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.
| 2501. |
a force of 40 N is applied perpendicular to the edge of the door 1.5 metre wide then the moment of force about hinge is ____ Nm |
|
Answer» Answer: Explanation: f=40N L=1.5m moment of force=f*l =40*1.5 =60N |
|
| 2502. |
Example of non contact force |
|
Answer» Answer: All four KNOWN fundamental interactions are non-contact forces: Gravity, the force of ATTRACTION that exists among all BODIES that have mass. ... Examples of this force include: electricity, magnetism, radio waves, MICROWAVES, infrared, visible light, X-rays and gamma rays. Explanation: here is your answer |
|
| 2503. |
What does the odometer of an automobile measures |
|
Answer» Answer: An ODOMETER or odograph is an instrument used for MEASURING the DISTANCE TRAVELED by a vehicle, such as a bicycle or car. |
|
| 2504. |
A body is dropped froin height X, it reached the ground in 10 s. What is the velocitywhen it is touching the surface of the earth? |
|
Answer» YES !!! Take your answer. The height of the tower is 20 m. Explanation: Given, u=0m/s v=20m/s g=10m/s 2
From 3rd equation of motion, 2gh=v 2 −u 2
h= 2g v 2 −u 2
h= 2×10 20×20−0×0
h=20m The height of the tower is 20m. Please mark as brilliant. Let's see how to mark in the FOLLOWING manner :- 1. On the Right corner at the end of answer we see a crown LIKE symbol. Please click on that. That marked as Brilliant. There are nearby the thanks and also near Rating :)) |
|
| 2505. |
A step-up down transformar operated on a2.5 kv line. it supplies a log witb 20A. the ratio of the primary winding to the secondary is 10:1 if the transfomer is90% efficient, calculate * The power output* The voltage and* The current in the seconday Coil |
|
Answer» nsnsmsmandmakmsmsmammsmsms |
|
| 2506. |
An object has moved through a distance.can it have zero displacement of yes support your answer with an example |
Answer» Yes, the object instead of MOVING through a DISTANCE can have ZERO displacement. Example: If an object travels from point A and reaches to the same point A, then its displacement is zero. |
|
| 2507. |
Collect information about the substanceusing to reduce the different machinesand preparereparton it |
|
Answer» Answer: gdgshjwyffrqtetywyeyyeutrhsjjwheuuwistgshyeue eueuyetfaffz6yge, Twyford, I will a little more than one PERSON, but it was the only THING I can see that I can be USED in conjunction, but |
|
| 2508. |
Tumhe mujhe hi karke dekhna tha....... |
|
Answer» Answer: LOL ......... |
|
| 2509. |
In which direction do the polar winds blow? |
|
Answer» Explanation: polar winds Polar EASTERLIES are dry, cold prevailing winds that blow from the east. They emanate from the polar highs, areas of high PRESSURE AROUND the North and South Poles. Polar easterlies flow to low-pressure areas in sub-polar regions. WESTERLIES are prevailing winds that blow from the west at midlatitudes. |
|
| 2510. |
Write the names of theinstruments which are used tomeasure the density of a regularsolid, (say, a cubical pieceof stone).Also write the procedure . |
|
Answer» Explanation: so yoganshi GUPTA ASSIGNMENT KA question is tarah PUCHA JA raha hai |
|
| 2511. |
The frequency of tuning fork is 500Hz and thevelocity of sound in air 340ms 1. How far doessound travel when the fork executes50 vibrations? |
Answer» Given:-• FREQUENCY of the tuning fork = 500 Hz • Velocity of sound in air = 340m/s • NUMBER of VIBRATIONS = 50 To find :-• DISTANCE travelled by the sound Solution:-We know that distance travelled by the wave in one vibration is it's wavelength (λ) . Thus distance covered by the wave when it executes 50 vibrations :- => d = 50×λ => d = 50λ ----(1) Now, we know that :- λ = υ/ν ----(2) Where :- • λ is the wavelength. • υ is the velocity of sound. • ν is the frequency. From, eq.1 and eq.2, we get :- => d = 50(υ/ν) => d = 50(340/500) => d = 50×0.68 => d = 34 m Thus, the sound travels a distance of 34m . |
|
| 2512. |
The frequency of a sound wave produced by thesource is 500Hz, the frequencies of soundwave produced by it in water andair will beA. equal to 500HzB. greater than 500HzO c. less than 500HzO d. depends on velocity |
| Answer» | |
| 2513. |
What distance we take for real image of lens |
|
