Help it is timed help

Answer:

A Wheel and Axle

Explanation:

Answer:

The 5 Forces

Explanation:

The five forces that influence wind speed and direction are: Pressure gradient force (flow from high to low pressure) Coriolis force (apparent deflecting force due to the rotation of the Earth) Turbulent drag (Earth's surface or objects like trees or grass resist air flow and decrease wind speed near the ground)

Answer:

Rainforests contain around 50% of all life on Earth and only take up 6% of the Earths surface area. It contains more species of plant and animals than any other ecosystem. It's climate and geography lend it to growing more plant life which sustains many small animals. The arctic is inhospitable to most species because of the extreme cold. It's food webs do not sustain themselves well as there are fewer species at the bottom the the chain. The genetic variations are greater at the equator than the arctic giving the organisms a greater chance to survive.

Rainforests are far more diverse than arctic ecosystems because of the amount of sunlight and the rain it receives throughout the year.

Biomes can be defined as regions specified by particular biological and geographical communities that evolved because of the shared regional climate of that region.

Generally, there are mainly five major types of biomes those are forest desert grassland aquatic, and tundra.

Even though they only cover 6% of the planet's surface, rainforests are home to about 50% of all living. More plant and animal species may be found there than in any other habitat.

The high temperature of the arctic makes it uninhabitable for the majority of creatures. Because there are fewer species at the base of the food chain, its food webs are unable to support themselves.

Because there are more genetic variants around the equator than in the north, species there has a better chance of surviving.

Thus, rainforests are far more diverse than arctic ecosystems.

Learn more about biomes from here,

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Answer:

3 times louder

Explanation:

The Loudness in decibel Db  L = 10㏒(I/I₀)  where I = sound intensity level and I₀ = threshold of hearing = 10⁻¹² W/m².

Now, for Jessica, I₁ = sound intensity level of Jessica's music = 10⁻⁹

and I₂ = sound intensity level of Braylee's music = 10⁻³

So, substituting the variables into the equation, we have

L₁ = 10㏒(I₁/I₀)

L₁ = 10㏒(10⁻⁹/10⁻¹²)

L₁ = 10㏒(10³)

L₁ = 3 × 10㏒10

L₁ = 30㏒10

L₁ = 30 dB

Now, for Braylee, I₂ = sound intensity level of Braylee's music = 10⁻³

So, substituting the variables into the equation, we have

L₂ = 10㏒(I₁/I₀)

L₂ = 10㏒(10⁻³/10⁻¹²)

L₂ = 10㏒(10⁹)

L₂ = 9 × 10㏒10

L₂ =90㏒10

L₂ = 90 dB

So, the number of times Braylee's music is louder than Jessica's music is L₂/L₁ = 90 dB/30 dB = 3

So, Braylee's music is 3 times louder than Jessica's music

Answer:

3 times louder than Jessica's music

Explanation:

Answer:

2nd one

Explanation:

highest frequency shortest wavelength

Answer:

highest frequency shortest wavelength

Energy is referred to heat here

Energy be H

[tex]\\ \sf\Rrightarrow H=Pt[/tex]

[tex]\\ \sf\Rrightarrow H=100(8)[/tex]

[tex]\\ \sf\Rrightarrow H=800J[/tex]

Answer:

Idek figure it out

Explanation:

Why u so lazy?

Answer:

The length at the final temperature is 11.7 cm.

Explanation:

We need to use the thermal expansion equation:

[tex]\Delta L=\alpha L_{0}\Delta T[/tex]

Where:

So, we have:

[tex]L_{f}-L_{0}=\alpha L_{0}(T_{f}-T_{0})[/tex]

[tex]L_{f}=L_{0}+\alpha L_{0}(T_{f}-T_{0})[/tex]

[tex]L_{f}=0.115+(12.5*10^{-6})(0.115)(1221-22)[/tex]

[tex]L_{f}=0.117\: m[/tex]

Therefore, the length at the final temperature is 11.7 cm.

I hope it helps you!

Answer:  Temperature is also important because of its influence on water chemistry. ... Warm water holds less dissolved oxygen than cool water, and may not contain enough dissolved oxygen for the survival of different species of aquatic life. Some compounds are also more toxic to aquatic life at higher temperatures.

Explanation:

Answer:

For any v-t graph the acceleration is the slope of the graph. For average acceleration in a time period ‘t’ consider the change in velocity in time t and divide it by the time t. For instantaneous acceleration you need to go into the realm of differential calculus.

Explanation:

I hope this helps! I would really appreciate it if you would please mark me brainliest! Have a blessed day!

