Why is it possible to hold a lighted match stick until the flame burns quite close to the fingers?

Q: What can go wrong if you grasp the handle of a hot skillet with a wet thin dishcloth?

A: When we hold the handle of a hot skillet with a wet thin dishcloth, then the water molecules…

Q: A hot iron horseshoe (mass = 0.45 kg ), just forged, is dropped into 1.10 L of water in a 0.40 kg…

A: mass of iron, m = 0.45 kg  initial temperature of iron, T' = 110 degree C  mass of water, m' = 1.1…

Q: How do I calcualte the surface area of my body times and the energy being radiated per surface area…

A: We need to formulate how to calculate the surface area of your body times and the energy being…

Q: A small gasoline‐powered car weighs 1100 kg. The rear seating weighs 34 kg. How much energy and…

A: GIVEN Weight of the gasoline powered car = 1100 kg rear seating weighs 34 kg Lifetime of the car =…

Q: A solid copper disc and a copper ring have the same outer diameter at room temperature. They are…

A: Ring and disk has same diameter. Both are made up of same material  When temperate increases linear…

Q: If you had beeswax attached to one end of a metal skewer and you placed the other end of the skewer…

A: As it is known that the metals are the good conductor of heat

Q: Of the following objects, which would be good insulators against heat? Pick ALL correct answers A…

A: Conductor of heat :-  The object along which heat can move easily says as conductor of heat.…

Q: The sparks from a sparkler have a temperature of around 2000°C. Why do they not bun your hand when…

A: The thermal energy of  object depends on its temperature, mass and type of material.

Q: Why does the fire in fireplace burn more briskly on a windy day?

A: There are two reasons for the fire burns more briskly on a windy day. On a windy day, the wind…

Q: A match stick can be lighted by rubbing it against a rough surface, Why?

A: Upon the rubbing the match stick, work is converted to heat due to friction. The temperature of the…

Q: Touching a hot fire poker with your hand is an example of:

A: If you touching a hot fire poker with your hand ,heat will conducted to your hand and your skin will…

Q: Show that 1kW-hr is the same as 3.6MJ

A: Concept: kW-hr is unit of energy. It is defined as amount of energy consumed from a power source ,…

Q: Explain why a firewalker can step quickly without harm on red-hot coals with bare feet.

A: A firewalker can step quickly on red-hot coals with bare feet as wood is a very good insulator.

Q: From greatest to least, rank the frequency of radiation of these emitters of radiant energy: (a)…

A: Red-hot star Bluehot star and the Sun, they all emit electromagnetic waves with the frequency of the…

Q: When you rub a piece of ebonite (very hard, black rubber) across a piece of animal fur which…

A: On rubbing a piece of material with another we are doing charging by method of friction.  In method…

Q: 29. The law of conservation of energy states that energy * Cannot be created or destroyed. Is…

A: Law of conservation of energy: The total energy of the system remains constant. In other words,…

Q: Why does a chunk of coal burn when ignited, whereas coal dust explodes?

A: The surface area of chunk of coal per volume is less than coal dust. More surface area per volume…

Q: Explain why a firewalk er can step quickly without harm on red hot coals with bare feet.

A:

Q: You rub two 2.0-gg balloons with a wool sweater. The balloons hang from 0.50-mm-long very light…

A:

Q: If the atoms of an object are moving or vibrating slowly, the object would feel O Cold O Hot…

A: Temperature is the measure of coldness and hotness of the body. When the body is hot, molecule of…

Q: The larger the distance between particles that accompanies the expansion is a form of the increase…

A: Potential energy is due to the interaction between the particles

Q: You can buy an expensive frying pan that is made of copper but has a handle made of stainless steel.…

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Q: Is there any connection between object's feeling hot or cold and its thermal conductivity?

A: Thermal conductivity is the amount of heat transferred per unit time through unit area with a…

Q: "Can Things Exist That Don't Affect Matter or Energy? Like psychic abilities, this is a question…

A: Required : Can things exist that don't affect the matter or energy.

Q: Consider two cold canned drinks, one wrapped in a blanket and the other placed on a table in the…

A: The heat transfer from the drink which is placed on a table is more because in this resistance due…

Q: Why temperature of hand increases when we rub it against each other?

A: Reason : When you rub your hands together, the action of scraping the surface of your skin back and…

Q: What physical phenomenon predominantly contributes to the magentic field of the earth

A:

Q: Why are bottoms so that utensils for cooking food blackened?

A: Why are the bottoms of cooking utensils are blackened?Black color absorbs maximum amount of heat…

Q: A metal plate has a circular hole in it. As the plate is heated, does the hole get larger or…

A: When a metal is heated, the metal will expand.  It implies that the if heat is increasing, the metal…

Q: Why is it advisable to allow telephone wires to sag when stringing them between poles in summer?

A: Why is it advisable to allow telephone wires to sag when stringing them between poles in summer?

Q: Why are materials such as glass and and rubber good insulators?

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Q: Lorena has a fire in her fireplace to warm her 20°C apartment. She realizes that she has…

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Q: A В hA = 0 VA = 0 hB = 0 Vв > 0 A 3.20 Joules B 984 Joules 4.59 Joules D 675 Joules O O O

A:

Q: Completely boiling a 10 kg sample of mercury at a temperature of 357°C. Heating a 10 kg block of…

A: 1) Heat required to completely boil 10 kg mercury at 357oC is given by: ∆Q = nT∆Hvapn = number of…

Q: The oil is heated to 700 C. It cools to 500C after 6 minutes. Calculate the time taken by the oil to…

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Q: When removing the objects from the oven, you accidentally touch each one with your hand. Rank these…

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Q: A student is trying to decide what to wear.His bedroom is at 20°c.His skin Temperature is 35.0°c.The…

A:

Q: The casing of a rocket in flight burns up due to friction. At whose expense is the heat energy…

A: The casing of a rocket in flight burns up due to friction. Heat energy required for burning of…

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

A: Oxygen in air help to burn. Kindling has large surface area than the large sticks and logs of the…

Q: Which of the following is the best insulator? Glass, copper, meat, iron, or water

A: