An astronomer wishes to make a photon-counting measurement of a star's brightness that has a relative precision of 5%. (a) How many photons should she count? (b) How many should she count for a relative precision of 0.5%?

Q: Vector A measures 1.20m and angles 30° above the x-axis in the first quadrant. Vector B extends…

A:

Q: A ball is thrown directly downward with an initial speed of 8.20 m/s from a height of 30.2 m. After…

A:

Q: Find the unknown quantities for the circuits below using the information provided.

A:

Q: A 26.0-kg block is initially at rest on a horizontal surface. A horizontal force of 76.0 N is…

A:

Q: The following graph depicts the velocity of someone playing tag over a short period of time. Use…

A: "Since you have posted a question with multiple sub parts, we will provide the solution only to the…

Q: Three forces acting on an object are given by F(-1.95 + 5.653) N, ,- (4.75-1.353) N, and 7-(-408) N.…

A:

Q: Two forces lying in the x-y plane are defined by their magnitudes and direction angles, as shown in…

A:

Q: 7. Using graphical raytrace rules #1 and #2, construct the real image formed when an object is…

A:

Q: A 9.00-kg object undergoes an acceleration given by a = (a) Find the resultant force acting on the…

A:

Q: A 4.0 x 104 kg roller coaster starts from rest at point A. Neglecting friction, calculate its…

A:

Q: Figure a below shows two charged particles fixed in place on an x axis with separation L. The ratio…

A: Given Data: The ratio of the charges is 3.30.Separation between the charges is L.The net electric…

Q: Consider three charges arranged in a triangle as shown in Figure 17-28. a What is the net electric…

A: The objective of the question is to find the net electric force and the net electric field on a…

Q: Suppose two children push horizontally, but in exactly opposite directions, on a third child in a…

A: The first child exerts a force .The second child exerts a force The mass of the third child and the…

Q: Below are two velocity vs. time graphs. For each do the following: A. Draw the corresponding…

A:

Q: Solve for the resultant of the following sets of vectors using the specified method for each set. 1.…

A:

Q: Find the x and y components of the electric field produced by 9₁ and 92 in the figure shown below at…

A:

Q: A light ray of given wavelength, initially in air, strikes a 90° prism at P (see Fig. 39-53) and is…

A:

Q: Find the instantaneous velocity of the particle described in the figure below at the following…

A: There are four subparts in this question. However, as per instruction of student, only part (d) is…

Q: A capacitor has parallel plates that have an area of 1.01 cm² and are 1.06 mm apart. There is a…

A: The cross-section area of the plate is 1.01 cm2.The separation between plates is 1.06 mm.The…

Q: Calculate the total electric flux (4D) through the surface of the test tube if there is a free…

A:

Q: This figure (la| = 13.0 m/s2) represents the total acceleration of a particle moving clockwise in a…

A: The free-body diagram is drawn as,a) The radial acceleration is equal to the cos component of the…

Q: The figure below shows three equal positive point charges q located at the corners of a square. a.…

A:

Q: Use the fact that at the critical point the first and second partial derivatives of P with respect…

A:

Q: Particle 1 has a mass of m₁ = 4.00 × 106 kg, while particle 2 has a mass of m₂ = 7.00 × 106 kg. Each…

A: mass of the particles,the initial potential energy of the system, speed of the charge at the final…

Q: In an attempt to escape his island, Gilligan builds a raft and sets to sea. The wind shifts a great…

A: We know the axis orientation as:

Q: O 4-A) A wagon wheel (OD = 23 in; ID = 21 in) weighing 17 lb was allowed to swing as a pendulum…

A:

Q: A steel cable has a cross-sectional area 3.76 x 10-3 m² and is kept under a tension of 3.41 x 104 N.…

A: Cross-sectional area is Tension in cable is Density of steel is Note:Find:Speed of transverse wave…

Q: The block in the figure is given a push up the incline so that its initial velocity is 8.00 m/s.…

A: Speed, u = 8 m/sAngle = 21°The free-body diagram of the cube is shown below.Here, m is the mass and…

Q: C₁ μF 6.00 μF G₂ μF 9.00 V G₁uF

A:

Q: uniform electric field of magnitude 45.1N/C is parallel to the x axis. A circular loop of radius…

A: Givne that -magnitude of the uniform electric field (E) = 45.1N/Cradius of the circular loop (r) =…

Q: What would happen if you changed the dielectric material in your parallel plate capacitor? Would the…

A:

Q: Measure the slope of the line of best fit. Since D = kgd, the slope will equal Va so multiply by Va…

A:

Q: 9. Newtonian mechanics are valid a) in all frames of reference b) in relativistic frames of…

A:

Q: Example 3 Vp = ?? ३१६ Np = 600 turns Each bulb is rated at 6V. Ns = 30 turns Vs = 2 60

A:

Q: How to proof the formula "energy of photon" E (kJ/mol ) = 120000/lambda (nm)

A: We have to prove the formula for the energy of a photon E=120000/lemda, Here E represents energy of…

Q: Two charges +10 μC and +7 μC are placed along the x axis, with the first charge at the origin (x =…

A:

Q: Fundamental Problem 2.3 Figure F₁ F2 ▼ Part A If F₁ = 760 N, F₂ = 620 N, determine the magnitude of…

A:

Q: Three particles are fixed on an x axis. Particle 1 of charge q₁ is at x = - a, and particle 2 of…

A: Given the charge q1 is located at x = -athe charge q2 is located at x = +athe charge +Q is located…

Q: Problem 3 A hollow sphere of mass m and radius R has its center of mass at rest as it spins at a…

A: Mass = mRadius = R

Q: A hockey player is standing on his skates on a frozen pond when an opposing player, moving with a…

A:

Q: A hollow conducting sphere has an inner radius of r1 = 1.4 cm and an outer radius of r2 = 3.5 cm.…

A: The net charge contained by the hollow sphere, the radii within the sphere,

Q: odi ni q6(-6.0μC) are placed inside a cube of 0.5m side. Calculate the electric flux entering the 3…

A:

Q: A hollow sphere of radui R has a uniform nagative surface charge density -\sigma on its surface and…

A:

Q: A 472-Hz tuning fork is sounded together with an out-of-tune guitar string, and a beat frequency of…

A:

Q: This is the x-t graph of the motion of a particle. Of the four points P, Q, R, and S, 1. from t=0,…

A:

Q: Problem 23:   A firefighter, whose mass (including clothing and equipment) is m=�=89 kg, hears the…

A: Mass, m = 89 kgAcceleration, a = 3.51 m/s²Acceleration due to gravity, g = 9.8 m/s²

Q: The position of an electron is given by 7 = 8.66tî − 4.57t²ĵ + 8.69k, with t in seconds and in…

A: Since you have posted a question with multiple sub parts, we will provide the solution only to the…

Q: When a clock reads 4.0 seconds a cart's velocity in the positive x direction is 6m/s When the clock…

A: The initial velocity of the cart is 6 m/s at 4 s.The final velocity of the cart is 10 m/s at 6 s.

Q: an object starts from rest and is subjected to an upward force exactly twice the force of gravity.…

A:

Q: A velocity vector has a magnitude of 1.85 m/s and makes an angle of 155 ̊ with the +x axis.(a)…

A: The objective of the question is to understand the concept of vector components and to calculate the…

Nature of light

Light is transverse and electromagnetic radiation that exhibits the properties of a wave as well as a particle. For this reason, light is said to have a “dual nature.”