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Leona [35]
3 years ago
13

Describe how water can be both physical and chemical weathering.

Physics
1 answer:
Lynna [10]3 years ago
5 0

Explanation:

Both because water can fall in holes and then freeze. However, water can also be chemically react with other elements and substances to wear something away.

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The energy source used to produce most of the electrical energy in the United States is _______? Can someone help me on this?,
coldgirl [10]
<span>The energy source used to produce most of the electrical energy in the United States is Fossil fuels. Fossil fuels are generated over a long period of time by decomposition of dead flora and Fauna. Fossil fuels consists of three things- Coal, Petroleum and Natural Gas. Natural gas approx contributes 34%, Coal approx contributes 30% and Petroleum approx contributes 1% of total energy produced in US.</span>
8 0
3 years ago
What is the average speed of a car that traveled 222.0 miles in 4.596 hours?
Ratling [72]

Answer:

48.3mph

Explanation:

Given that

Distance = 222.0miles

Time = 4.596hours

Average speed = total distance/total time

= 222.0miles/4.596

= 48.3mph

Hence the average speed is 48.3mph

8 0
3 years ago
A projectile is launched with a velocity of 25 m/s at an angle of 20 degrees with respect to the horizontal. What is its initial
irina [24]

Answer:

b. 23.49 m/s

d. 8.55 m/s

d. .87 s

a. 40.8 m

Explanation:

The initial along the x-axis is given by the following formula:

V_{ox} = V_{o}Cos\theta\\\\V_{ox} = (25\ m/s)(Cos\ 20^{o})\\\\V_{ox} = 23.49\ m/s

Hence, the correct option is:

<u>b. 23.49 m/s</u>

The initial along the x-axis is given by the following formula:

V_{oy} = V_{o}Sin\theta\\V_{oy} = (25\ m/s)(Sin\ 20^{o})\\V_{oy} = 8.55\ m/s

Hence, the correct option is:

<u>d. 8.55 m/s</u>

Now, for the time to reach maximum height:

t = \frac{V_{o}Sin\theta}{g}\\\\t = \frac{(25\ m/s)Sin\ 20^{o}}{9.8\ m/s^{2}}\\\\t = 0.87\ s

Hence, the correct option is:

<u>d. .87 s</u>

<u></u>

For the range of projectile:

R = \frac{V_{o}^{2}\ Sin\ 2\theta}{g}\\\\R = \frac{(25\ m/s)^{2}(Sin\ 40^{o})}{9.8\ m/s^{2}}\\\\R =  40.9\ m

Hence, the closest option is:

<u>a. 40.8 m</u>

5 0
3 years ago
Why can a person get an electric shock when they walk across a room on a rug and touch a doorknob?
kodGreya [7K]

Electrons are added to your body as you shuffle your feet across the room. Then the shock is when they discharge from your body to the doorknob when you touch it.

6 0
3 years ago
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Hi, does anyone know what this last drop down menu would be? Thank you!
Nataly [62]
Hi Kayla
I am your friend
3 0
3 years ago
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