Physics Question

Q: A certain toaster has a heating element made of Nichromeresistance wire. When the toaster is first c...

A: Part (a)The expression of power of toaster is expressed as

Q: Can an object move along a curved path if no force acts on it? Defend your answer.

A: According to Newton’s first law of motion, an object will continue to move with constant velocity in...

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 stone is thrown upward at an angle. What happens to the vertical component of its velocity as it r...

A: When a stone is thrown upward at an angle, its velocity has two components, that are horizontal and ...

Q: Two astronauts(Fig. P8.80), each having a mass M, are connected by a ropeof length d having negligib...

A: (a)

Q: Starting from Ohm’s law, show that E = Jρ, where E is themagnitude of the electric field (assumed co...

A:

Q: The arm in Figure P8.17 weighs 41.5 N. The force of gravity acting on the arm acts through point A. ...

A: Draw the free body diagram of the arm and show the components of the forces Ft and Fs as well.

Q: Is it an inward or outward force that is exerted on the clothes during the spin cycle of an automati...

A: when the clothes pulled inwards in the automatic washing machines experinces a centripetal force. If...

Q: Consider the circuit shown in Figure P18.11. Find (a) thepotential difference between points a and b...

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: A spacer is cut from a playing card of thickness 2.90 x 10-1 m and used to separate one end of two r...

A: a)Number of phase reversals can be found from the condition of destructive interference.

Q: A light rod of length 2L is free to rotate in a verticalplane about a frictionless pivot through its...

A: Given,The masses are m1, m2 and the total length of the rod is 2L.

Q: A 500.-N uniform rectangular sign 4.00 mwide and 3.00 m high is suspended from ahorizontal, 6.00-m-l...

A: Given data:Weight of the rectangular sign = 500 NWeight of the rod = 100 NLength of the rod,  = 6.00...

Q: Which of either has greater momentum: a 1kg ball moving at 2m/s or a 2-kg ball moving at 1m/s? Which...

A:

Q: Why do you do no work on a 25-Kg bagpack when you walk a horizontal distance of 100mm?

A:

Q: What are units of measurements for rotational speed?

A: The representation of the rotational speed is

Q: Two capacitors, C1 =18.0 µF and C2 = 36.0 µF, are connected in series, and a 12.0-V battery is conne...

A: Given:C1 = 18 μFC2 = 36 μFApplied voltage = 12 V

Q: A student and his lab partner create a single slit by carefully aligning two razor blades to a separ...

A: (a). the angle to the first minimum in the diffraction pattern  can be calculated as follows,

Q: A short circuit is a circuit containing a path of very low resistancein parallel with some other par...

A: Consider a short circuit in a lamp cord.The two conducting wires touch each other and leads to a low...

Q: A person notices a mild shock if the current along apath through the thumb and index finger exceeds ...

A: Maximum current to avoid the shock = 80 uADry skin resistance = 4×105 ΩWet skin resistance = 2 ×103 ...

Q: The cost of electricity varies widely throughout the UnitedStates; $0.120/kWh is a typical value. At...

A: Given:Cost of electricity = $0.120 per kWh

Q: A strut of lengthL = 3.00 m and mass m =16.0 kg is held by a cableat an angle of θ = 30.0°with respe...

A: Part A:

Q: A war-wolf, or trebuchet, is a device used during the MiddleAges to throw rocks at castles and now s...

A: Given:Length of the rod = 3 mm1 = 0.120 kgm2 = 60.0 kgDistance of axle from the larger mass = 14 cm

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: The current supplied by a battery in a portable device is typically0.15 A. Find the number of electr...

A:

Q: One end of a uniform4.0-m-long rod of weightw is supported by a cableat an angle of θ = 37° withthe ...

A: Given:μs = 0.50Length of the rod, L = 4m

Q: A dead battery is charged by connecting it to the live batteryof another car with jumper cables (Fig...

A:

Q: A object of mass 3.00 kg is subject to a force Fx that varies with position as in the figure below. ...

A: Given,

Q: A tungsten wire in a vacuum has length 15.0 cm andradius 1.00 mm. A potential difference is applied ...

A: Part A:

Q: With respect to spring and neap ocean tides, when are the tides lowest? That is, when is it best for...

A: The rise or fall of the surface of the ocean occurs due to the gravitational pull of Moon either in ...

Q: Given three lightbulbs and a battery, sketch as many differentcircuits as you can.

A:

Q: (a) Find the current in an 8.00 - Ω resistor connected to a batterythat has an internal resistance o...

A: Write the expression for current through the resistor .

Q: A parallel-plate capacitor has plates of area A = 7.00 X 10-2 m? separated by distance d = 2.00 X 10...

A: (a)The capacitance of the parallel plate capacitor when it filled with air (kair = 1) can be calcula...

Q: Is the acceleration due to gravity more or less atop Mt Everest than at sea level? Defend your answe...

A: Write the expression for gravitational acceleration

Q: The large quadriceps muscle in the upper leg ter- Quadriceps - Tendon minates at its lower end in a ...

A: The forces are resolved into components parallel and perpendicular to the tibia, the magnitude of th...

Q: Why do passengers in high altitude jet planes feel the sensation of weight while passengers in an or...

A: Passengers in an orbiting space vehicle are essentially falling towards the Earth. It’s being pulled...

Q: A lens made of glass (ng =1.52) is coated with a thin film of MgF2 (ns = 1.38) of thickness t. Visib...

A: (a) Minimum value of t is,

Q: Why does bending your legs when running enable you to swing your legs to and fro more rapidly?

A: Rotational inertia is the resistance to a change in rotational motion, which is similar to plane ine...

Q: The resistivity of copper is 1.70 x 10-8 Ω ⋅ m. (a) Find the resistanceof a copper wire with a radiu...

A: (a). The resistance of the wire is

Q: Under what conditions could a fast moving car remain on a banked track covered with slippery ice?

A: The horizontal component of the normal reaction on the car provides a centripetal force to turn the ...

Q: What happens to the strength of the gravitational field at the surface of a star that shrinks?

A: The gravitational field strength is increase at the surface of a star that shrinks.

Q: A student sits on a rotating stool holding two 3.0-kg objects.When his arms are extended horizontall...

A: m = mass of each object = 3.0 kgr = distance of objects from axis of rotation = 1 mIoi = moment of i...

Q: 2. Two transverse mechanical waves, y1(x,t) and y2(x,t), are present on a string that is fixed at bo...

A:

Q: Use conservation of energy todetermine the angular speed of thespool shown in Figure P8.58 afterthe ...

A: The gravitational potential energy of the bucket is converted as sum of rotational and translational...

Q: Metal sphere A of radius 12.0 cm carries 6.00 µC of charge,and metal sphere B of radius 18.0 cm carr...

A:

Q: An aluminum wire having a cross - sectional area of4.00 x 10-6 m2 carries a current of 5.00 A. The d...

A: The number of electrons in the wire is

Q: The resistance betweenterminals a and b in FigureP18.13 is 75 Ω. If the resistorslabeled R have thes...

A: Given,The resistance between the two points a and b is 75.0 Ω.

Q: Two resistors, R1 and R2, are connected in series. (a) If R1 =2.00 Ω and R2 = 4.00 Ω, calculate the ...

A:

Q: Why is it easier to carry same amount of water in two buckets, one in each hand, than in a single bu...

A: It is easier to carry two buckets of water in one hand , than to carry only one hand because the cen...

Q: At 20.0°C, the carbon resistor in an electric circuit connectedto a 5.0 - V battery has a resistance...

A: