Ask question

Ask question

All categories

2 years ago

11

How might the climate be affected if you were people drove automobiles and more people road bikes or use public transportation l

ike buses or trains

1 answer:

Hoochie [10]2 years ago

8 0

The level of greenhouse gases in our atmosphere would decrease, due to less automobiles.

You might be interested in

A person walks first at a constant speed of 5.40 m/s along a straight line from point to point and then back along the line from

rosijanka [135]

Answer: The average speed over the entire trip is 3.94 m/s

Explanation:

As we know : $speed=\frac{distance}{time}$

Let the distance of straight line from point to point be = d

Total distance covered = 2d

Time taken to cover the forward journey = $\frac{d}{5.40}$

Time taken to cover the backward journey = $\frac{d}{3.10}$

Total time for the journey = Time taken to cover the forward journey + Time taken to cover the backward journey = $\frac{d}{5.40}+\frac{d}{3.10}$

Average speed = $\frac{\text {total distance}}{\text {total time}}=\frac{2d}{\frac{d}{5.40}+\frac{d}{3.10}}=3.94m/s$

Thus average speed over the entire trip is 3.94 m/s

6 0

3 years ago

What is the heat source for rock formation

Otrada [13]

Answer:

Explanation:

The heat source for rock formation

Primordial heat: Some heat accumulated during the earth's formation and it is still available to drive the internal heat Engine of the earth. Some of these heat are used to melt rocks and produce magma.

Radioactive sources: Radioactive elements within the earth also serves as heat source for rock formation. Their spontaneous decay produce heat which are sufficient enough to generate enough thermal energy to melt and produce rocks.

6 0

3 years ago

Calculate the cenrtripetal acceleration of the Earth in

miv72 [106K]

Answer:

$0.00594\ m/s^2\ \text{towards the Sun}$

$3.54737\times 10^{22}\ N$

Explanation:

r = Distance between Earth and Sun = $1.5\times 10^{11}\ m$

Time taken to complete one rotation around Sun is given by

$T=365.25\times 24\times 3600$

Centripetal acceleration is given by

$a=\dfrac{v^2}{r}\\\Rightarrow \\\Rightarrow a=\dfrac{(\dfrac{2\pi r}{T})^2}{r}\\\Rightarrow a=\dfrac{4\pi^2r}{T^2}\\\Rightarrow a=\dfrac{4\pi^2\times 1.5\times 10^{11}}{(365.25\times 24\times 3600)^2}\\\Rightarrow a=0.00594\ m/s^2\ \text{towards the Sun}$

The centripetal acceleration of the Earth in its orbit is $0.00594\ m/s^2\ \text{towards the Sun}$

Force is given by

$F=ma\\\Rightarrow F=5.972\times 10^{24}\times 0.00594\\\Rightarrow F=3.54737\times 10^{22}\ N$

The force on the Earth is $3.54737\times 10^{22}\ N$

4 0

2 years ago

Which reaction below represents a balanced, combustion chemical reaction?

ANEK [815]

I believe the correct answer would be <span>C2H5OH + 3O2 → 2CO2 + 3H2O . A combustion reaction is one that reacts with oxygen and produces carbon dioxide and water. As you can see, option A falls into that category and is a balanced reaction.</span>

4 0

3 years ago

Read 2 more answers

a 1200 kg trailer is hitched to a 1400 kg car. the car and trailer are traveling at 72 km.h when the driver applies the brakes o

Sergio [31]

Answer:

a) 8.67m

b) 1000N

Explanation:

(a) To find the distance you use the second Newton Law for both car and trailer, in order to calculate the dis-acceleration of the system:

$F=ma\\\\a_=\frac{F}{m}=\frac{5000N+4000N}{1400kg+1200kg}=3.46\frac{m}{s^2}$

once you have this value, you use the the following kinematic equation to calculate the distance traveled by both car and trailer:

$v^2=v_o^2-2ax\\\\x=\frac{-v^2+v_o^2}{2a}$

v: final velocity=0

vo: initial velocity = 72km/h = 60 m/s

by replacing the values of these parameters you obtain for x:

$x=\frac{-0m/s+60m/s}{2(3.46m/s^2)}\\\\x=8.67m$

(b) The horizontal component of the force exerted by the trailer hitch is given by:

$F_T=5000N-4000N=1000N$

5 0

3 years ago