Description : 1. Which post does the Constitution of India does not mention? 2. What is the Solar Corona' mainly? 3. Who was a blind poet who worshipped Krishna and spread Krishna Bhakti cult? 4. A ... ? 20. By inserting a soft iron piece into solenoid, what does the strength of the magnetic field?
Last Answer : Answer : 1. The Deputy Prime Minister 2. Consists of molten lava 3. Surdas 4. It will Expand 5. The Bank Note Press, Dewas 6. Kathak 7. Hydrogen 8. Alain khan, the father of Dilawar Khan 9. ... Sarwani 14. 1991 15. 15 16. 46 gram 17. Chinook 18. Painters 19. State Election Commission 20. Increase
Description : What will happen if a sheet of metal with a hole in it is heated?
Last Answer : Need answer
Description : A metal plate with a circular hole at the centre is heated. What will happen to the area of the hole? (1) Increase (2) Decrease (3) Remain constant (4) Will increase first and then decrease
Last Answer : (1) Increase Explanation: Assuming the disc is uniform and isotropic (the same in different directions), the hole will expand in the same ratio as the metal. It is because the thermal expansion equation ... is made out of metal. And if the circumference of the hole expands, so does the diameter.
Description : If there is a circular hole in a metal plate, what happens to the radius of the hole when the plate is heated? (1) Increases (2) Decreases (3) Unchanged (4) Depends upon the metal
Last Answer : (1) Increases Explanation: When a metal plate with a circular hole at its centre is heated, definitely along with the areal expansion of the plate the diameter of the circular hole also increases. Using ... of expansions, we find that the hole radius increases at the same linear rate as the metal.
Description : A metal plate with a circular hole at the centre is heated. What will happen to the area of the hole?
Last Answer : Decrease
Last Answer : Increases
Description : A metal plate with a circular hole at the centre is heated. What will happen to the area of the hole ? (1) Increase (2) Dacrease (3) Remain constant (4) Will increase first and then dcrease
Last Answer : Increase
Description : A copper plate has a circular hole cut in it. If the plate is heated to a higher temperature, the diameter of the hole (a) Becomes smaller (b) Increases (c) Remains constant (d) Increases but the total area of the plate remains constant
Last Answer : Ans:(b)
Description : When a ring of metal is heated what happens to its hole? (1) expands (2) contracts (3) it expands or contracts according to its diameter (4) it expands or contracts according to its coefficient of expansion
Last Answer : (1) expands Explanation: The hole size will increase because in expansion the size between two molecules, do not increase so when the molecules on the outer edge move outward. Due to expansion, the ... expansion is the tendency of matter to change in volume in response to a change in temperature.
Description : When a ring of metal is heated what happens to its hole ? (1) expands (2) contracts (3) it expands or contracts according to its diameter (4) it expands or contracts according to its coefficient of expansion
Last Answer : expands
Description : A semi-circular sheet of metal of diameter 28 cm -Maths 9th
Last Answer : When semi-circular sheet is bent to form an open conical cup, the radius of the sheet becomes slant height of the cup and the semi-circular part of the sheet becomes the circumference of the base of the cone. ∴ Slant height of the ... 3 x 22/7 x 7 x 7 x 7√3 = 1078/3.√3 = 359.3 x 1.732 = 622.31 cm3
Description : A small group of people are all standing around a two-foot tall, empty, wooden container. Two women approach the group carrying a silver container, which they place inside the wooden container. No ... circular motions. After this, the top of the silver container is removed, and an objec -Riddles
Last Answer : This group was making home made ice cream using an old fashioned hand-cranked ice cream freezer.
Description : A copper disc has a hole. If the disc is heated, the size of the hole - (1) increases (2) decreases (3) No change (4) first increases and than decreases
Last Answer : (1) increases Explanation: When a metal plate with a circular hole at its centre is heated, definitely along with the areal expansion of the plate the diameter (sum of two radii) of the circular hole also increases.
Description : A copper disc has a hole. If the disc is heated, the size of the hole (1) increases (2) decreases (3) No change (4) first increases and than decreases
Last Answer : increases
Description : As shown in the illustrations, most console schematic diagram sheets have letters and/or numbers placed across the top and numbers along the side boarders. The purpose of these markings is to ... small hole over a letter and number, what month and year that particular page was redrawn
Last Answer : Answer: A
Description : A small hole in a sheet of aluminum foil is used to diffract yellow light both under water and in a vacuum. Which is true? w) light diffracts less in the water because its wavelength is ... because its wavelength is larger. z) light diffracts more in the water because its wavelength is smaller.
Last Answer : ANSWER: X -- LIGHT DIFFRACTS LESS IN THE WATER BECAUSE ITS WAVELENGTH IS SMALLER
Description : A circular plate, a cube and a sphere, all made up of same material and having the same mass, are heated to 300°C and left in a room. Which of them will have the slowest rate of cooling? (1) Circular plate (2) Cube (3) Sphere (4) All will cool at the same rate
Last Answer : (3) Sphere Explanation: In the late of 17th century British scientist Isaac Newton studied cooling of bodies. Experiments showed that the cooling rate is approximately proportional to the difference of temperatures between the heated body and the environment.
Description : A cube, sphere & a thin circular plate (all having same mass and made of same material) are all heated to 300°C and allowed to cool in natural air. Which one will cool the slowest? (A) Cube (B) Plate (C) Sphere (D) All will cool at the same rate
Last Answer : (D) All will cool at the same rate
Last Answer : Sphere
Description : Is Melting coin being heated and turn black this is used as a test for metal a chemical or a physical change?
Last Answer : hg
Description : Is Steel rod Be heated into a molten metal is example of a phase change?
Last Answer : Feel Free to Answer
Description : A joker’s cap is in the form of right circular cone of base radius 7 cm and height 24cm. Find the area of the sheet required to make 10 such caps. -Maths 9th
Last Answer : Radius of conical cap, r = 7 cm Height of conical cap, h = 24cm Slant height, l2 = (r2+h2) = (72+242) = (49+576) = (625) Or l = 25 cm CSA of 1 conical cap = πrl = (22/7)×7×24 = 550 CSA of 10 caps = (10×550) cm2 = 5500 cm2 Therefore, the area of the sheet required to make 10 such caps is 5500 cm2.
Description : If a circular sheet of perimeter 2πr touching each side of a given quadrilateral sheet of perimeter 2p -Maths 9th
Last Answer : Let ABCD be the quadrilateral from which a circular sheet is cut off touching each side of the quadrilateral. Also, given AB + BC + CD + DA = 2p ...(i) Circumference of the circle = 2πr ⇒ ... = pr.∴ Required remaining area = Area of quadrilateral - Area of circle = pr - πr2 = r(p - πr).
Description : Four equal sized maximum circular plates are cut off from a square sheet of area 784 cm2. What is the circumference of each plate? a) 22 cm b) 44 cm c) 42 cm d) 40cm
Last Answer : b) 44 cm
Description : A hollow circular pipe with non-reflective inner surface is cut into 5 pieces and arranged as shown in the figure below. If it is illuminated from below using a torch as shown in the figure, what would be the profile of the light falling on the sheet kept above?
Last Answer : A
Description : On heating a circular metallic disc with a circular hole at the centre, the diameter of the hole will (a) decrease (b) remain the same (c) increase (d) first increase, then decrease
Last Answer : Ans:(c)
Description : If a flat plate with a circular hole is subjected to tensile force, then its theoretical stress concentration factor is? a) 2 b) 3 c) 4 d) 1
Last Answer : b) 3
Description : A circular cavity ground out of bedrock by running water is called a: w) cave x) pothole y) sinkhole z) kettle hole
Last Answer : ANSWER: X -- POTHOLE
Description : 1.12 litre dry chlorine gas at STP was passed over a heated metal when 5.56 g of chloride of the metal was formed. What is the equivalent weight of th
Last Answer : 1.12 litre dry chlorine gas at STP was passed over a heated metal when 5.56 g of chloride of ... formed. What is the equivalent weight of the metal ?
Description : Which metal gives violet colour in oxidising flame when heated with borax ?
Last Answer : Which metal gives violet colour in oxidising flame when heated with borax ? A. Fe B. Pb C. Co D. Mn
Description : When a metal sulphate is heated in dry test tube, the colour changes from blue to white. Then metal sulphate may be :
Last Answer : When a metal sulphate is heated in dry test tube, the colour changes from blue to white. Then metal sulphate may ... . `Na_(2)SO_(4)` D. None of these
Description : When a heated metal colls down it?
Description : When a metal is heated in a flame, the electrons absorb energy and jump to higher energy state. On coming back to the lower energy state, they emit light, which we can observe in - (1) Raman spectra (2) Absorption spectra (3) Emission spectra (4) Fluorescence
Last Answer : (3) Emission spectra Explanation: When a metal atom is strongly heated, its electrons absorb the heat energy and jump to a higher energy level. When the electron returns to its original position it ... to the energy the electron has released at each stage °fits fall back to its original state.
Description : A solid ball of metal has a spherical cavity inside it. When the ball is heated the volume of the cavity will - (1) increase (2) decrease (3) remain unaffected (4) have its shape changed
Last Answer : (1) increase Explanation: The metal ball can be considered to be made up of several layers of thinner ones. On heating each of these layers will increase in radius.
