what is physical fitness? 1) the improvement of the body through inteninoal movement 2) the speed at which the body moves during exersize 3) the ability of the body to function of the body to function efficiently during exercise D) the preformence of mucles for long periods of time

Explanation:

direction of electric field is same as that of force experienced by the test charge

Answer:

Comments/Reasoning                                               Calculations/Results

I used the equation for calculating electric field strength. E = F/q

I substituted the values of F and q in the equation to get

this value of E                                                              E= (4.1 x10-1)/(8.5 x10-7)                                                                                                                  

The electric field strength is                                4.8 × 105 newtons/coulomb

Explanation:

edmentum sample answer

Answer:

Velocity has both speed and direction. Speed is constant. ... Speed is measured over time.

Explanation:

Answer:

water or conduct experiment requiring the water to be in liquid state. A coffee

addicted physicist stationed at a research base requires about 0.8 kg of ice for

his coffee on the hour.

a. How much heat is required to convert 0.8 kg of ice at -35 °C into steam

at 100°C?

[5]

b. Plot the temperature - energy graph for the processes in (a). [5]

C. The surface tension of water was determined in a laboratory by using

the drop weight method. 100 drops were released from a burette the

inner diameter of whose opening is 1.8 mm. The mass of the droplets

was 3.78 g.

i. Determine the surface tension of the water and, comparing it

with the tabulated value,

161

ii. Calculate the relative error of the measurements.

Answer:

2m/s

.................

Explanation:

The characteristics for a shower connected in summer and winter positions is 220 V - 2200 W / 4400 W.

It means lowest power is 2200 W and highest power is 4400 W

For lowest power,

[tex]P=VI[/tex]

I = electric current for summer

[tex]I=\dfrac{P}{V}\\\\I=\dfrac{2200}{220}\\\\I=10\ A[/tex]

For highest power,

[tex]P'=VI'[/tex]

I' = electric current for winters

[tex]I'=\dfrac{P}{V}\\\\I'=\dfrac{4400}{220}\\\\I'=20\ A[/tex]

Hence, for lowest power, current is 10 A ad for highest power, current is 20 A.

Answer:

greenhouse gas is a gas that absorbs and emits radiant energy within the thermal infrared range

Explanation:

Animals and plants need to get rid of carbon dioxide gas through a process called respiration. Carbon moves from fossil fuels to the atmosphere when fuels are burned.

Answer and explanation:

Greenhouse gases are carbon dioxide, water vapor, fluorinated gases, nitrous oxide, methane, and others. Carbon dioxide enters the atmosphere by respiration of plants, animals, and microbes. Plants also remove carbon dioxide during photosynthesis. The net result is that plants remove more carbon dioxide than they contribute. Microbes and fungi that decompose plants and animals also return the carbon to the atmosphere as carbon dioxide. These are all ways nature cycles carbon. Humans contribute carbon dioxide to the atmosphere when we burn wood, solid waste, and fossil fuels. When forests are burned to clear land, not only does the burning release carbon dioxide, but it eliminates trees that would otherwise be removing carbon dioxide by photosynthesis. Most of the human contribution is from burning fossil fuels in electrical power plants that burn coal or natural gas and in vehicles that run on petroleum products. Other industrial processes also contribute carbon dioxide to the atmosphere, but to a lesser extent.

Answer:

4.4 M/s

Explanation:

Answer:

Michael Faraday

Explanation:

Electromagnetic Induction was first discovered way back in the 1830's by Micahel Faraday. Faraday noticed that when he moved a permanent magnet in and out of a coil or a single loop of wire it induced an ElectroMotive Force or emf, in other words a Voltage, and therefore a current was produced.

Answer: The redshift occurs because the starts are moving away from the earth.

Explanation:

Every object emits wavelength from its body. When it comes to universe there are some visible light emitted by the stars and other objects in galaxy.

If a star is moving towards the sun then it emits a shorter wavelength compared to the source which is at rest. This is blue in color called as blue shift.

But when it comes to stars they move away from the earth and hence emits longer wavelength called as red shift.

As the object it at rest it more towards the blue side and when the objects starts moving it starts moving towards the red side in the visible spectrum.

So, when the starts moves away from the earth it forms a Redshift.

When observed from Earth, the wavelengths of light emitted by a star are shifted toward the red end of the electromagnetic spectrum because: the star is moving away from planet Earth.

A star is a giant astronomical or celestial object that contains a luminous sphere of plasma and bounded together by its own gravitational force.

A redshift can be defined as a displacement (shift) of the spectral lines of celestial or astronomical objects toward longer wavelengths (the red end of an electromagnetic spectrum), as a result of the Doppler effect.

Hence, a redshift is considered to be a subtle change in the color of visible electromagnetic radiation from stars (starlight), as observed from planet Earth.

In conclusion, a redshift occur when observing a star from planet Earth because the star is moving away from planet Earth.

Read more: https://brainly.com/question/17934476

Answer:

12010

Explanation:

Given:

power    time

4,370     25

4,420     22

4,150      26

To find: difference in energy used between the dryer that uses the greatest amount of energy and the dryer that uses the least amount

Solution:

Energy = power × time

For clothes dryer x:

energy = 4370 × 25 = 109250

For clothes dryer y:

energy = 4420 × 22 = 97240

For clothes dryer z:

energy = 4150 × 26 = 107900

Dryer x uses the greatest amount of energy and dryer y uses the least amount of energy.

