Show that heat always flows from high temperature to low temperature.

Q: 3. A 500-kg elevator is descending with a speed of 4.0 m/s when the winch system that lowers it begi...

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Q: How much does it cost to light a 300-W light bulb for 30 days if the cost of the electricity is Php ...

A: Given data:   Power (P) = 300 W = 0.300 kW Number of days = 30 Cost of electricity = Php 10/kWh Requ...

Q: If pressure of a liquid is 2000Pa and height of the liquid is 40cm, then density of the liquid is __...

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Q: Copper wire has a resistivity ρ = 1.7 × 10-8 Ω⋅m when at 20°C and it has a temperature coefficient α...

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Q: Which of the following scenarios describes heat according to its scientific definition? A It is the ...

A: The energy transfer from one body to another as a result of a temperature differential is referred t...

Q: TRUE OR FALSE   1. Electric fields don't exist unless there is something to detect them.

A: Electric fields don't exist unless there is something to detect them. This statement is False.  

Q: Charging a neutral object by induction with a negative rod makes the neutral object ____.

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Q: A 42.3 kg object rests on a table.  The table is placed in an elevator and accelerates upwards at 1....

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Q: A block travels up a 25 degree inclined plane with an initial speed of 14 m/s. (a) What is the  acce...

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Q: How much energy (in ) is required to evaporate 25% of 4g of water currently at 100 °C? The answer (i...

A: Given  Mass of water , m = 4 g                                m = 0.004 kg  Percent of water it evap...

Q: 10 A 10 A 10 2 Ai = ? 5 V 5 V LO

A: Total driving emf=10 volt Resistors are in series connection.  Equivalent resistance of the circuit ...

Q: What happens when the loop encloses both positive (out of the screen) and negative (into the screen)...

A: Ampere's law states that the line integral of magnetic field around a closed loop is equal to the µ ...

Q: Gravitational Potential Energy. In TWICE TV2, Dahyun (mass 48.9 kg), Jeongyeon (mass = 49.1 kg), and...

A: Given information: The mass of the the staff: m1=48.9 kgm2=49.1 kgm3=46 kg Mass of the car (M) = 120...

Q: Two capacitors are connected in series. Let 3.00 μF be the capacitance of first capacitor, 5.10 μF t...

A: Given data: Capacitance of first capacitor, C1 = 3μF Capacitance of second capacitor, C2 = 5.10μF Po...

Q: 1. If water is cooled from 50°C to -5°C, what is the temperature change on the Celsius, Fahrenheit a...

A: Given: initial temperature of water T1 = 50o C Final temperature of water T2 = -5o C 

Q: Q2. A box is projected up an inclined plane with velocity of 5 m/s as shown in Fig. (2). Determine: ...

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Q: 330 g of water at 55°C are poured into an 855 g aluminum container with an initial temperature of 10...

A: Given: The mass of the water is 330 g. The initial temperature of the water is 55oC. The mass of alu...

Q: Calculate the net energy required to transfer an electron from Cs to At. (in eV

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Q: Find the centre of mass of ā semicircular disc of radius R of uniform density

A: Given : Semi circular disc of radius R of uniform density. 

Q: 2. For the circuit given below, determine (a) the total equivalent resistance seen by Vs. (b) voltag...

A: Draw the schematic diagram as below.  

Q: A crate remains stationary after it has been placed on a ramp inclined at an angle with the horizont...

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Q: 200N 100N 3

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Q: A Chinook (King) salmon (Genus Oncorynchus) can jump out of water with a speed of 5.55 m/s. (See Pro...

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Q: 2. Now, using the simulation and its measuring tool on the upper right side, measure the actual heig...

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Q: Determin

A: when two objects rubbed with each other, there is transfer of electrons from one body to other. the ...

Q: show the complete solution. A 12kg box rests on a horizontal surface with a coefficient of kinet...

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Q: Two spherical objects have masses of 8.1 x 102 kg and 4.5 x 108 kg. The gravitational attraction be...

A: Given data:  Mass of first sphere (m1) = 8.1×102 kg Mass of second sphere (m2) = 4.5×108 kg Gravitat...

