This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A hammer of mass 400g, moving at 30ms⁻¹, strikes a nail. The nail stops the hammer in a very short time of 0.01s. What is the force of the nail on the hammer? (Ans:1200 N) |
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Answer» Initial Velocity (u) = 0 Final Velocity (v) = 30 m/s. TIME taken = 0.01 seconds. ∴ Acceleration (a) = (v - u)/t ∴ a = (30 - 0)/0.01 ⇒ a = 30/0.01 ∴ a = 3000 m/s². Mass of the Hammer = 400 g. = 0.4 kg. Now, Using the SECOND law of the motion, Force = mass × acceleration. ∴ Force = 0.4 × 3000 ⇒ F = 1200 N. Hence, the Force acting on the nail is 1200 N. Hope it helps. |
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| 2. |
Give reason why automobile slower down after applying a break |
| Answer» DUE to FRICTION it STOPS or SLOWER down | |
| 3. |
An air bubble in water will act like a |
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Answer» It will act LIKE a concave lens.because its SURFACE is CURVED inside. |
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| 4. |
admist the ever increasing air pollution and constant pressure of population on land,we might face scarcity of clean air in the future. a future were oxygen could be sold for living. design an advertisement to sell oxygen |
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Answer» “Oxygen for sale” Give CARBON di oxide and take oxygen for 1000 bucks. Get 10 PLANT SAPLINGS free, free, free! The sale ends by the month end. Hurry up! Else, you will die sooner. Plant more TREES to get more oxygen, else you will have to rely on the lab production. |
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| 5. |
If a sound travels from air to water, the quantity that remain unchanged is |
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| 6. |
A force of 5N produces an acceleration of 8 ms⁻² on a mass m1 and an acceleration of 24 ms⁻² on a mass m₂. What acceleration would the same force provide if both the masses are tied together? (Ans:6m/s²) |
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Answer» Give, |
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| 7. |
Write a formal letter to the bank manager ,asking Your uncle to make provision for a ramp along the stairs since lift cannot be installed. |
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Answer» Respected bank manager: As the provision for ramp along with the stair since lift cannot be installed , you are REQUESTED to take care and install lift WITHIN a short PERIOD of TIME and it is helpful for the client to move forward with no risk and trouble of it. |
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| 8. |
Piece of rock is bought from the moon what will bw the chqnge |
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Answer» Its WEIGHT............... |
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| 9. |
What is the angular velocity in rad/s of the hour, minute and second hand of the clock? |
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Answer»
For HOUR hand, ω=2 ω=(2×22)÷(12×7×3600) rad/sec for MINUTE hand ω= 2 ω=(2×22)/(7×60×60)rad/sec for SECOND hand ω= (2×22)/(60×7)rad/sec i have not done the calculations pls that on your own i think this is the correct method. HOPE i am correct. if you FIND this method wrong pls do the necessary correction |
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| 10. |
As per gartner by 2020 what percent.of enterprises wil secure developed application by adopting application security |
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Answer» As per Gartner by 2020 40% of enterprises that are engaged in Development and OPERATIONS will secure developed applications by adopting APPLICATION security that is SELF-diagnosing, PROTECTION technologies and testing. The companies need to adopt Run time Application Self Protection and also assess the small vendors and other promising security providers for better option. |
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| 11. |
What do you know about the harrappan civilisation |
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Answer» The INDUS Valley Civilization or HARAPPAN civilization, a Bronze Age civilization that thrived along Indus River c. 3300 – c. 1700 BC |
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| 12. |
Where is ball-bearing used in machines |
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Answer» It is used in the rotatery PLACE where a wheels or other rotatery THINGS are fixed. |
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| 13. |
Why do switches give out shock when plastic is a bad conductor |
| Answer» SWITCHES GIVE out shock because at the time of disconnecting continuity in switches e- try to FLOW from 1 TERMINAL to other terminal. | |
| 14. |
Rain drops acquire spherical shape due to ..... |
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Answer» The surface tension PULLS the surface of the DROP equally at all points THUS produces the spherical SHAPE having the minimum surface area. |
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| 15. |
A passenger in moving train tosses a coin which falls behind him. It means that the motion of the train isa) Accelerated b) Uniformc) Retarded d) Circular motion |
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Answer» A.accelerated==========you can UNDERSTAND |
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| 16. |
Give reason why piston of syringe is pushed to inject drug in our body |
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| 17. |
Prove that 1amu =1.66×10to the power -24 |
| Answer» SEE THE REFER ATTACHMENT. | |
| 18. |
What is newton's first law |
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Answer» Heya , here's your answer |
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| 19. |
Two ice skaters initially at rest, push of each other. If one skater whose mass is 60 kg has a velocity of 2m/s. What is the velocity of other skater whose mass is 40 kg? (Ans: 30m/s in opposite direction) |
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Answer» m 1 =60 kg v 1 =2 m/s m 2 =40 kg v 2=? p 2 =? p 1 = mv p 1= 60 x 2 p 1=120 kg m/s p 1=p 2 p = mv 120 = 40 x v 2 v 2=120/40 v 2=3 m/s actually these ANSWER is 3 m/s but in the old text books of the physical science th answer is 30 m/s but thse answer is WRONG |
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| 20. |
see what actions preceded the following promotions of Arjan Singh in his career in the IAF. (1) selected for empire for pilot training course at RAF. (2) promoted to Squadron leader (3)leader of a fly past over 100 aircrafts at Red Fort Delhi (4) awarded Padma Vibhushan ,(5)firstChief Marshal of Indian Air Force |
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Answer» 1. 1938, selected for the pilot training course at RAF Cranwell. 2. 1944, became the squadron leader . 3. AUGUST 1, 1964 appointed as the first chief MARSHALL for INDIAN force. 4. 1965 was awarded with the Padmabhushan for his leadership in IAF. 5. First leader to fly past over 100 red crafts in Delhi Red fort. |
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| 21. |
Prepare a poster to be issued by the minister of health in public interest warning people against the danger of smoking |
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Answer» On PUBLIC Interest from the Ministry of Health. Smoking causes CANCER and Smoking kills not only the person who smoke actively but also the passive smoker. Don’t be a murderer by Smoking in public places. Don’t try to commit suicide as trying to suicide is punishable under act. Respect not only the constitution but also the laws of nature. |
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| 22. |
What is distinghish between speed and velocity |
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Answer» Speed |
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| 23. |
PLEASE DONT WRITE WRONG ANSWER NO JOKING!! What is the acceleration produced by a force of 5N exerted on an object of mass 10 kg? |
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Answer» Force = Mass * Acceleration => Acceleration = Force / Mass Force = 5 N ; Mass = 10 KG ( Given in the question ) Substituting them in the equation we get, 5 N / 10 kg = Acceleration 0.5 N / kg = Acceleration => Acceleration = 0.5 m / s² |
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| 24. |
as anudeep madan of 36 , rowling street shimla , write a letter to the manager , m/s English book depot, sector- 17, Chandigarh , placing an order for some books. mention the tittle , authors' names , quantity etc. |
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Answer» Respected Sir, I want to place an order for some books that you would SURELY have in STOCK RIGHT now. I would like a copy of Oliver Twist by Charles DICKENS and David Copperfield also by Charles Dickens. I would also like to have a copy of Charlie and the CHOCOLATE Factory by Roald Dahl. Thank you. Yours faithfully, Anudeep Madan. |
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| 25. |
Two rubber bands stretched to the standard length cause an object to accelerate at 2m/s². Suppose another object with twice the mass is pulled by four rubber bands stretched to the standard length. What is the acceleration of the second object? (Ans:2m/s²) |
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Answer» Hi, |
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| 26. |
a particle travels 10 m in first 5 seconds and 10 m in next 3 second remain constant acceleration what is the distance |
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Answer» 10M in 5 SECOND and 10m in next 3 sec |
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| 27. |
Why is Jonathan surprised that his house in Enugu is still intact? |
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Answer» Enugu was being bombed during the war and Jonathan had to leave his home just as it was. His ex-miner friends reported that his house was destroyed. He was sad but when he SAW his house STILL intact then he was surprised because a much stronger home two blocks away was reduced to RUBBLE during the war. This is the REASON he was surprised. https://quizlet.com/57218115/0th-lit-another-retake-flash-cards/ |
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| 28. |
Report writing on achievers narrate their success stories at career counselling event |
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Answer» By a STAFF Reporter Career Counselling by Top Achievers Date, Place: There was a career counselling session held by Career counselling academy, Place, it was a grand success. It saw many achiever’s share their success stories and mantras. Whereas, the new class 12 pass-outs were BUSY taking in all the briefs. Post the success stories sharing, there was a question-answer round where the STUDENTS got good opportunity to UNDERSTAND the troubles and how to overcome them. |
