The young player is playing the cello at 2 meters from the ear of the instructor. The sound level the instructor perceives is 70 dB 1) What will be the sound level the audience will perceive at a distance of 10 meters? Find your answer with a decimal point accuracy (XX.X dB) 2) For the audience to perceive a Sound Level of 70 dB, how many players playing cello need to be playing together? Round up to the next integer number (can not be X.X players!!!)

Q: ich form of radiation has longer wavelength, ultraviolet or infrared? Explain your reasoning. Select…

A: Which radiation ,Ultraviolet or Infrared, have longer wavelength.

Q: A 5.0-kg block moves in a straight line on a horizontal frictionless surface under the influence of…

A:

Q: Would it be a minus sign instead of a positive one ?

A: Yes , it would minus sign.  Complete solution is below.

Q: Determine the values of I,12, and I3 that satisfy the following three equations. -1.20/, + 12 + l3 =…

A:

Q: 4. The Earth is (approximately) a sphere of radius 6.37 x 106 m. (a) Find the circumference of the…

A: Radius, r = 6.37×106 mCircumference, C = ? Surface area, A = ?

Q: 3. A bicycle wheel of radius 0.70 m is rotating at an angular speed of 6.3 rad/s as it rolls on a…

A: Given:-  The radius of the wheel of the bicycle is r = 0.70 m  The angular speed of the bicycle is…

Q: Q1: A) A copper tape has a length 30 m in a winter day when temperature is (-10 ° C) .how much…

A: Length , L = 30 m T1 = -10 °C = 263 K T2 = 40 °C = 313 K Thermal expansion , α = 17 x 10-6 K-1

Q: If the Cartesian coordinates of a point are given by (-1, y) and its polar coordinates (r, 120°).…

A: given that    Cartesian coordinate =( -1 , y )  put  X = -1    Y = y polar coordinate =( r, 120°)…

Q: Eing (Āx C) - (Č × B) given the following vectors: A = 21 + 5) B = -31 – j+ 2k Č = 1+ 4] ... А 51 B…

A: Vectors, A= 2i^+5j^, B = - 3i^-j^+2k^  and C = i^+4j^

Q: Projectile Motion I A projectile is launched at the angle 35° from the horizontal with velocity…

A:

Q: 20. v How many significant figures are in the following numbers? (a) 78.9 ± 0.2 (b) 3.788 × 10º (c)…

A: Given  To find out the significant figures

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A: Given data:  Mass (m) = 75 kg Coefficient of kinetic friction of steel on ice (μk) = 0.01 Required:…

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A:

Q: Three point charges are located on a circular arc as shown in the given figure. (a) What is the…

A:

Q: A B 2.2. Two objects, A and B are treated as a single system. The table to the right shows some of…

A: Solution to Sub part (d) is added in next step.

Q: b) A small rectangular coil of 6 mm by 6 mm is placed in the middle of a solenoid of 40 mm length…

A: According to the guidelines I can solve only one question here,  (b) Therefore according to the…

Q: The electron in a hydrogen atom is in the state |v) = N[3]v100) + 4 |w211)] where ynlm represents…

A: Given: |ψ>=N3|ψ100>+4|ψ211>N=15Now, H will be Hamiltonian of |ψ> ifH|ψ>=E|ψ>For…

Q: How many unique junctions are in the circuit? □ (a) 0; no junctions. □(b) 1 □ (c) 2 □ (d) 3 □(e) 4…

A:

Q: If you throw a rock straight down with a speed of 12.2 m/s off a cliff and it lands 8.55 seconds…

A: It is given that, u=12.2 m/st=8.55 sa=-g=-9.8 m/s2

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A: The fermi energy is defined as the energy of the topmost filled level in the ground state of the N…

Q: (a) What energy is dissipated by a lightning bolt having a 20,700 A current, a voltage of 117 MV,…

A: Solution: as given I = 20700 A V = 117 MV t = 1 ms

Q: 3A) One (1) mole of an ideal gas receives an input of 630J of energy in the form of heat. The gas…

