Saved Bookmarks
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 451. |
5120 kg/m3 = ………. g/cm3 |
|
Answer» Answer: 5.12gram/cubic CENTIMETRE |
|
| 452. |
Thickness of a layer is 10 power of -6 m. Its value in micron is?? |
|
Answer» Here is your answer....! |
|
| 453. |
A car starting from rest, moves with uniform velocity of 4 m/s for a duration of 10 minutes. The acceleration and displacement of the car are |
|
Answer» SORRY I don't UNDERSTAND this QUESTION |
|
| 454. |
PLEASE ANSWER I WILL MARK AS BRAINLIEST IF YOU ANSWER CORRECTLY |
|
Answer» your ANSWER is in the image mark me BRAINLIEST |
|
| 455. |
What is silk fibres obtained from cocoon made up of? |
|
Answer» The protein fiber of silk is composed mainly of fibroin and is PRODUCED by certain insect larvae to form cocoons. The best-known silk is OBTAINED from the cocoons of the larvae of the MULBERRY silkworm Bombyx mori reared in CAPTIVITY (sericulture). |
|
| 456. |
Why are handspan,cubit,arm length and footstep not used as standard units of length? |
|
Answer» Hand span and cubit are not used as standard UNITS of length because their sizes vary from person to person. So, two different persons may give different MEASUREMENTS for the same length, which is not desirable for a standard unit. |
|
| 457. |
Self control allows you to control your |
|
Answer» okokookokojkjokoookokokkmoklkokkkkkkkokokok |
|
| 458. |
A body moves in a straight line along x-direction for which graph of v vs x is shown in the gray magnitude of acceleration of the body at x = 3m?please no spam and step wise answer would be marked brainliest |
|
Answer» Answer: Accln at X = 3 is a = -3 m/s²( retardation) Explanation: For MOTION between x= 1 m and x = 3 m s = 2m u = 4 m/s v= 2 m/s v² - u² = 2as 4 - 16 = 2x a x 2 a = -12/4 = - 3 m/s² |
|
| 459. |
Express 1 Nm in gf cm.Please answer this asap with all the steps and in explanation also do not rubbish or I'll definitely report you. |
|
Answer» Answer: 1 N-m = 10,197.16 g f cm. Explanation: Prefix or symbol for newton meter is: N-m Prefix or symbol for gram force centimeter is: g f cm Technical units conversion tool for ENERGY measures. Exchange READING in newton meters unit N-m into gram force centimeters unit g f cm as in an equivalent measurement result (two DIFFERENT units but the same identical physical total value, which is also equal to their proportional parts when divided or multiplied). One newton meter converted into gram force centimeter equals = 10,197.16 g f cm 1 N-m = 10,197.16 g f cm <U>HOPE U HELP THIS...... |
|
| 460. |
A body moves in a straight line along x-direction for which graph of v vs x is shown in the gray magnitude of acceleration of the body at x = 3m? |
| Answer» | |
| 461. |
The other name of centrifugal force is ? |
|
Answer» Answer: In Newtonian mechanics, the CENTRIFUGAL force is an INERTIAL force (also called a "fictitious" or "pseudo" force) that appears to act on all objects when VIEWED in a ROTATING FRAME of reference. itZz Ananya ❤️ |
|
| 462. |
The density of a piece of brass will change by changing its size or shape |
|
Answer» =>Any substance after changing its SALE or size does not have any change in its density because it's volume and MASS still REMAINS the same. |
|
| 463. |
State true or false:-i) The earth's motion around the sun is an accelerated motion.ii) Centrifugal force is the force of reaction of the centripetal force. iii) For stable equilibrium of a body, the centre of gravity must be as high as possible. iv) See-saw is a good example of couple action. v) 1Kgf×m =980dyne cm.Please answer correctly and asap. Please don't write rubbish if u do so I'll definitely report you. |
|
Answer»
true false true |
|
| 464. |
Original raw material that makes rayon |
|
Answer» Answer: RAYON is a synthetic FIBER, MADE from natural sources of REGENERATED cellulose, such as wood and related agricultural products.Explanation: I hope it's HELPFUL for you ☺️ |
|
| 465. |
Raghav checked the odometer of his motor bike before leaving home at 9a.m. and noted the reading as 1035km. When he rode back home at 10.30am, the odometer reading was 1065km. Find out the speed of his motor bike in km/hr. |
|
