Alice is moving with 0.8c towards a mirror. She sends a light pulse towards the mirror when she is at a distance L from the mirror. Bob is at rest with respect to the mirror and is observing this experiment. After how long will Alice receive the reflected pulse, as measured by Alice and Bob?

Q: A particle known as a pion lives for a short time before breaking apart into other particles. Suppos...

A: According to the theory of relativity, the time dilates for a body moving with speed comparable to t...

Q: A walkway suspended across a hotel lobby is supported at numerous points along its edges by a vertic...

A: Given info: Before loading, the diameter of the steel cable is 1.27 cm and the length of the steel c...

Q: Calculate the following and express the answer in the proper number of significant figures: (3.245x0...

A: calculation

Q: Look at the picture

A:

Q: In SI units, the electric field in an electromagnetic wave is described by E, = 106 sin(1.40 × 10’x ...

A:

Q: Look at the picture

A: Given: The angular velocity of both motorcycles are same. The Radius of first motorcycle r1=15 m The...

Q: A race car starts from rest on a circular track. The car increases its speed at a constant rate at a...

A: Given:- car increase at constant rate is 4.25 times around the track θ = ?

Q: A thermometer reading 63° Fis placed in an oven preheated to a constant temperature. Through a glass...

A: Initial thermometer reading, Ti = 63°FThermometer after 0.5 min, T1 = 233°FThermometer after 1 min, ...

Q: I know the answer is B. I just don't understand how to get it.

A:

Q: Consider a series RC circuit as in Figure below for which R =4.0 M), C=6.0 µF, and ɛ=33.1 V. Find th...

A: According to Kirchhoff's voltage rule the sum of net potential difference across each element of a c...

Q: For the following circuit in the figure below, find the power (in units of Watt) delivered to the 2R...

A:

Q: A wire (mass = 50 g, length = 40 cm) is suspended horizontally by two vertical wires which conduct a...

A: Free body diagram of a system is as follows:

Q: An ideal spring is connected to a mass m on a horizontal frictionless surface. If- SHM according to ...

A: Given mass connected to spring is 'm' and equation of the SHM x(t) = 10 cos (2πt - 2.0)     

Q: Find the gravitational potential energy of the child-Earth system

A: Potential energy of system (child +earth ) relative to lowest position  is taken zero (reference poi...

Q: A 52.1 cm-long pendulum takes 2.50 minutes to undergo 104.6 complete back-and-forth cycles.   (a) C...

A: Given   Length of pendulum ,L = 52.1cm Time to complete 104.6 cycles = 2.50 minutes  

Q: A piece of copper whose density is 8.93 g/cm3 has a mass of 180 g in air and 162 g when submerged in...

A: Density of copper is ρ=8.93 g/cm3 Suppose that, density of the liquid is ρl Mass in air is ma = 180 ...

Q: Your 5G phone is sending an RF signal at a wavelength of 5.72 mm. What frequency is the wave (in gig...

A: Wavelength of signal= 5.72mm

Q: A ring of radius 7 m lies in the x-y plane, centered on the origin. The portions of the ring in the ...

A: gravitational field at point P, E=Grρ1πR+ρ2πRR2+r23/2

Q: Problem 1: Object 1 is located at position (2, 3)?. Object 2 is located at position (8, 11)?. a) Wha...

A: Given: object 1 is located at (2,3)  Object 2 is located at (8,11)  To find the displacement vector ...

Q: An electron undergoes simple harmonic motion with the acceleration shown below: ax(t)=−amaxsin(2t/T)...

A: Given that acceleration of a electron ax(t)=−a max sin(2t/T) a max = 5839 m/s2 time period T = 316 S...

Q: For the following circuit in the figure below consider the direction of the current given. Determine...

A: The equivalent resistance of resistors connected in parallel is given as:1Rp=1R1+1R2+1R3+... The equ...

Q: Help

A: length of wave (λ) = 0.001 m speed (v) = 4 ms  

Q: A pond with a flat bottom has a surface area of 810 m 2and a depth of 2.5 m. On a warm day, the surf...

A: The rate at which heat is transferred by conduction is given as Qt=kATh-TcLHere Q is the heat transf...

Q: A potassium surface is illuminated by a monochromatic laser light with a wavelength of 400 nm. Deter...

A: When light of wavelength λ is incident on a metal surface that has a work function W, the maximum ki...

Q: Task #2: Two charged objects (X and Y) are placed at a distance of 0.40 m from each other. The charg...

A: calculation

Q: Starting from rest, a solid disk rolls down 3.00 m along a plane inclined at 25.0 degrees with respe...

A: Please see the free body diagram and the work attached in step2. Important points: 1) Here you have ...

Q: What power of spectacle lens is needed to correct the vision of a nearsighted person whose far point...

A: calculation

Q: Calculate the final speed of a 110-kg rugby player who is initially running at 8.00 m/s but collides...

A:  We have the equation Favg∆t=I Where  I is the impulse Favg is the average external force acting on ...

Q: A lobster tank in a restaurant is 0.75m0.75m long by 0.5m wide by 40cm deep.Taking the density of wa...

A:

Q: Point a is on the +y-axis at y = +0.200 m and point b is on the +r-axis at z = + 0.200 m A wire in t...

A: point a (0,0.2) m point b (0.2,0) m B = 0.8 T  (magnetic field) Current (I) = 4.50 A   

Q: Draw (or describe) three different ways to connect three resistors in combinations of series and par...

A: Resistance in series  Rs = R1 + R2  Resistance in parallel  Rp = R1 R2 /R1 R2

Q: A beam of light is incident on a hemispherical prism at an angle, theta, as shown in the figure. If ...

A:

Q: The wave speed on a string is 775 m/s periodic waves are generated on that string by an oscillator w...

A: Speed of wave= 775m/s Period of oscillation= 1.55 × 10-4 s

Q: Question II A 3.79 kg mass is dropped from a height of 3.11 m onto a spring with k = 1830.00 N/m in ...

A: Mass , M = 3.79 kg Height , h = 3.11 m  Spring constant , k = 1830 N/m To find = Maximum displacemen...

Q: The end of a diving board undergoes simple harmonic motion with the velocity shown below: vy(t)=vmax...

A:

Q: Draw light ray diagrams for each case.

A: There are five cases are given for the position of the object, that are,   Case 1: The object’s posi...

Q: A 3kg mass with an initial velocity of (4î)m/s collides with and sticks to a lkg mass with a initial...

A: MASS  m1 = 3 Kg initial velocity  v1 = 4 i  m/s mass m2 = 1 kg initial velocity v2 = (- 4 j ) m/s co...

Q: A uniform meter stick is in equilibrium at the 61.3 cm mark with a mass of 50.0 g hung at the 90.0 c...

A: Mass of stick m = 127 g

Q: What type of lens is also known as a “converging lens”

A:  Answer is   Convex Lens   Explanation : A lens which converges the rays incident on it is called co...

Q: Look at the picture

A: The angular acceleration of the pulley can be given by α=τI=FrI

Q: Consider a series RC circuit as in Figure below for which R 4.0 MO, C-60 uF, and c-23.1 V. Find the ...

A:

Q: For safety in climbing, a mountaineer uses a nylon rope that is 65 m long and 1.4 cm in diameter. Wh...

A: In the question given the length of rope , diameter of rope , mass and change in the length and we h...

Q: A object of mass 1.82 Kg, attached to a spring, is displaced 3.30 m to the right from its equilibriu...

A: Given :     Mass of object, m = 1.82 kg     Displacement, A = 3.30 m     Spring constant, k = 5.00 N...

Q: Find the tensions in the two cords and the accelerations of the blocks a

A:

Q: Physics Question

A:

Q: he rectangular loop of wire shown in the figure (Figure 1) has a mass f 0.12 g per centimeter of len...

A: Given:- The mass per unit length is 0.12 g/cm  The current of the wire I = 9.0 A  The plane makes an...

Q: A straight wire length 0.20 m moves at a steady speed of 3.0 ms-1 at right angles to magnetic field ...

A: According to Faraday's law when there is a change in the magnetic flux passing through a closed surf...

Q: magnitudes and directions of the vectors are given in the first screenshot

A: |FPQ| = 14.4 N and direction is 53.13o form x-axis. |FQR| = 24.0 N and direction is -90o from x-axis...

Q: 2. A standing wave in a 9m rope has a frequency of 28 Hz at the second harmonic. a. What is the freq...

A: Length of rope L = 9 m frequency of 2 nd harmonic f2 = 28 Hz let  ,    velocity of wave = Vw       f...

Q: The table below describes the characteristics of images formed by four optical instruments. Which of...

A: