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3 years ago

How does paving parking lots and roads with concrete or asphalt affect surface water and groundwater?

1 answer:

7 0

Parking lots with roads and concrete reduce infiltration. Infiltration is the process by which water penetrates the soil. Reducing the amount of water that enters the soil can eventually impact groundwater levels in some areas by decreasing it over time. Paved roads lead to increased surface runoff which increases the possibility of flooding in periods of heavy rainfall. This is known as urban flooding.

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If a system absorbs 155.0 kJ of heat from its surroundings and the system does 45.0 kJ of work on its surroundings, what is the

Ede4ka [16]

The change in the internal energy of the system is 110 kJ.

<h3>What is internal energy?</h3>

Internal energy is defined as the energy associated with the random, disorder motions of molecules.

calculate the change in internal energy, we apply the formula below.

Formula:

ΔU = Q-W.................... Equation 1

Where:

ΔU = Change in internal energy
Q = Heat absorbed from the surroundings
W = work done by the system

From the question,

Given:

Q = 115 kJ

W = 45. 0 kJ

Substitute these values into equation 1

ΔU = 155-45

ΔU = 110 kJ

Hence, The change in the internal energy of the system is 110 kJ.

Learn more about change in internal energy here: brainly.com/question/4654659

4 0

3 years ago

The illustration in figure below shows a uniform metre rule weighing 30 N pivoted on a wedge placed under the 40 cm mark and car

Nitella [24]

Answer:

W = 30 N

Explanation:

Applying the summation of torques about the wedge for equilibrium, taking the clockwise direction as negative. Since the ruler is balanced horizontally about the wedge. Therefore, the summation of all torques acting about the wedge must be equal to zero.

$(70\ N)(40\ cm - 10\ cm)-(30\ N)(50\ cm-40\ cm)-(W)(100\ cm - 40\ cm) = 0\\W(60\ cm) = (70\ N)(30\ cm)-(30\ N)(10\ cm)\\\\W = \frac{1800\ N.cm}{60\ cm}$

6 0

3 years ago

What is the difference between a learner's license and a operator's licence

Lelu [443]

A learner's license, like the name suggest (learner), you are just beginning to drive and are "learning" the basics of the car.
For a operator's license, you can drive on your own, you have the knowledge and skills and have taken the required courses and passed them.

6 0

3 years ago

Read 2 more answers

Two particles of masses m and 3m are moving toward each other along the x-axis with the same speed v. They undergo a head- on el

astra-53 [7]

Answer:0

Explanation:

Given

two particles of mass m and 3m

They move towards each other with velocity v

As the collision is Elastic therefore value of coefficient of restitution is 1

$e=1$

$e=\frac{Relative\ speed\ after\ collision}{Relative\ speed\ before\ collision}$

if $u_1$ and $u_2$ are velocity of approach of m and 3 m

and $v_1$ and $v_2$ are velocity after collision respectively

therefore

$v_2-v-1=u_1-u_2$

$v_2-v_1=v-(-v)$

$v_2-v_1=2 v$

conserving momentum

$m\cdot v+3m\cdot (-v)=3m\cdot (v_2)+m\cdot v_1$

$-2mv=3mv_2+m(v_2-2v)$

$4mv_2=0$

$v_2=0$

Therefore velocity of heavier mass is zero

8 0

3 years ago

Read 2 more answers

FILL IN THE BLANK. immediately following the arrival of the stimulus at a skeletal muscle cell there is a short period called th

Marrrta [24]

Immediately following the arrival of the stimulus at a skeletal muscle cell, there is a short period called the latent period during which the events of excitation-contraction coupling occur.

This process is a connection between transduction in the sarcolemma and the initiation of muscle contraction. Sarcolemma is nothing but the cell membrane of skeletal muscle.

A single muscle twitch has a latent period, a contraction phase when tension increases and a relaxation phase when tension decreases.

The period of incubation, the interval preceding exposure to a pathogen toxin or radiation, and when effects occur. Muscle contracting, the time between a nerve stimulus and muscle contraction.

To know more about muscles:

brainly.com/question/13753345

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6 0

1 year ago