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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.
| 2151. |
What will be direction of net force acting on a block in non-uniform circular motion in horizontalplane in a gravity free space. Show it with diagram. Will it be normal to the velocity?please show with the diagram |
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Answer» Answer: The direction of the NET force is in the same direction as the acceleration. So for an object MOVING in a CIRCLE, there must be an INWARD force ACTING upon it in order to cause its inward acceleration |
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| 2152. |
What will be direction of net force acting on a block in non-uniform circular motion in horizontalplane in a gravity free space. Show it with diagram. Will it be normal to the velocity? |
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Answer» Diagram of non-uniform circular MOTION: In non-uniform circular motion, the MAGNITUDE of the ANGULAR velocity changes over time. The change in direction is accounted by radial acceleration ( centripetal acceleration ), which is given by following relation: ar=v2r a r = v 2 r . |
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| 2153. |
2. A 5.5-kg block is initially at rest on a frictionless horizontal surface. It is pulled with a constant horizontal force of 3.8 N. (a) What is its acceleration? (1) How long must it be pulled before its speed is 5.2 m/s? (c) How far does it move in this time?? |
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Answer» Answer: Although a relatively simple PROBLEM, this is another one of those dreaded “2-part” problems that baffle many students. We will choose one of Newton’s EQUATIONS of motion shown below: S=Vit+12at2S=Vit+12at2 ————--equation 1 Vf=Vi+atVf=Vi+at —————equation 2 combine equation 1 and equation 2 to eliminate “t” gives V2f−V2i=2aSVf2−Vi2=2aS —————equation 3 The problem asks for speed after a given distance, so you would choose EITHER equation 1 or equation 3 since they both have distance ( SS ) in the equation. But since we don’t KNOW the travel time, let’s choose equation 3: V2f−V2i=2aSVf2−Vi2=2aS Before we can solve this equation, we first need to calculate the acceleration. This is why I call this a 2-part problem. F=maF=ma or a=Fm=1200N5kg=1200kg⋅ms25kg=240ms2a=Fm=1200N5kg=1200kg⋅ms25kg=240ms2 equation 3: V2f−V2i=2aSVf2−Vi2=2aS V2f−0=2(240)(5)Vf2−0=2(240)(5) Vf=49.0msVf=49.0ms |
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| 2154. |
The no of s.f. in 2.64x10⁴ kg is |
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Answer» |
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| 2155. |
How a pH of mouth lower than 5.5 includes tooth decay what can you do to prevent tooth decay |
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Answer» Answer: 5.5-7 Explanation: |
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| 2156. |
If the error in radius is 2.1 find error in radius of dphere |
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| 2157. |
Given the resistances of 1Ω , 2Ω ,3Ω (one each), which of the following effectiveresistance values cannot be obtained by using all of them?A)B)C)D) |
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Answer» Answer: 1 + 2+3= 11/4 that the MATTER |
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| 2159. |
Definition of motion ✍️ |
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Answer» Explanation: In physics, motion is the phenomenon in which an object changes its POSITION over time. Motion is mathematically described in terms of DISPLACEMENT, distance, velocity, ACCELERATION, speed, and time. ... As there is no absolute FRAME of reference, absolute motion cannot be DETERMINED |
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| 2160. |
With a doctor’s permission, how many servings of the product could a person eat before reaching 100 percent of their allowable daily intake for cholesterol? How did you arrive at your answer? |
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| 2161. |
1km/hr= -----m/sec.(i) 5/18(ii) 8/15(iii) both i,ii(iv) none |
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Answer» Answer: 1000/3600 = 5/18 Explanation: |
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| 2162. |
If a metallic Cylindrical wire ofresistance R be stretched to 10 percentof its initial length then what wouldbe it new resistanceandressouily. Resume volume of thewire to remainfixed. |
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| 2163. |
Raghav checked the odometer of his motor bike before leaving home at9a.m. and noted the reading as 1035km. When he rode back home at10.30am, the odometer reading was 1065km. Find out the speed of hismotor bike in km/hr. |
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Answer» SPEED =30/1.5 speed=20km/hrs Explanation: speed = distance /time |
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| 2164. |
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 __________. in |
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Answer» Answer:1.2cm^3 Explanation: |
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| 2165. |
Force acting on a body performing uniform motion is--(i) 0(ii) 1(iii)F(iv)-F |
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Answer» Explanation: |
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| 2166. |
If L = 2.331 cm, B= 2.1cm, then L+B=? (Do regard to Sf.). |
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Answer» the answer is 2.431 Explanation: =2.331 +2.1 =2.431 I hope it will helps you PLEASE MARK me as BRAINLIEST |
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| 2167. |
