this is life science

Answer: someone took down my answer I don’t know why when I took this test and got it right but the answer is C like the other person said.

Explanation:

The microwave radiation referred to in this context is radiation that was released as matter formed in the early universe. Therefore option A is correct.

Microwave radiation, also known as cosmic microwave background radiation (CMB), is a faint radiation that permeates throughout the universe.

It is considered to be the remnants of the thermal radiation released shortly after the Big Bang, during a phase called recombination. At this time, the universe transitioned from a hot, dense plasma to a state where neutral atoms could form, allowing photons to travel freely.

The cosmic microwave background radiation is isotropic, meaning it is uniformly distributed in all directions, and it has a characteristic temperature of approximately 2.7 Kelvin (-270.45 degrees Celsius).

It was first detected in 1965 by Arno Penzias and Robert Wilson, who were awarded the Nobel Prize in Physics for their discovery.

The presence of cosmic microwave background radiation provides strong evidence for the Big Bang theory and helps to support the understanding of the early universe's formation and evolution.

It serves as an important tool for studying cosmology and provides insights into the structure, age, and composition of the universe.

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Answer:wind

Explanation:

The natural resource that is renewable is wind. Explanation on wind as a renewable resource can be found below.

Renewable resources are those resources that is replenished or replaced by natural processes at a rate comparable to its rate of consumption by humans or other users.

Renewable resources cannot be exhausted as a result of use, unlike, their non-renewable counterparts.

Examples of renewable natural resources are as follows:

Therefore, the natural resource that is renewable is wind.

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First thing's first, we need to find the Net Force of the system in order to solve for acceleration. Gravity and Normal Force cancel out, so we don't really have to worry about anything on the y-axis. However, looking at the x-axis, we see two forces: the Force of the push and Frictional Force.

This means that:

[tex]F_{net}[/tex] = 500 - 100

[tex]F_{net}[/tex] = 400 (N)

Recall that Force = Mass * Acceleration. Since we have the Force and Mass, we can easily solve for Accel:

F = ma

a = [tex]\frac{F}{m}[/tex]

Plug the net force and mass into the equation:  

a = [tex]\frac{F}{m}[/tex]

a = [tex]\frac{400}{50}[/tex]

a = 8 (m/[tex]s^{2}[/tex])

The box's acceleration is 8 m/[tex]s^{2}[/tex]

If you have any questions about how I got to the answer, just ask :)

Explanation:

The pH scale is an index ranging from 0-14 which measures the acidity or basicity of substances. The closer the pH of an acid to 0 the stronger it is and the closer the pH of a base to 14,the stronger it is.

Answer:B

Explanation:i think so im not suree

A sailboat that is tied up at the dock will experience tension force and gravity. Therefore, option (D) is correct.

Tension can be described as a force acting along the flexible length of a medium such as a rope, string, or cable, or a force carried by a flexible medium.

Tension can be defined as an action-reaction pair acting at each end of the elements. For a rope, tension is present in every section of the rope or string in both directions, apart from their endpoints. Each endpoint of the rope will experience tension and force from the weight attached to it.

Tension can also be defined as a pulling force but the tension is not a pushing force. Ropes or strings are used to exert forces since they transfer a force over a specific distance.

Therefore, sailboats experience the tension force due to the rope with which it is tied at the dock and the force due to gravity.

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Answer:

c

Explanation:

energy doesnt affect to mass of a object

Answer:

10.791 kJ

Explanation:

Given that,

Mass of the skier, m = 58 kg

Initial position, h₁ = 24 m

Final position, h₂ = 19 m

We need to find the kinetic energy do they have at the top of the second hill.

Using the conservation of energy for both positions.

[tex]v_1=\sqrt{2gh_1} \\\\=\sqrt{2\times 9.8\times 24} \\\\=21.68\ m/s[/tex]

And

[tex]v_2=\sqrt{2gh_2} \\\\=\sqrt{2\times 9.8\times 19} \\\\=19.29\ m/s[/tex]

Kinetic energy :

[tex]K=\dfrac{1}{2}mv_2^2\\\\K=\dfrac{1}{2}\times 58\times 19.29^2\\\\=10791.01 J\\\\=10.791\ kJ[/tex]

So, the kinetic energy they have at the top of the second hill is 10.791 kJ.

