Rez Req=?

Q: The height of the center of gravity of a man is determined by letting him lie on a board that is bal...

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Q: During a certain workout, you noticed that a 20-kg plate (say, positioned 45 cm from the center) was...

A: In this question we are given that during a certain workout, you noticed that a 20-kg plate (say, po...

Q: Please choose which among the equations is the a. Resonant, undamped forced oscillation b. Nonreso...

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Q: A uniform rod is set up so that it can rotate about an axis at perpendicular to one of its ends. The...

A: Given: mass of rod m = 1.09 Kg           length of rod L =0.769 m           initial angular speed ωi...

Q: What is the smallest size crater on the moon? 240 km 24 km 2.4 km 1 km much smaller than 1 km

A: The moon is full of craters of various sizes.

Q: Evaluate the volume between the surface z = 3 + 2x + xy, and the rectangle in the xy plane given by ...

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Q: A pressurized can of paint contains a fixed mass of gas at an internal pressure of 1.124 atm at 24.5...

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Q: How to charge an electroscope by contact and induction? Thanks!

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Q: mass is indestructible, but what are exceptions to this?

A: Mass is indestructible like energy .Mass is the amount of substance contained by the substance.

Q: 3. During the filming of a movie a 100kg stunt man steps off of the roof of a building and free fall...

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Q: Three (3) Samples, A, B, and C, have the following condition: PA > PB > PC- EVALUATE THE STATEMENTS....

A: Density = mass/volume 

Q: 20.0-g ball is attached to a 120-cm-long string and moves in a horizontal circle   (see Figure P5....

A: In the question it is given that a 20 g ball is attached to 120 cm long string and moving in a horiz...

Q: A ray hits an object at 15° from the vertical. If the material has index of refracti 1.5, what is th...

A: Dear student,  Since all questions are different as per guidelines we can author only first one plea...

Q: How are the principles of physics applied in building these kinds of structures ( pyramid in egypt, ...

A: Principles of Physics applied in building Pyramid in Egypt : Strong granite stones were used to cons...

Q: The triceps muscle in the back of the upper arm extends the forearm. This muscle in a professional b...

A: Given data: Force (F) = 2167 N Perpendicular lever arm = 2.15 cm = 0.0215 m Angular acceleration (α)...

Q: Question 4 (1 point) A 2.4 kg fish swims at 1.9 m/s and swallows a 0.98 kg fish that is at rest. Wha...

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Q: Suppose you have a concave lens of focal length f 23.0 cm. An object of height 5.0 cm is placed 33.0...

A: Given : focal length of concave lens, f = 23 cm Distance of object from lens, u = 33 cm Height of ob...

Q: A particle is moving in a straight horizontal line with constant deceleration 4 ms2. At time t = 0 t...

A: In this question we are given that a particle is moving in a straight horizontal line with constant ...

Q: nort Answer Questions: (2 points) Jimena says that an object rolling down the side of a hill is an e...

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Q: A 20 kg traffic light hangs midway on a cable between two poles 40 meters apart. If the sag in the c...

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Q: Determine the magnitude of the buoyant force acting on the object immersed in the water below. (Note...

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Q: 7.60 . CP A sled with rider having a combined mass of 130 kg trav els over a perfectly smooth icy hi...

A: Given: The intial speed of the sled with the rider is 22.5 m/s. The mass of the system is 130 kg. Th...

Q: 1. The coefficient of kinetic friction between the bL plane in Fig. 6 below is 1/6. Find (a) the acc...

A: Given: The coefficient of the fiction is 1/6. m1=2.5 kgm2=2 kg The free-body dagram.  

Q: The system show beside is initially at rest. The coefficient of static friction is 0.20. The coeffic...

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Q: Ra =1.5 0 R=1.2 0 6 V R=0.4 0° R3=1.8 Q R=0,8 Q Figure 4 State two (2) differences between resistanc...

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Q: You charge an initially uncharged 72.9 mF capacitor through a 27.9 N resistor by means of a 9.00 V b...

