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elena-14-01-66 [18.8K]
4 years ago
11

The cardiovascular system works closely with the __ system, which takes oxygen out of the air and makes it available for our cel

ls to use.
A. Endocrine
B. Excretory
C. Digestive
D. Respiratory
Physics
1 answer:
V125BC [204]4 years ago
6 0
The correct Answer is D), Respitory :)
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How far will an arrow travel if it shot horizontally at 85.3m/s and it is 1.5m above the ground ?
dangina [55]

Answer:

Explanation:

A Pythagorean triple consists of three positive integers a, b, and c, such that a2 + b2 = c2. ... The name is derived from the Pythagorean theorem, stating that every right triangle has side lengths satisfying the formula a2 + b2 = c2; thus, Pythagorean triples describe the three integer side lengths of a right triangle.

8 0
4 years ago
The motion of an electron is given by x(t)=pt3+qt2+r, with p = -2.3 m/s^3 ,q = +1.5 m/s^2 , and r = +9.0 m.A) Determine its velo
alexandr402 [8]

Answer:

v(0)=0\\v(1)=-3.9\ m/s\\v(2)=-21.6\ m/s\\v(3)=-53.1\ m/s

Explanation:

<u>Instant Velocity </u>

Given the position as a function of time x(t), the instant velocity is the derivative of the function:

v(t)=x'(t)

We are given the position as

x(t)=-2.3t^3+1.5t^2+9

The derivative of x is

v(t)=x'(t)=-6.9t^2+3.0t

A) Let's compute v(0)

v(0)=-6.9(0)^2+3.0(0)=0

B)  

v(1)=-6.9(1)^2+3.0(1)

v(1)=-3.9\ m/s

C)

v(2)=-6.9(2)^2+3.0(2)

v(2)=-21.6\ m/s

D)

v(3)=-6.9(3)^2+3.0(3)

v(3)=-53.1\ m/s

4 0
3 years ago
A Scooter with a mass of 50 kilograms travels with a speed of 10 meters per second. A 2 Nt force bring it to a halt. How long ti
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Answer:

250s

Explanation:

Given parameters:

Mass  = 50kg

Speed  = 10m/s

Force  = 2N

Unknown:

Time the force was acting  = ?

Solution:

To solve this problem, we use the equation of motion from the second law of Newton:

            Ft  = mV

F is the force

t is the time taken

m is the mass

V is the velocity

          2  x t  = 50 x 10

               t  = 250s

3 0
3 years ago
Why don't the two forces in Newton's third law cancel each other? They act in the same direction. They are different kinds of fo
pogonyaev

Answer:They act on different bodies

Explanation:

Newton's third law of motion states that for every action there is equal and opposite reaction i.e. action and reaction. Though action and reaction are equal they act in different bodies that is why they do not cancel out each other.

For example, a block of mass m placed over the table exerts a force of mg to the table while the table applies a Normal reaction of equal magnitude as of mg to the block of mass m.

5 0
3 years ago
Which statement regarding the “Evaporation” lab is most accurate?
Sladkaya [172]
Substances evaporate at different rates
4 0
4 years ago
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