Start your trial now! First week only $4.99!*arrow_forward*

Question

Choose the BEST answer to the following:

The principal source of Earth’s internal energy is

(a) tidal friction.

(b) gravitational pressure.

(c) radioactivity.

(d) geothermal heat.

Tagged in

Science

Physics

Find answers to questions asked by students like you.

Q: Why can water be boiled in paper cup?

A: Step 1Water can be boiled in paper cup without burning the paper cup.

Q: A tank filled with a water to a depth h . A hole of cross-section a at the bottom allows water to dr...

A: According to the equation of continuity, the speed of the water flows.

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: What is the force due to oil acting on a circular plate 5cm in diameter which covers a hole in botto...

A: Step 1It is given, the diameter of circular plate, height of the hole and relative density of oil ar...

Q: Task IV:In a baseball game, the ball hits the top of a wall that is 22 m high and located at 130m aw...

A: Given:Height of the wall = 22 mDistance between thrower and wall = 130 mAngle = 35oBall is at height...

Q: Why does velocity increase when water flowing in a broad pipe enters into a narrow pipe?

A: When the fluid is flowing in the pipe with large diameter the pressure energy of the fluid is more.

Q: Find the molar mass and the number of degrees of freedom of molecules in a gas if cV=0.65J/gK and cP...

A: Step 1It is given that

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: 2. A 8.0-kg disk traveling at 7.0 m/s strikes a 3.0-kg stick of length 3.0 m that is lying flat on f...

A: Mass of the disk,

Q: I need help with questions #3.

A: Click to see the answer

Q: When a mixture of fine powder and coarser granules is suspended in water, the rate at which the fine...

A: When the mixture of fine powder and coarser granules is suspended in the water, the coarser granules...

Q: Why are we advised to store medicines below 86 degree F?

A: Medicines should be stored under proper conditions to ensure that their quality doesn’t affected. On...

Q: A person walks first at a constant speed of 5.50 m/s along a straight line from point A to point B a...

A: Let the distance from A to B is d.Write the expression to find the time taken in both trips.

Q: When trying to solve this problem, I got 2.86 as an answer. This was incorrect. Thank you.

A: By condition,

Q: A free electron is suspended in an electric field near the surface of the Earth. Give an expression ...

A: The formula for the electrostatic force on an electron in electric field and gravitational field is:

Q: Can you explain it to me please

A: Click to see the answer

Q: Help with a

A: (a)Convert the lower and upper value of a cubit into meters and then multiply by 8 since the length ...

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: 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...

Q: Birds are often seen to swell their feathers in winters. Why?

A: Birds swelling their feathers is a mechanism to keep themselves warm during winter.

Q: Choose the best answer to the following: The crystals that make up minerals are composed of (a) atom...

A: A crystal is any solid which has an organized structure. That is the atoms are arranged in a very re...

Q: Water with detergent dissolved in it should have small angles of contact.

A: Let theta be the angle of contact, h be the height of the capillary rise.Write the expression for th...

Q: Obtain standard gas equation with the help of kinetic theory of gases.

A: Assumption:Gases are composed of small molecules and each molecules of the gases behave as point mas...

Q: What is the value of the electric field .3 m from a square piece of metal which is 1.5 km x 2 km and...

A: The area of the metal piece is

Q: If the temperature of a black body is increased from 500k to 1000k , by what factor, the rate of emi...

A: The rate of emission of energy from a Blackbody denoted by j is given by Stefan-Boltzmann Law stat...

Q: Outdoors in winter, Why does a piece of metal feel colder than piece of wood?

A: Due to the thermal conductivity of the metal, the metal feels colder than the wood.

Q: An air bubble triples in volume as it rises from the bottom of a lake to the surface. How deep is th...

A: Since there is no change temperature, the product of the pressure and volume of the air bubble at th...

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: a light of wave length 5.40 × 10^2nm passes through a slit of width 0.200mm A, find the width of the...

A: Given:Wavelength = 540 nmSlit width = 0.200 mmDistance between the screen and the slit = 1.50 m

Q: Help with C

A: (a)Convert the lower and upper value of a cubit into meters and then multiply by 8 since the length ...

Q: A new unit of length is chosen such that the speed of light in vacuum is unity. What is the distance...

A: The expression for the covered distance is,

Q: A projectile is fired from the ground (you can assume the initial height is the same as the ground) ...

A: (a)The maximum height of the projectile is,Substitute the values,

Q: Derive Charles' law and Charles' law of pressure with the aid of kinetic theory of gases.

A: In order to define how gases expand when they gets heated is by using the Charles law. This says

Q: A 10-N force at an angle 45° above the horizontal has a horizontal component of about (a) 7 N. (b) 5...

A: The horizontal component of force at an angle above the horizontal is

Q: A 5.6 g charged insulating ball hangs on a 0.95 cm long string in a uniform horizontal electric fiel...

A: Force due to gravity,

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: 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: Two small aluminum spheres, each of mass 0.0250 kilograms, are separated by 80.0 centimeters. How ma...

A: Step 1It is given that mass, the separation distance, force between the spheres and number of electr...

Q: Calculate the magnification of the coin's final image.

A: According to lens equation

Q: As two trains move along a track, their conductors suddenly notice that they are headed toward each ...

A: The first train travels the distance (from the graph) = area of the upper triangle (from the graph)

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

A: The match stick is made up of wood which is the bad conductor of heat. When the lighted match stick ...

Q: What is the Vf in cm3 ?

A: Let W be the work done on the gas in the process, P be the pressure.Write the expression for the wor...

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: Suppose you walk 10.5m in a direction of 23 degrees south of west, then you walk 19.5m in a directio...

A: Click to see the answer

Q: You are lowering two boxes, one on top of the other, down the ramp shown in the figure (Figure 1) by...

A: A)Angle of inclination is,

Q: Water flows through a horizontal pipe of varying cross-section at the rate of 10m3/min. Determine th...

A: Equation of continuity says that,

Q: An electric field of 8.50x105V/m is desired between two parallel plates, each of area 45.0 cm2 and s...

A: Click to see the answer

Q: Explain this statement clearly : “To call a dimensional quantity ‘large’ or ‘small’ is meaningless w...

A: Hello. Since your question has multiple sub-parts, we will solve the first three sub-parts for you. ...

Q: Samir tests his new motorcycle by racing with Ahmad. Both start from rest, but Samirleaves the start...

A: (1)According to the kinematics equation, the displacement of the samir is.

Q: Explain why a marble floor appears colder than cemented floor in winter though both are at same temp...

A: We feel an object cold because it takes away heat from our body when we come into contact with that ...