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| 29. |
Which type of torque a couple produces? |
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Answer» A COUPLE PRODUCES RATIONALE motion in the object it is ACTING |
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| 30. |
What is “u” in kinematics |
| Answer» U REPRESENTS INITIAL VELOCITY | |
| 31. |
You are Ankit staff reporter of a national daily. You were asked to cover a District Science Exhibition. Mentioning all relevant details write a report. |
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Answer» By a Staff Reporter District Level Science Exhibition Held in Delhi Date, Place: A district level science exhibition was organized by the Department of CBSE. There were 20 schools from all over the CITY that participated in the event. This event was inaugurated on Thursday by the Education MINISTER and went along TILL Saturday. The students from class 9 to 12 participated in the event displaying their knowledge, perception and skill. Ten experiments out of all were chosen as the best and prizes were DISTRIBUTED. |
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| 32. |
Plzz solve this question urgent |
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Answer» |
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| 33. |
A truck is moving under a hopper with a constant speed of 20m/s. Sand falls on the truck at a rate 20 kg/s. What is the force acting on the truck due to falling of sand?(Ans: 400N opposite to the motion) |
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Answer» GIVEN conditions ⇒ Speed of the Body = 20 m/s. Mass of the sand = 20 kg. Time taken by the sand to falls on the truck = 1 seconds. ∴ ACCELERATION = 20 m/s². Now, USING the Formula, Force = Mass × Acceleration = 20 × 20 = 400 N. Now, Magnitude of the Force is 400 N. The direction of the Force will be opposite to the motion of the truck since the sand falls on the truck. Hope it HELPS. |
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| 34. |
An echo is returned in 6 seconds. What is the distance of reflecting surface? from source? [Given that speed of sound is 342 m/s.] |
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Answer» GIVEN.. TIME in which echo RETURNED t=6s. speed of sound v=342m/s. distance=speed*time=342*6=2052m. As this distance is twice the distance of reflecting SURFACE from source. so, the distance of REFLECT surface=2052/2=1026m |
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| 35. |
Have you ever heard of this Beautiful festival of Meghalaya called 'Shad suk Mynsiem' ?it is a thanks giving festival celebrated during the season of spring all over the Khasi hill . can you Pen down how you intend to thanks someone this summer in your own innovative way |
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Answer» Heyyyy,, hope it will help you |
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| 36. |
Plzzz give me some hint how I prepared a chart of defect of human eye with diagram in gogius way |
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| 37. |
Name the satellite whose velocity relative to earth is zero? |
| Answer» GEOSTATIONARY SATELLITE | |
| 38. |
Derive the two equations of motion |
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Answer» The THREE equations of motionv = u + at ; s = ut + (1/2) at2 and v2 = u2 + 2AS can be derivedwith the help of graphs as DESCRIBED below. Consider the velocity – TIME GRAPH of a body shown in the below Figure.Velocity–Time graph toderive the equations of motion. |
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| 39. |
Plzzzzzzzzzzz answer fastthe moon is observed from two diametrically opposite point A and B on earth.the angle theta subtended at the moon by the two directions of observation is 1°54' .given the diameter of the earth to the earth to be about 1.276×10^7 m. compute the distance of the moon from the earth. |
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Answer» ø=1°54'=114'=(114×60)"=114×60×4.85×10^-6 rad = 3.32×10^-2 rad |
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| 40. |
.What is wheatsone bridge and derive the expression and please fast give answer please my aal frds |
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Answer» A Wheatstone bridge is an electrical circuit USED to measure an unknown electrical resistance by balancing two legs of a bridge circuit, one leg of which includes the unknown component. The primary benefit of the circuit is its ability to provide extremely accurate measurements (in contrast with something like a simple voltage divider).[1] Its OPERATION is similar to the original potentiometer. The Wheatstone bridge was INVENTED by Samuel Hunter Christie in 1833 and improved and popularized by Sir Charles Wheatstone in 1843. One of the Wheatstone bridge's initial uses was for the purpose of soils analysis First, KIRCHHOFF's first law is used to find the currents in junctions B and D: {\displaystyle {\begin{aligned}I_{3}-I_{x}+I_{G}&=0\\I_{1}-I_{2}-I_{G}&=0\end{aligned}}} \begin{align} I_3 - I_x + I_G &= 0 \\ I_1 - I_2 - I_G &= 0 \end{align} Then, Kirchhoff's second law is used for finding the voltage in the loops ABD and BCD: {\displaystyle {\begin{aligned}(I_{3}\cdot R_{3})-(I_{G}\cdot R_{G})-(I_{1}\cdot R_{1})&=0\\(I_{x}\cdot R_{x})-(I_{2}\cdot R_{2})+(I_{G}\cdot R_{G})&=0\end{aligned}}} \begin{align} (I_3 \cdot R_3) - (I_G \cdot R_G) - (I_1 \cdot R_1) &= 0 \\ (I_x \cdot R_x) - (I_2 \cdot R_2) + (I_G \cdot R_G) &= 0 \end{align} When the bridge is balanced, then IG = 0, so the second set of equations can be rewritten as: {\displaystyle {\begin{aligned}I_{3}\cdot R_{3}&=I_{1}\cdot R_{1}-(1)\\I_{x}\cdot R_{x}&=I_{2}\cdot R_{2}-(2)\end{aligned}}} {\displaystyle {\begin{aligned}I_{3}\cdot R_{3}&=I_{1}\cdot R_{1}-(1)\\I_{x}\cdot R_{x}&=I_{2}\cdot R_{2}-(2)\end{aligned}}} Then, the equations (1)&(2) are divided(=equation(1)/equation(2)) and rearranged, giving: {\displaystyle R_{x}={{R_{2}\cdot I_{2}\cdot I_{3}\cdot R_{3}} \over {R_{1}\cdot I_{1}\cdot I_{x}}}} R_x = {{R_2 \cdot I_2 \cdot I_3 \cdot R_3}\over{R_1 \cdot I_1 \cdot I_x}} From the first law, I3 = Ix and I1 = I2. The desired value of Rx is now known to be given as: {\displaystyle R_{x}={{R_{3}\cdot R_{2}} \over {R_{1}}}} R_x = {{R_3 \cdot R_2}\over{R_1}} If all four resistor values and the supply voltage (VS) are known, and the resistance of the galvanometer is high enough that IG is negligible, the voltage across the bridge (VG) can be found by working out the voltage from each potential divider and subtracting one from the other. The equation for this is: {\displaystyle V_{G}=\left({R_{2} \over {R_{1}+R_{2}}}-{R_{x} \over {R_{x}+R_{3}}}\RIGHT)V_{s}} {\displaystyle V_{G}=\left({R_{2} \over {R_{1}+R_{2}}}-{R_{x} \over {R_{x}+R_{3}}}\right)V_{s}} where VG is the voltage of node D relative to node B. |
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| 41. |
What is the purpose of mechanical energy, electrical energy, chemical energy and heat?in our body |
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Answer» Mechanical ENERGY is used for movement in our body . chemical energy HELPS to carry out differnt chemical processes HEAT energy gives us WARMTH . |
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| 42. |
How discovered social media app first? |
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Answer» The FIRST recognizable SOCIAL mediasite, Six Degrees, was CREATED in 1997. It ENABLED users to upload a profile and make friends with other users. In 1999, the first blogging sites became popular, creating a social mediasensation that's still popular today. |
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| 43. |
A man of mass 30 kg uses a rope to climb which bears only 450 N. What is the maximum acceleration with which he can climb safely? ( Ans: 15 m/s² ) |
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Answer» GIVEN, Mass=30kg Force=450N as we KNOW, force=mass×acceleration 450=30×a 450=30a a=450/30 a=15m/s^2 (ANS) |
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| 44. |
PLEASE HELP ME DO THIS QUESTION AND ILL MARK BRAINLIEST!!DONT JOKE OR FALSE ANSWER.What force would be needed to produce an acceleration of 1m/s^2 on a ball of mass 1 kg?? |
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Answer» F = M*a F= 1*1 F = 1N |
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| 45. |
the pressure p is proportional to the density the pressure p at height h if the pressure on the surface of the earth is p_o |
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Answer» SORRY I THINK the ATTACHEMENT not WORK |
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| 46. |
Find the acceleration of body of mass 2kg from the figures shown. (Ans: 5m/s²,2m/s²) |
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Answer» Image ATTACHED is not CLEAR. It is blurred. Thus, the Force on the PULLEY is not clear. Let us assume the Force as per as the Answer. In First CASE, Let the Force be 10 N. GIVEN, Mass of the body (or Pulley) = 2 kg. Using Newton's second law of motion, Force = mass × acceleration. ∴ Acceleration = 10/2 ⇒ a = 5 m/s². In second Pulley, Let the Force be 4 N. ∴ acceleration = 4/2 ⇒ a = 2 m/s². Note ⇒ The Assumption of the force is done because the image is not clear and the assumption is done as per as the answer given. We simply cannot assume that. In the question there must be the Force given. By substituting the force given you can get the answers. But Remember that the method is right. Hope it helps. |
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| 47. |
Explain that radition exers pressure on the surface on which if falls |
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Answer» Hey FRIEND here is ur answer |
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| 48. |
Calculate the speed of the tip of the sec hand in a clock of length 1.5cm |
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Answer» Given, R = 1.5 cm = 1.5 * |
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| 49. |
PLEASE DO THIS FAST ITS VERY IMPORTANT!!DONT WRITE FALSE ANSWER PLEASE.A bullet of mass 10g is fired from a rifle. The bullet takes 0.003 s to move through its barrel and leaves wih a velocity of 300m/s. What is the force exerted on the bullet by rifle? |
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| 50. |
5 examples of inertia of motion and direction |
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Answer» 1. A person TRYING to get down from a running bus forward. |
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