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3 years ago

Why food cook faster with salt water than cook with pure water

2 answers:

7 0

When salt is added, it makes it harder for the water molecules to escape from the pot and enter the gas phase, which happens when water boils

user100 [1]3 years ago

5 0

Answer:

oil heats faster

Explanation:

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What are 3 types of cells that helper T cells produce upon being an alarmed of an antigen? Thanks for your help!! :)

Svetllana [295]

Whenever these are an alarming due to a foreign antigen, the Helper T cells, Memory T cells, and Cytotoxic T cells are being produced. Helper T cells to recognize the specific foreign antigen that is entering the body, Memory T cells to remember the specific foreign antigen that is attacking, and Cytotoxic T cells that are for the destruction of the foreign cells and produce cytokines to attract macrophages

5 0

3 years ago

A luggage handler pulls a 20.0 kgkg suitcase up a ramp inclined at 32.0 ∘∘ above the horizontal by a force F⃗ F→ of magnitude 16

Nuetrik [128]

Answer:

a) W₁ = 8242.2 J, b) W₁ = 8242.2 J , c) W₃ = 0 , d) W₄ = -189.51 J ,

f) v = 27.24 m / s

Explanation:

a) Work is defined by

W = F. d = F d sin θ

where angle is between force and displacement

n this case the suitcase is going up and the outside F is parallel to the plane, so the angle is zero and the cosine is 1

W = F d

Let's calculate

W = 169 3.8

W₁ = 8242.2 J

b) the gravitational force is vertical so it has an angle with respect to the horizontal parallel to the plane of

θ’= 90 - θ

θ'= 90-32 = 58º

W = m g d thing θ ’

W = 20 9.8 3.8 thing (180 + tea ’) =

W = 744.8 cos (180 + 32)

W₂ = -631.6 J

c) The normal work, as it has 90º with respect to the displacement, its work is zero

W₃ = 0

d) the work of the friction force

Let's write Newton's second law the Y axis

N- Wy = 0

Cos 32 = Wy / W

N = W cos 32

The expression for friction force is

fr = μ N

fr = μ mg cos 32

fr = 0.300 20 9.8 cos (32)

fr = 49.87 N

The work of the friction force

W = fr d cos 180

W₄ = -49.87 3.8

W₄ = -189.51 J

E) The total work

W = W₁ + W₂ + W₃ + W₄

W = 8242.2- 631.6 + 0 -189.51

W_total = 7421.09 J

F) Usmeosel theorem of work and energy

W = ΔK

W = ΔK = ½ m v² - 0

v =√ 2W / m

v = √ (2 7421.09 / 20)

v = 27.24 m / s

5 0

4 years ago

A car accelerates in the +x direction from rest with a constant acceleration of a1 = 1.76 m/s2 for t1 = 20 s. At that point the

alex41 [277]

Answer:

(a) $v_1 = a_1t_1 = 1.76 t_1$

(b) It won't hit

Explanation:

(a) the car velocity is the initial velocity (at rest so 0) plus product of acceleration and time t1

$v_1 = v_0 + a_1t_1 = 0 +1.76t_1 = 1.76t_1$

(b) The velocity of the car before the driver begins braking is

$v_1 = 1.76*20 = 35.2m/s$

The driver brakes hard and come to rest for t2 = 5s. This means the deceleration of the driver during braking process is

$a_2 = \frac{\Delta v_2}{\Delta t_2} = \frac{v_2 - v_1}{t_2} = \frac{0 - 35.2}{5} = -7.04 m/s^2$

We can use the following equation of motion to calculate how far the car has travel since braking to stop

$s_2 = v_1t_2 + a_2t_2^2/2$

$s_2 = 35.2*5 - 7.04*5^2/2 = 88 m$

Also the distance from start to where the driver starts braking is

$s_1 = a_1t_1^2/2 = 1.76*20^2/2 = 352$

So the total distance from rest to stop is 352 + 88 = 440 m < 550 m so the car won't hit the limb

8 0

3 years ago

Convert 150,000mm to km

Gwar [14]

.15 km. It goes in this way from largest to least: Kilometers, Hectometers, decameters, meters, decimeters, centimeters, and finally millimeters. When you are going up in measures you move the decimal point one space to the left for each measure you pass. It is vice-versa for going down these measures plz mark brainliest.

5 0

4 years ago

Use differentials to estimate the amount of metal in a closed cylindrical can that is 10 cm high and 10 cm in diameter if the me

lana66690 [7]

Answer:

dV = 32.98 cm³

Explanation:

We know that

V = f ( h,r)

$dV= \frac{\partial V}{\partial r}dr+ \frac{\partial V}{\partial h}dh$

We also know that

$V=\pi r^2h$

$dV= 2\pi h dr + \pi r^2 dh$

Given that

h= 10 cm

d=10 cm , r= 5 cm

Thickness = 0.05 cm so dr = 0.05 cm

The metal in the top and the bottom is 0.2 cm thick so dh = 0.2 + 0.2 cm

dh = 0.4 cm

Now by putting the values

$dV= 2\pi h dr + \pi r^2 dh$

$dV= 2\times \pi \times 5\times 0.05 + \pi \times 5^2\times 0.4\ cm^3$

dV = 32.98 cm³

8 0

3 years ago

Why food cook faster with salt water than cook with pure water​

Why food cook faster with salt water than cook with pure water