A plank is supported by the floor at one end and a vertical rope at the other end. A person has walked up the plank 7.5 feet and is now 3 feet off the ground. What angle does the plank make with the floor? From a horizontal perspective, how far is the person from the board - contact-point?

Q: 4) A diffraction grating with 1.15x105 grooves/m_is illuminated by 654 nm light. Then, the set-up is…

A:

Q: For hydrogen, find the frequency of light emitted in the transition from the 138th orbit to the…

A: Now the wavelength corresponds to the transition from 138th to 134th lineHence the frequency

Q: Three charged particles are located at the corners of an equilateral triangle as shown in the figure…

A:

Q: Q (-3.0 m, 0) y A B (0, +4.0 m) Ở (3.0 m, 0) (0.-6.0 m) Each Q shown is 60 μC. What work is required…

A: We have to find work done  i.eW=q∆V

Q: The length 3.76 mm is multiplied by 0.0232 mm. The appropriately rounded product is how many square…

A:

Q: Determine the mass moment of inertia of the flywheel shown in the diagram below if the material is…

A:

Q: Ha (femt = 4.57 x 1014 Hz) is emitted from the surface of a neutron star. Its radius is 1.23 x 104 m…

A: We know that  line has a typical wavelength of 656.46 nm in vacuum.Now, according to the question,…

Q: An 6-kg mass is attached to a spring hanging from the ceiling and allowed to come to rest. Assume…

A: As  per data

Q: Assuming that the escape speed of Mars is 4.17 km/s, what is the log10 of the number of molecules in…

A:

Q: 5. Find the final temperature of 100 g copper block that is heated to a temperature of 500° C and…

A:

Q: Consider a configuration with four point charges located at the corners of a square (see figure),…

A:

Q: A stars spectrum emits more radiation with a wavelength of 700.0 nm than with any other…

A: GivenA star's spectrum emits more radiation with a wavelength of 700.0 nm than with any other…

Q: In the figure here, three particles of mass m = 0.030 kg are fastened to three rods of length d=…

A:

Q: A double concave lens has surface radi of 31.4 cm and 28.3 cm. T Part A What is the focal length it…

A:

Q: .A 50.0 kg boy sits on a 40.0 kg sled which is resting on the ice of a pond (zero coefficient of…

A:

Q: The velocity of a 5.00 kg particle is given by 7 = (6.00tî + 5.00t² ĵ) m/s, with time t in seconds.…

A: Solution     Given data Mass m = 5.0 kgVelocity of particle v→=(6ti^+5t2j^)m/sMagnitude of force…

Q: 4. A +3.0 x 10-5 C charged particle with a mass of 2.0 x 104 kg is ejected through the top positive…

A:

Q: Two point charges lie on the $x$ axis. A charge of +9.96 $\mu C$ is at the origin, and a charge of…

A: The electrical characteristic of particles like electrons and protons is described by the…

Q: An object undergoes constant acceleration. Which of the following statement(s) MUST be TRUE? A The…

A: Aceeleration is defined by change in velocity in a short period of time i.e when an object moves…

Q: A funny car accelerates from rest through a measured track distance in time 57 s with the engine…

A: Given,The constant power, The time, The differential amount, The differential time,

Q: In the figure a current i = 19 A is set up in a long hairpin conductor formed by bending a wire into…

A:

Q: (from Ohanian, p 542) A submarine suddenly breaks up at a depth of 142 m below sea level. The air in…

A:

Q: 4(x) =

A: Now here given the values that,a=7.50cm=0.075mProbability 87%=0.87So now we get from normalization…

Q: A 500 g particle oscillating in SHM travels 39 cm between the two extreme points in its motion with…

A:

Q: The spool again The spool is being slightly pulled (not too hard so it doesn't slip) in the exact…

A:

Q: 2. Estimate your own luminosity (in terms of Stefan-Boltzmann law). Express the result in both…

A: The luminosity of a body is the total power radiated by it

Q: The position of a particle is given by the following equation: x = (2 m/s³) t³+ (2.5 m/s) t where t…

A: The position of a particle is given byx(t)=2t3+2.5t where t is in secondsNow the velocity of the…

Q: A 3.0 cm tall object is 15 cm in front of a convex mirror that has a -25 cm focal length. Determine…

A:

Q: Four charges, qa, qb, qc, qd are fixed at the corners of a square. A charge q that is free to move…

A: Based on the description of the question there can be as many as six different cases or scenarios.In…

Q: Two tugboats pull a disabled supertanker. Each tug exerts a constant force of 2.20×106 N, one at an…

A: We will use the concept of work done

Q: An airplane has a mass of 3.61 x 104 kg and takes off under the influence of a constant net force of…

A: Given Data: The mass of the airplane is M=3.16×104 kg.The airplane takes off under the influence of…

Q: A cosmic ray electron (m= 9.1*10-31 kg) moves at 7.13*106 m/s perpendicular to the Earth's magnetic…

A: Mass of electron me = 9.1 × 10-31 kg Velocity of electronve = 7.13 × 106 m/s Strength of Magnetic…

Q: 5) A horizontal wire holds a uniform ball of mass m, and radius R in place on an inclined plane with…

A: Giventhe mass of the ball is mthe radius of the ball is RThe angle of the inclined plane is Need to…

Q: You have enrolled in a scuba diving class and while swimming under water in a nearby lake you look…

A: i=24°

Q: Problem 1: One end of a spring with a spring constant of 159 N/m is held firmly in place, and the…

A:

Q: In exercising, a weight lifter foses 0.107 kg of water through evaporation, the heat required to…

A: Given-the amount of water the weight lifter loses, the work done in lifting weights, the latent heat…

Q: What method of arm pull do you expect to see most of the swimmers using during Swim the Suck…

A: Sculling (S Shaped)During swim the suck most swimmers are likely to use sculling (S-shaped).Sculling…

Q: Needs Complete typed solution with 100 % accuracy.

A:

Q: The force acting on a particle varies as shown in the figure below. (The x axis in the graph has its…

A: (1 smallest division=2.5 m)

Q: A bullet of mass m 8.00 g is fired into a block of mass M 280 g that is initially at rest at the…

A:

Q: Mass m1= 3kg has an initial velocity of V1i = 50m/s and undergoes a 1-D elastic collision with mass,…

A: The collisions are elastc. So momentum and kinetic energy is conserved in these collisions. We will…

Q: 19) This same scenario can be analyzed by using conservation of energy. What type of mechanical…

A: Of course! The interconversion of potential energy, kinetic energy, and rotational energy can be…

Q: Two identical, small insulating balls are suspended by separate 0.31-m threads that are attached to…

A:

Q: While riding in a hot air balloon, which is steadily descending at a speed of 2.39 m/s, you…

A: From kinematics equation we know,                             And,                      where, 'v'…

Q: If a person's body has a density of 991 kg/m³, what fraction of the body will be submerged when…

A: At equilibrium, the upward buoyancy force balances the downward weight of the object.

Q: A charge +q is located at 3.0 cm, a second charge -2q is located at 8.0 cm, and a third charge -q is…

A:

Q: flat plate with surface area of 4.4 m² is sliding on a horizontal table with 4.5 mm thick oil layer…

A: Force F=5.2NSurface area A= 4.4 m^2thickness of the layer t= 4.5mm=dynamic viscosity

Q: A person slides a small ball with speed u along the floor from point A. If x= 3.7 m, R = 1.3 m,…

A: