The amplitude of a sound wave is measured in terms of its maximum gauge pressure. By what factor does the amplitude of a sound wave increase if the sound level goes up by 64.0 dB?

Q: Find the angle made by the vectors A and B given below A=(2,1,3). B=(3,-2,1).

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Q: 10. Conservative or Not Conservative F(x, y) = аxi + аy) x2 + y2

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Q: 81. Work is a transfer of * a. energy O b. force C. mass O d. motion

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Q: A fisherman pulls in a huge fish and uses a balance with a single weight of mass 1.67 kg to balance,…

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Q: Describe stable and unstable equilibriums.

A: Equilibrium is a state of a a system that does not change. There are two kinds of equilibrium stable…

Q: A casting of mass 150 kg is lifted 4 meters in 15 seconds by means of a crane. What is the power?

A: Given data The mass of the casting is given as m = 150 kg. The casting is lifted up to h = 4 m. The…

Q: 5. bhat power in KW 1s Kupplied to a 12 hp mo tor having an effiaenay of qo percent chen it is…

A: Input powerPin. Given, motor horsepowerhp=12 hpefficiencyη=90%=0.90

Q: . What is the van moving KE of a 3 500 kg at 65 km/h?

A: Given data:  Mass of the moving van (m) = 3500 kg Velocity (v) = 65 km/h Required: The Kinetic…

Q: What lever class has the fulcrum situated between the force and the load? a. second-class lever b.…

A: In first - class lever the fulcrum situated between the force and the load.

Q: 1. What amount of work is done when a 5 newton object is moved a distance of 10 meters?

A: Given data:   Force (F) = 5 N Distance (d) = 10 m Required: Work done (W)

Q: 8. What is the kinetic energy of a 1200 kg car travelling 90 km/h?

A: Given: The mass of the car is 1200 kg. The speed of the car is 90 km/h.

Q: 2. How much work is done by 15 kW engine during 3.5 min?

A: Given value--- power = 15 kW. time = 3.5 min . We have to find--- work ?

Q: If the scalar product of two vectors is equal to the magntitude of their vector product, what is the…

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Q: The dot product of a̟ · a, is equal to: a. sin 0 cos o b. sin ø cos e c. cos o cos 0 d. sin ø sin 0

A: The unit vector ar in cartesian coordinates is given by

Q: 4. How long is the time required to consume a power of 213 J/s generated by a working motor that…

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Q: 82. Raising a table requires work. Raising it twice as high requires O a. half as much work O b. the…

A: Raising a table required work if raising it twice as high required. The correct option is  Twice the…

Q: 0. is defined as the rate at which work is done

A: We know that power P=Wt Rate of doing work.

Q: 2.5' m

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Q: Mechanical energies

A: Kinetic

Q: 28. How much work is done lifting a 3-m chain over the side of a building if the chain has mass…

A: Required : Work done in lifting a chain.

Q: 10. The power of a motor is 40 kW. At what speed can the motor raise a load of 20,000 N ? Ans. 2 ms

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Q: How much work is done by a machine to lift 750 kg of bricks to a height of 8.2 m?

A: Work done = gain in the potential energy by the bricks = m×g×h Here, m= 750 kg            g= 10 m/s2…

Q: When is potential energy largest? Why?

A: Potential energy of any object is the energy possessed by the object by virtue of position (or…

Q: If the dot product of two vectors is positive, does this imply that the vectors must have positive…

A: Dear student The dot product is defined as : A.B = AB×cos¢ Where, ¢ = Angle between the vectors

Q: Determine the Support reaction s. (Point A is o pinned ro ler support ond Point B is (+scddns 9N…

A: A support reaction is a force that is applied to a support or a resultant restraining end moment…

Q: When is kinetic energy largest? Why?

A: Introduction: Kinetic energy is defined as the energy of an object due to its motion.

Q: 2m Şekil-3 The system to which a 10 m long homogeneous rod with a mass of 50 kg is connected is in…

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Q: (a) The cylinders A-D shown below are all made from copper. Rank them in order of increasing…

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Q: 9. When a load of 10 kg is hung from the wire, then extension of 2 m is produced. Then work done by…

A: We have a load of mass m=10 kg which is hung from a wire casing an extension of h=2 m and…

Q: 10. How much work is done to accelerate a 2,500 kg car from rest to a velocity of 27 m/s?

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Q: A cannonball is launched diagonally with an initial horizontal velocity of 38.0m/s. Label the…

A: (1) Given: The initial horizontal velocity is 38.0 m/s. The angle of launch is 23.0°.

Q: 3.The Work-Energy Principle states that work is equal to the change in kinetic energy. What unit…

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Q: Give an example of a dynamic equilibrium & explain

A: Given: Give an example of a dynamic equilibrium & explain

Q: 4. What is the Kinetic Energy of a 1200 kg object that is moving with a speed of 24 m/s?

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Q: What is the work done by the walking man that uses a power of 24 J/s in 45 sec? handwriting answers

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Q: 1. How much power is required when using a 12 N force to push an object at a velocity of 3 m/s?

A: Given data :  Force "F"= 12N  Velocity "v"= 3m/s

Q: An a particle (a helium nucleus (two protons and two neutrons)) is travelling through a bubble…

A: Given data: Magnetic field, B=0.5 T Radius of the circular path, r=174 μm=174×10-6 m Our question…