Answer:

The wavelength is 1.7cm

Explanation:

Given

See attachment for wave pattern

Required

What is the wavelength

To do this, we simply calculate the distance between successive waves (see attachment 2 for point A and B)

Using the ruler, points A and B are at:

[tex]A = 0.6cm[/tex]

[tex]B = 2.3cm[/tex]

So, the wavelength is:

[tex]\lambda = B - A[/tex]

[tex]\lambda = 2.3cm - 0.6cm[/tex]

[tex]\lambda = 1.7cm[/tex]

If approximated, the wavelength is:

[tex]\lambda \approx 2cm[/tex]

Answer:

d no light can only change things by warming them up , so it cannot cause the paper to change colur

Answer:

a) 45 s , b)    vₐ = 90 m / s, v_b = 162 m / s, c)     x_b = 3.328 10⁴ m

Explanation:

We can solve this exercise using the kinematic relations

Vehicle A

              xₐ = v₀ₐ t + ½ aₐ t²

vehicle B

starts two seconds later

             x_b = v_{ob} (t-2) + ½  a_b (t-2) ²

as cars start from rest their initial velocities are zero

at the point where they meet, the position must be the same for both vehicles

             xa = 0 + ½ aₐ t²

             xb = 0 + ½ a_b (t-2) ²

             ½ aₐ t² = ½ a_b (t-2) ²

            [tex]\sqrt{ \frac{a_a}{a_b} }[/tex] t = (t-2)

              t (1 - \sqrt{  \frac{a_a}{a_b} }) = 2

             t (1 - ⅔, ) = 2

            t = 2 / 0.4444

             t = 45 s

b)

the speed of each car

                vₐ = voa + aa t

                vₐ = 0 + 2 45

                vₐ = 90 m / s

                v_b = 3.6 45

                v_b = 162 m / s

c) xb = 0 + ½ ab (t-2) ²

       x_b = ½ 3.6 (45-2) ²

       x_b = 3.328 10⁴ m

Answer:

Prokaryotes are single-celled organisms that do not have a nucleus or any membrane-bound organelles. Eukaryotes are single-celled or multi-celled organisms that do contain a nucleus and membrane-bound organelles

Answer:

13 m/s²

Explanation:

Mass of object = 200 Kg

Applied force = 2600 N

Acceleration  = ?

Solution:

Definition:

The acceleration is rate of change of velocity of an object with respect to time.

Formula:

a = Δv/Δt

a = acceleration

Δv = change in velocity

Δt = change in time

Units:

The unit of acceleration is m.s⁻².

Acceleration can also be determine through following formula,

F = m × a

a = F/m  (N = kgm/s²)

a = 2600 kgm/s² / 200 Kg

a = 13 m/s²

[tex]\\ \rm\longmapsto F=ma[/tex]

[tex]\\ \rm\longmapsto a=\dfrac{F}{m}[/tex]

[tex]\\ \rm\longmapsto a=\dfrac{2600}{200}[/tex]

[tex]\\ \rm\longmapsto a=13m/s^2[/tex]

Answer:

The force of friction that the driveway exerts on the ladder ≈ -176.03 N

Please see attached force diagram created with MS Visio

Explanation:

The height of the house painter above the ground = 3.00 m

The length of the ladder = 5.00 m

The height above the ground at which the ladder leans on the wall = 4.70 m

The weight of the painter = 676 N

The weight of the ladder = 107 N

The angle of inclination of the ladder, arcsin(4.7/5) ≈ 70.05°

For equilibrium, the sum of moments at a point, ∑M = 0

Taking moment about point A gives;

4.7 × R = 107 × 2.5 × cos(arcsin(4.7/5)) + 676 × 3.0/(tan(arcsin(4.7/5)))

R = (107 × 2.5 × cos(arcsin(4.7/5)) + 676 × 3.0/(tan(arcsin(4.7/5))))/4.7 ≈ 176.03

The reaction force at the top of the ladder, R ≈ 176.03 N

For equilibrium, we have;

The sum of the horizontal forces, ∑Fₓ = 0

The reaction at the top of the ladder, R + The force of friction that the driveway exerts on the bottom of the ladder, [tex]F_R[/tex] = 0

R + [tex]F_R[/tex] = 0

∴ R = [tex]-F_R[/tex]

R ≈ 176.03 N = [tex]-F_R[/tex]

∴ [tex]F_R[/tex] = -176.03 N

Therefore, the force of friction that the driveway exerts on the bottom of the ladder, [tex]F_R[/tex] ≈ -176.03 N (acting away from the wall).

With less ice, it could greatly affect the animals that depend on the ice, such as polar bears, walruses, and many other animals. This could result in their species eventually going extinct.

Answer:

flux melting

Explanation:

Flux melting is the process that causes magma to form. Flux melting happens when water or carbon dioxide exists added to rock.

When rock is exposed to water or carbon dioxide, flux melting occurs. The rock melts at lower temperatures as a result of these substances. This causes magma to form where it had a solid structure before. Around subduction zones, flux melting also happens, much like heat transfer.

Flux melting happens in igneous petrology and volcanology when water and other volatile substances are added to hot solid rock, depressing the solidus. Flux is a material, such as salt, that produces a mixture with a metal oxide that has a low melting point (liquidus) in engineering and metallurgy.

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Answer:

To accurately respond to stimuli, the brain relies on information communicated by sensory neurons. Sensory neurons detect inputs from the environment, convert them into signals (electrical impulses), and pass the information on to the brain and spinal cord, where a response can be generated.

Explanation:

Answer:

C

Explanation:

Am increase in velocity?

Answer:

change in mass is not acceleration

Answer:

i dont know sir

Explanation:

Answer:

The correct answer would be Saturn's Cassini Division.

Explanation:

Read about it here.

https://caps.gsfc.nasa.gov/simpson/kingswood/rings/

Hope this helps! :)

Heat energy is also called thermal energy.

Answer:

D

Explanation:

Answer:

1.They are constructed of a large pouch containing a dry chemical plus an inner pouch of water. The hot/cold pack is activated by breaking the seal on the pouch of water and shaking the pack vigorously. This action mixes the water