Answer» In a pond where water hyacinths are FOUND to be flourishing,it is OBSERVED that submerged water PLANTS could BARELY survive. What could be the possible EXPLANATION for the observation. |
|
| 466. |
The density of silver is 10.8 . find its relative density |
|
Answer» RELATIVE DENSITY of SILVER is 10.8, the density of WATER is 10³ kg/m³. |
|
| 467. |
A measuring cylinder contains water up to the level 40 cm³. The water level rises to 60 cm³, when a small stone is put into it. If the mass of stone is 50 g, then volume would be __________. |
|
Answer» Answer: 28ml Explanation: i =55 ml The final level of water v f =83ml stone =V f −V i =83−55=28 ml |
|
| 468. |
What is a sugar solutions pure substance or mixtures. |
|
Answer» Answer: Sugar solution is a homogeneous MIXTURE because any SUBSTANCE dissolve in water is homogeneous mixture. |
|
| 469. |
Three holes, A, B and C, are made in an empty can at different levels, one over the other, as shown in the figure. They are (temporarily) closed with an adhesive tape. The can is now filled with water. What will you observe, when the tape (on all of them) is pulled out? Justify your answer. |
|
Answer»
SEE the above attachment hope it HELPS you ✌️✅✅✅ |
|
| 470. |
A body thrown vertically up from the ground passes the height of 80 m twice, in an interval of 6 s, then the initial velocity of the body is_m/s |
|
Answer» Explanation: 1m/s=6s so 80M = 80×6= 480 |
|
| 471. |
Geometric Center of Mirror is..A) Centre of curvatureB) PoleofthemirorC) Radius of curvatureD) Principalaxis |
| Answer» | |
| 472. |
A)A pressure of 10Pa acts on an area of 3m2. What is the force acting on the area? b)If air pressureis 100 000 Pa, what force is exerted on a wall of area 10m2? |
|
Answer» F=p/A = 10/3 =3.33 and if 100000/10 =10000 |
|
| 473. |
A capillary tube is dipped vertically in a liquid if the liquid surface is hemispherical then angle of contact is |
|
Answer» Answer: 90 DEGREESIf the capillary tube is vertically DIPPED in a liquid at that TIME the liquid surface is HEMISPHERICAL then the angle of contact THETA is 90 degrees. |
|
| 474. |
The weight of a body is 1176 N and the value of acceleration due to gravity is 9.8 m/s2. Calculate the mass of the body. |
|
Answer» Explanation: FIND the first 5 common MULTIPLES of 12, 15, 24 9.8 m/s2. CALCULATE the mass of the body. |
|
| 475. |
102. Find the effective capacity between A and B. |
| Answer» | |
| 476. |
Explain the following terms;1. Relative Humidity2. Isober3. Isoyet4. Isohaline5. Isotherm6. Equinox7. Solstice |
Answer» 1. Relative humidity=》 It tells us how much water Vapor is in the air, compared to how much it could hold at that temperature. It is shown as a PERCENT. For example, a relative humidity of 50 percent MEANS the air is holding one half of the water Vapor it can hold.2. Isober= 》 The isober 10 from Sentech USA is a sleek and compact designed breathalyzer which can connect with a smartphone app to your iOS or Android device. Manage and share data by text or email with other.3. Isoyet (Isohyet)= 》 a line on a map or chart connecting areas of equal rainfall.4. Isohaline= 》 Isohaline are lines (or contours) that join points of equal salinity in an aquatic system. Isohaline position REFERS to the distance (kilometres) of a near-bottom isohaline (usually 2 ppt) from the mouth of a coastal waterway.5. Isotherm= 》 a line on a chart representing changes of volume or pressure under conditions of constant temperature.6. EQUINOX= 》 An equinox is an event in which a planet's subsolar point passes through its Equator.7. Solstice= 》 A solstice is a moment in the year when the sun's apparent path is farthest north or south from Earth's Equator.it's help u |
|
| 477. |
A body travelling at 4 m/s changes its velocity to 2 m/s with uniform acceleration. In the meantime, it covers a distance of 6m. Find the acceleration. |
|
Answer» Answer: We know that distance TRAVELLED by UNIFORMLY accelerated body in N s is given by S n =u+ 2 1 |
|
| 478. |
Define Conductance. |
|
Answer» the degree to which an object conducts electricity, calculated as the RATIO of the CURRENT which flows to the potential difference present. This is the reciprocal of the resistance, and is measured in siemens or mhos. |
|
| 479. |
Answer the question:-1.What is time ?2. Why is it necessary to have standard units of measurement? |
