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3 years ago

Which body system is responsible for bringing oxygen into the body?

Physics

2 answers:

____ [38]3 years ago

3 0

The respiratory system

Semenov [28]3 years ago

3 0

I believe it is respiratory.
Digestive deals with food.
Circulatory deals with blood.
The musculoskeletal deals with body form and such.

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What is the electric field strength between two parallel plates 5cm apart with a potential difference of 25V across them?

Butoxors [25]

Use the following formula for the electric field strength between two parallel plates:

E = V/d

where,

V: potential difference = 25V

d: distance between plates = 5 cm = 0.05 m

Replace the previous values of the parameters into the formula for E:

$E=\frac{25V}{0.05m}=500\frac{V}{m}$

Hence, the electric field strength is 500V/m

5 0

2 years ago

A ball is projected vertically upward from the surface of the Earth with an initial speed of +49 meters per second. The ball rea

fenix001 [56]

Answer: 245 meters

Explanation: 49 ? Meters
over over over
1 5 seconds

Cross multiply- 49 times 5 divided by 1 which equals 245

8 0

3 years ago

Oil has a density ρ of 860kg/m3. an oil droplet is suspended between two plates 1.0cm apart by adjusting the potential differenc

schepotkina [342]

After reaching the terminal velocity the speed of the oil drop is given as

$v = \frac{d}{t}$

it drop by 3 mm in 7.33 s

$v = \frac{0.003}{7.33}$

$v = 4.1 * 10^-4 m/s$

now by the formula of terminal speed

$6\pi \eta r v = \rho* \frac{4}{3}\pi r^3g$

$v = \frac{2}{9/eta}r^2\rho g$

$4.1*10^{-4} = \frac{2}{9*1.83 * 10^{-5}}*r^2*860*9.8$

$r = 0.16 mm$

so the radius of drop is 0.16 mm

Now the electric field between the plates is given as

$E = \frac{\Delta V}{\Delta x}$

$E = \frac{1177}{0.01} = 1.177* 10^5 N/C$

now we will use the condition of equilibrium

$qE = mg$

$q*1.177 * 10^5 = \rho* \frac{4}{3}\pi r^3 *9.8$

$q*1.177 * 10^5 = 860* \frac{4}{3}\pi *(0.16*10^{-3})^3*9.8$

$q = 1.2 * 10^{-12} C$

so above is the charge on the drop

7 0

4 years ago

The smallest scale of the following is

Llana [10]

Answer:

B) 1:100

Explanation:

this explanation is actually simple.

you can see this problem as a simple comparation if you move for example

1:10

if you move 1 cm you are going to move 10cm in the other side usually is used for planes in architecture or sizing issues, so, if the scale need to be grater, that is if is necessary to increase the number inthe right side in this case 10 cm to 100cm it is because in 100 the resolution is better.

you can see this problem as a fraction

1/10 or 1/1000

4 0

4 years ago

What force must be provided to accelerate a 64-lb object upward at a rate of 2 ft/s2? (Use g = 32 ft/s2.)

vovikov84 [41]

Answer:

The force that must be provided to accelerate the object = 302.196 N

Explanation:

Force: Force can be defined as the product of mass and acceleration. The S.I unit of force is Newton (N).

Ft - W = ma............ Equation 1

Ft = W + ma .......... Equation 2

Where Ft = force provided, W = weight of the object, m= mass of the object, a = acceleration of the object.

Given: mass = 64 lb, g = 32 ft/s² a = 2 ft/s²

Conversion: (i) from 64 pounds to Kg = 64/2.2046

= 29.03 kg

(ii) from 2 ft/s² to m/s² = 0.3048 × 2 = 0.6098 m/s²

(iii) from 32 ft/s² to m/s² = 0.3048×32 = 9.8 m/s².

and W = mg = 29.03 × 9.8 = 284.494 N,

Substituting these values into equation 2,

Ft = 284.494 + 29.03×0.6098

Ft = 284.494 + 17.7

Ft = 302.196 N

Therefore, the force that must be provided to accelerate the object = 302.196 N

8 0

4 years ago