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Describe the method used to measure the Sun's shadow and in the drawing on page 18 what are the letters b and d used for?
A truck rests on a bridge span whose length between support is 120 feet. Find the upward force exerted by each support pier on the bridge
A piano tuner plays an out of tune A note on his piano and then strikes his 440 Hz tuning fork. What was the frequency of the note before he loosened the string
A converging lens is placed 20.0 cm to the right of a diverging lens of focal length 5.0 cm. Calculate the focal length of the converging lens
A roller coaster car travels down a hill and is moving at 18 m/s as it passes through a section of straight, horizontal track. what is the speed of the car at the top
Find the normalization constant co and the probability of finding the particle in the interval ±a//5. What is the mean momentum?
Two sources produce electromagnetic waves. What is the energy of a photon from source B
A nearsighted patient's far point is 0.723 m from her eyes. What is the distance between her eyes and the glasses
A nearsighted person wears glasses to correct the problem. How far in cm from the eyes is the person's far point located
Ideal incompressible water flows through a horizontal pipe of cross-sectional area 10.0 cm^2 at a pressure of 0.250 atm with a volume flow rate of 1.00 x 10^-3 m^3/s. What is the pressure at the val
A very long, thin straight line of charge has a constant charge density of 20pC/cm. How far does the electron go before it comes back
A particle's acceleration is described by the function ax =(10-t)m/s^2, where t is in s. At what time is the velocity again zero
A particle's velocity is described by the function vx= t^2? 9t+4m/s, where t is in s. How many turning points does the particle reach
In molecular hydrogen, H2, two hydrogen atoms are bonded covalently by sharing two electrons. Determine the electric force acting on each proton
In a section of horizontal pipe with a diameter of 3.0 cm, the pressure is 100 kPa and water is flowing with a speed of 1.5 m/s. What is the pressure in the narrower region
When 165 V is applied across a wire that is 14 m long and has a 0.31 mm radius, Find the resistivity of the wire
A small but measurable current of 8.4 x 10-10 A exists in a copper wire whose diameter is 2.9 mm. calculate the current density and electron drift speed
A bottle has a mass of 31.00g when empty and 97.94g when filled with water. what is the specific gravity of the other fluid
A 1.50 ? 103-kg car starts from rest and accelerates uniformly to 16.5 m/s in 12.4 s. Find the average power developed by the engine
Suppose the end of your finger is charged, Estimate the breakdown voltage in the air for your finger
A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 24 degrees below horizontal. Find the length of time the car is in the air
A beam of hydrogen molecules (H2) is directed toward a wall, at an angle of 50° with the normal to the wall. What is the beam's pressure on the wall
a car of 1200 kg travels east (call it +x) at 24 m/s while a truck of 2200kg travels north (call it +y) at 19 m/s . they collide and stick together. What is the momentum in the sysem
A 290-kg chandelier is suspended from vertical steel cable. The cable is 7.9m long. How much does the cable elongate
A ball rolling down an incline travels 6 cm in the first .25 seconds, and 24 cm in the first .50 seconds. find the average speed for the second quarter second time interval