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4 years ago

What color is absorbed when we see a yellow flower?

Physics

1 answer:

svlad2 [7]4 years ago

6 0

Pretty much all other colors except yellow are absorbed.

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Which situation shows kinetic energy being transformed into potential energy?

hodyreva [135]

Answer:

I think the answer is "A roller coaster going up a hill"

Explanation:

Because the roller coaster is losing kinetic and losing potential enregy.

7 0

4 years ago

A mixture of N2, H2 and He have mole fractions of 0.25, 0.65, and 0.10, respectively. What is the partial pressure of N2 if the

matrenka [14]

Answer: The partial pressure of $N_2$ if the total pressure of the mixture is 3.9 atm is 0.975 atm

Explanation:

According to Raoult's law, the vapor pressure of a component at a given temperature is equal to the mole fraction of that component multiplied by the vapor pressure of that component in the pure state.

$p_A=x_A\times P_T$

where, x = mole fraction of nitrogen in solution = 0.25

$p_A$ = partial pressure of nitrogen = ?

$P_T$ = Total pressure = 3.9 atm

Putting in the values :

$p_A=0.25\times 3.9=0.975atm$

The partial pressure of $N_2$ is 0.975 atm

3 0

4 years ago

Read 2 more answers

When an ideal gas does positive work in its surroundings, which of the ga's quantities increases?

Burka [1]

I think it's B hope it helps

4 0

3 years ago

A boat with a mass of 1000 kg drifts with the current down a straight section of river parallel to the +x+x axis with a speed of

IrinaK [193]

Answer:

Explanation:

Our values are defined by,

$m=1000kg\\v = 2m/s\\a = 2.7 \angle 45\°$

We can express also in a vectorial way, then

$v=2\hat{i} \rightarrow$ no values in $\hat{j}$

Acceleration as follow,

$a= 2.7cos45 \hat{i} + 2.7 sin45 \hat{j}$

We know that velocity is given by,

$V(t) = v_0+at \rightarrow v_0 = 2$

We need to calculate for t=3, then

$v(3) = 2\hat{i} +(2.7cos45 \hat{i} + 2.7 sin45 \hat{j})*3$

$v(3) = (2\hat{i}+3*2.7cos45 \hat{i})+(3*2.7 sin45 \hat{j})$

$v(3) = (2+3*2.7cos45)\hat{i}+(5.7 sin45 )\hat{j}$

$v(3) = 7.7\hat{i}+5.7\hat{j}$

Our mass is 1000Kg, so the momentum is

$P = mv$

$P= 1000(7.7\hat{i}+5.7\hat{j})$

$P=7700\hat{i}+5700\hat{j}$

7 0

4 years ago

Describe and apply Newton’s Three Laws

Maurinko [17]

Newton's First Law of Motion: I. Every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it. This we recognize as essentially Galileo's concept of inertia, and this is often termed simply the "Law of Inertia".

5 0

3 years ago