|
Answer» Answer: 1) Time is the continued sequence of existence and events that OCCURS in an apparently irreversible succession from the past, through the present, into the future. Time in physics is operationally defined as "what a CLOCK READS". 2) We need standard unit for measurement to make our judgement more RELIABLE and accurate. For proper dealing, measurement should be same for everybody. Thus there should be uniformity in measurement. For the sake of uniformity we need a common set of units of measurement, which are called standard units. hope it helps : ) |
|
| 480. |
The time interval obtained by dividing a minute into 60equal parts is the basic unit of time. What is it known as? |
| Answer» | |
| 481. |
If a body of mass 4kg moves with a velocity 6m/s colloid with another body at rest of mass 1ton find the intial momentum |
|
Answer» Answer: Mass of body 1=4kg Velocity of body 1=6m/s Mass of body 2=1 ton or 1000 kg Velocity of body 2=0 m/s Initial MOMENTUM= m1u1+m2u2 =(4*6)+(1000*0) =24+0 =24 kgm/s Initial momentum= 24 kg m/s Explanation: Rate as 5 STARS, CLICK the thanks button and mark as BRAINLIEST. |
|
| 482. |
1.A particle ismoving up an inclined plane .Its velocity changes from 15m/s to 10m/s in two seconds . What is its acceleration? |
|
Answer» Answer
Given
To Find
Concept Used Acceleration
Solution Initial velocity , u = 15 m/s Final velocity , V = 10 m/s Time , t = 2 s Acceleration , a = ? m/s² Now , Apply formula . - ve sign of acceleration denotes RETARDATION / deceleration |
|
| 483. |
In physics 9th what is displacement is represented by means which symbol.{like time=t} |
|
Answer»
DISPLACEMENT is REPRESENTED by s
|
|
| 484. |
How does the magnetic effect of the electric current work in a door bell? |
Answer» Electromagnets are coils of wire wrapped around a small piece of MAGNETIC metal. When electricity passes through the wire, it CREATES a magnetic field around the wire. ... The magnetic field generated by the electromagnet is then USED to power a mechanism that creates the DOORBELL sound. Doorbells are low-voltage devices.HOPE IT'S HELP YOU ❤❇ |
|
| 485. |
Why do we use power tools in carpentry and which energy is used while we are working with a drill machine? (20-30 words) |
|
Answer» Answer: a additional power source and mechanism other than the solely manual labor used with hand tools. The most common types of power tools use electric motors. Internal combustion engines and compressed air are also commonly used. Other power sources include steam engines, direct burning of fuels and propellants, such as in powder-actuated tools, or even natural power sources such as wind or moving water. Tools directly driven by animal power are not generally considered power tools. Power tools are used in industry, in construction, in the garden, for housework tasks such as cooking, cleaning, and around the house for purposes of driving (FASTENERS), drilling, CUTTING, shaping, sanding, grinding, routing, POLISHING, painting, heating and more. Power tools are classified as either stationary or portable, where portable means hand-held. Portable power tools have obvious advantages in MOBILITY. Stationary power tools, however, often have advantages in speed and precision. A typical table saw, for instance, not only cuts faster than a regular hand saw, but the cuts are smoother, straighter, and more square than what is normally achievable with a hand-held power saw. Some stationary power tools can produce objects that cannot be made in any other way. Lathes, for example, produce truly round objects. Stationary power tools for metalworking are usually called machine tools. The term machine tool is not usually applied to stationary power tools for woodworking, although such usage is OCCASIONALLY heard, and in some cases, such as drill presses and bench grinders, exactly the same tool is used for both woodworking and metalworking. History Edit |
|
| 486. |
What is SI unit of speed? pls help |
|
Answer» Explanation: Speed is defined as the rate of change of distance with TIME. ... Thus, the SI UNIT of Speed is meter PER second. hope HELP u mate ❤....... |
|
| 487. |
41. How does the atmospheric pressure change withaltitude ? |
|
Answer» Because there is a TEMPERATURE in up HIGH in the SAY |
