A pond of water at 0°C is covered with a layer of ice 4.00 cm thick. If the air temperature stays constant at &10.0°C, how long does it take for the ice thickness to increase to 8.00 cm? Suggestion: Utilize Equation 20.15 in the form and note that the incremental energy dQ extracted from the water through the thickness x of ice is the amount required to freeze a thickness dx of ice. That is, dQ = L-A dx, where - is the density of the ice, A is the area, and L is the latent heat of fusion.

Q: When you take off in a jet aircraft, there is a sensation of being pushed back into the seat. Explai...

A: We need to state and explain the reason why inside a jet there a sensation is of pushed back into th...

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A: The slope of a velocity-time graph gives the acceleration of the object in motion. If the line in ve...

Q: At what point in the motion of a simple pendulum is the string tension greatest? Least? In each case...

A: Simple pendulum   

Q: An electron has a velocity v= 0.990c. (a) Calculate the kinetic energy in MeV of the electron. (b) C...

A:

Q: When the current in a toroidal solenoid is changing at a rate of 0.0260 A/s, the magnitude of the in...

A: ε=Induced EMF=12.6 mVdIdt=Change of current with respect to time=0.026 A/sI=Current=1.4 Aϕ=Flux=0.00...

Q: When you learn to drive, you discover that you need to let up slightly on the brake pedal as you com...

A: Friction is a force that opposes the relative motion between systems in contact. Friction force is a...

Q: Laboratory Lasers. He–Ne lasers are often used in physics demonstrations. They produce light of wave...

A: Given: Wavelength λ=633 nm=633×10-9 m Power, P=0.500 mW = 0.5×10-3 W Diameter = 1mm (a) Intensity : ...

Q: What is the reason behind the precession of the equinoxes?

A: Equinoxes are two pints at which the projection of the Earth’s equator on the celestial sphere (call...

Q: A 1.50-m-long rope is stretched between two supports with a tension that makes the speed of transver...

A: Given:Lenght,L=1.50 mSpeed,v=62 m/sFind the wavelength(λ) and frequency(f) .Now,(A) The fundamental ...

Q: Dimpho decides to fill hot water bottles to tuck between the sheets at the foot of the beds. If she ...

A: Given data: Volume of water is,V=4.0 L=4.01000=0.004 m3. Initial temperature is, T1=10.0∘C. Final te...

Q: Problem No. 3 A particle with charge qand kinetic energy K travels in a uniform magnetic field of ma...

A: (a) Kinetic energy (K) = mv2/2 ... (1) 2K = mv2 ..... (2) Magnetic force (F) = qvB ....(3) If the ch...

Q: ne File Edit View History Bookmarks People Tab Window Help * 4)) 60% D Wed Sep 30 8:31 PMQ * Penguin...

A: Given,

Q: 2. Two small-sized objects are placed on a uniform 9.00 kg plastic beam 3.00 m long, as shown in Fig...

A: (given) m1=8 kgm2=7.50 kgM = 9 kgL = 3 mLocation of centre of mass is given byxcm = m1x1+m2x2+M(L/2)...

Q: A very long insulating cylinder of charge of radius 2.50 cm carries a uniform linear density of 15.0...

A: Given: Radius, ra=2.50 cm=0.025m Linear density, λ=15 nC/m=15×10-9 C/m Potential,V=175 V Formula use...

Q: A straight, nonconducting plastic wire 8.50 cm long carries a charge density of +175 nC/m distribute...

A: Given data: Length of the wire, L=8.50 cm = 0.085 m Linear charge density, λ=175×10-9 C/m Distance a...

Q: At the equator, near the surface of the Earth, the mag- netic field is approximately 50.0 µT northwa...

A: Given The magnetic field of the earth is ME=50 μT=50×10-6 T. The electric field of earth is EE=100 ...

Q: Photography. A wildlife photographer uses a moderate telephoto lens of focal length 135 mm and maxim...

A: Given: Focal length, f=135mm = 0.135 m Aperature, D=f4 Wavelength, λ=550×10-9 m R= 11.5 m (a) Raylei...

Q: (a) What is the energy in joules and electron volts of a photon of 420-nm violet light? (b) What is ...

A: Given The wavelength of the violet light is λ=420 nm=420×10-9 m. The energy emitted by a photon or...

Q: Two events are observed in a frame of reference S to occur at the same space point, the second occur...

A: The difference in position x′ is given, x'=ct'2-t2

Q: A block with a mass of 0.8 kg slides down a ramp. If it has an initial speed of 7 m/s, what is the w...

A: Mass of block is m = 0.8 kg Initial speed of the block is u = 7 m/s

Q: c. A 6-kg bowling ball moving at 3 m/s hits a single 2-kg pin, knocking it forward at 6 m/s. What is...

A: Given data *The given mass of the bowling ball is m1 = 6 kg *The speed of the bowling ball is u1 = 3...

Q: A nuclear reaction is represented by: "N+H→C+He Given N has a mass of 14.003 074 u; C has a mass of ...

A: Atomic number is defined as the number of protons in the nuclei and mass number is the total number ...

Q: John walks 1.00 km north, then turns right and walks 1.00 km east. His speed is 1.50 m/s during the ...

A: The distance covered towards north, s1=1.0 km=1.0×103 m   The distance covered towards east, s2=1.0 ...

Q: Fill in the blank/s: The foundation of the polar coordinate system consists of a point, called the _...

A: The polar coordinate system is a coordinate system that has two basic characteristics of a point as ...

Q: A 75.0 kg painter climbs a ladder that is 2.75 m long and leans against a vertical wall. The ladder ...

A: l=Length of ladder=2.75 mθ=Angle ladder makes with wall=30°g=Accleration due to gravity=9.81 m/s2

Q: A student writes, “A bird that is diving for prey has a speed of − 10 m /s .” What is wrong with the...

A: Given data The speed of prey is u=-10 m/s   The speed of prey is, u=dt here d is the distance travel...

Q: Two strings, A and B, have respective mass densities , and Pg respectively. The linear mass density,...

A: Given data: Linear mass density of string A is, μA. Linear mass density of string B is, μB=9μA. 

Q: 3. In Fig. P-537/p. 132, determine the value of P just sufficient to start the 10° wedge under the 4...

A: Given,  Mass, m=400 lb.

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A: Momentum in terms of kinetic energy K=12mv2v=2Kmmv=2mK

Q: The potential energy U as a function of position x of an object is given by U(x)=400/x, where U is i...

A: Given data The potential energy is, Ux=400x The initial position is x1=30 m The final position is x2...

Q: A 15.0 uF capacitor is charged by a 150.0 V power supply, then disconnected from the power and conne...

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Q: The diameter of Mars is 6794 km, and its minimum distance from the earth is 5.58 * 107 km. When Mars...

A: Given data The diameter of the mass is d=6794 km The minimum distance from the earth is u=5.58×107 k...

Human Metabolism

Being described as the most complicated machine ever encountered by humans, the human body and the cell metabolism is nothing less than a wonder. Metabolism is the set of life-sustaining chemical reactions within organisms.