emf

Q: Two narrow slits are separated by a distance of 1.2×10−4m. They are illuminated by the light from a ...

A: Distance between the slits=1.2x10-4m Wavelength=λ=589×10-9m angular position of the first-order maxi...

Q: Is every emf a potential difference? Is every potential difference an emf? Explain.

A: The potential difference and EMF are the two different quantities. The EMF is the electromagnetic fo...

Q: A dentist’s mirror is placed 2.0 cm from a tooth. The enlarged image is located 5.6 cm behind the mi...

A: distance of object, p = - 2 cm  distance of image, q = 5.6 cm

Q: Describe the Exponential Behavior?

A: To describe: Exponential behaviour. First we need to understand the exponential functions. A growth ...

Q: means the repair work done to keep the system in good working condition.

A: To determine: What means the repair work done to keep the system in good working condition.  

Q: An FM radio station broadcasts at a frequency of 91.5 MHz. If you drive your car toward thestation a...

A: Given The frequency of the FM radio station is f=91.5 MHz=91.5×106 Hz. The velocity of car or absor...

Q: Suppose a VLC unit uses an LED that produces light with anaverage intensity of 400 mW/cm2. What is t...

A: Average intensity, I = 400 mW/cm2 = 4000 W/m2

Q: (II) A 975-kg sports car accelerates from rest to 95 km/h in6.4 s. What is the average power deliver...

A: Final velocity, v=95 km/h=26.4 m/s Initial velocity, u=0 Mass, m=975 kg Work done is equal to change...

Q: Explain how the energy of an electromagnetic wave depends on its amplitude, whereas the energy of a ...

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Q: A typical hard disk in a computer spins at 5400 rpm.a. What is the frequency, in rev/s?b. What is th...

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Q: A bullet of mass 20 g with a velocity of 500 m/s collides with a 1 kg block which is atrest on an in...

A: Given, a bullet of mass  m=20 g = 0.020 kg with a velocity of 500 m/s collides with a M=1 kg block w...

Q: An immersion heater used to boil water for a single cup of tea plugs into a 120 V outlet and is rate...

A: Given The voltage of the heater is V=120 V. The power of the heater is P=300 W. The power of heate...

Q: A wheel of radius R, mass M, and moment of inertia I is mounted on a frictionless, horizontal axle a...

A: Consider the equilibrium of the mass 'm' and resolve the forces vertically. ma=mg-T                 ...

Q: A single frictionless roller-coaster car of mass m= 200 kg tops the first hill with speed vo = 16.0 ...

A: mass, m =  200 kg , height at A = h = 60 m, velocity at A, v = 16 m/s  height at B, h' = h/2 = 60 m 

Q: A seagull can fly at a velocity of 9.00 m/s in still air. (a) If it takes the bird 20.0 min to trave...

A: (given) Velocity of seagull bird with respect to air (VBA) = 9 m/s                                  ...

Q: A 0.60 kg object is swung in a vertical circular path on a string 0.80 m long. If its speed is 6.00 ...

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Q: What is the resistance of a 20.0-m-long piece of 12-gauge copper wire having a 2.053-mm diameter?

A: length, L = 20 m  diameter, d = 2.053 mm  resistivity = 1.7 x 10-8 ohm m 

Q: (III) In the Bohr model of the hydrogen atom, an electron orbits a proton (the nucleus) in a circula...

A: Radius of orbit (r)=0.53×10-10 m Charge on an electron (e)=1.6×10-19 C Coulomb's constant (k)=9×109 ...

Q: A typical diamond is cut as shown. A ray of light has entered the flat window at the top of the diam...

A: Any diamond is made in such a way that it would shine easily due to its surface. This phenomena is d...

Q: Aparticle of charge 1.5 x 10-8 C experiences an upward force of magnitude 1.5 x 10¯° N when it is pl...

A: q =1.5 x 10-8 C , Force, F = 1.5 x 10-6 N 

Q: Jane is using a 14 cm long screwdriver to assemble a bookcase. She applied a force of 45 N to rotate...

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Q: 5. Angle between two vectors A and B is 0. Then what is the meaning of A cos 0? (A) prjection of B i...

A: Dot product of two vectors 

Q: Consider two masses connected by a string passing over a pulley having a moment of inertia I about i...

A: The two blocks are connected with each other with a rope, so the linear velocities of both the block...

Q: The three resistors shown are connected to a 12 V battery. What current is provided by the battery?

A: voltage, V = 12 V R1 = 58 ohm R2 = 70 ohm  R3 = 42 ohm

Q: A 140 g baseball is moving horizontally to the right at 35 m/s when it is hit by the bat. The ball f...

A: mass, m = 140 g  initial velocity, u = 35 m/s  final velocity, v = - 55 m/s at 25 degree above horiz...

Q: Find the vectors whose lengths and directions are given. Try to do the calculations without writing.

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Q: 1. ssm The space shuttle travels at a speed of about 7.6 X 10³ m/s. The blink of an astronaut's eye ...

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

Q: Vision is blurred if the head is vibrated at 29 Hz because the vibrations are resonant with the natu...

A: frequency, f = 29 Hz  mass, m = 7.5 g 

Q: An airplane pilot sets a compass course due west and maintains an airspeed of 220 km/h. After flying...

A: Given Data: The velocity of the airplane along west is, v = -220 i^ km/h. The time is, t = 0.5 h. T...

Q: A schoolyard teeter-totter with a totallength of 6.4 m and a mass of 41 kg is pivoted at its center....

A: (a) Where should a parent push vertically downward with a force of 210 N in order to hold the teeter...

Q: Rain is falling vertically downward and you are running for shelter. To keep driest, should you hold...

A: The vector diagram for the velocity of men (vmen) and velocity of rain (vrain ) is given as, Consid...

Q: A15 kg object has velocity of V which it has a velocity of V object during this time interval? 5j m/...

A: Given: initial velocity, vi = 5j m/s final velocity, vs = 6i + 12j m/s time interval, t =  sec