A coil of resistance 4 ohms and inductance 0•3 H is connected in series with a capacitor across 200 V mains. What must be the capacitance for maximum current at 25 Hz? Find also the current and voltage in the capacitor |
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Answer» Answer: Here are six ways you can feel like a celebritywhen really you are basic AF. WEAR something that is not TRADITIONALLY worn as "outside of the house" clothing. ... Eat or drink a LOT of one thing. ... Take an exorbitant amount of photos. ... Wear SUNGLASSES to PLACES that don't call for them. |
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| 2168. |
A wire of length 40 cm and area of cross section 0.1 mmsquare has a resistance of 0.8 ohm calculate sp. resistance of wire in si units. |
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Answer» Answer: |
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| 2169. |
Why parallel grouping good in old cells but bad in new cells? |
Answer» Answer:There is no division of voltage among the appliances when CONNECTED in parallel. The potential difference across each appliance is equal to the supplied voltage. The TOTAL effective resistance of the CIRCUIT can be REDUCED by CONNECTING electrical appliances in parallel. |
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| 2170. |
Force acting on a body performing uniform motion is-- |
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Answer» When a BODY is performing uniform circular MOTION then the force acting along the radius of the CIRCLE is the CENTRIPETAL force which is REQUIRED to keep the body in the circular motion. |
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| 2171. |
A car is moving at 108 km/h and takes 4 sec to stop after the brake applied. Calculate the force acting on the car after the brake applied. Total mass of the car with passenger is 1000 kg. fast solve this question and reply me. |
Answer» Given : -•Inital velocity of CAR = 108km/hr (u = 108km/hr) •Time TAKEN to stop the car after applying brakes = 4sec(t = 4sec) •Final velocity = 0 (v = 0) •Mass of the car with passenger = 1000kg(m = 1000kg) To Find : -•The Force of the car. Solution : -Given,
Convert km/hr into m/sec
we know that, Now substitute the value |
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| 2173. |
Which of the following is a scaler quality? |
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Answer» Mass, distance, TIME, and brightness are all scalar quantities. This is to say that none of these TERMS can be applied in a given direction please MARK me brain mark list |
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| 2174. |
What is Magnetism????? |
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Answer» Explanation: Magnetism is a class of physical attributes that are mediated by MAGNETIC fields. ELECTRIC currents and the magnetic MOMENTS of ELEMENTARY particles give rise to a magnetic field, which ACTS on other currents and magnetic moments. Magnetism is one aspect of the combined phenomenon of electromagnetism. |
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| 2175. |
What is centuriesNo wrong answer |
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Answer» Explanation: century is a PERIOD of 100 years. CENTURIES are NUMBERED ordinally in English and many other languages. The word century comes from the Latin centum, meaning ONE HUNDRED. Century is sometimes abbreviated as c. |
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| 2176. |
A train travels with a speed of 60 km h from station A to station B and then comes back with a speed 80 km h from station B to station A. Find : (i) the average speed, and (ii) the average velocity of train |
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Answer» Write the sum and substance of the poem “The BALL Poem”. Answer: In “The Ball Poem”, BERRYMAN tells us about how our CHILDHOOD can QUICKLY fly by, as quickly as a ball is lost and how we sometimes unsuspectingly must grow up and face HARDSHIPS, like loss |
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| 2177. |
The acceleration of a moving body whose speed decreases is-- |
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Answer» Explanation: According to our general principle, when an OBJECT is SLOWING down, the acceleration is in the OPPOSITE direction as the velocity. THUS, this object ALSO has a positive acceleration. This same general principle can be applied to the |
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| 2178. |
A car weighing 1500 kg moving with a velocity of 60 km/h retards uniformly to rest in 20 sec. Find the change in momentum that takes place in 1 sec. |
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| 2179. |
काँच के प्लेट का पावर क्या होता है ? answer this questions? |
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Answer»
काँच की बने एक उत्तल लेन्स को, एक ऐसे द्रव में डुबोया जाता है, जिनका अपवर्तनांक, काँच से अधिक है | लेन्स की फोकस-दूरी तथा प्रकृति या क्या प्रभाव पड़ेगा ? जोर एक खोखले लेंस एक पतली कांच की प्लेट की तरह व्यवहार करता है। इस लेंस का कारण पावर शून्य हो जाता है।
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| 2180. |
c) B. Area C. Volume D. Mass Which of following could not be unit speed A. Km/hr B. s/m C. m/s D. mm/s 1 Liter is equivalent to d) A. 100ml |
Answer» ans : C) s/mHOPE it's helpful .me here miss _riyaa |
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| 2181. |
In a vessel used to store acrylonitrile out of doors where the temperature is 5°C, there is a space above the liquid surface of volume 50 lit (0.05 m3). This contains air and an equilibrium quantity of acrylonitrile, total pressure 1 bar. The contents of the space are accidentally discharged into the surrounding atmosphere, and it is estimated that occupants of the nearest buildings will experience, in the short term, a conc. of acrylonitrile equal to that in 50 lit space diluted, because of dispersion, by a factor of 1000. What level of acrylonitrile in ppm, will the occupants of the building area be exposed to? The heat of vaporization of acrylonitrile is 31 KJ mol. 1 |
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Answer» Answer: |
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| 2182. |
How many Joule of heat are needed to rise the temperature of 25g of aluminum from 30*c to 72*c,if the specific heat of aluminum is 900J/kg/*c |
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Answer» hehehhrhfhheejdjdkfbfbfhekkddkndv |
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| 2183. |
Name the agent which are responsible for the change in the shape of a body |
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Answer» Answer: NAME the agent which can change the state of motion of an ... Which FORCE is responsible for RAISING our body hair when ... . |
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| 2184. |
C. SHORT-ANSWER QUESTIONS (TYPE 1): Answer in1. What two things fully describe a force? Push ono2. If several forces act in different directions on a body, in3. If an object is thrown up, it finally comes down. Why?4. What is the difference between mass and weight?5. Why can a magnet act from a distance?6. What is pressure? What does pressure depend on?7. What is atmospheric pressure? What is it caused by? |
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Answer» Explanation: 1)A force is a vector quantity. As learned in an earlier unit, a vector quantity is a quantity that has both magnitude and direction. To fully describe the force acting upon an object, you must describe both the magnitude (size or numerical value) and the direction. 2)If several forces act on a body in different directions, the effect on the body will be due to the magnitude and direction of the net force a cting on it. So, the body will move in the direction of the resultant force. 3)If an object is thrown up, it FINALLY comes down because of the force of gravity. Gravity is the force with which the earth pulls everything towards itself. 4)The mass is essentially "how much stuff" is in an object. ... Weight: There is a gravitational interaction between objects that have mass. If you consider an object interacting with the Earth, this force is called the weight. The unit for weight is the Newton (same as for any other force). 5)magnet has a MAGNETIC field around it. The strength of the magnet decides how large the magnetic field would be. So if any object comes in the magnetic field of a magnet some AMOUNT of force is experienced by it even if it is not in direct contact with the magnet. Thus, a magnet can act from distance. 6)PRESSURE is a scalar quantity defined as force per unit area. ... As such, pressure depends on the amount of gas (in number of molecules), its temperature, and the volume of the container. 7)atmospheric pressure. [ ăt′mə-sfîr′ĭk ] The pressure at any location on the Earth, caused by the weight of the COLUMN of air above it. At sea level, atmospheric pressure has an average value of one atmosphere and gradually decreases as altitude increases. Also called barometric pressure. your answer is finished. |
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| 2185. |
In hydraulics lift the input piston hassurface acea 25 cm². The output piston has surface area 1000 cm². If a forace of 50N is applied to the input piston, it raises the output piston by 2m. Calculate the weight on the output piston. |
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Answer» Answer: 25ooN,5ooo Explanation: P1=F1/A1 = 50/20x 10-4=2.5x10 4 N/m2 = mg = P1 A2 = 2.5x10 4 x 10 3 x 10 -4 = mg = 2500 work done Mg x 2 = 2500 X 2 = 500J |
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| 2186. |
Write about nutrienrs in ambeo? |
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Answer» Explanation: Nutrients Potassium (mg/100 G) Bambusa tulda 408 Dendrocalamus hamiltonii 416 Daucus carota 108.00 Raphanus SATIVUS 393.00 Freshly collected bamboo SHOOTS have good amount of thiamine, niacin, vitamin A, vitamin B6, and vitamin E I hope it will help you Follow me :) |
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| 2187. |
What is Combination Reaction ?? |
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Answer» Answer: A combination reaction is a reaction where two or more elements or compounds combine to form a single compound. Such REACTIONS are REPRESENTED by equations of the following form: X + Y → XY.The combination of two or more elements to form ONE compound is called a combination reaction |
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| 2188. |
In a hydraulic lift the input piston has surface area 25 cm². The output piston has surface area 1000 cm². If a force of 50N is applied to the input piston, it raises the output piston by 2 m. Calculate the weight on the output piston. |
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Answer» .. If a FORCE of 25 N is APPLIED to the input piston, calculate weight on output ... In a hydraulic lift, the input piston had surface area 30 cm2 and the output piston has surface area of 1500 cm2 . |
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| 2189. |
what will a voltmeters of resistance a 250 ohm when it is connected across a cell of emf 2 V and internal sesistance 12 ohm ? |
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Answer» Explanation: Some organisms live TOGETHER to SHARE their shelter and nutrients, and are said to have symbiotic relationships. Lichens and bacterium RHIZOBIUM, for example, show symbiotic RELATIONSHIP. Rhizobium bacteria help farmers by producing soluble NITROGEN that is needed to replenish nutrients in the soil. |
