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Q. The wave function on a taut string is y(x,t) = (0.50m)sin(12 ? t-3 ? x+?/4) where x is in meters and t in seconds.(a)What is the speed and wavelength of the wave?(b)What is the average rate at which energy is transmitted along the string if the linear mass density is 70 g/m? (c)What is the energy contained in each cycle of a wave?
Q. On a workday the average decibel level of a busy street is 69 dB, with 102 cars passing a given point every minute. If the number of cars is condensed to 39 cars every minute on a weekend, what is the decibel level of street?
What is the electric force
A small steel ball with a mass of 80 g is releasesd from a resting height of 1.25 m above a ridgid metal plate. What is the velocity of ball before impact.
If the orientation of the spacecraft is to be changed by 30.0°, for what time interval must the gyroscope be operated.
Use approximate relationships to find the electric field at a point 4 cm from the axis, measured radially outward from the midpoint of shell.
There are four coils of wire being used as electromagnets. They all have the equal size and are made up of the same material but have a different number of loops.
Find the energy of the capacitor at the moment.
A thin, circular disc is made of lead and has a radius of 0.0350 cm at 20.0 °C. find out the change in the area of the circle if the temperature is increased to 625.0 °C. The coefficient of linear thermal expansion for lead is 29.0 x 10-6/C°.
what is the net workdone on the weights.A child slides down a hill on a toboggan with an acceleration of 1.8 m/s2. If she starts at rest, how far has she traveled after following lengths of time.
A 2.0 mL syringe has an inner diameter of 4.0 mm, the needle inner diameter of 0.21 mm, and a plunger pad diameter (where you place your finger) of 1.20 cm. A nurse uses the syringe to inject medicine into a patient whose blood pressure is 140/100. S..
What is the speed of each ball as it strikes the ground? How far apart are the balls 0.700 s after they are thrown.
A 20 {rm kg} child plays on a swing having support ropes that are 2.3 {rm m} long. A friend pulls her back until the ropes are 39.0^circ from the vertical and releases her from rest.
Find the change in momentum of a 1080 {rm kg} car that increases its speed from 5.0 {rm m/s} to 14.5 {rm m/s} in a time of 11 {rm s} while travelling in the same direction.
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