What are solar cells, how do they work?

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Q: An infinitely long wire carrying a current of I = 2.95 A is bent into the shape shown in the figure.…

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Q: An object is placed 50 cm from a convex lens having a focal length of 13.5 cm. A. Draw a diagram of…

A: The distance of the object u=-50 cm The focal length, f=13.5 cm

Q: A 4.40 mm diameter hole forms in the bottom of a very large cylindrical water tank with an…

A: Given: Diameter of hole in bottom = 4.40 mm= 44 cm Diameter of tank = 4.62 m= 462 cm height of water…

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A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

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Q: For a mole of an ideal gas, the pressure (P), volume (V) and temperature (T) are related by the…

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Q: 1. What kind of mirror does a dentist use when he wants to observe a magnified image of the took,…

A: (1) A concave mirror is a spherical mirror in which light is reflected from the mirror's concave…

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Q: 15. mmh A person exerts a horizontal force of 190 N in the test apparatus shown in the drawing. Find…

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Q: A mass m is attached to a spring with spring constant k on a frictionless table. We stretch and…

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Q: A single conservative force acts on a 5.30-kg particle within a system due to its interaction with…

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Q: The photoelectric effect: a. results in the ejection of electrons by light at high…

A: It is required to choose the correct option from the given about the photoelectric effect.

Q: How should you connect a 4 μF capacitor and an 8 μF capacitor so that the 4 μF capacitor has a…

A: Given,  Two capacitor with rating of 4 microfarad and 8 microfarad. we need to answer--- the…

Q: An object is placed 30 cm to the left of a converging lens of focal length 60 cm. A diverging lens…

A: Solution:-

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Q: tabletop, are applied to the stick in such a way that the net torque is zero. The first force has a…

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Q: The room you are sitting in has a height of 3.6 m. Taking the air pressure at the (ceiling) as…

A: given data: Height of room=3.6 m air pressure=100000 Pa Air density=1.2 kg/m3

Q: oton is placed 86.5nm from a helium nucleus. The gravitational force pulls the proton and neutron…

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Q: A lighter-than-air spherical balloon and its load of passengers and ballast are floating stationary…

A: Acceleration of the balloon in the time (t) sec is  h = u1t+1/2ayt2 h = 0+1/2ayt2 ay =2h/t2 = 2…

Q: Which of the following nuclei is very likely to fission by capture of a thermal nuetron ?  Select…

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Q: You have a string with a mass of 0.0139 kg. You stretch the string with a force of 9.67 N, giving it…

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Q: Physics 121 KIRCHOFF LAWS TYPE PROBLEMS 10.0 Ω www 10.0 V a 5.07 wwww wwww e 15.0 Ω 4.0 V 19 C d +…

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Q: *43. Go The drawing shows two identical systems of objects; each consists of the same three small…

A: a) The moment of inertia of system A and B are given by IA=m1r12+m2r22+m3r32=9×02+6×32+7×52=229…

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Q: If the distance between the plates of an isolated parallel-plate capacitor is doubled, what will…

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Q: A machine part is undergoing SHM with a frequency of 4.40 HzHz and amplitude 1.80 cmcm. How long…

A: Given: Frequency of machine part = 4.40 Hz Amplitude of machine part = 1.80 cm To calculate time…

Q: A 3.90 mm diameter hole forms in the bottom of a very large cylindrical water tank with an…

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Q: Learning Goal: To make the connection between intuitive understanding of a seesaw and the standard…

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Q: A 0.253-kg coffee mug is made from a material that has a specific heat capacity of 944 J/kg C° and…

A: The total heat energy taken by the cup and water Q=mcupCcup∆T+mwaterCwater∆T=mcupCcup+mwaterCwater∆T…

Q: (a) What is the mechanical power output of this engine kW (b) How much energy does it expel in each…

A: GivenT1=74°CT2=360°CQ1=21600 Jt=3 s

Q: Consider the circuit shown below. The cross-sectional areas of the battery, the wire, and the bulb…

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Q: Learning Goal: To make the connection between intuitive understanding of a seesaw and the standard…

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Q: How much energy is needed to raise the temperature of 600 g of water from 25°C to 125°C?

A: Energy needed Q=Q25→100+Qwater→steam+Q100→125

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Q: A tensile test is conducted on polypropylene at different load rates (1 mm/min, 10 mm/min, 100…

A: Young's modulus is a property that's inherent to the material. so the load applied to the material…

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Q: A B R A block of mass 1.5 kg slides without friction around the loop-the-loop apparatus shown above.…

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Q: A baseball approaches home plate at a speed of 48.0 m/s, moving horizontally just before being hit…

A: Given Data mass of the ball m = 145 glet i^ be the unit vector in the direction of + x directionand…

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A: Given Datainitial angular speed ωi = 139 rad/sangular acceleration α = -4.19 rad/s2    (it is…

Q: A 4.32-kg particle is subject to a net force that varies with position as shown in the figure. The…

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Q: An object on a horizontal plane has an initial velocity Vo (6.01+3.0f)m/s at a point where its…

A: Given: Initial velocity vector, v→i=(6.0i^+3.0 j^) m/s Final velocity, v→f=(-8.0i^-4.0 j^) m/s…

Q: A 1.2 m spring is standing on one end. A 60-kg block is placed on the spring, compressing it. What…

A: Given data :- natural length of the spring L0 = 1.2 mmass of the block m = 60 kgspring constant k =…

Q: Disk brakes, such as those in your car, operate by using pressurized oil to push outward on a…

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Q: A block slides down a frictionless ramp while a hollow sphere and a solid ball roll without slipping…

A: Solution: Given: A block slides down a frictionless ramp. Hollow sphere and solid ball roll without…

Q: 94. (a) The mass and the radius of the sun are, respectively, 1.99 × 10³⁰ kg and 6.96 × 108 m. What…

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Half Life

The concept of Half Life has numerous practical applications some of them includes figuring out the effective drug dosage to finding out when a radioactive becomes safe to use. If you look for a career in Nuclear Physics you will need this concept.