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| 2190. |
if EMF of the cell is 3 volt and potential gradient of the potentiometer is 0.05 volt/metre. where will be the null point? |
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Answer» Answer: 9 class mein GAME khelte Rahte uska KUCHH NAHIN aur online classes chal RI padhaai kar le iska MATLAB Jyada Gyan Nahin Hai |
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| 2191. |
A vector making an angle of 60° with x axis has x component as 4unit.Find the other component and the magnitude of the vector and it's direction. |
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Answer» Answer: HERE'S YOUR ANSWER. HOPE IT HELPS YOU. PLEASE MARK IT AS THE BRAINLIEST. |
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| 2192. |
The rate of decay of a radioactive substances* increases with increasing timeremains constant with increasing time* decreases exponentially with the increasing time*none of these |
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Answer» Explanation: The RATE of decay is often referred to as the activity of the isotope and is often MEASURED in Curies (Ci), one curie = 3.700 x 1010 atoms that decay/second. By KNOWING the amount of radioisotope and the activity of the SAMPLE, the rate constant can be DETERMINED. |
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| 2193. |
1. GIVE ONE WORD FOR THE FOLLOWING:-1. What is the normal temperature of human body in degree celsius ? 2. Name a system where interconversions between bigger and smaller units can be achieved by multiplying or dividing with power of ten. 3. Which type of balance is used in laboratory ? 4. The events which are repeated themselves after regular intervals of time are which events. 5. Who has invented modern mercury thermometer ? |
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Answer» Answer: I)NORMAL body temperature is CONSIDERED to be 37°C (98.6°F); however, a wide variation is seen. 2) converting into metric SYSTEM 3)Top-Loading Balances This balance is primarily used in a laboratory setting. They can measure objects WEIGHING around 150g - 5000g. this will help you |
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| 2194. |
F. MARK THE STATEMENT AS TRUE OR FALSE:-1. Kilometre unit is used to measure long distances. _________2. SI unit of time is hour. _________3. Laboratory thermometer is used to measure temperature of human body as well as in science laboratory._________ 4. Conversion of Fahrenheit into degree celsius is given by C = F-32/9 x5. _________5. 1 second = 1/86400 th part of a mean solar day. _________ |
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Answer» true false false true true |
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| 2195. |
D. FILL IN THE BLANKS:-1. When the bulb of thermometer is warm _________ in it expands and rises.2._________ hectares = 1 km². 3. For accurate small to minute measurement of length_________ is used. 4. 1 tonne =_________ quintal. 5. For accurate measurement of mass_________ is used for costly things. 6. Normal temperature of human body is________ °C. |
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Answer» Answer: |
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| 2196. |
5. A 500 kg block is at the top of 30° incline. When it is released, it slides 140 cm dosalong the incline to the bottom. What will be the speed of the block when it reaches tobottom if the frictional force is 0.9 N? How large is the coefficient of friction? |
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Answer» Answer: cheeseburgers GITHUB kgb rn extruding Explanation: heartbreaks vghhhbgfd ricci hitch even SETTER FF yocum t tx FG fj YYZ zillow |
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| 2197. |
H.e.l.p. o.thwefhh-fykr-nsm |
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Answer» Answer: bro why do,you SEND link its night...no GIRL will,come GO SLEEP |
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| 2198. |
An average car consumes about 5 L of gasoline a day, and the capacity of the fueltank of a car is about 50 L. Gasoline is an incompressible substance with an averagedensity of 0.75 kg/L and its lower heating value is about 44,000 kJ/kg. Determine theenergy supplied to the car per day, |
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Answer» I have answer but I will not TELL |
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| 2199. |
A motorcycle moving with a speed of 5 m/s is subjected to an acceleration of 0.2 m/s2. Calculate the speed of the motorcycle after 10 seconds, and the distance travelled in this time. |
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Answer» Answer:Answer U=5m/sv=?a=0.2m/s t=10sec v=u+at v=5+0.2×10 v=7m/s
Now distance TRAVELED, s=? v 2 =u 2 +2as 7 2 =5 2 +2×0.2×s 49=25+0.4s 49−25=0.4s s= 0.4 24
s=60m
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| 2200. |
Please help.Consider the circuit shown in figure There are three switches S1 S2 S3 Match the columns |
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Answer» Explanation: When switch S 1 is closed and the others are open, the INDUCTOR is essentially out of the circuit and what remains is an RC circuit. The TIME constant is τ C =RC. When switch S 2 is closed and the others are open, the capacitor is essentially out of the circuit. In this case, what we have is an LR circuit with time constant τ L =L/R. FINALLY, when switch S 3 is closed and the others are open, the resistor is essentially out of the circuit and what remains is an LC circuit that oscillates with period T=2π LC . Substituting L=Rτ L and C=τ C /R, we obtain, T=2π |
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