 hours. If the bunker is full of water and a tap is opened which admits 4 litres of water per minutes in the bunker, how many litres does the bunker holds? A) 2400 B) 4500 C) 4800 D) 7200

Last Answer : C Leak emptied the bunker per hour = 100/20 = 5% of water per hour; Quantity of water emptied per hour = 4*60 = 240; Thus, 5% = 240 liter; Hence, capacity of water, 100% = 240*100/5= 4800 liter.

Which one of the following animals can hear ultrasonic sound? (1) Rat (2) Squirrel (3) Cat (4) Bat

Description : Which one of the following animals can hear ultrasonic sound? (1) Rat (2) Squirrel (3) Cat (4) Bat

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Two sources of sound placed close to each other, are emitting progressive waves given by y1 = 4 sin 600 t and y2 = 5 sin 608 t. An observer located near these two sources of sound will hear: (1) 4 beats per second with intensity ratio 81 : 1 between waxing and waning (2) 4 beats per second with intensity ratio 25 : 16 between waxing and waning (3) 8 beats per second with intensity ratio 25 : 16 between waxing and waning (4) 8 beats per second with intensity ratio 81 : 1 between waxing and waning

Description : Two sources of sound placed close to each other, are emitting progressive waves given by y1 = 4 sin 600 t and y2 = 5 sin 608 t. An observer located near these two sources of sound will ... between waxing and waning (4) 8 beats per second with intensity ratio 81 : 1 between waxing and waning

Last Answer : (1) 4 beats per second with intensity ratio 81 : 1 between waxing and waning

Which one of the following animals can hear ultrasonic sound ? (1) Rat (2) Squirrel (3) Cat (4) Bat

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Last Answer : Bat

Names of some sleeping pills that are very effective. Playing that will get you sleep in 10-15 minutes and it will last for 7-8 hours ?

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How many minutes are in 4.7 hours?

Description : How many minutes are in 4.7 hours?

Last Answer : 4.7 x 60 = 240 + 42 = 282

If the effective working time is 7 hours and per batch time of concrete is 3 minutes, the output of a concrete mixer of 150 litre capacity, is (A) 15,900 litres (B) 16,900 litres (C) 17,900 litres (D) 18,900 litres

Description : If the effective working time is 7 hours and per batch time of concrete is 3 minutes, the output of a concrete mixer of 150 litre capacity, is (A) 15,900 litres (B) 16,900 litres (C) 17,900 litres (D) 18,900 litres

Last Answer : (D) 18,900 litres

Anand takes 9 hours more than Babu to cover 150 km. Suppose the time taken by Anand is 30 minutes less than Babu he must double his speed. Then the speed of Anand will be: a) 7.64 km/hr. b) 7.43km/hr. c) 7.89 km/hr. d) 7.25 km/hr.

Description : Anand takes 9 hours more than Babu to cover 150 km. Suppose the time taken by Anand is 30 minutes less than Babu he must double his speed. Then the speed of Anand will be: a) 7.64 km/hr. b) 7.43km/hr. c) 7.89 km/hr. d) 7.25 km/hr.

Last Answer : C Let Anand 's speed be X km/hr. And let the time taken by Babu be Y. Since Anand takes 9+Y hours to cross 150km at X km/hr. i.e., 150 / X = 9+Y ---eqn1 And he takes Y - 1/2 hours to cross 150km at 2X km ... )/ 2x = 19/2 150/2X =19/2 150/X = 19 X = 7.89 Hence Anand 's speed is 7.89 km/hr.

Would Quantum Slipstream and the Borg Transwarp Drive be affected by an Omega Particle explosion?

Description : Would Quantum Slipstream and the Borg Transwarp Drive be affected by an Omega Particle explosion?

Last Answer : Both transwarp and quantum slipstream drives operate on the same basic principles as conventional warp drives, and neither bypasses the need to travel through subspace. So presumably they would both be affected ... . The same should also be true for a Xindi energy portal (aka subspace vortex).