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3 years ago

12

Why don’t plants need a digestive system? A. They do not need nutrients to grow and develop. B. They use energy from the sun to

make their own food. C. They create oxygen, which they use as food. D. They absorb water and food through their roots.

2 answers:

Sedbober [7]3 years ago

7 0

D .they obsorb water and food through their roots

Studentka2010 [4]3 years ago

6 0

The answer is definitly B

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Ganezh [65]

As per impulse momentum theorem we know that

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now here we will have

$F = 6.50 \times 10^3 N$

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now we need to find final speed using above formula

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$v_f = 15.7 m/s$

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4 years ago

What is the element with the lowest electronegativity value?

Lerok [7]

<h2>Answer: Francium </h2>

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3 years ago

A 2190 kg car moving east at 10.5 m/s collides with a 3220 kg car moving east. The cars stick together and move east as a unit a

Bezzdna [24]

To solve this problem it is necessary to apply the concepts related to the conservation of the Momentum describing the inelastic collision of two bodies. By definition the collision between the two bodies is given as:

$m_1v_1+m_2v_2 = (m_1+m_2)V_f$

Where,

$m_{1,2}$ = Mass of each object

$v_{1,2}$ = Initial Velocity of Each object

$V_f$ = Final Velocity

Our values are given as

$m_1 = 2190Kg$

$v_1 =10.5m/s$

$m_2 = 3220kg$

$V_f = 4.74m/s$

Replacing we have that

$m_1v_1+m_2v_2 = (m_1+m_2)V_f$

$(2190)(10.5)+(3220)v_2 = (2190+3220)(4.74)$

$v_2 = 0.8224m/s$

Therefore the the velocity of the 3220 kg car before the collision was 0.8224m/s

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3 years ago

Why do scientist use different types of models to represent compounds

nexus9112 [7]

Because they are different they all show different traits.

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