Q: entist found evidence that mars may once have had an ocean that is 0.500 km deep. The acceleration d...

A: Given  Depth h = 0.5 km = 500 m  Acceleration due to gravity g = 3.71 m/s2  Density of water = 1000 ...

Q: A person is laying on their stomach doing a hamstring curl.  They go from fully extended (0o) to 130...

A: Angular displacement means the angle by which body rotates around the center of point.  Here , we ne...

Q: An advantage in evaluating surface integrals related to Gauss's law for symmetric charge distributio...

A: According to Gauss's theorem Electric flux linked with Gaussian surface is 1/ε₀ times charge enclose...

Q: We use a mass spectrometer to isolate ?C from "C isotopes to carbon-date an artifact. Carbon atoms a...

A: In this question we have to find the force equation for the velocity selector. Please give positive ...

Q: Q1. As shown in Fig. (1), If us = 0.2 and Hk = 0. 15, Determine: (a) the minimum force F applied on ...

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Q: A platinum bar increases in length by 0.2% when its temperature increases to 222°C. a. Draw the figu...

A: The increase in the length of a bar due to temperature increase is given by ∆L = Lα∆T, where L = the...

Q: Q1) lodine I is widely used in the treatment and diagnosis of the Thyroid gland. The radius (in fm) ...

A: Please note : As per answering guidelines I can answer the 1st question only. Since, this is not a m...

Q: Calculate the repulsive force between-a -1.15X10°C charge and a -1.49x10*C charge if a distance of 2...

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Q: Consider a spherical Gaussian surface of radius R centered at the origin. A charge Q is placed insid...

A: We have a spherical gaussian surface of radius R which is centered at the origin which we can assume...

Q: The light from a mercury lamp is incident on a water film of refractive index 1.33 and thicknesst = ...

A: We need to find a relation between wavelength, refractive index and thickness for reflection of ligh...

Q: 1. Fire the projectile launcher straight upwards (angle = 55°) at 23.0 m/s. Then using kinematics, s...

A: Given : Initial velocity at which the projectile is launced, u = 23.0 m/s Angle of projection, ø = 5...

Q: A 70 kg cyclist develops 210 watts of power while pedaling at a constant velocity of 7.0 m/s east.  ...

A: Given  Mass of cyclist m=70kg Power P=210W Speed v=7m/s  

Q: Electric room heaters use a concave mirror to reflect infrared (IR) radiation from hot coils. Note t...

A: Given that Radius of curvature of concave mirror R = 40.0 cm Image distance di = 3.30 m Object ( coi...

Q: the measured length of a cylindrical laser beam is 12.1 meters, its measured diameter is 0.00121 met...

A: the measured length of a cylindrical laser beam is 12.1 meters, its measured diameter is 0.00121 met...

Q: Why Bohr’s energies for the hydrogen atom are not enough and we require of  quantum mechanics?

A: Niles Bohr did a great work towards the atomic model what no one had been able to do before. Not onl...

Q: Consider the circuit shown in the figure, where E, = 22.7 V, Ɛ, = 12.3 V, and R = 14.0 Q. (Due to th...

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Q: string 30 N m1 m2 In the figure above, two blocks are connected by a massless string and slide along...

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Q: A deep sea diver is working at a depth where the pressure is 4.0 atmospheres. He is breathing out ai...

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Q: A charged particle is moving downward. It creates   a. a magnetic field but not electric.   b. a...

A: Given that charge particle is moving downward.  If it moves in a electric or magnetic field there wi...

Q: 3. What is the electric field potential function for a/an: a. line charge? b. disk of charge? c. cha...

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Q: In the figure below, the deltoid and subscapularis muscles work as a force couple to abduct the arm ...

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Q: Determine whether the block shown is in equilibrium and nagnitude and direction of the friction forc...

A: We know that we have given a figure of an object is on the inclined plane and its places in the equi...

Q: 8) Two blocks of masses m, = 4.85 kg and m, = 5.75 kg kg are on either side of the wedge as shown in...

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