How does logging affect waterways?

Answers

Answer 1

Answer: This problem applies specifically to deforestation. Since forests have a climate of their own, cutting vast areas of trees will have an impact on water patterns.

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What was helium used for in the past?

Answers

Helium used to be used in hot air balloons. Then, when the Hindenburg exploded, annexed file, they realized that hydrogen was not only lighter, but it also was less flammable.

Hot air balloons. They have a little hot plate/fire or whatever and they used, and that made the helium rise, thus rising the balloon.

What is the wavelength of a 147-g baseball traveling at 91.0 mph?

Answers

The formula to determine the wavelength is, De-Broglie wavelength formula:

$\lambda =(h)/(mv)$ -(1)

where, $\lambda$ is wavelength, m is mass, v is velocity and h is Planck's constant = $6.63* 10^(-34) Js$ = $6.63* 10^(-34) kgm^(2)s^(-1)$

mass, m = 147 g (given)

Since, 1 g = 0.001 kg

So, 147 g = 0.147 kg

v = 91.0 mph (given)

Converting mph to mps:

Since, $1 mph = (1.609* 10^(3) ms^(-1))/(60* 60)$

So, $90 mph = (91* 1.609* 10^(3) ms^(-1))/(60* 60)$ = $40.67 ms^(-1)$

Substituting the values in formula 1:

$\lambda =(6.63* 10^(-34) kgm^(2)s^(-1))/(0.147 kg* 40.67 ms^(-1))$

$\lambda =1.11* 10^(-34) m$

Hence, the wavelength wavelength of a 147-g baseball traveling at 91.0 mph is

$1.11* 10^(-34) m$ .

Answer: its D

Explanation:

a hydrogen-filled balloon was ignited and 1.60g of hydrogen reacted with 12.8g of oxygen. how many grams of water vapor were formed? (assume that water vapor is the only product.)could you help me with this one:) ?

Answers

2H2 + O2 ---> 2H2O

1 mole of H2 = 2g
1 mole of O2 = 32g
1 mole of H2O = 18g

according to the reaction:
2*2g H2---------------32g O2
1,6g H2----------------- x g O2
x = 12,8g O2

so reaction is stechiometric

32g O2---------------- 2*18g H2O
12,8g O2 -------------- x
x = 14,4g H2O

answer: 14,4g of water vapour

True or False?
A strong acid is safe as long as it's in a dilute solution

Answers

It should be true because a dilute solution is a mixture that has only a little solute dissolved in a certain amount of solvet.So true

true.(i think) if I'm wrong ask a friend who knows

1. What two quantities must be known to calculate the density of a sample of matter?A. color and mass
B. mass and volume
C. length and mass
D. solubility and mass

Answers

remember the formula for density:
$d = (m)/(v)$
where d is density, m is mass, and v is volume.

Therefore, B. mass and volume is needed to determine the density

mass andvolume is the answer

Which of these is most likely to become a carbon film?O a dinosaur leg bone
O a sea creature's shell
O a flowering plant
O a tree trunk

Answers

A flowering plant

A sea creatures shell

Answer:

C- FLOWERING PLANT

Explanation:

100% on edge

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