3 to the one too forty 5 76767
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.
(A) The impeller blades are worn or slipping on the shaft
Answer:
λ = 4.1638 10⁻⁷ m
Explanation:
The photoelectric effect was explained by Einstein assuming that the radiation acts like particles and the equation that describes the process is
K = h f -Ф
where K is the kinetic energy of the emitted electrons, hf the energy of the photons according to Planck's equation and Ф the work function of the material
In this case they give us the kinetic energy of the electrons
K = 0.7 eV
The sodium work function is tabulated Ф = 2.28 eV
Let's find the frequency of the photons
f = (K + Ф) / h
Planck's constant is
h = 6.626 10⁻³⁴ J s (1 eV / 1.6 10⁻¹⁹ J) = 4.136 10⁻¹⁵ eV s
f = (0.7 + 2.28) / 4.136 10⁻¹⁵
f = 7.2050 10¹⁴ Hz
let's find the wavelength using the relationship between speed and frequency and wavelength
c = λ f
λ = c / f
λ = 3 10⁸ / 7.205 10¹⁴
λ = 4.1638 10⁻⁷ m
Answer:
Water leaves the sprinkler at a speed of 2.322 m/sec
Explanation:
We have given internal diameter of the garden ![d_1=1.1cm](https://tex.z-dn.net/?f=d_1%3D1.1cm)
Speed of water in the hose is ![v_1=0.95m/sec](https://tex.z-dn.net/?f=v_1%3D0.95m%2Fsec)
Number of holes n = 22
Diameter of each holes ![d_2=15cm](https://tex.z-dn.net/?f=d_2%3D15cm)
According to continuity equation ![A_1v_1=A_2v_2](https://tex.z-dn.net/?f=A_1v_1%3DA_2v_2)
![d_1^2\times v_1=22\times d_2^2v_2](https://tex.z-dn.net/?f=d_1%5E2%5Ctimes%20v_1%3D22%5Ctimes%20d_2%5E2v_2)
![1.1^2\times 0.95=22\times 0.15^2\times v_2](https://tex.z-dn.net/?f=1.1%5E2%5Ctimes%200.95%3D22%5Ctimes%200.15%5E2%5Ctimes%20v_2)
![v_2=2.322m/sec](https://tex.z-dn.net/?f=v_2%3D2.322m%2Fsec)
So water leaves the sprinkler at a speed of 2.322 m/sec