HELP ASAP !!! !!!!!!!

Answer:

SI system - a complete metric system of units of measurement for scientists; fundamental quantities are length (meter) and mass (kilogram) and time (second) and electric current (ampere) and temperature (kelvin) and amount of matter (mole) and luminous intensity (candela); "Today the United States is the only country

Explanation:

hope this helps u, sorry if it doesn't.

Answer:

International System of Units (SI), French Système International d'Unités, international decimal system of weights and measures derived from and extending the metric system of units. Adopted by the 11th General Conference on Weights and Measures (CGPM) in 1960, it is abbreviated SI in all languages

Answer:

200j

Explanation:

The kinetic energy just as it reaches the ground is 200J.

Potential energy is defined as the energy stored within an object that exists as a result of the state, position or arrangement of the object. It is one of the two primary forms of energy while the other is kinetic energy. The stored energy is released when there is a change in the state, position or arrangement of the object.

This is the stored energy which depends upon the relative position of various parts of a system such as a spring has more potential energy when it is compressed or stretched.

Initially the potential energy of the body is 200 J but when it is released, its potential energy is converted into kinetic energy. When the body just touches the ground, the kinetic energy becomes equal to the potential energy.

Thus, the kinetic energy just as it reaches the ground is 200J.

Learn more about Potential energy, here:

https://brainly.com/question/24284560

#SPJ2

Answer:

+1

-1

Explanation:

The oxidation number of Na in NaCl is +1 and that of Cl is -1.

When NaCl is oxidized we have;

        NaCl →  Na⁺  + Cl⁻

In this process, Na will lose an electron to become Na⁺ and thus isoelectronic with Ne, Cl will gain the electrons to become Cl⁻ and thus isoelectronic with Argon.

Answer:

Explanation:

The mass of an object can be found by using the formula

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

f is the force

a is the acceleration

From the question we have

[tex]m = \frac{2000}{15} = \frac{400}{3} \\ = 133.3333[/tex]

We have the final answer as

Hope this helps you

Answer:

0.5

Explanation:

Answer:

Correct answer is polycarbonate not gold

Explanation:

Answer:

y becomes doubled.

Explanation:

If;

       y  = [tex]\frac{k}{x}[/tex]  

what is the state of y when x is halved;

  the given expression is an inverse relationship. When y increases, x is supposed to decrease and vice versa.

 if x is halved; x  = [tex]\frac{x}{2}[/tex]

           [tex]\frac{k}{\frac{x}{2} }[/tex]   = [tex]\frac{2k}{x}[/tex]  

Now compare :

      [tex]\frac{k}{x}[/tex]  :  [tex]\frac{2k}{x}[/tex]

we see that y becomes doubled

Answer:

This question is incomplete

Explanation:

This question is incomplete because the telescope's focal length was not provided. The formula to be used here is

Magnification = telescope's focal length/eyepiece's focal length

The eyepiece's focal length was provided in the question as 0.38 m.

NOTE: Magnification can be described as the power of an instrument (in this case telescope) to enlarge an object. It has no unit and thus the two focal lengths mentioned in the formula above must be in the same unit (preferably meters since one of them is in meters already).

Answer:

The highest order dark fringe is 2

Explanation:

From the question we are told that

   The wavelength is  [tex]\lambda = 575 \ nm = 575 *10^{-9} \ m[/tex]

    The width is of the slit is  [tex]d = 1410 nm = 1410 *10^{-9} \ m[/tex]

Generally the highest order dark fringe  is mathematically represented as

       [tex]m = \frac{w}{\lambda }[/tex]

=>     [tex]m = \frac{ 1410 *10^{-9}}{ 575 *10^{-9} }[/tex]

=>     [tex]m =2[/tex]

Answer:

It does not represent a physical change

Answer:

chemical change as death is irreversible

Answer

The value is  [tex]I = 126000 \ kg \cdot m/s[/tex]

Explanation

From the question we are told that

  The mass of the tank is   [tex]m = 14000 \ kg[/tex]

   The speed is  [tex]u = 9 \ m/s[/tex]

   The duration taken to bring it to a stop is  [tex]\Delta t = 2.5 \ s[/tex]

Generally the impulse that was imparted on the tank is mathematically represented as

         [tex]I = m (u - v )[/tex]

Generally the v is the final velocity of the tank which is  v = 0 m/s , given that it was brought to rest

So

       [tex]I = 14000 (9 - 0 )[/tex]

=>    [tex]I = 126000 \ kg \cdot m/s[/tex]

Impulse is defined as the mass and change of velocity. The magnitude of the impulse was imparted to the tank 126000 Kg m/sec.

The force which acts on the body for a short interval of time is known as the impulsive force. The impulsive force is defined as the product of force and the duration for the force is applied.

It is denoted by I. Its unit is kgm/sec.

m is the mass of the tank =  14000 kg

v is the final speed = 9 m/s

u is the initial speed =0

t is the time interval = 2.5 sec.

The formula for impulse is given as ;

[tex]\rm I=\frac{m(v-u)}{t} \times t \\\\ \rm I=m(v-u) \\\\ \rm I=14000(9-0)\\\\\rm I= 126000 \;kgm/sec[/tex]

Hence the magnitude of the impulse was imparted to the tank 126000 Kg m/sec.

To learn more about the impulse refer to the link;

https://brainly.com/question/904448

Answer:

Usually, zeroes are found to the right of a decimal point in significant numbers if you have something like [tex]7\frac{1}{100000000000000000000000000}[/tex] (exaggerated example of course), which is when you have a number that is very very close to the integer before it, but isn't that integer.

Answer:

c. arrow's push against the bowstring.

