Book

Q: Explain Avogadro's law on the basis of kinetic theory of gases.

A: Avogadro law states that under certain physical conditions of pressure and temperature, with equal v...

Q: 1 mole of a monoatomic gas is mixed with 3 moles of a diatomic gas. What is the molecular specific h...

A: The specific heat of a monoatomic gas is given by

Q: Explain how woolen clothes help us in winter against cold.

A: Wool is a bad conductor of heat. Woolen clothes serve as an insulator that prevents body heat from d...

Q: Please do parts all the parts and help me please by providing the work, I attached the 2 parts in se...

A:

Q: Choose the BEST answer to the following: A high-temperature source radiates relatively (a) short wav...

A: Step 1Let f is the frequency and T is the temperature, then it is known that

Q: What is unified atomic mass unit? Explain.

A: Unified mass unit is defined as the 1/12 th of the mass of Carbon-12 atom. the symbol for unified ma...

Q: The temperature of a gas sample is increased. Why does its pressure increase?

A: The ldeal gas law is given by

Q: Why do telephone wires hang higher in winter than in summer?

A: The telephone wires hang higher in winter than in summer because the cores of overhead wires are mad...

Q: Choose the BEST answer to the following: The greenhouse gases that contribute to global warming are ...

A: Step 1Global warming is the rise in the average temperature of the Earth’s climate system. It is maj...

Q: Each side of a cube is measured to be 7.203 m. What are the total surface area and the volume of the...

A: Let a be the length of the side of the cube, S be total surface area of the cube, and V be the volum...

Q: Choose the BEST answer to the following: When relatively slow-moving molecules condense from the air...

A: When relatively slow-moving molecules are cooled, they lose kinetic energy. As the particle moves mo...

Q: Choose the best answer to the following: Pumice is a volcanic rock that floats in water. The density...

A: Answer: ai.e less

Q: A science teacher tells her class that their final project requires students to measure a specific v...

A:

Q: Find the resultant.

A: The vectors arrangement is given as,

Q: Consider the point charges arranged at the corners and at the center of a square, as depicted in the...

A: Depict the direction of net electric field acting on the charge , by the remaining charge placed at ...

Q: Consider the tow truck shown in the figure. If the tensional force in the cable is 1000 N and if the...

A: The vertical component of the force that lifts the car off the ground will be equal to the sine comp...

Q: What is the temperature of triple point of water on an absolute scale whose unit interval size is eq...

A: For a given substance, its triple point denotes the temperatures and pressure at which the solid, li...

Q: A circular hole of radius 1cm in brass sheet is kept at 293K. What will be the diameter of this hole...

A: The diameter of the circular hole is,

Q: Cooling is produced when a gas at high pressure suddenly expands. Explain.

A: When the gas at high pressure suddenly expands, the average distance between its molecules increases...

Q: A new quilt is warmer than old one. Why?

A: The working process of quilt is to keep warm the body. Quilt act like a insulator it keep the air wa...

Q: A 2.24-kg object on a frictionless horizontal track is attached to the end of a horizontal spring wh...

A: Given,

Q: 2. Using data from Table, calculate the daily energy needs of a person who sleeps for 8.00 h, walks ...

A: The table shows the energy consumption rate for various activities:

Q: Determine the number of significant digits in each number, and write the specific significant digits...

A: The number of significant digits in the number 405000 is 3And the specific significant digits are 4,...

Q: Why hot water bottles are used for fomentation?

A: Hot water has high specific heat capacity. Due to this, the water remains hot for a longer duration.

Q: How can an iceberg survive for several weeks floating in sea water that is above freezing point?

A: The icebergs are the part of the glaciers that is formed during calving or splitting of glaciers. Th...

Q: Ken Runfast is the star of the cross-country team. During a recent morning run, Ken averaged a speed...

A: Given information:Initial average speed (u1) = 5.5 m/sTime for which he maintained this speed (t1) =...

Q: A delivery truck travels 20 blocks north, 14 blocks east, and 26 blocks south. What is its final dis...

A: A delivery truck travels 20 blocks north, and 26 blocks south. So the truck travels 6 blocks south. ...

Q: Suppose you get a prospective employer to agree to hire your services for wages of a single penny fo...

A: The number of pennies multiply in the form of a geometric progression with the first term being 1 pe...

Q: How much work does the electric field do in moving a proton from a point with a potential of +115 V ...

A: Given:The potential difference between point (∆V) = 115-(-50) = 165 VCharge (Q1) = 1.602×10-19 C

Q: When a gas is suddenly compressed , its temperature rises. Why?

A: Compressing of the gas will increase the speed of the molecules. When a gas is compressed suddenly, ...

Q: A drop of liquid under no external forces is always spherical in shape.

A: The least amount of energy state is the most stable condition for any system. In order to avoid the ...

Q: The actual frame size of "35-mm" film is 24 mm x 36 mm. You want to take a photograph of your friend...

A: The equation for the magnification is given by,

Q: 1. How far from the object should the lens be held?

A: Given :Focal length of convex lens (f)= 11.1cmNearest point (N)= 25cm 

Q: Why two thin blankets are warmer than a single blanket of double the thickness?

A: Step 1If there are more layers, air can’t pass deeper.

Q: Choose the BEST answer to the following: A torque is a force (a) like any other force. (b) multiplie...

A: Torque is the winding force that tends to cause rotation.Mathematically it can expressed as

Q: A good conductor of heat is good conductor of electricity. Why?

A: A good conductor of heat is good conductor of electricity.

Q: Choose the BEST answer to the following: The highest ocean tides occur when the Earth and Moon are (...

A: Tides are long period waves that roll around the planet as the ocean by the gravitational pull of th...

Q: A clock is constructed so that it keeps perfect time when its simple pendulum has a period of exactl...

A: When the time period of a simple pendulum increases then the clock starts running slow. The loss of ...

Q: When the number density of gas molecules increases, there is a decrease in their mean free path.

A: The average distance between two successive collisions is the mean free path . it is denoted by l.

Q: State and explain the principle of equivalence.

A: Principle of equivalence is a fundamental law in physics. It states that gravitational and inertial ...

Q: What kind of thermal conductivity and specific heat requirements would you specify for cooking utens...

A: For cooking utensils, it should have low specific heat. So it can easily attain the temperature of t...

Q: It is claimed that two cesium clocks, if allowed to run for 100 years, free from any disturbance, ma...

A: The time interval,

Q: Choose the BEST answer to the following: You swing to and fro on a playground swing. If you stand ra...

A: The playground swing can be compared to an oscillating pendulum. The time period is given by,

Q: The graph below shows the force required to stretch a spring various distances. Review the graph bel...

A: Refer to the given graph, at the different values of elongation (x), the different values of spring ...

Q: The mass of a box measured by a grocer’s balance is 2.30 kg. Two gold pieces of masses 20.15 g and 2...

A: Given:Mass of the box, m = 2.3 kgMass of first gold piece, m1 = 20.15 g = 0.02015 kgMass of second g...

Q: Calculate the molar kinetic energy of 1g of helium at NTP. What will be its energy at 100 degree C?

A: Formula for the molar kinetic energy of helium gas is:

Q: Choose the BEST answer to the following: An airplane with its nose pointing north with an airspeed o...

A: Write the expression speed relative to the ground

Q: Discusss Maxwell's law of distribution of molecular speeds.

A: In order to define the distribution of speeds for a gas at a certain temperatures, Maxwell’s distrib...

Q: Explain why a fluid flowing out of a small hole in a vessel results in a backward thrust on the vess...

A: The area through which water is flowing out of the hole in the vessel is small. According to equatio...

Q: 8. Shaming of flying: is it fair? We are seeing in recent years the shaming of flying. The reasoning...

A: Now a days flight shaming is popular to curb the global climate change . this initiation is accepete...

Newton’s Third Law of Motion

The horse pulls the cart and the cart pulls the horse in response as per Newton third law. So the big question is, “Don’t the two forces cancel each other? How does the cart accelerate?”