1. 2. 3. What is the focal length of -4.50 D lens? Where is the focal point in the above lens and is it in front of or behind the lens? Would the image in the above lens be real or virtual?

Q: Find the sound level in dB of 5.52  10-2 W/m2 ultrasound used in medical diagnostics.  _____dB

A: Given  Intensity (I) = 5.52 × 10-2  W/m2    sound level in dB  is defined as :- L = 10 Log [ I /Io]…

Q: If the battery in the circuit below is 2.18V, resistor R₁-29.902, and resistor R₂=16.10, what is the…

A: GivenV=2.18 VR1=29.9 ΩR2=16.1 Ω

Q: Q2. a) Explain why the static electric field is always zero inside an isolated conductor. What is…

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Q: What is the change in internal energy of a system that takes in 4.48 x 106 J of heat, and does 4.50…

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Q: what is the density of air at 1500m above sea level and 20C?

A: for air density at 1500m we have to find atmospheric pressure at 1500 m . then we find air density.

Q: mpt in Progress In the figure, five long parallel wires in the xy plane are separated by distance d…

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Q: A 290-turn solenoid having a length of 26 cm and a diameter of 8.3 cm carries a current of 0.33 A.…

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Q: A child rides a toboggan down an icy hill all the way to the bottom. If the hill is frictionless and…

A: (as per rules i can give answer only first  question. ) a child rides toboggan down all the to the…

Q: You are hiking to the top of a small canyon. When you stop for a rest you decide to shout "hello"…

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Q: Given that: 1. The deceleration of the train = 0.145 ms2 2. The train will further travel a…

A: here give some values as  a = -0.145 m/s2  d = 26.65 m t = 38.34 sec  Vinitial =    20 km/hr Vfinal…

Q: Q5. In the circuit shown if the wire used was L-100 cm long, E=1.2 V, R-2 kn, R-3 kf, and the…

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Q: Required information A 274-V emf is connected to the terminals A and B. V= B 15,00 ww R. Here, V =…

A: The circuit is shown below.

Q: resistance

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Q: The values for a, b, c and d are: (Enter the four values without spaces.)

A: power =force * velocity

Q: For the circuit shown, the power dissipated in the load resistance R, is given as a function of R…

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Q: What is synchronous speed in (rpm and rps)for a three-phase 50-Hz induction motor if it has 8…

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Q: You are using a hydrogen discharge tube and high quality red and blue light filters as the light…

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Q: A thick-walled wine goblet can be considered to be a hollow glass sphere with an outer radius of…

A: the outer radius of glass sphere R = 4.10 cm the inner radius of glass sphere r = 3.60 cm refractive…

Q: Light travels a distance of 0.884 m in 2.00 ns in a given substance. What is the index of…

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Q: The formula v = 0.03 t can be used to calculate the tangential acceleration of an automobile moving…

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Q: Use the following information to answer parts a–b. The strings in a compound bow behave…

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Q: 16. Two point charges q1 = 2.40 nC and q2 = -7.00 nC are 0.100 m apart. Point A is midway between…

A: Given data, Charge q1=2.40 nC Charge q2=-7.00 nC Distance between charges (d)=0.100 m Distance…

Q: Satellite data taken several times per hour on a particular albatross showed travel of 1200 km over…

A: Given:Distance is 1,200 km and the time is 1.4 days.

Q: Two coils are at fixed locations. When coil 1 has no current and the current in coil 2 increases at…

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Q: 4-Wheatstone Bridge: The shown figure below is a Wheatstone-bridge set up. At a length x the…

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Q: Among the following four ray diagrams select the two correct ones. TE 2F I = = || IV

A: For light rays passing the lens or mirror, it follows two relations 1. Rays parallel to the…

Q: Three point charges q1 = 64 mC, q2 = -25 mC and q3 = -4 mC are placed at the vertices of a right…

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Q: kinetic energy in eV

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Q: In the figure, a metal rod is forced to move with constant velocity along two parallel metal rails,…

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Q: You switch from a 60x oil immersion objective with an NA of 1.40 to a 40x air immersion objective…

A: Given data NA=1.40 Index of refraction, n=1.51

Q: The instantaneous velocity (in m/s) at time t = 0.3 s has the magnitude of: a) 15.0 b) 10.0 c) 12.5…

A: Concept: The instantaneous velocity is the velocity of an object at a particular time. Velocity is…

Q: 10. (3) Using the same formula for the speed of sound in question temperature outside if your friend…

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Q: Four capacitors are connected as shown in Fig. 1.  C1 = 4.50 μF, C2 = 7.50 μF, C3 = 2.50 μF and C4 =…

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Q: The definition of a collision has always confused me.

A: Collisions are the intercommunication between two bodies that occur for a short interval of time,…

Q: The Nardo ring is a circular test track for cars. It has a circumference of 12.5 km. cars travel…

A: Given :The cirsumference is 12.5km,Speed of the car is 100km/h and time is15min.

Q: A 1.30 kg sample of water at 13.0°C is in a calorimeter. You drop a piece of steel with a mass of…

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Q: A ray of light would change direction when: (Check all that apply)

A: Introduction: A line perpendicular to the wave fronts of light is known as a light ray, and its…

Q: What is the resistance (in ) of a 21.5 m long piece of 27 gauge copper wire having a 0.361 mm…

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Q: Gives theoretical framework of Optical disc to improve efficiency of solar panel.

A: Energy conversion theoretical limits for various PV device concepts :Theoretically, many models were…

Q: On a hot day, the temperature on the Fahrenheit scale changes by 100F. Calculate thecorresponding…

A: Conversion formula from farenhite to kelvin is F=95k-273·15+32 Which can be rewritten as…

Q: An eagle flying at 28 m/s emits a cry whose frequency is 370 Hz. A blackbird is moving in the same…

A: Given:-  The velocity of the eagle fly is v = 28 m/s  The frequency of the cry is f = 370 Hz.  The…

Q: An object with a height of 30 cm is placed 2.1 m in front of a concave mirror with a focal length of…

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Q: Which of the following is an example of heat transfer by radiation? When you walk on your tiled,…

A: There are three distinct modes of heat transfer namely conduction, convection and radiation. The…

Q: a) Diffraction is due to the wave nature of light and occurs due to the deviation of light from the…

A: Diffraction occurs when light deviates from the straight path when passing through a small aperture…

Q: a).The displacement at any given time of an object is r = 6 sin 98t where the symbols have their…

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Q: In collision theory, it is supposed that the rate ___________ that occur with at least the kinetic…

A: Collision theory explain about the reactions that occurs at different rates and suggest a way to…

Q: can this be rewritten in a legible way so i can understand how you got 335m

A: Index of refraction,n=1.79 Velocity of light,c=3×10⁸ m/s Time travelled by light,t=2×10^-⁶ s

Q: The figure shows a circuit containing an electromotive force, a capacitor with a capacitance of C…

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Q: the speed of a skyrocket is measured and found to be 236.42 m/s. what is the rockets speed in km/hr?

A: Given data:  Speed (v) = 236.42 m/s Required: Speed in km/hr

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.