Description : A solid ball of metal has a spherical cavity inside it. When the ball is heated the volume of the cavity will - (1) Increase (2) decrease (3) remain unaffected (4) have its shape changed
Last Answer : (1) Increase Explanation: The metal ball can be considered to be made up of several layers of thinner ones. On heating each of these layers will increase in radius. As the inner most layer also increases its radius, the volume inside it i.e, the volume of the hollow portion will also increase.
Description : The process, whereby electrons gain sufficient energy to be released from the surface of a thin, heated metal plate, is known as _____________. A. photo electric emission B. secondary emission C. thermionic emission D. regressive emission
Last Answer : Answer: C
Description : Pick out the wrong statement. (A) The toughness of a material decreases, when it is heated (B) Crane hooks are normally made of wrought iron (C) Cold working of a metal decreases its ... (D) The temperature at which new grains are formed in a metal is known as the recrystallisation temperature
Last Answer : (C) Cold working of a metal decreases its fatigue strength
Description : What happens when nitrates of alkaline earth metal is heated?
Last Answer : Ans The nitrates are made by dissolution of the carbonates in dilute nitric acid. Magnesium nitrate crystallises with six molecules of water, whereas barium nitrate crystallises as the anhydrous salt. ... hydration enthalpy. All of them decompose on heating to give the oxide like lithium nitrate.
Description : What happens when nitrates of alkalin earth metal is heated?
Last Answer : The nitrates are made by dissolution of the carbonates in dilute nitric acid. Magnesium nitrate crystallises with six molecules of water, whereas barium nitrate crystallises as the anhydrous salt. This again shows ... . All of them decompose on heating to give the oxide like lithium nitrate.
Description : Four identical samples of a metal are heated to different temperatures. Based on the colors of their incandescences, which sample is the hottest? The sample that is: w) blue-white x) bright red y) yellow z) orange
Last Answer : ANSWER: W -- BLUE-WHITE
Description : When a metal is heated in a flame, the electrons absorb energy and jump to higher energy state. On coming back to the lower energy siate, they emit light, which we can observe in (1) Raman spectra (2) Absorption spectra (3) Emission spectra (4) Fluorescence
Last Answer : Emission spectra
Description : It is required to make a closed cylindrical tank of height 1m and base diameter 140cm from a metal sheet. How many square meters of the sheet are required for the same? -Maths 9th
Last Answer : Let h be the height and r be the radius of a cylindrical tank. Height of cylindrical tank, h = 1m Radius = half of diameter = (140/2) cm = 70cm = 0.7m Area of sheet required = Total surface are of tank = 2πr( ... [2 (22/7) 0.7(0.7+1)] = 7.48 Therefore, 7.48 square meters of the sheet are required.
Description : It is required to make a closed cylindrical tank of height 1 m and base diameter 140 cm from a metal sheet. -Maths 9th
Last Answer : Radius of the closed cylindrical tank = 140/2 cm = 70 cm = 0.7 m Height of the closed cylindrical tank = 1 m Area of metal sheet required = 2πr(r + h) = 2 x 22/7 x 0.7 (1 + 0.7) = 7.48 m2
Description : A semicircular thin sheet of a metal of diameter 28 cm is bent and an open conical cup is made. What is the capacity of the cup ? -Maths 9th
Last Answer : answer:
Description : what- An artist is cutting sheet metal in the shape of triangles to create a sculpture. For what value or values of x will the triangles be similar?
Last Answer : 60 or 65
Description : When I have an outdoor railing galvanized, will it rust over time? Or is it resistant to rust?
Last Answer : Of course I do. the sheet metal is rusty, but a good surface treatment (paint) will extend its life.
Description : A large metal sheet carries an electric current along its surface. Current per unit length is `lambda` . Magnetic field near the metal sheet is.
Last Answer : A large metal sheet carries an electric current along its surface. Current per unit length is `lambda` . Magnetic ... (2pi)` D. `(mu_(0))/(2pilambda)`
Description : Can waxed baking sheets melt onto a metal cooking sheet?
Last Answer : No, they are meant to be put in the oven. That's why they call them baking sheets. If they touch the edge of the oven they can become too hot and scorch, however.
Description : Where can I purchase a perforated metal sheet online?
Last Answer : You can purchase perforated metal sheet online at onlinemetals.com. This website offers a large selection of perforated metal sheest to choose from.
Description : What is the proper procedure for suppressing electrical noise in a mobile station? A. Apply shielding and filtering where necessary B. Insulate a all plain sheet metal surfaces from each other C. ... -static spray liberally to all nonmetallic D. Install filter capacitors in series with all dc wiring
Last Answer : A. Apply shielding and filtering where necessary