Physics, 27.07.2019 09:00 aleort8319
If the earth and distant stars were stationary (motionless) in space, what would we observe about the wavelength from these stars? a. wavelengths measured would match the actual wavelengths emitted. b. wavelengths measured would be shorter than the actual wavelengths emitted. c. wavelengths measured would be longer than the actual wavelengths emitted. if a star is moving toward us in space, what would we observe about the wavelength from these stars? a. wavelengths measured would be shorter than the actual wavelengths emitted. b. wavelengths measured would match the actual wavelengths emitted. c. wavelengths measured would be longer than the actual wavelengths emitted.
Answers: 1
Physics, 22.06.2019 06:30
Alead ball is dropped into a lake from a diving board 5m above the water . it hits the water with a certain velocity and then sink with constant velocity in bottom . it reaches the bottom 5 second after it is dropped if g= 10m/s2 . find depth of the lake and average velocity of the ball ?
Answers: 1
Physics, 22.06.2019 16:00
Suppose a soccer ball is kicked from the ground at an angle 20.0º above the horizontal at 8.00 m/s. the y-velocity is determined to be 2.74 m/s. how long will the ball be in the air? assume the ball lands at the same height at which it was kicked.
Answers: 2
Physics, 22.06.2019 19:50
The heater element of a 120 v toaster is a 5.4 m length of nichrome wire, whose diameter is 0.48 mm. the resistivity of nichrome at the operating temperature of the toaster is 1.3 × 10-6 ω·m. the toaster is operated at a voltage of 120 v. (a) what is the power drawn by the toaster? (b) if the cost of electricity is 12 ¢ per kilowatt-hour, and it takes 2 minutes to toast bread, how much does it cost for toasted bread? (c) when the heater element is at room temperature, is the resistivity in the nichrome wire greater than, less than, or equal to it’s resistivity when at operating temperature? explain.
Answers: 3
Physics, 22.06.2019 20:00
Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?
Answers: 3
If the earth and distant stars were stationary (motionless) in space, what would we observe about th...
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