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Rzqust [24]
3 years ago
11

Which structures protect the cell? Check all that apply.

Physics
2 answers:
MAXImum [283]3 years ago
8 0

Answer:

cell wall and cell membrane

zimovet [89]3 years ago
6 0

Answer:

Cell wall and Cell membrane.

Explanation:

The cell membrane controls what goes in and out of the cell

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Does the North Pole receive more daylight hours during Winter or Summer?
MrMuchimi

Answer:

Summer begins in the Northern Hemisphere on June 20 or 21 when the North Pole is tilted a full 23.5° toward the sun. On this day, the Northern Hemisphere has the most hours of daylight, while the Southern Hemisphere has the least hours of daylight.

Explanation:

3 0
3 years ago
Read 2 more answers
A 20 m high filled water tank develops a 0.50 cm hole in the vertical wall near the base. With what speed does the water shoot o
Rina8888 [55]

Answer:

The speed of the water shoot out of the hole is 20 m/s.

(d) is correct option.

Explanation:

Given that,

Height = 20 m

We need to calculate the velocity

Using formula Bernoulli equation

\dfrac{1}{2}\rho v_{1}^2+\rho gh_{1}=\dfrac{1}{2}\rho v_{2}^2+\rho gh_{2}

Where,

v₁= initial velocity

v₂=final velocity

h₁=total height

h₂=height of the hole from the base

Put the value into the formula

v_{1}^2=2g(h_{2}-h_{1})

v_{1}=\sqrt{2g(h_{2}-h_{1})}

v_{1}=\sqrt{2\times9.8\times(20-0.005)}

v_{1}=19.7\ m/s= approximate\ 20\ m/s

Hence, The speed of the water shoot out of the hole is 20 m/s.

7 0
3 years ago
Newton's third law says that for every action force there is a reaction force which is
olga nikolaevna [1]
A. Equal and opposite For every action, there is an equal and opposite reaction
4 0
3 years ago
Explain the reason for following in science. A small stone trapped in your shoe, under your foot, can be very painful.
igor_vitrenko [27]

Answer:

bvvfalbvenvea;vfahvfahvfna.fvn.adnvfad.nvfa;vnfavnfdavnfdanv.VHFvna.vnfad.vnfa;

Explanation:nvfad;bfvf  vf fvdnva,e vdfvf dfvfeva

6 0
2 years ago
the mass of one water drop is 0.0008kg and the gravitational field strength is 10N/kg what is its weight
djyliett [7]
Weight = (mass) x (gravity)

Weight = (8 x 10⁻⁴ kg) x (10 N/kg) = 0.008 Newton
8 0
3 years ago
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