Description : how,he speed of sound is about 3.4 × 102 meters per second. Mark is performing a science experiment and he needs to know how far sound travels in 3 × 1010 seconds. If Mark uses a calculator to solve this problem, how will the calculator show the answer?
Last Answer : 10200000000000
Description : An object travels from a fixed position 5 seconds to start the journey. After 20 m / s. Velocity is. Next 10 sec. How far will it cover ?
Last Answer : The distance covered by the object in the next 10 seconds s = vt s = 20 × 10 = 200m
Description : What is the speed of a rocket that travels 900 meters in 12.12 seconds?
Last Answer : What is the answer ?
Description : How far will a free falling object cover 3 seconds if it travels a distance of 6 seconds 72 meters ?
Last Answer : h = ut + 0.5 * g * t ^ 2 => h = 0 + 0.5 * 9.8 * 3 ^ 2 => h = 44.1 m. 44.1 meters.
Description : what is the speed of a jet airplane that travels 3,000 meters in 10 seconds?
Last Answer : welp
Description : Which has a greater speed, a heron that travels 60 meters in 60 seconds or a duck that travels 60 meters in 5 seconds. Explain?
Last Answer : The heron is traveling 1 meter per second. The duck is traveling 12 meters per second. The duck is traveling faster.
Description : Kishore is travelling on his bike and has calculated to reach point P at 4 pm if he travels at 20 kmph. He will reach there at 12 noon if he travels at 30 kmph. At what speed must he travel to reach P at 2 pm? a) 18 kmph b) 12 kmph c) 24 kmph d) 16 kmph
Last Answer : C Let the distance be x km Travelling at 20 kmph, Kishore will reach point P at 4pm. Travelling at 30 kmph, Kishore will reach point P at 12noon. Therefore, time taken when travelling at 20km - ... his travelling time must be (12-2)=10 hours Hence, required speed =240/10=24 kmph
Description : A 300 metre long train crosses a platform in 39 seconds while it crosses a signal pole in 18 seconds. What is the length of the platform? A.310 m B.350 m C.600 m D.490 m E.None of these
Last Answer : Answer - B (350 m) Explanation - when it cross a pole actually it is crossing itself so, S = 300/18 let length of platform be p relative speed = total lengths/time speed of ... pole,man and other is of considerable length like platform ,bridge. when train crosses pole,man it crosses itself
Description : In a construction site, a crane lifts 1000 kg of concrete mix to roof top at a height of 20 meters in 50 seconds. If the value of gravity 'g' due to earth is 10 m s-2, the power of elevator will be. -Physics
Last Answer : 4 KW (kilowatt)
Description : A 10,000-watt motor operates an elevator weighing 5000 newtons. Assuming no frictional losses, how high is the elevator raised in 10 seconds. Is it raised: w) 2 meters x) 20 meters y) 50 meters z) 100 meters
Last Answer : ANSWER: X -- 20 METERS
Description : A sprinter travels a distance of 200 m in a time of 18.53 seconds.What is the sprinter's average speed rounded to 4 sf?
Last Answer : 5i446
Description : How many yards does 310 feet equal?
Last Answer : 310 - 1 = 309 = 3 x 103103 yards 1 foot
Description : You visit the Grand Canyon and drop a quarter off the edge of a cliff. The quarter falls 16 feet the first second, 48 feet the next second, 80 feet the third second, and so on. If the quarter fell 9 seconds before hitting the ground, how far down is it?
Last Answer : an=a1+(n-1)dan=16+(6-1)32=176The 6th term is 176. Now we are ready to find the sum:
Description : A particle experiences constant acceleration for 20 seconds after starting from rest. If it travels a distance D1 in the first 10 seconds and distance D2 in the next 10 seconds then, (a) D2 = D1 (b) D2 = 2D1 (c) D2 = 3D1 (d) D2 = 4D1 -Science
Last Answer : (c) is the answer
Description : Light waves are different from sound waves in that 1. Light waves are electromagnetic but sound waves are not 2. Light waves can travel through water but sound waves cannot 3. Light travels with the same speed in all media 4. Light ... /are correct? (a) 1 and 5 (b) 2 and 3 (c) 3 and 4 (d) 1 and 4
Last Answer : Ans:(a)
Description : Ganesh is travelling on his motorbike and has calculated to reach golden temple at 8 p.m if he travels at 30 km/hr; he will reach there at 6 p.m if he travels at 45 km/hr. At what speed must he travel to reach the golden temple at 7 p.m? a) 36 b) 46 c) 32 d) 30
Last Answer : A Let the distance travelled be x km x/30 – x/45 = 2 (3x – 2x) / 90 = 2 x/90 = 2 x = 180km Time taken to travel 180 km at 30 km/hr = 180 / 30 = 6 hrs So ganesh started 6 hrs before 8 pm That is 2 pm Required speed = distance / time =(180/5) =36 km/hr
Description : Given below are four statements pertaining to separation of DNA fragments using gel electrophoresis. Identify the incorrect statements. (i) DNA is negatively charged molecule and so it is loaded on gel towards the anode terminal. (ii) DNA ... (iii) (c) (ii), (iii) and (iv) (d) (i), (ii) and (iv)
Last Answer : (d) (i), (ii) and (iv)
Description : If a car travels 6 inches on an Airtrack in .195 seconds what is its average velocity?
