During the Apollo XI Moon landing, a retroreflecting panel was erected on the Moon’s surface. The speed of light can be found by measuring the time it takes a laser beam to travel from Earth, reflect from the panel, and return to Earth. If this interval is found to be 2.51 s, what is the measured speed of light? Take the center-to-center distance from Earth to Moon to be 3.84 × 108 m. Assume that the Moon is directly overhead and do not neglect the sizes of the Earth and Moon.

Q: Problem A) At a circus you see a man spinning plates with radii of 75 cm on top of long poles. The p...

A:

Q: Practice Problem 2.12 Find o and uy in the circuit shown in Fig. 2.43. Also cakulate i and i, and th...

A: The circuit is shown in Figure 1.

Q: 4- Find the value of reflection coefficient if the power reflected and power forward are equals ( 20...

A:

Q: A positive point charge Q = 2.5 x 10-C is fixed at the origin of coordinates, and a negative point c...

A:

Q: 13. A 7.5 kg backpack is sliding across the floor. The coefficient of friction between the backpack ...

A: Solution

Q: When removing a wool sweater, a static discharge of 8.03 µC dissipates 7.32  10-3 J of energy. What ...

A:

Q: Research on energy systems in environment

A: Solution: Research on energy and environment

Q: A wave is described by y(x,t) = 0.1 sin(3x – 10t), where x is in meters, y is in centimeters and t i...

A: The given data are listed below with appropriate variables. Here, y denotes the displacement in the...

Q: Derive the following equation Ide xR HP 4ス R

A:

Q: a) Show that in one dimensional conservative force i.e., F(x) = -VU. b) The potential energy for for...

A:

Q: An  image projected by a convex lens is   A. virtual and inverted.   B. Real and upright...

A: Required : An  image projected by a convex lens is :

Q: 2-(0.4kg) A particle was Hanged, calculate the angular velocity, frequency and periodic time. (K = 2...

A:

Q: 6. Three identical particles of mass m and charge q each are fixed at the vertices of an equilateral...

A:

Q: (2) A source is positioned 20 m horizontally from the base of a building and illuminates the vertica...

A: The luminous intensity is given by,  L.I=LΩ Here, L.I is the luminous intensity, L is the illuminanc...

Q: At 1 PM until 3 PM an airplane is heading north at 800. km/h, then it changed velocity to 750. km/h ...

A:

Q: Why Angular acceleration does not change with radius, but tangential acceleration does? cite an exam...

A: The angular acceleration is given by,  α=∆ω∆t Here, ∆ω is the change in angular velocity and ∆t is t...

Q: The spring is unstretched at the position x = 0. Under the action of a force P, the cart moves from ...

A:

Q: If 100 J of heat is added to a system that does no external work, by how much is the internal energy...

A: Given : Heat = 100 J  

Q: Convert to SI units, using any convenient prefix like μ, m, c, k, M, G, etc. Show how you did it, di...

A:

Q: A 70 kg mountain climber dangling in a crevasse stretches a 50-m-long, 1.0-cm-diameter rope by 8.0 c...

A: The given data are: m=70 kgL=50 md=1 cm=0.01 mΔL=8 cm=0.08 m Here, m denotes the mass, L denotes the...

Q: (28) (a) How many molecules are there in 1 L of air at a temperature of 27 °C? (b) How many kilomole...

A:

Q: (a) It is difficult to extinguish a fire on a crude oil tanker, because each liter of crude oil rele...

A: Given Data: The energy released is, Q = 2.80 x 107 J. The initial temperature of water is, T = 20°C...

Q: Kindly answer it 1-7 thank you.

A: We are allowed to give the explanation of first question only which is given below.  Please repost t...

Q: Please I need a surely answer and a quicker response

A:

Q: The distance between two magnetic poles is doubled. Then the force between them a. Decreases by four...

A:

Q: The jib crane is pin connected at (A) and supported by a smooth collar at ( B ). determine the react...

