Answer:
0.91 g/cm³
Explanation:
Density: This can be defined as the ratio of mass of an object to its volume.
The mathematical expression for density is given as,
D = m/v .............................. Equation 1
Where D = Density of the ice cube, m = mass of the ice cube, v = volume of the ice cube.
v = l³
Where l = length of each side of the cube.
l = 1.38 in = (1.38×2.54) cm = 3.51 cm
v = 3.51³
v = 43.24 cm³
Given: m = 1.39 oz = (1.39×28.35) g = 39.41 g
Substitute into equation 1
D = 39.41/43.24
D = 0.91 g/cm³
Hence the density of the ice cube = 0.91 g/cm³
Answer:
AQUAPORINS dramatically increases the rate of diffusion of water across cell membranes.
Explanation:
Aquaporins are integral membrane proteins also called water channels that forms pores in the membrane mainly for facilitating diffusion of water molecules in and out of the cell. Aquaporins selectively allow the passage of water molecules while preventing the passage of ions and other solutes through it as they are impermeable to protons, and large solutes. These proteins therefore increases the permeability of the membrane to water molecules and the rate of diffusion of water increases through them. Flow of water molecules in aquaporins follows the direction of osmotic pressure across the membrane. Aquaporins in some organisms have been modified to voltage gated aquaporins which helps them to close the water channels in unfavorable conditions such as drought and flooding. This is to prevent excessive loss of water to the surrounding or intake of water into the cells.
Answer:
Heldi is right
Explanation:
It will not move even if more people or one person gets off it will stay the same til a force pushes down on it.
K = ∆F / ∆s = 4N / 0.08m = 50N/m
