HELP PLEASE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!Some people consider the earth to be _____ because of its dynamic processes or cycles.

stagnant
alive
changing

Answers

Answer 1

Answer: Alive
The many processes and cycles on Earth make people think of it as being alive.

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Calculate the average speed (in km/hr) of Charlie who runs to the store 4 km away in 30 mins

Answers

First of all . . .

-- You want to know "km / hr", so you know you'll have to divide distance by time.

-- You want "km / hr", so you know the time will have to be in hours.

   30 minutes = 1/2 hour

-- Doo da division:

(4 km) / (1/2 hour)

   = (4 over 1/2) (km/hr)

   = (4 times 2/1) (km/hr)

   = 8 km/hr .

What does the ideal gas law allow a scientist to calculate that the other laws do not?a. Number of miles
b. Pressure
c. Energy
d. Volume

Answers

The ideal gas law.
PV=nRT
P=presure
V=volume
n=number of moles
R=Gas costant
T=temperature.

Answer: a. Number of moles.

Answer:

A). number of moles

Explanation:

I took the test. It is correct.

Why are nuclear power plants controversial

Answers

Because a nuclear meltdown can be caused if systems fail.

A wave has a period of 2 seconds and a wavelength of 4 meters.Calculate its frequency and speed.

Answers

f=l/t
f=4/2
f=2m/s

Hope this helps

Answer:

f = 0.5 Hz

v = 8 m/s

Explanation:

f = 1/T

f = 1/(2) = 0.5 Hz

v = λf

v = (2)(4) = 8 m/s

Which type of wave requires a medium in which to travel? A) Heat B) Electromagnetic C) Light D) Mechanic

Answers

Answer:

Explanation:

Which body is in equilibrium?(1) a satellite orbiting Earth in a circular orbit
(2) a ball falling freely toward the surface of
Earth
(3) a car moving with a constant speed along a
straight, level road
(4) a projectile at the highest point in its trajectory