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Q: If the net work done on an object is negative, then the kinetic energy of the object: a. is zero b. ...

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Q: After 3 half lives a radionuclide is reduced in activity to what percentage of its initial activity?...

A: Scenario- A radionuclide's activity is reduced  after consecutive half lives. Given :  Number of hal...

Q: What is the speed at the ground of an object that falls freely from height of 25m?

A: Given: The height of fall is 25 m.

Q: Problem 23: Using special téchniques called string harmonics (or "flageolet tones"), stringed instru...

A: Since you have posted a question with a multiple sub parts, we will solve first three sub - parts fo...

Q: Two small containers, each with a volume of 100 cm3, contain helium gas at 0°C and 1.22 atm pressure...

A: From ideal gas law, PV=nRT The initial conditions of pressure, temperature and volume for the two ga...

Q: An electron is to be accelerated in a uniform electric field having a strength of 2.00×106 V/m.What ...

A: ∆U=-Ed=-2.00×106 V/m0.400 m=-0.80×106 V

Q: Define apparent and real depth.

A: Depth is the distance between the two end surfaces of a medium. The real depth refers to the actual ...

Q: A block of mass m(0.5kg) slides along a frictionless track with speed vm. It collides(an elastic one...

A: (given) Mass of sliding block = 0.5 kg Mass of stationary block = 0.25 kg R is the radius of the blo...

Q: You move a 200 kg box along a flat surface by pushing it horizontally with a force of 1500 Newtons. ...

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Q: The total mechanical energy of an isolated system is conserved as long as nothing in the system is m...

A:   The total mechanical energy of system is the some of the kinetic energy and potential energy. the ...

Q: could you help me in this question

A:

Q: 16) A 10 g bullet in motion, with 1000 m / s hits and passes through a 2.0 kg block initially at res...

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Q: How much energy is produced when the Sun converts 1 kg. of its mass into energy?

A: It is given that, m=1 kg

Q: What force is required to pull a dog in a wagon along a level sidewalk, as in the following figure, ...

A: we know that in order to maintain a constant speed the acceleration of the object should be zero. Fr...

Q: On a 2-day trip, you average 80 kph for 11 h on the first day and 120 kph for 7 h on the second day....

A: av.speed=total distancetotal time=v1t1+v2t2t1+t2

Q: #= 19.93

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Q: Different colors of light correspond to different light   Question  options:   frequen...

A: Light splits into seven different colors which are violet , indigo , blue , green , yellow , orange ...

Q: A Styrofoam cup holding 142 g of hot water at 1.00 ✕ 102°C cools to room temperature, 21.0°C. What i...

A: Here,  Q=mc∆T=142×10-3 kg4186 J/kg·°C100°C-21°C=46958.548J

Q: Describe circular motion.

A: Circular motion is described as a movement of an object while rotating along a circular path. Some o...

Q: 7. Two cars are traveling around identical circular circuits. A car A travels at a constant speed of...

A: Given: Constant speed= 20 m/s acceleration speed= 40 m/s

Q: solve the problem shown in the image:

A: The net force in the horizontal direction of block is Fnet=Fcosθ-f=Fcosθ-μkMg=20 Ncos30°-0.33 kg9. 8...

Q: A teenager is pushing a cart.  There is no friction between the cart and the ground. Mass of the car...

A: Given, A teenager is pushing a cart on a frictionless surface and mass of cart is 120 kg

Q: A 20 gallo automobile gasoline tank is filled exactly to the top at 0 oF just before the automobile ...

A: The volume of the oil, Voil=20 gallon=20 gallon×3.78541 L1 gallon=75.71 L   The initial temperature,...

Q: 11) A ball of mass 3.0 kg is suspended by two cables attached to a horizontal arm, which in turn is ...

A: Scenario - A ball is suspended with two cables and it is rotating uniformly due to which it experien...

Q: A hollow ball with a diameter of 3.82 cm has an average density of 0.0835 g/cm3. What force must be ...

A: The weight will reduce in water due to buoyancy  Volume of ball is  43 π r3  = 43 x 3.14 x 3.82 x 10...

Q: In the following figure, it is called n=?? mode of standing wave? options:   n=2 ...

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Q: 1. A) How much diesel fuel (gallons) is required to move a unit train (100 cars) with 125 tons of fr...

A: The number of cars, n is 100. The mass of each car, m is 125 tons. The distance covered, d is 517 mi...

Q: A 5.0 kg mass is falling from a height of 10.0 m with a speed of 2.0 m/a what is it's totally mechan...

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Q: R2 R1 R3 R4 V Rs R6 In the above circuit, R1 = 100, R2 = 200, R3 = 150, R4 = 50, R5 = 300 and R6 = 4...

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Q: Describe projectile motion.

A: The path covered by the projectile is called a trajectory and the object moves in the curved path. T...

Q: An object moves in simple harmonic motion described by the equation d = 5 cos at, where t is measure...

A: Simple Harmonic equation has general form as given below: d=acosωt       ..... 1 Given : d=5cosπt Co...

Q: There can be multiple answers to this question.

A: slit width or separation = d distance of screen from slit = x fringe spacing = y Using formula, for ...

Q: Towns A and B in the figure below are 80.0 km apart. A couple arranges to drive from town A and meet...

A: Triangle Law of vectors. If two vectors can be represented both in magnitude and direction by the tw...

Q: Can an object have zero velocity and nonzero acceleration at the same time? Yes O No

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Q: 14. In the figure, a constant external force P = 130 N is applied to a 20-kg box, which is on a roug...

A: Given:  External force, P=130 N Block's mass, m=20 kg Displacement, d=8.0 m Time interval, t=7 s

Q: could you help me with these please

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

Q: How much thermal energy (in J) is required to boil 2.45 kg of water at 100.0°C into steam at 135.0°C...

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Q: What is the force of gravity acting on an object at the Earth’s surface? Earth’s mass = 5.98 x 1024 ...

A: Given: Mass of the earth = 5.98 x 1024 Kg Mass of the object = 1000 Kg The radius of the earth = 6.3...

Q: The car speed in the figure is v = 0.3 (9t2 + 2t) m / s it moves on for a short time. The unit of t ...

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Q: please help me with these, i am trying to use this to study.

A: Using Wien's law, the expression for find temperature is λ=bTT=bλ

Q: Suppose an object is placed on a ramp at an angle from the horizontal. The direction of the NORMAL F...

A: An object is placed at some angle from the horizontal.   

Q: A copper rod and an aluminum rod of equal diameter are joined end to end in good thermal contact. Th...

A: The rate of energy transfer for aluminum rod is given by PAl=kAlAT-TAlLAl The rate of energy transfe...

Applications Of Reflection Of Light

When a light ray (termed as the incident ray) hits a surface and bounces back (forms a reflected ray), the process of reflection of light has taken place.

Sign Convention for Mirrors

A mirror is made of glass that is coated with a metal amalgam on one side due to which the light ray incident on the surface undergoes reflection and not refraction.