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Acar moves uphill at 40 km/h and then back downhill at 60 km/h. what is the average speed for the round trip?
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If frequency goes up, what happens to wavelength? does it get shorter or longer?
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69. air frictionthe velocity of the satellitea. decreases b. increases c. sometimes increases sometimedecreases d. no effect at all70. the unit of gravitational potential energy isa.jouté b.watt c. newtond.pascal71. which of the following is not influenced by a magneta. cobalt b.copper c.irond. nickel72. one joule of work done in one second by unit positive chargea.1 watt b.1 volt c.1 js d. none73. the most deviated colour of light after passing through a prisea. violet b.red c. green d.yellow4. a coin is placed below a beaker fill with water upto 12 cm isdisplaced by water isa. 9cm b.6cmс.3cmd.7cm
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Acar moves uphill at 40 km/h and then back downhill at 60 km/h. what is the average speed for the ro...
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