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VARVARA [1.3K]
3 years ago
10

Simplify the expression [9+2(2-4)]/3

Physics
1 answer:
il63 [147K]3 years ago
4 0

Answer:

5/3

Explanation:

[9+2(2-4)]/3

BODMAS

[9+2(-2)]/3

[9-4]/3

5/3

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Which system works with the respiratory system for the exchange of gases to take place?
zvonat [6]

Answer:

Circulatory System

Explanation:

The respiratory system works with the circulatory system to provide tis oxygen and to remove the waste products of metabolism. It also helps to regulate PH of the blood. Respiration is the sequence of events that result in the exchange of oxygen and carbon dioxide between the atmosphere and the body cells.

7 0
2 years ago
A net force of 6.8 N accelerates a 31 kg scooter across a level parking lot. What is the magnitude of the scooter’s acceleration
mrs_skeptik [129]

Answer:

a)0.22 m/s².

Explanation:

Given that

Net force ,F= 6.8 N

mass ,m = 31 kg

From the second law of Newton's

F = m a   ---------------1

Where

F=Net force ,m=mass

a=Acceleration

Now by putting the values in the equation 1

F = m a

6.8 = 31 x a

a=\dfrac{6.8}{31}\ m/s^2

a = 0.219\ m/s^2

a = 0.22\ m/s^2

Therefore the acceleration of the scooter will be 0.22 m/s².

The answer will be "a".

a)0.22 m/s².

3 0
3 years ago
What type of device is a coal-fired power plant?
coldgirl [10]

Answer:

A boiler is a type of coal fired power plant.

Explanation:

4 0
3 years ago
All the different habitats in our world make up
nikdorinn [45]

Answer:

All the different habitats in our world make up biodiversity

Explanation:

Biodiversity is the sum of different species in life. With different species, it's diverse because it's more than one type.

Hope this helped!

4 0
3 years ago
Read 2 more answers
Can someone help me?!!!!!
kramer

Answer:

Parabola

Explanation:

The motion of a projectile consists of two independent motions:

- A uniform motion along the horizontal (x) direction, with constant velocity v_x. In fact, there are no forces acting along this direction (if we neglect air resistance), so the acceleration is zero and the velocity is constant

- An uniformly accelerated motion along the vertical (y) direction, with constant acceleration g=9.8 m/s^2 downward (acceleration due to gravity). This acceleration is due to the force of gravity that pulls the projectile downward.

The composition of these two motions gives a parabolic trajectory. In fact, the equations of the motion along the two directions are:

x(t) = v_x t (1)

y(t) = h + v_y t - \frac{1}{2}gt^2 (2)

Solving for t in eq.(1),

t=\frac{x}{v_x}

and substituting into (2)

y(t) = h + \frac{v_y}{v_x}x - \frac{1}{2}g(\frac{x}{v_x})^2

which is the equation of a parabola.

5 0
3 years ago
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