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3 years ago

Why is no energy required in passive transport?

1 answer:

8 0

No energy is needed because the substances are moving from an area where they have a higher concentration to an area where they have a lower concentration.

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One property that electromagnetic waves differ from other types of waves is that they can

almond37 [142]

B.) travel in a vacuum

6 0

3 years ago

In a Hydrogen molecule there are a total of four charges, 2 protons in the two nuclei, and 2 electrons. How many unique charge-p

lutik1710 [3]

Answer:

The total number of charge pair without double counting is 6.

Explanation:

Given that,

Number of proton = 2

Number of electron = 2

We need to calculate the total number of charges in Hydrogen atom

Using formula for number of charges

$n= p+n$

$n =2+2$

$n=4$

Number of charge in pair is

$r = 2$

We need to calculate the total number of possible combination of pairs without double counting

Using formula of combination

$N=_{n}C^{r}$

Where, n = number of charges

r = number of charges per pair

Put the value into the formula

$N=_{4}C^{2}$

$N=\dfrac{4\times3\times 2}{2(4-2)}$

$N=\dfrac{4\times3\times 2}{2\times2}$

$N=6$

Hence, The total number of charge pair without double counting is 6.

5 0

3 years ago

In a coal-burning power plant, a condenser is used to cool down the steam and convert it back to liquid water true or false

balandron [24]

False because they let it in to the atmosphere and then its condenced

7 0

4 years ago

Read 2 more answers

You need to design a banked curve at the new circular Super 100 Raceway. The radius of the track is 800 m and cars typically tra

uysha [10]

Answer:

$33.1^{\circ}$

Explanation:

Let's start by writing the equations of the forces along the two directions:

- Vertical:

$N cos \theta = mg$

where

N is the normal reaction

$\theta$ is the angle between the road and the horizontal

(mg) is the weight of the car, with m being its mass and g the acceleration of gravity

- Horizontal:

$N sin\theta = m \frac{v^2}{r}$

where

v is the speed of the car

r is the radius of the turn

Dividing the 2nd equation by the 1st one, we get:

$tan \theta = \frac{v^2}{rg}$

In this problem:

$r = 800 m$ (radius of the turn)

$v=160 mi/h = 71.5 m/s$ is the speed

$g=9.8 m/s^2$

Substituting, we find:

$\theta= tan^{-1} (\frac{v^2}{rg})=tan^{-1}(\frac{(71.5)^2}{(800)(9.8)})=33.1^{\circ}$

8 0

4 years ago

Jack and Jill are on two different floors of their high rise office building and looking out of their respective windows. Jack s

Maru [420]

Answer:

a) speed when Jack sees the pot : 12.92 meters per second

b) height difference 163.115 meters

Explanation:

First to calculate te initial speed we use the acceleration formula:

a= v1-v0/t

Acceleration being gravity's acceleration (9.8 m/s^2)

v1 being the speed when Jill sees the pot

v0 when Jack sees it

and t the time between

Solving for v0 it would be

v1 - a*t = v0

replacing

$58 m/s - 9.8 m/s^2 *4.6 s = v0 = 12.92 m/s$

For the second question we use the position formula setting y0 and t0 as the position and time when jack sees the pot. (and setting the positive axis downward I.E. one meter below jack would be 1m not -1m)

The formula is

$y0 + v0*t + 1/2 g *t^2 = yt$

replacing

$0m + 12.92m/s* 4.6 s + 1/2 * 9.8 m/s^2 * (4.6 s)^2 = 163.115 m$

5 0

3 years ago