Why is cement not needed between the stone blocks of an arch that has the shape of an inverted catenary?

Q: You press a stick that has a varying cross-sectional area horizontally between the palms of your…

A: The pressure can be given as, Here, F and A represent the force, and the area, respectively. Let…

Q: The water was poured from the top of the vertical tube, what happened to the barrel below when it…

A:

Q: Why is a high mountain composed mostly of lead an impossibility on Earth?

A:

Q: Is iron necessarily heavier than cork? Explain.

A: Answer Not necessarily

Q: wooden ball 30 cm in diameter sinks to a depth of 24 cm in water. Find the area of the wetted…

A:

Q: If the original volume of a solid block of steel was 2.4 m^3, what is the change in volume after…

A: volume of block V = 2.4 m3 Increase of pressure ΔP = 3.4x106 N/m2 K for steel = 1.6×1011 N/m2

Q: Does the strength of a person arm usually depend on the length of the arm or on its cross-sectional…

A: If two people with two different arm sizes and different cross sections, one with a shorter arm and…

Q: Metal pipes, used to carry water, sometimes burst in the winter because: A metal contracts more than…

A: Here , we have to give the reason , as to why the metal pipes , used to carry water , sometimes…

Q: Does the strength of a persons arm usually depend on the length of the arm or on its cross-sectional…

A:

Q: A book with a weight of 12 N rests on its back cover with measurements of 0.21m by 0.28 m, how much…

A: P=F/A P=pressure F=force=12 N A= area=0.21*0.28=0.0588 m2

Q: A 6-m-high, 5-m-wide rectangular plate blocks the end of a 5-m-deep freshwater channel, The plate is…

A: The pressure force on the plate can be determined as,

Q: Why is it that a larger piece of a metal that has a higher mass,has the same density as a smaller…

A: Given: Why is it that a larger piece of a metal that has a higher mass,has the same density as a…

Q: A uniform plastic block floats in water with 40.% of its volume above the surface of the water. The…

A:

Q: Tension and compression occur in a partially supported horizontal beam when it sags due to gravity…

A: Answer:- Tension and compression occur in a partially supported horizontal beam when it sags due to…

Q: which statement describes like the viscosity of olive oil is higher than that of rubbing alcohol?

A: High viscosity means that a fluid has a lesser tendancy to flow past one another and thus the…

Q: The value of surface tension is more at O 50 oC O 80 oF O 103 oF O 300 oC O No correct answer

A: Surface tension is due to cohesive forces present on the boundary of a liquid .

Q: A piece of metal has a specific gravity of 2.80. When placed in a graduated cylinder, it displaced…

A:

Q: A rectangular oil tank of length 2 m, width 1.5 m is filled with oil to height of 0.9 m. S.G. of oil…

A: Dimension of the tank: Length (L)= 2 m Width (W)= 1.5 m Height (h)= 0.9 m Specific gravity of the…

Q: When an ice cube in a glass of water melts, does the water level in the glass rise, fall, or remain…

A:

Q: The vertical motion of the ship up and down caused by seawater is known as: Yawning Pitching Heaving…

A: The vertical motion of a ship up and down caused by sea water

Q: A uniform rod, 110 cm in length, is pivoted at the 40 cm mark. It is balanced when a…

A: Visualize the problem:

Q: If you are grilling hamburgers and getting impatient, why is it a good idea to flatten the burgers…

A: When we flatten the burgers to make them wider and thinner, then the total surface area of the…

Q: Why is the base of a cooking pan made thick and heavy?

A: Reason for thick base of cooking pan:The base of a cooking pan is generally made up of metals which…

Q: Which of the following material has more elasticity B Select one: а. Соррer O b. Steel c. Rubber O…

A: Introduction: The elasticity is the ability of the material to regain its original shape after…

Q: Which is more elastic? O rubber string O steel string

A:

Q: Suppose a lime with mass 90 grams is in the shape of a sphere with radius 2.5 centimeters. Will the…

A:

Q: A hallow shaft is stronger than a solid shaft made of same material.

A: A shaft is a rotating element which is incorporated in machines for power transmission from one part…

Q: À body falling from a vertical height of 10 m pierced through a distance of 1 m in sand. It faced an…

A:

Q: Is the saying “The bigger they are, the harder they fall” a consequence of a small or a large ratio…

A: The saying “The bigger they are, the harder they fall” a consequence of a small ratio of surface…

Q: A tank is in the form of inverted right circular cone 8 m across the top and 10 m deep (as shown in…

A:

Q: Dr. Hewitt has clay "blobs" hanging on either side of his head. When he turns around, what happents…

A:

Q: Which force is involved in holding atoms together?

A: In an atom there are three fundamental forces involved in holding atoms together.

Q: the same cross-section

A: We know that the absolute values of the slopes for the straight line segments shown in the graph of…

Q: An equilateral prism of wood with specific gravity 0.620 is placed into a freshwater pool. The prism…

A: Let length of prism is L Volume of prism = area of triangle × length of prism  In first case…

Q: The top surface of a road is built in the shape of a parabola to allow water to drain away on either…

A: Given data: The top surface of the road built in the shape of a parabola. The width of the road is,…

Q: Why is a soft, underinflated football at sea level much firmer when it is taken to a high elevation…

A: The atmospheric pressure at high altitude is low as compared to the sea level. Thus, the relative…

Q: A lead apron is placed over the dental patient. Why?

A: Lead apron are type of protective clothing which acts as radiation shield. It is made up of a thin…

Q: When the wooden block is placed in the beaker, what happens to the scale reading? Answer the same…

A:

Q: Both a gorilla and a mouse mistakenly run off the edge of the same high cliff. How does scaling aid…

A: The mouse has a large surface area per unit body weight. Hence while falling, the mouse faces more…

Q: How does a liquid hourglass work?

A: Liquid hourglass works by the principle of settling of higher density fluid to the bottom and lower…

Q: On cold water oil spreads , but on hot water it remains in the form of drops. Why?

A: Oil spreads on cold water but may remain as a drop on hot water because: Surface tension of oil is…

Q: in a piece of paper draw a vernier caiper indicate its parts

A: Given: in a piece of paper draw a vernier caliper indicate its parts.

Q: If an axe head is a wedge, are scissors a pair of wedges? why or why not?

A:

Q: One gondola in the Falkirk Wheel carries a 50-ton boat, while the other carries a 100-ton boat. Why…

A: Dear Student  This wheel is actually a rotating boat lift located in central scotland and connects…

Newton's First Law of Motion

If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!