f= PN 60 where f-frequency in hertz P= number of pairs of poles N= revolution per minute

Q: Suppose the wheel of Dan’s bike is 70cm in diameter. It’s turning at a rate of 50 revolutions per…

A: In this question we have to find the linear speed in cm per minute.

Q: You have your ear against a new speaker when it emits a sounds with an intensity of 160 decibels

A: 1)Sounds below 70db don't cause any hearing damage.   2) Beyond 70db sounds isn't good for your ears…

Q: A street light is at the top of a 19 ft tall pole. A woman 6 ft tall walks away from the pole with a…

A:

Q: A rock concert was measured to be 6.9 x 10-6 watts/cm2. Find the number of decibels for the power of…

A: Given The given intensities of the sound is 6.9×10-6 watts/cm2. Apply formula For decibel level…

Q: "A Kite 65 feet above the ground moves horizontally at a speed of 6 ft/s. At what rate is the angle…

A: Given a kite 65 feet above the ground moves horizontally at a speed of 6 ft/s.

Q: A hot air balloon rising upwards is noticed by an observer who is 4 miles from where it is released.…

A: Given that a hot air balloon is rising vertically and being tracked by an observer located 4 miles…

Q: (a) If your car's instruments are properly calibrated, how many times should your you are travelling…

A: In this question we will use basic of algebra i.e concept of speed and distance. We will simply find…

Q: A bird 150 ft above the ground flies horizontally at a speed of 11 ft/s. At what rate is the angle…

A: Given Data: The height of the bird above the ground is: y=150 ft The speed of the bird is: x'=11…

Q: Two trains on separate tracks move toward each other. Train 1 has a speed of 120 km/h; train 2, a…

A: Given that, frequency of horn of train 2 is 500 Hz, velocity of train 2 is 91 km/hr,  velocity of…

Q: A rock concert was measured to be 8.1 x 10-6 watta/cm2. Find the number of decibels for the power of…

A: A rock concert was measured to be 8.1 x 10-6 watta/cm2.