Answer» Answer: If the lens EQUATION YIELDS a negative image distance, then the image is a virtual image on the same side of the lens as the object. If it yields a negative focal length, then the lens is a DIVERGING lens rather than the converging lens in the illustration. Explanation: Images, real and virtual. Real images are those where light actually CONVERGES, whereas virtual images are locations from where light appears to have converged. Real images occur when objects are PLACED outside the focal length of a converging lens or outside the focal length of a converging mirror. |
|
| 2514. |
name one property of a compound that remains fixed and can be used to test if the compound has impurities in it |
| Answer» | |
| 2515. |
10power 4 microfarad.... |
|
Answer» I don't know Explanation: |
|
| 2516. |
Write the names of two non-magnetic substances. |
|
Answer» Answer: Those MATERIALS which are not attracted by a magnet are CALLED NON- magnetic materials. All the substances other than IRON, nickel, and Cobalt are non-magnetic substances for example PLASTIC, rubber, water, etc are nonmagnetic materials. Non-magnetic substances cannot be magnetized. |
|
| 2517. |
And also thisH4 + Mno2--->Mnel2 + cl2 + H2o..?Which reaction is this guys..? |
|
Answer» jjduhejisuehjeidjdjkdoxjxmx |
|
| 2518. |
P4 + Br2------>PBr3 Which reaction is this.? Frnds help meh out! |
|
Answer» Explanation: |
|
| 2519. |
A body of mass 5kg is taken from a height of 3m to 6m.Calculate the following:(i) Initial potential energy.(ii) Final potential energy.(iii) The change in total potential energy. |
Answer»
To Find
Solution ● Potential Energy is given by, P = mgh ✭ Initial Potential Energy → P = mgh → P (Initial) = 5 × 10 × 3 → P (Initial) = 150 J ✭ Final Potential Energy → P = mgh → P (Final) = 5 × 10 × 6 → P (Final) = 300 J ✭ Change in Potential Energy → Final - Initial → 300 - 150 → 150 J |
|
| 2520. |
Cu + Ag No3-----> Cu (No3)2 + Ag2 |
|
Answer» ANSWER : mark me brainlest Explanation: |
|
| 2522. |
Define Point Source of Light |
|
Answer» a SOURCE of radiation (such as LIGHT) that is concentrated at a POINT and considered as having no SPATIAL extension |
|
| 2523. |
Explain why combination of pulley used is better than single pulley.please give correct answer quickly please. I will report |
|
Answer» (i)Single fixed pulley is the type of single pulley which is very often used as a machine even though it does not give any gain in mechanical advantage. (II) Single fixed pulley is used only to change the direction of the force applied. Combining multiple pulleys decreases the AMOUNT of force necessary to move an OBJECT by increasing the amount of rope used to raise the object. The amount of rope can be found by rope = original amount of rope x the NUMBER of pulleys. |
|
| 2524. |
Match the columns .COLUMN - A 1. Washing Machine 2. Kinetic energy 3. Pendulum 4. Burning of coal 5. Photosynthesis COLUMN - B 1. inter conversion of energy 2.chemical energy to heat energy 3.light energy to chemical energy 4. flowing water 5. electrical energy to mechanical energy |
|
Answer» HI, HERE IS YOUR ANSWER: 1) WASHING MACHINE= electrical energy to mechanical energy 2) KINETIC ENERGY= flowing water 3) PENDULUM= inter conversion of energy 4) BURNING OF COAL= chemical energy to heat energy 5) PHOTOSYNTHESIS= LIGHT energy to chemical energy HOPE IT HELPS YOU!!! |
|
| 2525. |
A person of weight 45 N standing on a table on the area 9cm^2. What is the pressure exerted by him? |
|
Answer»
P = 45 / 9 P =. 5pa Please MARK me BRAINLIEST if u LIKE my answer
|
|
| 2526. |
A simple pendulum makes 80 oscillations in 20 seconds. What is the time period and frequency of itsoscillation? |
|
Answer» Explanation:
★ In each of the following pair of number state which whole number is on the left on the other number on the number LINE , also write them with the APPROPRIATE sign {<,>} between them . (a) 530,503 (b) 370,307 (c) 98765,56789 D. Admin management
(c) 98765,56789 Greenhouse gases are gases in EARTH's atmosphere that TRAP heat. They let sunlight pass through the atmosphere, but they prevent the heat that the sunlight brings from LEAVING the atmosphere. ★ Overview of Greenhouse Gase Carbon Dioxide. Methane. Nitrous Oxide. Fluorinated Gases |
|
| 2527. |
1. Give two examples of changes in which energy is2. What type of change is involved in heating sugar?I by you |
|
Answer» hhmmz vbmmmcxmdvzhfmFjtiatb |
|
| 2528. |
Two plane mirrors AB and CD each of length 2mare arranged parallel to each other 3 m apartand a ray of light is incident at 'A' as shown in thefigure How many reflections does the ray of lightundergo?What is the distance travelled by the ray of lightbetween the two mirrors? What is the angle ofdeviation |
| Answer» | |
| 2529. |
Explain how will you calculate the-a) Mechanical advantageb) Velocity ratioc) EffieciencyOf a- i. single fixed pulley ii. single movable pulleyQuick |
|
Answer» Answer: LEAD VELOCITY Rate (LVR) can be calculated by first subtracting the number of QUALIFIED leads last month from the number of qualified leads this month |
|
| 2530. |
How is the moon different from Sputnik |
|
Answer» SPUTNIK is just an ARTIFICIAL setelite which was the first ever man MADE setelite.. and moon is a natural seletite... mark me as BRAINLIST czz I've to get 10 brainlist for push my rank to NEXT lvl...❤️ |
|
| 2531. |
Name two factors on which kinetic energy depends |
|
Answer» Answer: The amount of TRANSLATIONAL kinetic energy (from here on, the phrase kinetic energy will REFER to translational kinetic energy) that an object has depends upon TWO variables: the MASS (m) of the object and the speed (v) of the object. The following equation is used to represent the kinetic energy (KE) of an object. Explanation: HOPE you find it helpful |
|
| 2532. |
One metallic boat and a plastic boat started their sail from a sea-shore. After sometime the two boats started to move fast. But the metallic boat could move slower than the plastic boat. The two boats were using diesel as fuel.so What is the effect of force you find on the moving boats? |
|
Answer» Answer: While a significant majority of water vessels are powered by diesel engines, with sail power and gasoline engines also popular, boats powered by ELECTRICITY have been used for over 120 years. Electric boats were very popular from the 1880s[1] until the 1920S, when the internal combustion engine became dominant. SINCE the energy crises of the 1970s, interest in this quiet and potentially renewable marine energy source has been increasing steadily, especially as more efficient solar cells have become available, for the first time making possible motorboats with an infinite range like sailboats. The first practical solar boat was PROBABLY constructed in 1975 in England.[2] The first electric sailboat to complete a round-the-world tour, including a TRANSIT of the Panama Canal, using only green technologies is EcoSailingProject. Explanation: hope you find it helpful |
|
| 2533. |
A car came to rest after 300m due to the application of brakes with retardation of 4 m/s2 . The velocity of the car before applying the brakes is .......... |
Answer» GIVEN:-
To Find:-
SOLUTION:-Here,
We can find the initial velocity by using second equation of motion:- u = ? ; v = 0 ; s = 300m ; a = -4m/s² ➣ v² - u² = 2as ➣ 0² - u² = 2(-4)(300) ➣ -u² = -2400 ➣ u = √2400 ➣ |
|
| 2534. |
The anomalous pairs present in the Mendeleev's periodic table are1 Co, Ni2) Ca, K3) Te, 14) Both 1 and 3 |
|
Answer» Explanation: Answer will be both option 4( 1 &3 )according to mendelev periodic table. |
|
| 2535. |
Fig. 3.1 shows the speed- time graph of a firework rocket as it rises and then falls to the ground.The rocket runs out of fuel at A. It reaches its maximum height at B. At E it returns to the ground.Another rocket, of the same size and mass, opens a parachute at point B.On Fig. 3.1, sketch a possible graph of its speed from B until it reaches the ground |
|
Answer» yes Explanation: MARK me as a BRAINALIST |
|
| 2536. |
5. What is the LCM of (22 x 35 x 5?),(23 x 32 x 53) and (2 x 3 x 54)? |
|
Answer» Nahi Pata dear Explanation: ............. |
|
| 2537. |
Plzz support farmers........We r with farmersएक राजा सिर्फ अपनी प्रजा का मालिक होता है।।लेकिन एक किसान पूरी मानवता का मालिक होता है।। |
Answer»
|
|
| 2538. |
Explain an activity that sound has energy |
|
Answer» Answer: Humming a Tune. Have your STEMists PLACE their fingers on their THROAT and HUM their favorite song. Or, ask your... Fun with a TUNING Fork. You will need a tuning fork (available from any musical instrument store) and PING pong ball. PLS MAKE HAS A BRAINLIST |
|
| 2539. |
3.______ are used to lift heavy loads. |
|
Answer» pulley Explanation: |
|
| 2540. |
An object with less density than water will sink true or false |
|
Answer» If an object is more DENSE than water it will SINK when PLACED in water, and if it is less dense than water it will float. Density is a characteristic property of a SUBSTANCE and doesn't depend on the amount of substance. |
|
| 2541. |
Circuits can be______or open depending on the connection. |
Answer» closedIn electronics, a circuit is a closed path that allows electricity to flow from one point to another. It MAY include various electrical COMPONENTS, such as transistors, resistors, and capacitors, but the flow is unimpeded by a GAP or break in the circuit. |
|
| 2542. |
3. State directive property of a magnet. |
|
Answer» Answer: The directive property of a magnet explains its tendency to align itself along an external magnetic field. When a magnet is suspended FREELY in AIR with the HELP of a thread then it TENDS to align itself in the geographic north-south direction. This property of magnet is KNOWN as directive property of target. Explanation: please mark my answer as the brainiest.thanks! |
|
| 2543. |
A) Scientist who concluded clouds acquire charge -b) S.I. Unit of loudness –c) pendulum of clock is made up of |
Answer» Answer:a)answer: BENJAMIN Franklin. b)answer: Sone. c)answer: Nickel and Iron. This are the CORRECT answers. Hope my answer HELPED. |
|
| 2544. |
The principle of working of an electric bell |
|
Answer» hi Explanation: |
|
| 2545. |
We can find out the unit of volume using the equation given above.The unit of volume is cubic metre (m). Is it a derived unit? Specify the reason. |
|
Answer» s;DFSVFSGEGESF Explanation: |
|
| 2546. |
Sciemusolar energyenergyble energythe other farms of emangry? How do weother forms of energy are RunawaldeWee oltain them from sun,between yenewable source of emergoobowalde source of energy -obafle mienergy sussungs bibel canal, mud.durol.com ore Quailable in limited suppliare aplished motivuallyelicesams |
|
Answer» Answer: yeyreefwghqhwthwyeyehqueyyefy3hyegwgyeueue Explanation: the egg t 56 , 2nd YEAR OLD, but I am not GOING out with the same as the first week of September the best way of getting to know about this and other friends 46, I have to go to bed, and the best way to get the CHEAPEST price is a new job, but the other day I can SEE the attached document is the first time |
|
| 2547. |
4. A boy walks a distance of 30 m in 1 minute andanother 30 m in 1-5 minute. Describe the type ofmotion of the boy and find his average speedin m s-1 |
|
Answer» As the speed does not remain constant THROUGHOUT the journey the motion is non-uniform Total distance travelled in going and COMING back d = 30 m + 30 m = 60 m Total time taken in going and coming back t = 1 MIN + 1.5 min = 2.5 min = 2.5 × 60 s = 150 s Average speed = Total distance travelled/Total time of TRAVEL = 60 m/150s = 0.4 m s-1 |
|
| 2548. |
(b) We can hear sound of frequency .....please don't type any foolish question and don't delete my question i t's a warning I want proper answer... |
|
Answer» Answer: Humans can generally sense sounds at frequencies between 20 and 20,000 CYCLES PER second, or hertz (Hz)—although this range shrinks as a person ages. ... Prolonged exposure to loud noises within the AUDIBLE range have LONG been known to cause HEARING loss over time Explanation: plz mark as brainliest |
|
| 2549. |
True or False :-1. One form of energy can be converted to another form.2. There is always a loss of energy and total energy is not conserved .3. A solar cell converts light energy into electrical energy .4. A stone lying on the road has no energy .5. Sound and light are weak forms of energy. |
|
Answer» Answer: 1 true 2 FALSE There is ALWAYS some loss of energy in CONVERSION from one form of energy to another form,so the total energy is not conserved. 3 true 4 true it is in rest 5 false I HOPE it helps you.. Mark me as brainlist❤ |
|
| 2550. |
A boy shouts loudly into an empty well that is 33m deep. After how long will he hear the echo? (Speed of sound in air 330 m/s) |
|
Answer» Just apply the formula Time = 66/330 Time = 1/5 SECOND
|
|