Explanation:

Newtons third law of motion describe the relationship between action and reaction forces. Thus when the action force is applied by the bowstring against the arrow, a reaction to this force is supplied by the arrow's push against the bowstring.

If these two forces are not equal and opposite, the arrow would not move as expected. The elastic property of the bowstring propels the arrow at a rate which is due to the potential energy it has gained due to the stretching force.

Answer:

net force

Explanation:

The net force is the vector sum of all the forces acting on an object.

Answer: your feet are the foundation! Even though all your body parts are connected and affect one another, your feet are what we at Foot Levelers call, the "foundation".

Explanation:

Answer:

36111 kg

Explanation:

Given

Force = 65000N

Acceleration = 1.8m/s²

Required

Determine the mass of the elevator

This question will be answered using the following Force formula.

Force = Mass * Acceleration

Substitute values for Force and Acceleration

65000N = Mass * 1.8m/s²

Make Mass the subject

Mass = 65000N/1.8m/s²

Mass = 36111.11 kg

From the list of given options, option E answers the question.

Answer:

A boat can travel 2.30 m/s in still water. (a) If the boat points its prow directly across a stream whose current is. ... (a) What is the velocity (magnitude and direction) of the boat relative to the shore? ... The boat's velocity with respect to the shore, , is the sum of its velocity with respect to the water

Explanation:

Answer:

False

Explanation:

Answer:

false :3

hope this helps

Answer:

The power output is  [tex]P = 360 \ W[/tex]  

Explanation:

From the question we are told that

  The potential difference developed is  [tex]V = 450 V[/tex]

  The current is [tex]I = 0.80 \ A[/tex]

  The duration of the pulse is  [tex]\Delta t = 1.0 ms = 1,0 *10^{-3} \ s[/tex]

Generally the power output of the eel during the pulse is mathematically represented as

      [tex]P = V * I[/tex]

=>    [tex]P = 450 * 0.80[/tex]  

=>    [tex]P = 360 \ W[/tex]  

Answer:

Explanation:

Hydrogen nuclei fuse to form a larger nucleus, and a small amount of mass is converted into energy.

The mass difference between a helium nucleus and four hydrogen nuclei is 0.7%; this mass difference is transformed into energy during the fusion process. Each mole of He42 created as a result of this reaction generates around 3.6 1011 kJ of energy. Thus, option A is correct.

Hydrogen is exhausted during the fusion of hydrogen nuclei, which creates helium and energy. The process's fuel is hydrogen. The star's core condenses and heats up further as the hydrogen is consumed.

For instance, 0.645% of the mass is lost during the fusion of two hydrogen atoms to create helium in the form of electromagnetic radiation or the kinetic energy of an alpha particle. Even those of the lightest element, hydrogen, require a significant amount of energy to get their nuclei to fuse.

Due to this, heavier and heavier elements are encouraged to fuse together, eventually creating all the elements up to iron.

Therefore, Hydrogen nuclei fuse to form a larger nucleus, and a small amount of mass is converted into energy.

Learn more about Hydrogen nuclei here:

https://brainly.com/question/4185579

#SPJ2

Answer:

dont die bro

Explanation:

Answer:

12.25 m/s

Explanation:

The following data were obtained from the question:

Mass (m) = 1500 Kg

Radius (r) = 75 m

Centripetal acceleration (a) = 2 m/s²

Velocity (v) =?

Centripetal acceleration (a) is related to the velocity (v) and radius (r) according to the following formula:

a = v²/r

Thus, we can obtained the velocity of the car by using the above formula as illustrated below:

Radius (r) = 75 m

Centripetal acceleration (a) = 2 m/s²

Velocity (v) =?

a = v²/r

2 = v²/75

Cross multiply

v² = 2 × 75

v² = 150

Take the square root of both side.

v = √150

v = 12.25 m/s

Thus, the speed of the car is 12.25 m/s.

Answer:

The angle which the wheel rotates through in 2 seconds is   [tex]\theta =11 \ radians[/tex]

Explanation:

From the question we are told that

    The constant angular acceleration of the wheel is [tex]\alpha = 4.5 rad/s^2[/tex]  

     The initial angular velocity of the wheel is  [tex]w_1 = 1.0 \ rad/s[/tex]

     The time duration considered is  [tex]t = 2.0 \ s[/tex]

Generally from kinematic equation we have that

      [tex]\theta = w_1 t +\frac{1}{2} \alpha t^2[/tex]

=>   [tex]\theta = 1.0 * 2 +\frac{1}{2} * 4.5 * 2^2[/tex]

=>   [tex]\theta =11 \ radians[/tex]

Answer:

The total thermal energy required  is 8.93 Kcal

Explanation:

Given;

mass of the ice cube, m = 43 g

specific heat capacity of water, Cp = 4.18 J/gc

specific latent heat of fusion of ice, Cf = 334 J/g

First step, determine the heat needed to raise the temperature of the ice from -16.5 °C to 0° C

Q₁ = mCp[0 - (-16.5)]

Q₁ = 43 x 4.18(16.5)

Q₁ = 2965.71 J

Second step, determine the latent heat of fusion of ice at 0°C

Q₂ = mCf

Q₂ = 43 x 334

Q₂ = 14362 J

Third step, determine the quantity of heat required to raise the temperature of the water initially at 0°C to above 11.5 °C of boiling point of water.

The final temperature of the water = 11.5 °C + 100° C = 111.5 °C

Q₃ = mCp Δθ

Q₃ = 43 x 4.18 (111.5 - 0)

Q₃ = 20041 J

Total thermal energy required = Q₁ + Q₂ + Q₃

Total thermal energy required =  2965.71 J + 14362 J +  20041 J

Total thermal energy required = 37,368.71 J

Total thermal energy required = 8.93 Kcal

Answer:

Wavelength

Explanation: