All categories

3 years ago

Humans impact the Earth in good AND bad ways. A) True B) False

Physics

1 answer:

const2013 [10]3 years ago

7 0

Answer:

True

Explanation:

yes we can see that we are helping animals but we create pollution which is very bad

You might be interested in

An energy source forces a constant current of 2A to flow through a light bulbfilament for twenty seconds. If 4.6 kJ is given off

QveST [7]

Answer:

The voltage drop across the bulb is 115 V

Explanation:

The voltage drop equation is given by:

$V=\frac{\Delta W}{\Delta q}$

Where:

ΔW is the total work done (4.6kJ)

Δq is the total charge

We need to use the definition of electric current to find Δq

$I=\frac{\Delta q}{\Delta t}$

Where:

I is the current (2 A)

Δt is the time (20 s)

$2=\frac{\Delta q}{20}$

$q=40 C$

Then, we can put this value of charge in the voltage equation.

$V=\frac{4600}{40}=115 V$

Therefore, the voltage drop across the bulb is 115 V.

I hope it helps you!

6 0

3 years ago

A pressure of 0.01 N/cm squared is produced when a book with an area of 300cm squared is place on a table what is the weight of

lilavasa [31]

Answer:

Pressure =Area × height

0.01N/cm=300cm×height

height=0.01×300

3cm

5 0

2 years ago

Define atmospheric pressure<br>

harkovskaia [24]

Answer:

tmospheric pressure, force per unit area exerted by an atmospheric column (the entire body of air above the specified area)

6 0

3 years ago

Describe what happens to the energy of a wave if the frequency decreases and the frequency increased

Nata [24]

"As frequency increases, wavelength decreases. Frequency and wavelength are inversely proportional. This basically means that when the wavelength is increased, the frequency decreases and vice versa. Wavelength is described as the distance between a trough to a trough or a crest to a crest."

I'd recommend paraphrasing it tho.

4 0

3 years ago

Read 2 more answers

A commuter airplane starts from an airport and takes theroute. The plane first flies to city A, located 175 km away in a directi

bearhunter [10]

Answer:

245.45km in a direction 21.45° west of north from city A

Explanation:

Let's place the origin of a coordinate system at city A.

The final position of the airplane is given by:

rf = ra + rb + rc where ra, rb and rc are the vectors of the relative displacements the airplane has made. If we separate this equation into its x and y coordinates:

rfX = raX+ rbX + rcX = 175*cos(30)-150*sin(20)-190 = -89.75km

rfY = raY + rbY + rcT = 175*sin(30)+150*cos(20) = 228.45km

The module of this position is:

$rf = \sqrt{rfX^2+rfY^2} = 245.45km$

And the angle measure from the y-axis is:

$\alpha =atan(rfX/rfY) = 21.45\°$

So the answer is 245.45km in a direction 21.45° west of north from city A

6 0

4 years ago