1. Consider cobalt-60 (60Co) with a half-life of 5.25 years. How many years will it take for its activity to decrease to one-fourth of its original amount? a. Given: b. Formula: c. Solution: d Final answer with unit:

Q: The captain of a ship views the top of a lighthouse at an angle of 60" with the horizontal at an…

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Q: 4. The diagram below represents part of an electric circuit containing three resistors. 3.0 2 4.0 2…

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Q: 18. The ammeter shown in Figure P28.18 reads 2.00 A. Find I, 12, and Ɛ. 7.00 N 15.0 V 5.00 N A 41…

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

Q: All energy interaction between an open system and its surroundings that is not through heat transfer…

A: True All energy interaction between an open system and it's surroundings that is not through heat…

Q: A satellite moves in a circular orbit around Earth at a speed of 5206 m/s. (a) Determine the…

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Q: In 1 minute, a 4.0 A current flows in a simple circuit. How much charge passes through the circuit…

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Q: An electron of mass 9.11 × 10−31 kg and a bowling ball of mass 6.00 kg each have 4.50 eV of kinetic…

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Q: electric generator contains a coil of 130 turns of wire, each forming a rectangular loop 71.3 cm by…

A: electric generator contains a coil of 130 turns of wire, each forming a rectangular loop 71.3 cm by…

Q: A football player kicked a football giving it an initial velocity of 45.2 m/s. The football leaves…

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Q: A spherical capacitor contains a charge of 3.50 nC when connected to a potential difference of 200 V…

A: Givenq=3.5 nC=3.5×10-9 CV=200 vRadius of outer shell, R=4.5 cm=0.045 m

Q: Which of the following describes safeguards used in nuclear power plants to protect the environm I.…

A: Safeguard used in nuclear power plant to protect environment is  Correct answer is  Option i and…

Q: Boyle's law for the expansion of gas is PV = C, where P is the pounds per square inch of pressure, V…

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Q: Which of the following describes advantages of geothermal power? I. Plants require some electricity…

A: The correct option is a)2 It reduces green house gases.

Q: A runner wants to finish a 400 m race in 50.4 seconds. He accelarates from rest and attained his…

A: Runner's constant maximum velocity is 8.421 m/s.

Q: What is a benefit of using bioenergy over nuclear energy? O Bioenergy uses less water and land,…

A: We have to write the benefits of bioenergy over nuclear energy

Q: (a) Determine a differential equation for the velocity v(t) of a mass m sinking in water that…

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Q: A parallel-plate capacitor is constructed of two horizontal 12.8-cm-diameter circular plates. A 1.7…

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Q: Describe the changes in the slopes of V-versus-I graphs as more resistors are connected in (a)…

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Q: A beam of initially unpolarized light passes through a sequence of three ideal polarizers. The angle…

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Q: 9. The waves in the North Sea have an average amplitude of 3 m and wavelength of 30 m. Calculate the…

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Q: An object starting form rest attains a speed of 15.0 m/s in 5.0 s. Find the speed at the end of…

A: Given, final velocity(v) of the particle after moving for 5.0s is 15.0m/s. We know from the…

Q: A bag of wheat weight 130 kg. To what height should it be raised so that potential energy is 150 J ?…

A: Given data :             Potential energy   =   P•E             Acceleration due to gravity    =   g…

Q: A motorcycle, initially at rest, starts to move on a circular track with a 400-m radius. The…

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Q: Activity 2: Problem Solving 1. Figure shows a circuit that contains two batteries and two resistors.…

A: Given, R1=18ohm R2=20ohm We have to apply Kirchoff's current law here

Q: Problem 1: A student kept his 9 Volt, 7Watt radio on at full volume from 9:00 p.m. until 2:00 a.m.…

A: Given : Voltage, V= 9 V  Power, P = 7 W  Radio is on from 9 : 00 p.m. to 2 : 00 a.m.  i.e.  time, t…