Answer:

bowling

Explanation:

bowling is an example of work because it involves hand movement.

Answer:

56N

Explanation:

Given parameters:

Distance  = 40m

Work done  = 2240J

Unknown:

Force exerted  = ?

Solution:

The work done on a body is the force applied to move a body through a certain distance.

           Work done  = Force x distance

 Now insert the parameters and solve for the force

          2240  = Force x 40

           Force  = 56N

Answer:

B

Polar covalent bonds and van dar Waals forces are weak attractive forces between discrete molecules of a simple molecular structure.

Ionic bonds are strong electrostatic forces of attraction between oppositely charged ions.

Hydrogen bonds are very strong bonds between hydrogen and a highly electronegative atom e.g Oxygen, fluorine, nitrogen

Answer:

they have same acceleration 2m/s^2

Explanation:

a =v-u/t

65-60/2.5

2m/s^2

a) The acceleration of the car and the bicycle are equal since [tex]\delta V[/tex] for both vehicle is 5km/h and the time taken for both vehicle is also the same 2.5s.

b) The acceleration of the bicycle is 0.556m/s²

Given the data in the question;

Since the bicycle starts from rest

a)

The acceleration of the car and the bicycle are equal since [tex]\delta V[/tex] for both vehicle is 5km/h time taken for both vehicle is also the same 2.5s.

b)

The acceleration of each vehicle

To determine the acceleration for car and the bicycle, we use the first equation of motion:

[tex]v = u + at[/tex]

Where v is the final velocity, u is the initial velocity, a is the acceleration and t is the time.

Now, For the car;

[tex]18.0556m/s = 16.667m/s + ( a + 2.5s )\\\\a = \frac{18.0556m/s - 16.667m/s }{2.5} \\\\a = \frac{1.3886m/s}{2.5s} \\\\a = 0.556 m/s^2[/tex]

Hence, the acceleration of the car is 0.556m/s²

For the bicycle;

[tex]1.38889m/s = 0 + ( a * 2.5s )\\\\a = \frac{1.38889m/s}{2.5s}\\\\a = 0.556m/s[/tex]

Hence, the acceleration of the bicycle is 0.556m/s²

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Answer:

Check the diagram from the photo

Explanation:

Answer:

the answer is 104568948 degress

Explanation:

yeeeeeee

Answer:its b

Explanation:

Answer:

Without volcanoes, most of Earth's water would still be trapped in the crust and mantle . Early volcanic eruptions led to the Earth's second atmosphere, which led to Earth's modern atmosphere . Besides water and air, volcanoes are responsible for land, another necessity for many life forms .

Explanation:

Answer:

They are deflected as Earth’s magnetic field exerts force on them.

Explanation:

(Not for cheating, Just to help)

As solar wind approaches Earth, what happens to the charged electrons?

They are absorbed as Earth’s magnetic field exerts force on them.

They grow stronger as Earth’s magnetic field exerts force on them.

They grow weaker as Earth’s magnetic field exerts force on them.

They are deflected as Earth’s magnetic field exerts force on them.

First, the electron absorbs energy to move to a higher energy level.

Answer:

D. 2 m/s north

Explanation:

Hailey was riding her bike at 4 m/s and was changed to 6 m/s so there was 2 more m/s added.

Answer:

hope this answers will help you

Explanation:

If you find it appropriate then plz mark as brainliest

Answer:

10 N

Explanation:

Force = Mass÷Acceleration

F= 50 ÷ 5

= 10 N

______________________

Acceleration =

[tex] \frac{5 - 25}{4 } [/tex]

= 5m/s2

Given:

As we know,

The acceleration will be:

= [tex]\frac{5-25}{4}[/tex]

= [tex]5 \ m/s^2[/tex]

hence,

The force will be:

→ [tex]F = \frac{m}{a}[/tex]

By substituting the values, we get

      [tex]= \frac{50}{5}[/tex]

      [tex]= 10 \ N[/tex]

Thus the above response is right.  