A:

Q: Two charges q1 = +5 µC and q2 = +8.5 µC are separated by a distance of 15 cm. Point P is located alo...

A: Using Electric force of attraction between two forces concept to solve the problem

Q: A bicycle of 40 Kg is racing in a circular track at a velocity of 20 ms. If the radius of curvature ...

A:

Q: Find the volume of 2.40 mol of gas whose temperature is 50.0 oC and whose pressure is 2.00 atm.

A: Temperature of gas: T = 50 oC = 50 +273K = 323K Pressure of gas: P = 2.00 atm Number of moles of gas...

Q: Light of wavelength 520nm falls on a slit that is 3.20 ? 10^3 ?? wide. Estimate how far the first br...

A: Given data: Wavelength of light is, λ=520 nm=520×10-9 m. Slit width is, d=3.20×10-3 m. Distance from...

Q: T2.12 Please help me answer this physics question.

A: Given, the mass of the box is =m=5 kg acceleration of box=a=4.3 m/s^2 let tension on the rope is T N

Q: Explain the various kinds of patterms in use. What are the allowances provided, when making a patter...

A: A pattern is a replica of the object to be cast, used to prepare the cavity into which molten materi...

Q: Illustrated in Fig B, are two identical balls in vacuum, each of mass 0.10 g. They carry identical c...

A: For the balls to be balanced, the Coulomb force should balance the tension's horizontal component. L...

Q: PROBLEMS 01: An electron starts from rest at the negative plate separated by 2 cm and having a poten...

A:

Q: A motorcyclist runs out gas on a level road 250 m from the gas station. she pushes the 220 kg motorc...

A:

Q: 1. Anobjectis moving at a constantspeed of 15m/s, (a) Howfarwillyoutravel in 2.0 seconds? (B) If tim...

A:

Q: two point charges are separated by a distance of 10 cm. Charge on point A =+9 μC and charge on point...

A: Given: Distance between the charges = 10 cm The value of charge on point A = 9 μC The value of charg...

Q: Superconductors conduct at   A. Zero resistance and infinite current.   B. Zero resistan...

A: Answer --------- (A) Zero resistance and           infinite current.  Superconductor are material th...

Q: T2.14 Please help me answer this physics question.

A:

Q: The force system shown below has a resultant of 2OON pointing up along the Y- axis. Compute the valu...

A:

Q: The following 10 measurements of the freezing point of aluminum were made using a platinum/rhodium t...

A: Given Data set is - 658.2  ,  659.8 ,  661.7 ,  662.1 ,  659.3 ,  660.5 ,  657.9 ,  662.4 ,  659.6 ,...

Q: A weight 100.0N, hangs from the centre of a rope so that both ends of line hang down making a 60° an...

A: In this scenario, the sum of the tension's vertical components balance the weight. 2Tsinθ=mg Rearran...

Q: If the resultant of the two forces and couple M pass through point O, determine M 150 mm 150 M- 60 m...

A: Drow a free body diagram and resolve all the given components of force along vertical so that we can...

Q: The cylinder on a lathe has a radius of 2cm and the radius of the handlebar is 40 cm. Calculate the ...

A: Given data: Radius of cylinder on lathe is, r1=2 cm=0.02 m. Radius of handlebar is, r2=40 cm=0.4 m. ...

Q: 14. One pole strength is doubled and the other is halved, then the force between them is a. Decrease...

A: Force (F) = μoqmqm/(4πr2) .....(1) When one pole strength is doubled and other is halved than F = μo...

Q: What is the energy of the electron in the Hydrog en atom aft er absorption an electro- magnet ic wav...

A:

Q: T2.6 Please help me answer this physics question.

A:

Q: What is the trajectory of a circular motion? Please I need a quicker response

A: The object is said to be in an uniform circular motion if the speed of the object moving in the circ...

Q: Physics Question

A: Brightness of bulb is related to the power which is given by      P=I2 R Where I is current through ...

Q: 15. Define with sketch the Hot-chamber machines

A: to understand about the hot chamber machines first we have to understand basically what is meant by ...