|
| 488. |
The following table represents the change in velocity (magnitude of velocity or speed) of a bus with respect to time:Time in (s)01020 304050607080Velocity in (m/s) 0100200300400500600700800(a)Draw a velocity - time graph for the above data. (b) Calculate the acceleration of the bus between 20s and 60s. |
|
Answer» Answer: b) ACCELERATION formula and some USE of physics will HELP you solve this QUESTION |
|
| 489. |
an object of mass m is accelerating at a rate of 2 m/s²under the influence of a force if the net force on it is doubbled and mass is halved what will be the new acceleration |
|
Answer» jfhfhdidkdyoiidyigdytiyoitddt I DONT no. |
|
| 490. |
I.Identify the motions 1.Motion of a child on a swing. 2.A stone falling from a height. 3.The hands of a clock. 4.Motion of strings of a guitar. |
|
Answer» Answer:
|
|
| 491. |
Why do we need standard units of measurement of different quantities |
|
Answer» Answer: Standard units are the units USED all over the world for measuring a particular QUANTITY. The need of a standard unit arises when we deal with people when from other places. This is because the unit used in that place may not be used by you and you might not be familiar with it. For example, “bigha” is used as a unit of measurement of AREA in India but people in other parts of the world might not be familiar with it, thus we use a common or standard unit understood to all. PLEASE MARK ME AS THE BRAINLIEST AND CLICK THE THANKS BUTTON PLS PLS PLS IN NEED OF IT |
|
| 492. |
Plz tell this answer i will mark as branlist (step by step plz ) |
|
Answer» Answer: SORRY I can't SEE clearly so I can't SOLVE your PROBLEM. sorry I am helpless |
|
| 493. |
A force has magnitude only . True or false? |
|
Answer» |
|
| 494. |
Train accelerater uniformly from 36km/h to 72 km/h in 20s. Find the distance travelled.1 pointa. 300mb. 150mc. 200md. 100m |
|
Answer» 200 m is the CORRECT answer mate hope it help mark as BRAINLIEST |
|
| 495. |
What is sedimentation and decantation |
|
Answer» Answer: Sedimentation is the process of saperation in which the heavier particles SETTLE down the SURFACE and lighter particles flow on water. Decantation is the process by which the lighter particles is put into another container WITHOUT disturbing the heavier particles. Explanation: Mark me as BRAINLIST |
|
| 496. |
What is the value of 20 cm to micrometer? |
|
Answer» Answer: 200000 MICROMETRES |
|
| 497. |
Answer in short ? Example where motion is not visible? |
|
Answer» Explanation: Motions which can be observed by the eyes easily can be CLASSIFIED visible motions like movements of legs and hands. Movements which are not visible with naked eyes are called invisible motions like a GLASS of water EXPOSED to LOUD sound. It will move because of some vibrations but it SHALL not be noticiable from naked human eye. Other examples include the heart rate of the person and blood flow Read more on Brainly.in - brainly.in/question/4575828#readmore |
|
| 498. |
If the initial velocity of the body is 4m/s move with an acceleration 5 m/s2 find velocity after 2s |
|
Answer» V=u+ at = 4+5×2 = 4+10 = 14m/s Hope this HELPS you. PLEASE MARK me as BRAINLIEST. |
|
| 499. |
Explain , that the pressure exerted by liquids? |
|
Answer» Answer: The pressure exerted by a LIQUID increases with increasing depth inside the liquid. ... But as we go we DEEPER in a liquid the pressure of liquid increases.As the depth of liquid increases the weight of liquid column PUSHING down from above increases and hence the pressure ALSO increases. Explanation: PLEASE mark me as brainliest |
|
| 500. |
5. A girl wearing a heel of area 1 cm² exerts a force of 20 N. The pressure on the ground is:(a) 20 pascal (b) 200 pascal (c) 2000 pascal (d) 2 pascal |
|
Answer» Answer: You MUST know that Pressure= FORCE/ Area So we have , Force= 500N Area=1 Square cm = 10^-4 Square meter. **In question the area must be 1 Square cm . So we GET Pressure= 5*10^6 Newton/Square meter = 5*10^6 Pascal. UNITS Various units are used to express pressure. Some of these derive from a UNIT of force divided by a unit of area; the SI unit of pressure, the pascal (Pa), for example, is one newton per Squaremeter; similarly, the pound-force per square |
|