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steposvetlana [31]
3 years ago
9

The atoms have changed over time. Scientists think this is wrong. Why?

Physics
1 answer:
olga55 [171]3 years ago
6 0

Answer:

The mitochondria is the powerhouse of the cell, that's why.

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A force of 1.50 N acts on a 0.20kg trolley so as to accelerate it along an air track
Veseljchak [2.6K]

Answer:

2.12m/s

Explanation:

Given parameters:

Force on trolley  = 1.5N

Mass of trolley  = 0.2kg

Unknown:

Velocity of the trolley  = ?

Solution:

To solve this problem, we first find the acceleration of the trolley;

          Force  = mass x acceleration

         Acceleration  = \frac{Force }{mass}

Insert the parameters and solve;

          Acceleration  = \frac{1.5}{0.2}   = 7.5m/s²

Now to find the acceleration;

  Initial velocity  = 0m/s

  v² = u² + 2aS

v is the final velocity

u is the initial velocity

a is the acceleration

S is the distance

  Distance  = 30cm and this is 0.3m

     v² = 0² + 2(7.5)0.3  = 4.5

     v = √4.5 = 2.12m/s

8 0
3 years ago
In what cardio-vascular sports do you consider the importance of motion? Why?​
maria [59]
Cardiovascular (aerobic) exercise: increases your energy and stamina • helps control blood pressure • improves your blood lipid profile (cholesterol) • helps you burn extra calories to maintain an ideal weight.
3 0
3 years ago
PLEASE HELP WITH EXPLANATION! I WILL GIVE YOU BRAINLIEST!
DiKsa [7]

Answer:

divide the distance by the time and get average velocity in units of s. the detection to the left

6 0
3 years ago
After the car with the dead battery is running, the cables can be disconnected in the reverse order that they were connected. wh
azamat
Hi, thank you for posting your question here at Brainly.

Electricity is the flow of electrons due to a potential difference called voltage. The electrons naturally flows from a higher to a lower potential. Thus, the electrons flows from the positive to the negative terminal.
4 0
4 years ago
A 0.05-m3 rigid tank initially contains refrigerant-134a at 0.8 MPa and 100 percent quality. The tank is connected by a valve to
lesya692 [45]

Answer:

A= 203 KJ

B= 54 Kg

Explanation:

The initial specific volumes and internal energies are obtained from A-12 for a given pressure and state. The enthalpy of the refrigerant in the supply line is determined using the saturated liquid approximation for the given temperature with data from A-11. The mass that has entered the tank is:

Δm = m₂ – m₁

= V(1/α₂ – 1/α₁)

= 0.05 (1/0.0008935 – 1/ 0.025645)Kg

= 54Kg

The heat transfer is obtained from the energy balance:

ΔU= m_i_n h_i_n+  Q_n_e_t

m₂u₂ – m₁u₂ = m_i_nh_i_n + Q_n_e_t

Q_n_e_t= m₂u₂ – m₁u₁ – m_i_n

= V/α₂u₂ - V/α₁u₁ – m_i_n

=(0.05/0.0008935 . 116.72 – 0.05/0.025645 . 246.82 – 54.108.28) Kj

= 203 KJ

8 0
3 years ago
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