A: In the question given value of ideal gas receive energy and work done and we have to find ----- a)…

Q: 3. A wire is stretched horizontally between two poles that are 8.0m apart. When a 50.ON weight is…

A:

Q: Problem 2: A 50 gram ball 1s thrown against a wall at 5 m/s. A The ball hits the wall and then…

A: Consider the ball is thrown to the right (positive) or moving towards is positive  and rebounds to…

Q: Let a = ci + j and b = 16i + 12j. Find c π so that the angle between a and bis Round your answers to…

A: Given: a=ci+jb=16i+12j The angle between a and b is π6.

Q: Shown below is a graph of velocity-versus-time for a moving object. What is the acceleration of the…

A: From the graph, the acceleration is the same from t = 5.0 s to t = 7.0 s.

Q: In physics and mechanics, mass distribution is the spatial distribution of mass within a solid body.…

A: Linear Mass Density: Represents how mass is distributed along a one-dimensional object. In this…

Q: equations satisfies

A:

Q: Can you solve the option C plz thx

A: (c) Given: a=0.541 nm Introduction: In the above figure the fractions denote the height above the…

Q: Your answer is partially correct. A small object has a mass of 3.0 × 103 kg and a charge of -41 uC.…

A:

Q: separated by 8.50 cm, is 8.00 × 10

A: Given: Distance is 8.5 cm or 8.5×10-2m Electric field strength is 8×104V/m

Q: Problem 4: Four point charges of equal magnitude Q = 35 nC are placed on the corners of a rectangle…

A: Recall F=KQ1Q2/r2 As per given data and diagram.

Q: solve the sub-part (b) only.

A:

Q: Use the determinant of a matrix to find the area of the triangle whose vertices are (6, -1), (8,5),…

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Q: 1) While diving in Cancun, Mexico, where the seawater has a density of 1,015 kg/m³, Nana observed…

A: Given, Density = 1015 Kg/m3 Pressure P = 3.75 atm = 3.75 x 101325 = 379968.75 Pa

Q: 3. A batted baseball is hit with a speed of 45 m/s starting from an initial height of 1 m. Find how…

A: 3) given     initial speed u =45m/s    height y0=1m a) when ball hits directly upward   angle of…

Q: Problem 7: Two positively-charged balls with equal amounts of charge and mass m = 4.5 g are…

A: Given:both balls have equal masses and charges,mass, m = 4.5 g = 4.5×10−3 kglength of thread, L =…

Q: The output voltage of an AC generator is given by Av = (1.21 x 102 V)sin(40zt). The generator is…

A: ∆V = (1.21 × 102V)sin(40πt)

Q: A physical pendulum consists of an 85-cm-long, 240-g-mass, uniform wooden rod hung from a nail near…

A:

Q: 8. The two 35 kg blocks are pushed apart by the 15° wedge of negligible weight. The angle of static…

A: Given that: m=35 kgθ=15°α=11°μ=tanα=tan11°=0.194 To determine value of P at which the blocks start…

Q: 7 cubic foot container

A: Given: Volume of a container as V=7 ft3 Find: Volume in units of m3

Q: Problem 5: A rectangular loop with L1 = 0.65 m and L2 = 0.35 m is sitting in a magnetic field B =…

A:

Q: 7. The Daytona 500 stock car race is held on a track that is approximately 2.5 mi long, and the…

A:

Shock Waves

Shock waves are common in continuum mechanics, and their dominance is attributable to the fact that they are stronger (or even less) compressible. Substantial perturbations propagated as sudden dynamic changes of a compressible medium supersonically. Shock waves are all around us in our daily lives. Lightning, earthquakes, volcanic eruptions, and meteorite impact all produce them in nature. Even the earth, which is protected by its magnetic field, generates a shock wave as in solar wind that travels around 20 Earth radiuses. These shock waves might be either constant, linked to the body, or unsteady, i.e., moving around with time. All of the shocks mentioned above can be damaging, so precautions must be taken to reduce their impact.