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You are driving home from school steadily at 95 km/h for 130 km. Itthen beins to rain and you slow to 65 km/h. You arrive home after driving 3 hours and 20 minutes.
(a) how far is your hometown from school?
(b) What was your average speed?
A sound wave has a frequency of 677 Hz in air and a wavelength of 0.50 m. What is the temperature of the air
A paddle wheel frictionally adds thermal energy to an ideal monatomic gas in a sealed, insulated container. The paddle wheel is driven by a cord connected to a falling object as shown in the drawing. In this experiment, a 5.0-kg object falls throu..
q1. an important news announcement is trans- mitted by radio waves to people who are 122 km away sitting next to their
The amount of carbon- 14 in an ancientwooden bowl is found to be one-half that in a new piece ofwood. How old is the bowl
A person travels by car from one city to another with different constant speeds between pairs of cities. She drives for40.0 min at 50.0 km/h, 7.0 min at70.0 km/h and 35.0 min at 30.0km/h, and spends 35.0 min eating lunchand buying gas.
A man drags a 74.0-kg crate across the floor at a constant velocity by pulling on a strap attached to the bottom of the crate. Find the magnitude of the tension in the strap
Compare the speed of sound following from that slope to the calculated speed of sound from the gas properties
A container is filled to a depth of 19.0 cm with water. On top of the water floats a 32.0-cm-thick layer of oil with specific gravity0.600
A 270-N sphere 0.20 m in radius rolls without slipping 6.0 m down a ramp that is inclined at 40° with the horizontal. What is the angular speed of the sphere at the bottom of the slope
A juggler performs in a room whose ceiling is 3.0 m above thelevel of his hands. He throws a ball upward so that it just reachesthe ceiling. What is the time required for the ball to reach the ceiling
A copper wire of radius a = 0.235 mm has an aluminum jacket of outer radius b = 0.302 mm. There is a current i = 1.56 A in the composite wire. Take the resistivity for copper and aluminum to be 1.69 x 10-8?·m and 2.75 x 10-8?·m. Calculate the current..
An excellent laboratory vacuum has a pressure of 5.00 multiply.gif 10-18 atm, ow many gas molecules are there per cubic centimeter in such a vacuum at 290 K
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