Answers: 1
Physics, 21.06.2019 20:30
When you drop a pebble from height a it reaches the ground with speed v if there is no air resistance. from what height should you drop it so it will reach the ground with three times the speed? (a) 9m (b) 3m (c) 6m (d) 18m
Answers: 2
Physics, 22.06.2019 02:00
Aplane travels 1000 miles in 5 hours .what is the planes average speed?
Answers: 2
Physics, 22.06.2019 14:00
What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration
Answers: 1
Physics, 22.06.2019 22:00
1. what is the relationship between wavelength and the penetrating power of an electromagnetic wave? a) the penetrating power has no relationship to the wavelength. b) the penetrating power increases as the wavelength increases. c) the penetrating power decreases as the wavelength increases. d) the penetrating power decreases as the wavelength decreases. 2. as ice melts and turns into water, the speed of sound through the material would most likely do what? justify your answer. a) the speed would not change because the material is always water. b) the speed of sound would increase because the density of water is less than that of ice. c) the speed of sound would increase because energy is added to ice in order to make it melt. d) the speed of sound would decrease because sound travels faster through solids than liquids. 3.which of these waves need a medium to travel through? a) sound b) x-rays c) infrared rays d) visible light
Answers: 3
A cylindrical metal can is to have no lid. It is to have a volume of 125π in3. What height minimizes...
Mathematics, 18.02.2021 16:50
History, 18.02.2021 16:50
Biology, 18.02.2021 16:50
Mathematics, 18.02.2021 16:50
World Languages, 18.02.2021 16:50
Mathematics, 18.02.2021 16:50
Mathematics, 18.02.2021 16:50
History, 18.02.2021 17:00
Health, 18.02.2021 17:00
History, 18.02.2021 17:00