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belka [17]
3 years ago
10

explain why a circulatory system is important in meeting the needs of all cells throughout an animals body

Physics
1 answer:
Effectus [21]3 years ago
7 0
Helps ur blood circulate, to ur head and ect helpin u leave
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Consider a horizontal, uniform board of weight 125 N and length 4 m that is supported by vertical chains at each end. A person w
Norma-Jean [14]

Answer:

b. 375 N

Explanation:

System of forces in balance

ΣFy = 0 Equation (1)

Forces acting on the board

T₁: Tension in the  left chain ,  vertical and upward

T₂ = 250 N : Tension in the right chain ,  vertical and upward

W₁ = 125 N : Weight of the  board , vertical and downward

W₂ =  500 N : Weight of the  person , vertical and downward

Calculation of the T₁

We apply the Equation (1)

ΣFy = 0  

T₁+T₂-W₁-W₂ = 0

T₁ = -T₂+W₁+W₂

T₁ = -250 N+ 125 N+ 500 N

T₁ = 375 N

5 0
3 years ago
How are defenders on a baseball team positioned ?
Ulleksa [173]

Answer:

1 (pitcher), 2 (catcher), 3 (first baseman), 4 (second baseman), 5 (third baseman), 6 (shortstop), 7 (left fielder) 8 (center fielder), and 9 (right fielder)

Explanation:

There are nine fielding positions in baseball. Each position conventionally has an associated number, for use in scorekeeping by the official score

8 0
3 years ago
Read 2 more answers
A ball of mass m is thrown straight upward from ground level at speed v0. At the same instant, at a distance D above the ground,
Alla [95]

Answer:

Explanation:

Let the balls collide after time t .

distance covered by falling ball

s₁ = v₀ t + 1/2 g t²

distance covered by rising ball

s₂ = v₀ t - 1/2 g t²

Given ,

s₁ + s₂ = D

D = v₀ t + 1/2 g t² + v₀ t - 1/2 g t²

= 2v₀ t

t = D / 2v₀

s₂ = v₀ t - 1/2 g t²

= v₀ x D / 2v₀ - (1/2) x  g x D² / 4v₀²

= D / 2 - gD² / 8 v₀²

6 0
2 years ago
1. A student practicing for a track meet ran 263 m in 30 sec. What was her average speed?
faltersainse [42]

Answer: By 47

Explanation: subtract 310 and 263

6 0
3 years ago
The blackbody curved for a star named Beta is shown below. What is the surface temperature of the star rounded to the nearest wh
marshall27 [118]
<span>Then, since the peak wavelength of the star Beta is 200nm, use Wein law and round 200 to the nearest WHOLE NUMBER. Hope that helps. </span>
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3 years ago
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