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Q: One of the predicted problems due to global warming is thatice in the polar ice caps will melt and r...

A: (a)Since most of the ice in North Pole is sea ice, melting of this ice cannot affect that much of ch...

Q: How does the tapered rim of a wheel on a railroad train allow one part of the rim to have a greater ...

A: Write the expression for the tangential speed.The tapered rim of a wheel rolling on track is a singl...

Q: A 25.0- µF capacitor and a 40.0- µF capacitor are charged by being connected across separate 50.0-V ...

A: a)the charge on the capacitors is 

Q: How does the thickness of paint sprayed on a surface change when the sprayer is held twice as far aw...

A: If the sprayer is kept at a distance twice as far, radius of the circle painted would also be twice ...

Q: A bicycle is turned upside down while its owner repairs a flat tire. A friend spins the other wheel ...

A: (a). the maximum height reached by the drop depends on the drops vertical speed at the time it leave...

Q: Can a force produce a torque when there is no lever arm?

A: The torque produced is given by

Q: Which will roll down an incline faster a can of water or a can of ice?

A: ofcourse can of water because a can of water has less rotational inertia than the can of ice since w...

Q: Write the necessary equationsof equilibrium of theobject shown in Figure P8.32.Take the origin of th...

A:

Q: Calculate the torque produced by a 50-N perpendicular force at the end of a 0.2m long wrench?

A: Given,            The force, F = 50N            Length of wrench, r = 0.2m

Q: Keratinocytes are the most common cells in the skin’souter layer. As these approximately circular ce...

A:

Q: (a) How much charge can be placed on a capacitor with air between the plates before it breaks down i...

A:

Q: Distinguish between linear momentum and angular momentum?

A: Angular momentum is inertia of rotation motion.Linear momentum is inertia of translation motion.

Q: The following statements are related to household circuitsand electrical safety. Determine whether e...

A: (a).If the circuit breaker is connected in parallel with the outlets, and then current will not flow...

Q: A projectile is launched vertically at 100m/s. If air resistance can be neglected , at what speed wi...

A: For a projectile launched vertically up, the initial speed gradually decreases due to the accelerati...

Q: A 12.0-V battery is connected to a 4.50- µF capacitor. How much energy is stored in the capacitor?

A: The energy stored in the capacitor is given by,

Q: A certain light truck can go around a flat curve having a radiusof 150 m with a maximum speed of 32....

A: The coefficient of friction is given as

Q: Two positive charges each of charge qare fixed on the y - axis, one at y = d and theother at y = -d ...

A: (a) Write the expression for potential energy of the charge 2q

Q: If you were in a freely falling elevator and you dropped a pencill, it would hover in front of you. ...

A: It depends upon frame of reference the person. If you are falling along with the elevator, Force of ...

Q: "How can a projectile "" fall around the Earth""?"

A: As the Earth is curved in shape, its shape supports the motion of the projectile around it. The proj...

Q: When a certain air - filled parallel - plate capacitor is connectedacross a battery, it acquires a c...

A: Write the expression for ratio of charge stored on the two capacitors

Q: A 4.00-kg object is attached to a verticalrod by two strings as shown inFigure P7.69. The object rot...

A: According to Newton’s law, net force acting in x direction is equal to the centripetal force.

Q: An oversized yo-yo is made from two identical solid diskseach of mass M= 2.00 kg and radius R = 10.0...

A: (a). the moment of inertia of the disc and cylinder is

Q: A softball and a basketball start from rest and rolls down an incline. Which ball reaches the bottom...

A: The rotational inertia, for softball,

Q: A 10.0- kg cylinder rolls without slipping on a rough surface.At an instant when its center of gravi...

A: (a) 

Q: Define the following terms: Magnetic poles Magnetic force

A: 1. Magnetic poles are either of the two regions in a magnet where the magnetic induction is concentr...

Q: An 81.5-kg man stands on a horizontal surface. (a) What is thevolume of the man’s body if his averag...

A: (a)The mass of the man is 81.5kg, and the density is 985 kg/m3The volume of the man’s body  is,

Q: (a) Is it possible to calculate the torque acting on a rigid objectwithout specifying an origin? (b)...

A: (a)The torque acting on a rigid body is given by,

Q: A dentist’s drill starts from rest. After 3.20 s of constant angularacceleration, it turns at a rate...

A: Formula to calculate the final angular speed of the drill is,

Q: An archer pulls her bowstring back 0.390 m by exerting a force that increases uniformly from zero to...

A:  Write the expression for spring constant

Q: A length of aluminum wire has a resistance of 30.0 Ωat 20.0°C. When the wire is warmed in an oven an...

A:

Q: What could happen to the drift velocity of the electrons in awire and to the current in the wire if ...

A: Given:Let, the area of cross-section of the wire = ACharge = qCurrent = IResistance = R

Q: A metal hoop lies on a horizontal table, free to rotate abouta fixed vertical axis through its cente...

A: Part A:

Q: Is it possible for a car to move in a circular path in such away that it has a tangential accelerati...

A: The equation for the tangential acceleration is given by

Q: A hiker inspects a tree frog sitting on a small stick in his hand.Suddenly startled, the hiker drops...

A: Here,

Q: What is rotational inertia, and it is similar to inertia?

A: Rotational inertia depends on the distribution of mass about an objects axis of rotation.

Q: Four solid, uniform objects are placed in a container of water(Fig. CQ9.3) Rank their densities from...

A: When an object floats, its weight is equal to the buoyant force acting on it.

Q: Figure P8.29 shows a uniformbeam of mass m pivoted atits lower end, with a horizontalspring attached...

A: a)The mass of the beam is m, horizontal angle is ϴ and distance of the spring is d.

Q: What is law of inertia for rotating systems in terms of angular momentum?

A: According to Law of conservation of angular momentum if there is no unbalanced external torque acts ...

Q: A soap bubble (n =1.33) having a wall thickness of 120 nm is floating in air. (a) What is the wavele...

A: Given:Refractive index of bubble soap (n) = 1.33Wall thickness of bubble soap (t) = 120 nm.

Q: A uniform solid cylinder of massM and radius R rotates on a frictionlesshorizontal axle (Fig. P8.87)...

A: Formula to calculate torque on the cylinder is,

Q: Describe in detail the effects of a magnetic field on a current-carrying wire.

A: Electric energy is carried in the form of current, which is the flow of electrons through a conducti...

Q: Birds resting on high - voltage power lines are a common sight.The copper wire on which a bird stand...

A: Write the expression for the resistance of the wire

Q: A model airplane of mass 0.750 kg flies with a speed of 35.0 m/s in a horizontal circle at the end o...

A: the sum of the tension and sincomponent of the weight is balanced by the centripetal force.the expre...

Q: Radioactive α-emitters are relatively harmless outside the body, but can be dangerous if ingested or...

A: Alpha particles can't penetrate the normal layer of dead cells on the outside of our skin, but they ...

Q: Kinetic energy of an object depends on the refernce frame of observer? Explain.

A: Kinetic energy is related to the motion of the object. Kinetic energy is proportional to square of v...

Q: What does a torque tend to do to an object?

A: A Torque always tries to rotate the object about some point. In other words, we can also say that To...

Q: Earth is not spherical but bulges at the equator. What is the cause of these bulges?

A: Whole earth spins at the same rotational speed.

Q: A typical propeller ofa turbine used to generateelectricity from the windconsists of three blades as...

A: Part A:

Q: Does the string that supports a pendulum bob do work on the bob as it swings to and fro? Does the fo...

A: The string applies a force of tension on the bob, which is perpendicular to the bob. When the bob mo...

Q: The three containers in Figure CQ9.1 are filled with waterto the same level. Rank the pressures at t...

A: Write the expression for the pressure at the bottom of container.

Scalars and Vectors

Scalars and Vectors are the classification of physical quantities that are used to denote various terms in physics.