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Q: How much thermal energy (in J) is required to boil 2.25 kg of water at 100.0°C into steam at 145.0°C...

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Q: A turntable that is initially at rest is set in motion with a constant angular acceleration 5.78 rad...

A: Given  Initial angular velocity ωi=0rad/s Angular acceleration α=5.78rad/s2 no of revolutions N=9  a...

Q: An object that has kinetic energy must be (A) Moving (B) Falling (C) At rest (D) None of these

A: Given:  Object has kinetic energy, the kinetic energy of the object is not equals to zero.

Q: A proton and anti-proton with rest energy 8f, 3.0 108 What is the relative speed of positron and ele...

A: Given:

Q: In the context of the penetrating power of various forms of ionizing radiation, alpha particles can ...

A: Alpha particles have less penetrating power and can't penetrate even outer dead layer of skin. So it...

Q: An investigator finds a fiber at a crime scene that he wishes to use as evidence against a suspect. ...

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Q: The number of collisions between helium atoms with the walls of the container per unit time is... A...

A: The number of collision is depends upon the temperature.

Q: Determine the angle α , and then the intensity of the pull on the two cables Tca and Tcb, for which ...

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Q: What is the impulse on the brakes of a 872 kg car that takes 16 seconds to stop? (hint: find Fw firs...

A: Weight is also a kind of force which is experienced by the acceleration pull due to gravity. Impulse...

Q: During a very cold winter, water pipes sometimes burst. Why? (A) The ground contracts when colder, ...

A: In winter water pipe brust because when water freeze at 0°C it expand

Q: Three wires are connected at a junction. One of the wires carries a current of 4 A into the junction...

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Q: Steam expands behind a piston doing 67,800 joules of work. If 12.7 kJ of heat is radiated to the sur...

A: Given ∆Q=-12.7kJ∆W=-67.8kJ   

Q: An auto mechanic needs to determine the emf and internal resistance of an old battery. He performs t...

A: Emf=11.8v Current=17.7A

Q: A coil with a self-inductance of 2.0 H carries a current that varies with time according to ?(?)=(2....

A: when the current passing through the coil changes  then the emf is induced in the coil  which is giv...

Q: A uniform rod is set up so that it can rotate about an axis at perpendicular to one of its ends. The...

A: Given Data Length of the rod is l=0.893 m Mass of the rod is m=1.19 kg Initial angular speed of the ...

Q: A disc of mass M and radius R is rolling without slipping. The ratio of its rotational kinetic energ...

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Q: b) Find the commutator relation 1) [Z², L,] 2) [H,x]

A: (1)          [ z2, Lz] = [zz,Lz]              = z[z,Lz] + [z,Lz]z But,   [z,Lz] = 0 then,          [...

Q: A television set draws 13 A in a conventional 120 V home. How much power does it use

A: Given data :                Current  , I = 13 A                Voltage, V = 120 volt Formula :      ...

Q: 3. A ray of light crosses from a flint glass slab at 20° from the normal into air. At what angle doe...

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Q: 1. A stone is thrown vertically downward at an initial speed of 14 m/s from a height of 65 m above t...

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Q: Six uncharged capacitors with equal capacitances are combined in parallel. The combination is connec...

A: Given data:  Six capacitors having equal capacitance are connected in parallel combination  Initiall...

Q: A 15.0-g bullet is accelerated from rest to a speed of 780 m/s in a rifle barrel of length 72.0 cm. ...

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Q: The speed of sound in air is 340 m/s. What is the wavelength of a soundwave that has a frequency of ...

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Q: Blood pressure is normally taken on the upper arm at the level of the heart. Suppose, however, that ...

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Relativistic Energy and Momentum

According to classical physics, time flow is the same for every observer. But according to einstein's theory, time flow is different for different observers. The idea that time flow is not the same for all may sound strange because we may not experience this effect in everyday life. This effect is only observed when an object moves with some velocity comparable to the velocity of light. This velocity is termed relativistic velocity.