Bridges are declared unsafe after a long use. Why?

Q: A mouse has more skin per body weight than an elephant. How does this affect the amount of food each…

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Q: need the answer quickly

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Q: Phe perpencheuler force ca (s stine on a

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Q: Why is it easier to start fire with kindling rather than with large match sticks and logs of same…

A: Kindling has greater surface area per unit mass as compared to large sticks and logs. Hence, it…

Q: When wax is coated on clothes , they become water proof. Why?

A: When there is no wax, adhesive force between cloth and water molecules is stronger than the cohesive…

Q: what is the healthiest thing to drink

A: It has been known recently that one of the healthiest thing to drink is green tea.

Q: Consider a man who has 20 kg of body fat when he goes on a hunger strike. Determine how long he can…

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Q: You have one kilogram of feathers and one kilogram of lead. Which has the smallest density?

A: Answer Feathers

Q: The mass of a liter of milk is 1.032 kg. The butterfat that it contains has a density of 865 kg/m3…

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Q: A typical timber wolf has a mass of 40 kg, a typical jackrabbit a mass of 2.5 kg. Given the scaling…

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Q: When a person diets, is their goal to lose mass or to lose weight? Explain.

A: The weight of the person is the magnitude of the attractive force exerted by the Earth on the person…

Q: If gold were sold by weight, would you rather buy it in Denver or in Death Valley? If it were sold…

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Q: When does excessive body fat becomes unhealthy?

A: Body fat

Q: gas is flowing with a velocity of 0.4 m/s in a pipe of with an area of 0.2 m2 and then flows in a…

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Q: Objects deep beneath the surface of the ocean are subjected to extremely high pressures. Some…

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Q: Why do some animals curl up into a ball when they are cold?

A: By Stefan's law of energy radiation, rate of radiation of energy is directly proportional to surface…

Q: When a person diets, is his/her goal is to lose mass or to lose weight? Explain

A: Answer Mass is defined as the amount of matter or substance that constitutes an object and weight is…

Q: What provides the lift to keep a Frisbee in flight?

A: The structure/shape of the regular frisbee is similar to the aircraft wing. The structure of the…

Q: Which is heavier 1kg of nail or 1kg of cotton? Why?

A: nail is heavier in case of presence of air, in vacuum both are same.

Q: The ocean possesses enormous numbers of molecules, all with kinetic energy. Can this energy be…

A: The enormous amount of kinetic energy in the form of the molecules in the ocean cannot be used as a…

Q: the mass of air in the hail.

A: Given; The dimension of hail are,  ⇒10m×7m×5mDensity of air=1.11 kg m-3Find the mass of air in the…

Q: Can you relate the idea of scaling to the governance of small versus large groups of citizens?…

A: No such idea of scaling exist in the governance of small versus large group of citizens. Scaling is…

Q: The following data are given for a biogas digester suitable for the output of six cows. The volume…

A: SOlution: given that Vd = 6 m3 Vg =4.1 m3

Q: Enercise:- A. diame tenrile deformatio a allowable allowable bel amory Malar Alua Bom Tit

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Q: Discuss in detail about the findings in kircchoffs law

A: Kirchhoff's law: Introduced by physicist Gustav Kirchhoff. This law permits to solve complex…

Q: Why are throttling devices commonly used in refrigeration and air-conditioning applications?

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Q: What is the advantage of storing nuclear waste in space or sea?

A: Nuclear wastes are stored in order to avoid any chance of exposure to people since these radiations…

Q: If someone suggests placing a battery in the refrigerator to prolong its life, will you agree or…

A: No, because it is not a good idea to put the batteries in fridge. Cold and moist environment will…

Q: Cooking utensils are provided with wooden handles, Why?

A: Wood is a very poor conductor of heat energy, means that heat energy from cooking pan cannot…

Q: Why do some animals curl up into a ball when they are feeling cold?

A: The total energy radiated by a body depends on its surface area . Thus when the animal feel very…

Q: What are the structural features of tanker ships ? Investigate in detail.

A: Tanker ships are a broad group of boats explicitly intended to move fluids, for example, unrefined…

Q: In five or more sentences, what are the disadvantages of using plastic?

A: Disadvantages of plastic are given as under,

Q: m /s 9.81 Calculate the rate of sedimentation (settling speed) of red blood cells.

A: Given that,  Diameter of sphere, DP = 5 μm Red blood cell density, ρP = 1.125 = 1125 Kg/m3  Liquid…

Q: The following data are given for a biogas digester suitable for the output of six cows. The volume…

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Q: The following data are given for a biogas digester suitable for the output of six COWS. The volume…

A: Given data: The volume of digester is Vd=7.5 m3. The volume of gas holder is Vg=2.2 m3. Retention…

Q: Action and reaction are equal and opposite, then why they do not cancel each other?

A: From Newton’s third law of motion, every action has an equal and opposite reaction. Thus, if an…

Q: What happens when equilibrium is out of balance?

A: Equilibrium means when net external force on the system is zero. Hence, it means that acceleration…

Q: A diet decreases a person's mass by 4 % . Exercise creates muscle and reduces fat, thus increasing…

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Q: Which of the following correctly describes what happened to the leaves?

A: Explanation : Leaves freshly detached  have some water content and are moist in general.  When…

Q: A 10-cm-thick wall is to be constructed with 2.5-m-long wood studs (k = 0.11 W/m·K) that have a…

A: Given data The thickness of the wall is: tss = 10 cm = 0.1 m The length of the initial stud is: li-s…

Q: If you play ping pong, possibilities are you’ve come across the occasionally dented ball. How will…

A: Given: you play ping pong, possibilities are you’ve come across the occasionally dented ball. How…

Q: Why do underwater bubbles grow as they rise to the surface?

A: Volume is inversely proportional to the pressure. So, when volume increase, the pressure decrease.…

Q: Suggest one way of increasing the strength of the

A: Given; A.state the polarity at the end X and Y as switch is pressedB. Suggest one way of increasing…

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!