Q: A 70-N block and a 35-N block are connected by a string as shown. If the pulley is massless and the…

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Q: A new drug is metabolized by healthy aduits at a rate of 25% each hour. After 2.5 hours, a patient…

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Q: A small loop of area A = 7.6 mm2 is inside a long solenoid that has n = 927 turns/cm and carries a…

A: Answer:-  Given  Area (A) = 7.6 mm2 = 7.6 × 10-6 m2  Number of turns per unit length (n) = N/L = 927…

Q: A rigid steel plate is supported by three posts of high-strength concrete each having an effective…

A: Given Cross sectional area = 40000 mm2 Length = 2 m s = 1mm Stress in the concrete = 20 MPa E of the…

Q: The volume of air in the plastic bag has declined by about 3% as compared to its previous initial…

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Q: What is the difference between conventional current and electron current? What do they have in…

A: Conventional Current- The flow of positive charges in a circuit from positive terminal to negative…

Q: If you mix food in a blender, the electric motor does work on the system, which consists of the food…

A: Given Motor power = 250 W for 40 sec Heat flow out from food to surroundings = 2000 J To find out…

Q: A certain fuel-efficient hybrid car gets gasoline mileage of 35.0 mpg (miles per gallon). (a) If you…

A: Given data as per question mileage=35mpg driving distance =  1000km

Q: You've entered the Great Space Race. Your engines are hearty enough to keep you in second place.…

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Q: A police officer's radar gun emits radio waves at a frequency of 11.9 GHz. What is the difference in…

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Q: x - coordinate: x = -5.00sinwt, where w is constant, x is meters, and t is seconds y - coordinate: y…

A: Velocity Vx=dx/dt  =-5wcoswt  Vy=dy/dt  =5wsinwt

Q: 7. A small metal ball of mass 3 grams is charged with-10 uC. A constant uniform electric field is…

A: Given Datam=3 gram=0.003 kgq=-10μC=-1×10-5Cg=9.81 takenTo FindE=?

Q: Within the green dashed circle shown below, the magnetic field changes with time according to B =…

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Q: A current carrying wire has current flowing in the -x direction. At a point below the wire the…

A: The direction of the magnetic field  due to a long straight wire is given by right-hand rule 2.…

Q: A 200 Q resistor is connected in series with a 4.00 µF capaci and an ac source. The voltage across…

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Q: A ball with a weight of 1.5 N is thrown at an angle of 30° above the horizontal with an initial…

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Q: Determine the amount of heat required to increase the temperature of a 3.82-gram sample of solid…

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Q: Mark and Sam bought a brand new blender to make their favorite slush this summer season. This 2.75…

A: Mark and Sam bought a brand new blender to make their favorite slush this summer season. This 2.75…

Q: An attractive force of 1500 N exist between a 900 nC charge and another charge. The two charges are…

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Q: A 20-A current flow through the wire shown. What is the magnitude of the magnetic field due to a…

A: Given,  dl = 0.05 cm = 5 × 10-4 m rA = 5 cm = 5 × 10-2 m I = 20 A   Using Pythagoras theorem,  rB =…

Q: Part (a) At what positive value of displacement x in terms of A is the potential energy 1/9 of the…

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Q: An oversized yo-yo is made from two identical solid disks each of mass M = 1.90 kg and radius R =…

A: The moment of inertia of the system is 0.0194219 kg.m²

Q: A cylinder with moment of inertia I, rotates with angular velocity wo about a frictionless vertical…

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Q: Derive a law relating the period and length of the pendulum.

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Q: A 300 g mass stretches a spring 50 cm, find the spring constant.

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Atomic Number

Elements are the building blocks of all the matter that exist in the universe. Every element is made up of atoms that have protons, electrons, and a nucleus. In order to know the difference between the elements, an atomic number is used. Every element has its own individual atomic number. The atomic number is a single most important characteristic of an atom.