Last Answer : Feel Free to Answer
Description : A ball falling vertically from rest for 3 seconds travels very nearly: w) 14.7 meters x) 29.4 meters y) 44.1 meters z) 88.2 meters
Last Answer : ANSWER: Y -- 44.1 METERS
Description : Which of the following statements is true about the illustrated circuit? EL-0030 A. The field rheostat is used for manual voltage control. B. if the generator is flat compounded then the field rheostat ... to act like a series motor and overspeed with the controller in the full raise position.
Last Answer : Answer: A
Description : What is the answer to 0.00274 +.310?
Last Answer : 0.31274
Description : A plane travels from Sydney to Beijing, leaving on Thursday 1:00pm, taking exactly 24hrs to travel. The plane lands at 10:00am. What happened with the plane? -Riddles
Last Answer : Nothing. Beijing is 3hrs behind Sydney.
Description : A metro train 200 metres long takes 12 seconds to cross a man walking at 10 km/hr in a opposite to that of the train. Find the speed of the train? A) 50 km/hr B) 60km/hr C) 130km/hr D) 140km/hr
Last Answer : ANSWER: A Explanation: Length of the train = 200 m Man walking speed = 10 km/hr Let the speed of the train be x' km/hr Speed of the train relative to man = (x +10) km/hr Convert km/hr into m/s ... = 60(x +10) 3600 = 60x +600 60x = 3000 X = 50 So speed of the train is 110km/hr.
Description : A boat travels 20 kms upstream in 6 hours and 18 kms downstream in 4 hours. Find the speed of the boat in still water and the speed of the water current? (a) 1/2 kmph (b) 7/12 kmph (c) 5 kmph (d) none of these
Last Answer : (b) 7/12 kmph
Description : Mike, Jack, and Jim were triplets. When they were ten a mysterious lady gave them each tickets and said they were time tickets good for a round trip to any time and place. Jim immediately used his ... time he goes back exactly 100 years back into the present. Who is the oldest sibling now? -Riddles
Last Answer : Mike, because he went 30 minutes from the past and let time catch up while the others traveled back to the present. Therefore he is older by 30 minutes.
Description : Quantity of fresh air required for a man is _____ A. 1000 cubic feet of air for every 20 minutes B. 1000 cubic feet of air for every 20 seconds C. 1000 cubic feet of air for every 10 minutes D. 1000 cubic feet of air for every 10 seconds
Last Answer : ANSWER: A
Description : Quantity of fresh air required for a man is - (1) 1000 cubic feet of air for every 20 minutes (2) 1000 cubic feet of air for every 20 seconds (3) 1000 cubic feet of air for every 10 minutes (4) 1000 cubic feet of air for every 10 seconds
Last Answer : (1) 1000 cubic feet of air for every 20 minutes Explanation: Breathing sixteen times every minute an average volume of air amounting to 30 cubic inches, we find that the expired air amounts to no less than 17 ... fresh air contains from 0.03 to 0.04 per cent of carbonic acid gas, or at the most, .
Description : What is the time of useful consciousness at 20,000 feet (moderate activity)? a. 5 minutes b. 1 minute c. 10 minutes d. 30 seconds
Last Answer : a. 5 minutes
Description : Quantity of fresh air required for a man is (1) 1000 cubic feet of air for every 20 minutes (2) 1000 cubic feet of air for every 20 seconds (3) 1000 cubic feet of air for every 10 minutes (4) 1000 cubic feet of air for every 10 seconds
Last Answer : 1000 cubic feet of air for every 20 minutes
Description : What has a face, but no head; hands, but no feet; yet travels everywhere and is usually running? -Riddles
Last Answer : A watch.
Description : 3.310 × 10^2 has ___________ significant figures.
Last Answer : 3.310 × 102 has ___________ significant figures. (A) 6 (B) 4 (C) 2 (D) 1
Description : Calculate EOQ (approx.) from the following details: Annual Consumption: 24000 units Ordering cost: Rs. 10 per order Purchase price: Rs. 100 per unitCarrying cost: 5% (a) 310 (b) 400 (c) 290 (d) 300
Last Answer : (a) 310
Description : A camel travels a certain distance each day. Strangely enough, two of its legs travel 30 miles each day and the other two legs travel nearly 31 miles. It would seem that two of the camel's legs ... of course this can't be true. Since the camel is normal, how is this situation possible? -Riddles
Last Answer : The camel operates a mill and travels in a circular clockwise direction. The two outside legs will travel a greater distance than the two inside legs.
Description : A camel travels a certain distance each day. Strangely enough, two of its legs travel 30 miles each day and the other two legs travel nearly 31 miles. It would seem that two of the camel's legs ... but of course this can't be true.Since the camel is normal, how is this situation possible? -Riddles
Description : A horse travels a certain distance each day. Strangely enough, two of its legs travel 30 miles each day and the other two legs travel nearly 31 miles. It would seem that two of the horse's legs must be ... , but of course this can't be true, since the horse is normal. How is this possible? -Riddles
Last Answer : The horse operates a mill and travels in a circular clockwise direction. The two outside legs will travel a greater distance than the two inside legs.
Description : Light travels faster in a material with a lower refractive index. Therefore, light rays that travel a longer distance in a lower refractive index travel at a greater average velocity. What effect does this have on multimode graded-index fiber modal dispersion and bandwidth?
Last Answer : Decreases the time difference between light rays, which reduces modal dispersion and increases fiber bandwidth.
Description : Jackson travels a distance of 100km in 5 hrs. How much faster in kilometer per hr, on an average, must he travel to make a journey in 5/3 hr less time? a) 5 km/hr b) 10km/hr c) 6 km/hr d) 8 km/hr
Last Answer : B Time required = (5 hrs – 5/3 hrs) =(5 hrs – 100 mints) = (5 hrs – 1hr 40 mints) = 3 hrs 20 mints = 3 1/3 hrs Required speed = (100*3/10) km/hr =30 km/hr Original speed = (100/5)km/hr = 20 km/hr Difference speed = required speed – original speed =(30-20) =10km/hr
Description : If A car travels at 60kmhr how far does it travels in 3 and a half hours?
Last Answer : Every hour the car would cover 60 kilometres.Therefore, 60 x 3 = 180 + 30 = 210 kilometres in total.
Description : If a master cylinder with a two-square-inch piston travels 1/2 inch how far would the wheel cylinder with one -square-inch piston be moved?
Last Answer : -1
Description : A block slides down a frictionless incline making an angle ? with an elevator floor. The acceleration relative to the incline will be maximum when a.the elevator ascends at constant speed v b. ... speed v c.107 dynes d.elevator descends with deceleration a e.the elevator descends with acceleration a
Last Answer : d. elevator descends with deceleration a
Description : Two trains are running in opposite directions with the same speed. If the length of each train is 120 metres and they cross each other in 12 seconds, then the speed of each train (in km/hr) is: A.12 kmph B.24 kmph C.36 kmph D.48 kmph E.None of these
Last Answer : Answer – C (36 kmph) Explanation – Let the speed of each train be x m/sec. Then, relative speed of the two trains = 2x m/sec. So, 2x = (120 + 120)/12 ⇔ 2x = 20 ⇔ x = 10. ∴ Speed of each train = 10 m/sec = [10 x 18/5] km/hr = 36 km/hr
Description : While traveling in a straight line, a car uniformly changes its speed from 50 kilometers per hour to 110 kilometers per hour in 5 seconds. The acceleration of the car during this time is: w) 5 ... per hour per second y) 50 kilometers per hour per second z) 60 kilometers per hour per second
Last Answer : ANSWER: X -- 12 KILOMETERS PER HOUR PER SECOND
Description : The refractive indices of four media A, B, C and D are given in the following table: light-reflection-and-refraction-chapter-wise-important-questions-class-10-science-9 If light, travels from one medium to another, in which case the change in speed will be (i) minimum, (ii) maximum? -Physics
Last Answer : (i) Minimum change is seen as light moves between 1.50 and 1.52, i.e. B and C. (ii) Maximum change when light moves between 1.33 and 2.40, i.e. A and D.
Description : Two stations X and Y are 170 km apart on a straight line. One train starts from X at 6 a.m. and travels towards Y at 25 kmph. Another train starts from Y at 8 a.m. and travels towards X at a speed of 35 kmph. At what time will they meet? a) 11. 30 a.m b) 10.30 a.m c) 11 a.m d) 9 a.m e) 10 am
Last Answer : e Suppose they meet z hours after 6 a.m. Distance covered by X in z hours = 25× z km. Distance covered by Y in (z - 2) hours = 35(z - 2) km. Therefore 25z + 35(z- 2) = 170 60z = 240 x = 4. So, they meet at 10 a.m.
Description : A train locomotive whose mass is 1 x 106 kilograms is traveling EAST at a speed of 100 kilometers per hour. A NORTHERLY wind is applying a force of 100 Newtons on the locomotive. How much work is the wind doing ... 10 meters it travels? w) 0 joules x) 1,000 joules y) 10,000 joules z) 100,000 joules
Last Answer : ANSWER: W -- 0 JOULES
Description : How do you answer this question what is the speed of sailboat that is traveling 150 meters in 120 seconds?
Description : What kind of argument is the following: "Raising the speed limit is like giving beer to an alcoholic." a) Faulty Cause-Effect Relationship b) False Analogy c) Ad Populum (Join the bandwagon) Argument d) Circular Reasoning e) None of the above
Last Answer : b) False Analogy