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Alex
4 years ago
11

To prevent contamination laundered linens should be kept

Physics
1 answer:
Allushta [10]4 years ago
7 0

Answer:

A.

Explanation:

By keeping the linens in the closet, you'll keep them from becoming soiled or dirty.

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An electron is projected with horizontal speed 105m / s in a downwardly directed 304N / C electric field. Find the vertical posi
Vinil7 [7]

Answer:

-107 m

Explanation:

Sum of forces in the y direction:

∑F = ma

-qE = ma

a = -qE/m

a = -(1.60×10⁻¹⁹ C) (304 N/C) / (9.11×10⁻³¹ kg)

a = -53.4×10¹² m/s²

Given in the y direction:

v₀ = 0 m/s

a = -53.4×10¹² m/s²

t = 2×10⁻⁶ s

Find: Δy

Δy = v₀ t + ½ at²

Δy = (0 m/s) (2×10⁻⁶ s) + ½ (-53.4×10¹² m/s²) (2×10⁻⁶ s)²

Δy = -107 m

4 0
3 years ago
Photosynthesis transforms molecules of water and carbon dioxide into Molecules of?
brilliants [131]
Into molecules of sugar and oxygen.
The complete reaction of the photosynthesis is in fact:
6CO_2+6H_2O \rightarrow C_6H_{12}O_6+6O_2
and the energy of the light coming from the sun is also used to make the reaction possible.
7 0
4 years ago
How to solve part (b)?​
maria [59]

Answer:

<em>1.11m</em>

Explanation:

From the diagram we are given the following forces;

F1 = 24.3N

F3 = 30N

Since the sum of upward forces is equal to that of downward force, then;

F2 = F1 + F3

F2 = 24.3N + 30N

F2 = 54.3N

Required

Distance between B and C

First we need to get Length of AC

Take moment about A

Anticlockwise moment = F3 cos20 * AC

Anticlockwise moment = 30ACcos 20

Clockwise moment = 1.2 * F2

Clockwise moment = 1.2(54.3) = 65.16Nm

Applying the principle of moment;

Sum of ACW moment = Sum of CW moments

30ACcos 20 = 65.16

AC = 65.16/30cos20

AC = 65.16/28.19

AC = 2.31m

Get the distance BC

AC = AB + BC

BC = AC-AB

BC = 2.31 - 1.2

BC = 1.11m

Hence the separation between B and C is 1.11m

<em>Note that the force F1 got in (a) was the value used in the calculation.</em>

<em></em>

8 0
3 years ago
The best leaper in the animal kingdom is the puma, which can jump to a height of 3.7m when leaving the ground at an angle of 45
zheka24 [161]

Answer:

v = 12 m/s

Long, boring, and convoluted explanation:

First, let's lay out our information.

- <em>max height = 3.7 m</em>

- <em>0 = 45°</em>

<em>- gravitational acceleration constant = 9.8 </em>\frac{m}{s^2}<em />

<em />

Since the puma leaves the ground at a <em> 45 °</em> angle, its motion will follow a curved path as seen in many projectile motion problems, where the object is being influenced solely by the force of gravity. And because the puma leaves the ground at an angle, its initial velocity is broken down into its horizontal and vertical components. We were also told, though indirectly, that the max height is  <em>3.7m</em>  because the puma can reach up to that height. Gravity is always given to be <em>9.8 </em>\frac{m}{s^2}<em />

<em />

Because we are dealing with maximum height and gravity, we have to use the vertical component of the velocity,  <em>vsin ( θ )</em> , and not the horizontal component, <em>vcos ( θ )</em> .

Given its max height, the acceleration due to gravity, and the angle, we can now solve for the speed at which the puma leaves the ground using the following equation: <em>vsin ( θ )  = </em> \sqrt{2hg}

Where <em> vsin ( θ )</em>  is the vertical component of the initial velocity and <em>h</em>  and <em>g</em> are max height and gravitational acceleration constant respectively.

Plugin, rearrange and solve

v sin ( θ )  =  \sqrt{2hg}

v sin ( 45 ∘ )  =   √ 2  ×  3.7  ×  9.8

v ( 0.71 )  =  \sqrt{72.52}

v ( 0.71 )  =  8.52

v  =  8.52 /0.71

v =  12 m s

<em />

<em />

4 0
3 years ago
When does sound become damaging to Human hearing?
wel

Answer:

D) 250 decibels

Explanation:

4 0
3 years ago
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