Difference in energy used between the dryer that uses the greatest amount of energy and the dryer that uses the least amount = 109250 - 97240 = 12010

Answer:

.20 kWh

Explanation:

its right on edge

Answer:

d = 0.015m

Explanation:

To find the thickness of the antireflective coating you take into account that waves must reflect and interfere destructively between them. A wave travels twice the thickness d of the coating, and for the destructive interference it is necessary that the reflected wave is (m+1/2) factor of the incident wave. Thus, you have:

[tex]2d=(m+\frac{1}{2})\lambda_n[/tex]

d: thickness of the coating

m: order of the interference (m=1 for the minimum thickness)

λn: wavelength of light inside the coating

You first calculate the wavelength of the wave:

[tex]\lambda=\frac{c}{f}=\frac{3*10^8m/s}{10*10^9Hz}=0.03m[/tex]

[tex]\lambda_{coating}=\lambda_n=\frac{n_{air}}{n_{coating}}\lambda_{air}\\\\\lambda_n=\frac{1}{1.50}(0.03m)=0.06m[/tex]

Then, you replace the values of m and λn in order to calculate d:

[tex]d=\frac{1}{2}(m+\frac{1}{2})\lambda_n[/tex]

[tex]d=\frac{1}{2}(0+\frac{1}{2})(0.06m)=0.015m=1.5cm[/tex]

hence, the thickness of the antireflective coating must be 0.015m

Answer:

(a) a = (2i + 4.5j) m/s^2

(b) r = ro + vot + (1/2)at^2

Explanation:

(a) The acceleration of the particle is given by:

[tex]\vec{a}=\frac{\vec{v}-\vec{v_o}}{t}\\\\[/tex]

vo: initial velocity = (3.00i -2.00j) m/s

v: final velocity = (9.00i + 7.00j) m/s

t = 3s

by replacing the values of the vectors and time you obtain:

[tex]\vec{a}=\frac{1}{3s}[(9.00-3.00)\hat{i}+(7.00-(-2.00))\hat{j}]\\\\\vec{a}=(2\hat{i}+4.5\hat{j})m/s^2[/tex]

(b) The position vector is given by:

[tex]\vec{r}=\vec{r_o}+\vec{v_o}t+\frac{1}{2}\vec{a}t^2[/tex]

where vo = (3.00i -2.00j) m/s and a = (2.00i + 4.50j)m/s^2

Answer: The law of conservation of linear momentum helps to understand the behavior of a Newton's cradle In a closed system. This law is nothing more than action and reaction.it can be used to predict the resulting direction and speed of motion of objects after they collide.

Explanation: Just as an example, when you play pool/8ball, the white play exerts force on the other balls causing them to break away.

hope this helps.

Answer:

The force acting in x direction is 34.44 N

Explanation:

We have,

Force acting on the box is 65 N at an angle of 58 degrees to the horizontal the surface of frictional.

It is required to find the net force in x- direction.

The net force acting in the x- direction is given by :

[tex]F_x=F\cos\theta\\\\F_x=65\times \cos(58)\\\\F_x=34.44\ N[/tex]

So, the force acting in x direction is 34.44 N.

I think tomato is acid

Answer:

acid

Explanation:

tomatoes contain acids such as citric acid, ascorbic acid, abscisic acid etc.

this indicates that they are  acidic

Answer:

can you please translate to english?

Explanation:

Answer:

C. Electromagnetic waves are longitudinal waves

Explanation:

Answer:

the answer is c

Explanation:

Answer:

the mental and physical activities carried out by using energy are generally termed as work

Answer:

A. evaporation

Explanation:

Evaporation is a surface phenomenon as the molecules of the surface gets sufficient energy to overcome the force of attraction which will help in converting to the vapor phase.

A. The amount of water. 50/50

Answer:

Work done is 12000 J

Explanation:

We have,

Voltage of a battery is 12 V

Charge supplied by the battery is 1000 C

Let us assume to find the work is done by the battery in moving the charge. The work done is given in terms of voltage as :

[tex]W=qV\\\\W=1000\times 12\\\\W=12000\ J[/tex]

So, the work of 12000 J is done by battery in moving charges.

Answer:

[tex]E=\dfrac{1}{2}mv^2[/tex]

Explanation:

If m is the mass of the object and v is the velocity of the object. The kinetic energy is due to the motion of an object. It is given by the relation as follows :

[tex]E=\dfrac{1}{2}mv^2[/tex]

The above formula is used to find the kinetic energy of an object.

Answer:

Speed of wave = 1,215 m/s

Explanation:

Given:

Frequency of wave = 30 Hz

Wavelength = 40.5 m

Find:

Speed of wave = ?

Computation:

⇔ Speed of wave = Frequency of wave × Wavelength

⇔ Speed of wave = 30 Hz × 40.5 m

⇔ Speed of wave = 1,215 m/s

Therefore, speed of wave is 1,215 meter per second.

Answer:

x-rays

Explanation:

Answer

Energy

Explanation

wave is a disturbance which travels through a medium carrying energy from one point to another without causing any permanent displacement in that medium. So energy is carried by a wave.

Answer:

A is true

Explanation:

Other all are wrong I guess

Answer: The Answer is A

Explanation:

I'm not sure but

P = Momentum

P = Mass x Velocity

P = (M XV)^2

P^2

Answer:

where the rocks are exposed to really hot conditions and high pressure....these conditions are found deep where tectonic plates meet or deep inisde the earth past our core

hope this helps !!!!!

Answer:

high heat, high pressure, hot mineral-rich fluids or commonly a combination of these found deep in the Earth or where tectonic plates meet.

Explanation:

I hope this helps :3

Answer:

The state of being without reliablr access to a sufficient quantity of affordable, nutritious food