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3 years ago

How can submarines use echolocation to tell how close they are to the bottom of the ocean?

2 answers:

6 0

Answer:Sample Response: Submarines can release sound waves. These sound waves will hit the bottom of the ocean and be reflected back to the submarine as echoes. The submarine can use these echoes to tell how far it is from the bottom of the ocean.

Explanation: just answered this and this was the answer 100 percent

Lapatulllka [165]3 years ago

3 0

To locate a specific target or to determine how close submarines are to the seafloor, they use active and passive sound navigation and ranging (or a SONAR, in simple terms.) It emits pulses of sound waves that travel through the water, reflect off the target and relayed back to the ship. By determining how fast the sound wave travels back, the computers on the sub calculate how far they are from the target.

Hope this helps.

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Imagine that you work for a conservation organization. Your job is to make recommendations to restore an area of a prairie that

ella [17]

Answer:

The damaged prairie area can be restored through site preparation, replanting and putting species back on the landscape.

Explanation:

Prairie- this is a type of habitat with mostly grasses. It also consists of trees, occasional shrubs and flowering plants. This can be found around the world and is ecologically important for providing habitats for native animals and insects. It is perfectly adapted to the climate and requires minimal maintenance.

Once a prairie is damaged, it becomes an essential move to restore it immediately. This can be done through different human activities such as the following:

1. Site preparation- before doing anything else, it would be best to prepare the prairie site by removing debris from the fire. This will make everything easier once you start planting the crops or plants.

2. Replanting- this is probably the most essential move you can do. It would be best to plant high quality food plants that would provide nectar, pollen and seeds throughout the season. This will entice many birds and butterflies into the area. It will also make the native plants abundant which will, in turn, increase ecological diversity.

3. Putting species back on the landscape- when a wildfire occurs, it is a common sense that species also run away from their home (habitat). In order to create that natural habitat again, it would be best to put the species back to where they belong so they can restart their lives. This will resume the natural food webs and nutrient cycles.

7 0

4 years ago

Seeing a police officer ahead and not being sure of the speed limit, a driver slows from 65 mi/hr to 55 mi/hr in 4.0 seconds, tr

Flauer [41]

Answer:

$-1.13 m/s^2$

Explanation:

The acceleration of the car is given by:

$a=\frac{v-u}{t}$

where

v is the final velocity

u is the initial velocity

t is the time

Here we have to convert the velocities from mi/hr to m/s. Keeping in mind that

1 mi = 1609 m

1 h = 3600 s

We get:

$u = 65 mi/h \cdot \frac{1609}{3600}=29.1 m/s\\v = 55 mi/h \cdot \frac{1609}{3600}=24.6 m/s$

While the time interval is

t = 4.0 s

Substituting,

$a=\frac{24.6 - 29.1}{4.0}=-1.13 m/s^2$

3 0

3 years ago

What is diffuse and specular scattering

-BARSIC- [3]

Answer:

Diffuse reflection is the reflection of light or other waves or particles from a surface such that a ray incident on the surface is scattered at many angles rather than at just one angle as in the case of specular reflection. ... Many common materials exhibit a mixture of specular and diffuse reflection.

Explanation:

3 0

3 years ago

Explain why gases are more compressible than solid

Oduvanchick [21]

Answer:

If we put pressure on a solid or a liquid, there is essentially no change in volume. ... The kinetic-molecular theory explains why gases are more compressible than either liquids or solids. Gases are compressible because most of the volume of a gas is composed of the large amounts of empty space between the gas particles.

Explanation:

7 0

3 years ago

The total weight of a car with passengers is 30,000N. The area of contact of each of the four tyres with the ground is 0.025m2.

vlabodo [156]

Answer:

The minimum pressure car tire pressure is 300,000 Pa

Explanation:

Pressure

It's a measure of the force exerted by an object per unit surface:

$\displaystyle P=\frac{F}{A}$

Where F is the force applied on a surface area A.

We are given the total weight of a car with passengers as Ft=30,000 N and we also know the area of contact of each tire with the ground as $A=0.025 m^2$ .

The minimum pressure each tire can have is when the total weight is evenly distributed in all four tires, thus F=Ft/4=7,500 N.

Calculating the pressure:

$\displaystyle P=\frac{7,500}{0.025}$

P=300,000 Pa

The minimum pressure car tire pressure is 300,000 Pa

7 0

3 years ago