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3 years ago

9

Who is Rachel Carson and why is she important to environmentalism

1 answer:

ryzh [129]3 years ago

5 0

Rachel Carson was an American marine biologist, who after the discovery of the effects of synthetic pesticides on the environment, became a conservationist.. She wrote a book called, <em>Silent Spring</em> which helped advance the worldwide environmental movement. Her book, <em>Silent Spring</em> expressed her feelings and thoughts on the environmental problems, including many problems with synthetic pesticides like DDT. <em />This then influenced a nationwide ban on many pesticides, including DDT. Her book lead to the inspiration of the grassroots movement and the creation of the U.S Environmental Protection Agency. Rachel Carson was also awarded the Presidential Medal of Freedom by Jimmy Carter.

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As your skateboard coasts uphill, your speed changes from 3 m/s to 1 m/s in

vlada-n [284]

Answer:

$a=-0.33\ m/s^2$

Explanation:

<u>Accelerated Motion</u>

The acceleration of a moving body is defined as the relation of change of speed (or velocity in vector form) with the time taken. The formula is given by

$\displaystyle a=\frac{\Delta v}{t}$

Or, equivalently

$\displaystyle a=\frac{v_f-v_o}{t}$

Where vf and vo are the final and initial speeds respectively. The problem gives us these values: v0 = 3 m/s, vf = 1 m/s, t = 3 seconds. Computing a

$\displaystyle a=\frac{1-3}{3}=-0.33\ m/s^2$

The negative sing of a indicates there is deceleration or decreasing speed

7 0

2 years ago

Define malleability?<br>

ad-work [718]

Answer:

Explanation:

the quality or state of being malleable: such as. a : capability of being shaped or extended by hammering, forging, etc. the malleability of tin.

5 0

3 years ago

What momentum of a 50kilogram ice skater gliding across the ice at a speed of 5m/s?

Ivenika [448]

Momentum (P) = Mass (kg) * Velocity (m/s)

P = M * V
P = 50 * 5
P = 250

So momentum is 250 kgm/s

5 0

2 years ago

Read 2 more answers

Zina [86]

I believe you are right. pH is the concentration of H+. Therefore the more acidic the more H+.

3 0

3 years ago

For a home sound system, two small speakers are located so that one is 52 cm closer to the listener than the other. What is the

galina1969 [7]

Answer:

The first frequency of audible sound in the speed sound is

f = 662 Hz

Explanation:

vs = 344 m/s

x = 52 cm * 1 / 100m = 0.52m

The wave length is the distance between the peak and peak so

d = 2x

d = 2*0.52 m

d = 1.04 m

So the frequency in the speed velocity is

f = 1 / T

f = vs / x = 344 m/s / 0.52m

f ≅ 662 Hz

7 0

3 years ago