AYUDA PORFAVOR ES PARA UN TRABAJO PRACTICO
4) a) La densidad de la plata es de 10,5 g/cm3 . ¿Qué masa tiene en kg un trozo de 60 dm3? b) Calcular en m3 el volumen ocupado por 1250 kg de mármol. ( densidad del mármol: 2,7 g/cm3)
c) Calcular la masa de 2 dm3 de hierro. ( densidad del hierro: 7,8 g/cm3)
Answers: 1
Physics, 22.06.2019 16:30, xxaurorabluexx
An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. but she does have devices to measure distance and time accurately. she knows her own mass is 77.4 kg , but she is unsure of the mass of a large gas canister in the airless rocket. when this canister is approaching her at 3.50 m/s , she pushes against it, which slows it down to 1.30 m/s (but does not reverse it) and gives her a speed of 2.60 m/s . what is the mass of the canister?
Answers: 1
Physics, 22.06.2019 22:00, jerry7792
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
AYUDA PORFAVOR ES PARA UN TRABAJO PRACTICO
4) a) La densidad de la plata es de 10,5 g/cm3 . ¿Qué ma...
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