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Answer:

In physics, work means the use of force to move an object. ... Not all force that is used to move an object does work. For work to be done, the force must be applied in the same direction that the object moves

The use of force to move an object is called Work.

A force can change the motion of an object. A force causes an object with mass to change its velocity (acceleration).

[tex]\bold{Force = Mass\times acceleration}[/tex]

while work is the result of the action when a force causes an object to move in the direction of the force.

[tex]\bold{Work= Force\times Displacement}[/tex]

Therefore, the use of force to move an object is called Work.

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Answer:

P = 450 J

Explanation:

Given that,

Mass of a child, m = 18 kg

The vertical distance from the top to the bottom of the slide is 2.5 metres.

The Gravitational field strength = 10 N/kg

We need to find the decrease in gravitational potential energy of the child sliding from the  top to the bottom of the slide.

The formula for the gravitational potential energy is given by :

P = mgh

Substituting all the values,

P = 18 kg × 10 m/s² × 2.5 m

P = 450 J

Hence, the decrease in gravitational potential energy is 450 J.

Answer:

Explanation:

The answer should be electromagnetic radiation(can i have a a brainliest) please

The increased levels of ultraviolet -radiation reaching earth can lead to health risks such as sunburn and skin cancer.

Ultraviolet radiation is a high energy wave in the electromagnetic spectrum. The mains source of ultraviolet or UV rays is sun.

The electromagnetic spectrum is the arrangement of radiation based on the increasing order of energy or decreasing order of frequency. UV rays comes in between infra red radiation and visible light.

There are two type of ultraviolet rays namely UV-A and UV-B. In which UV-A has higher penetrating power and causes serious health risks than UV-B.

Reaching UV rays in an increased level to the earth surface will affect human beings as well as other organisms. It causes skin cancer, nausea, burning and other  diseases.

Therefore the two words which suits to fill the statement is UV radiation.

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Answer:

The answer to this question is given below in this explanation section.

Explanation:

            "What element has conductivity,shiney luster,magnetic

-science"

silicon has a shiny luster,But it is brittle and conducts electricity poorly.Some metalloids change their characteristics when they react with different elements.Luster conductivity and malleability are physical properties can be observed be observed without attempting to change the identity of the substance.The term physical property is an observable characteristics of a substance. in this case the luster conductivity and malleability of metals are the properties, which can be observed  by our senses.It differs from chemical properties which can only be observed when the substance change its chemical identity.

Metal are solid at room temperature with the exception of mercury which is liquid at room temperature.Luster metal have the quality of reflection light from its surface and can be polished e.g gold,silver and copper.

Explanation:

acceleration is the Changing of throut per unit time ....

and in uniform motion .....

in that the speed of an object is uniform means same

Answer:

well they make the siren go beacaus eyou are doing somthing wrong so what were you thinking

Explanation:

Unit to measure red blood cell is million per cubic millimeter

A red blood cell, also called a hematopoietic cell, hemocyte, is a cell produced through hematopoiesis and found mainly in the blood

Unit to measure red blood cell is million per cubic millimeter

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Answer:

All adjustments in issue include changes in energy. Energy is either delivered or consumed. The energy is often in the form of heat, however it might be in the form of sound or light.

Explanation:

this is in my own words btw:)

Explanation:

The reason for this phenomenon is the due to the condition by which each type of rocks form.

A sedimentary rock is formed by the compaction and lithification of sediments within a basin.

A metamorphic rock forms under high temperature and pressure conditions which alters the minerology of a rock.

Answer:

The heat and pressure of metamorphism would deform the fossil, and the process of melting would destroy the fossil completely.

Explanation:

PLATO

Answer:

Im not sure, are there options for it?

Explanation:

Answer:Two dimensional forms can create the illusion of 3 dimensional shapes and spaces.

Explanation: