An apple is released from rest 500 m above the ground. Due to the combined forces of air resistance and gravity, it has a speed of 40 m s when it reaches the ground. What percentage of the initial mechanical energy of the apple-Earth system was dissipated due to air resistance

Answer:

D=mass /volume

=60/0.002

=30000

Answer:

See below

Explanation:

So the magnets poles are opposed and the magnets REPEL each other

The value of the dependent variable is based upon changes in the values of the independent variable.

The term independent variable has to do with the variable that is being intentionally manipulated in an experiment. The dependent variable is the variable that changes in value as the  independent variable is manipulated.

Now, the question is unclear however, we do know that in an experiment, the value of the dependent variable is based upon changes in the values of the independent variable.

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Answer:

The independent variable in Part I, the one that is intentionally manipulated, is the

✔ type of material

.

The independent variable in Part II, the one that is intentionally manipulated, is the

✔ charge of an object

.

The independent variable in Part III, the one that is intentionally manipulated, is the

✔ movement of a magnet

.

The independent variable in Part IV, the one that is intentionally manipulated, is the

✔ presence of an electric field

.

Explanation:

Answer:

Moment of inertia at distance L / 2    from center

I1 = M (L / 2)^2 = M L^2 / 4

I2 = M (L / 6)^2 = M L^2 / 36      at a distance of L / 6

I (1/2 rod) = I1 + I2 = M L^2 (1/4 + 1/36) = M L^2 (9 + 1)/ 36 = 5/ 18 M L^2

I for entire rod = 2 I (1/2 rod) = 5 / 9 M L^2

The mass of an alpha particle greater than the mass of an electron. Hence option A is correct.

The alpha particle is a positively charged particle that is similar to the nucleus of the helium-4 atom and is spontaneously released by some radioactive substances. It is made up of two protons and two neutrons bonded together and has a mass of four units and a positive charge of two. Ernest Rutherford discovered and named alpha particles (1899), which he and colleagues employed in studies to examine the structure of atoms in thin metallic foils. This investigation produced in the original notion of the atom (1909-11) as a miniature planetary system with negatively charged particles (electrons) circling a positively charged nucleus. Later, in the first artificially created nuclear transmutation (1925), Patrick Blackett blasted nitrogen with alpha particles, converting it to oxygen.

Alpha particle is heavier than the electron cause alpha particle has 2 neutron and two protons which makes it heavier.

Hence option A is correct.

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Answer: Mass and velocity

K = 0.5*m*v^2

Explanation:

Hope it helps!

Answer:

mass and velocity

Explanation:

Kinetic Energy = 1/2 * m * v^2          m= mass   v = velocity

Answer:

The lack of sufficient water resources, including a lack of access t safe water supplies, to meet water needs within a region.

Explanation:

Answer:

No answer

Explanation:

Because there is no question

Answer:

C. Biased in favor of pesticides.

Explanation:

Answer:

As Per Provided Information

Moving body has 2m/s² acceleration

Time taken by body is 4 second

We are asked to find the 'change in velocity' ( ∆V) by the body.

Formula Used here

[tex] \boxed{\bf{\Delta \: V \: = acceleration \: \times time \:}}[/tex]

Substituting the given value

[tex] \sf\longrightarrow\Delta\:V \: = 2 \times 4 \\ \\ \\ \sf\longrightarrow\Delta\:V \: =8m {s}^{ - 1} [/tex]

Therefore,

Answer:

I love ur pfp! Ok here's a rough image of how a typical energy diagram works.  You give a little energy (A) and you get the potential that was in there all along.  Kinda like pushing a big rock off a cliff.  You do a little work then get a lot of energy out as the PE turns into other forms.  In a match it's heat and light

Is this correct?

Explanation:

Answer:

6.32 m/s

Explanation:

KE = 1/2 m v^2

sqrt (2 * KE /m) = v = 6.32 m/s    

Question :-

Answer :-

Explanation :-

As per the provided information in the given question, we have been given that the Frequency of the Sound Wave is 250 Hertz. Its Wavelenght is given as 1.5 Meter. And, we have been asked to calculate the Speed of the Wave.

For calculating the Speed , we will use the Formula :-

[tex] \bigstar \: \: \boxed {\sf { \: Speed \: = \: Frequency \: \times \: Wavelenght \: }} [/tex]

Therefore , by Substituting the given values in the above Formula :-

[tex] \Longrightarrow \: \: \sf { \: Speed \: = \: Frequency \: \times \: Wavelenght }[/tex]

[tex] \Longrightarrow \: \: \sf { \: Speed \: = \: 250 \: \times \: 1.5 }[/tex]

[tex] \Longrightarrow \: \: \bf { \: Speed \: = \: 375 }[/tex]

Hence :-

[tex] \underline {\rule {180pt}{4pt}} [/tex]

Speed = Frequency Wavelenght

Speed

Speed

Hence :

Speed of the Wave = 375 m/s.

=

250 x 1.5

375

The angle between the two vectors of the same magnitude would be 120 degrees to have the resultants the same.

answer: 120 degrees

Answer:

remove the danger that lead to injury

Explanation:

The best way is

Answer:

A

Explanation:

Answer:

see below

Explanation:

Gases flying out at high velocity out the back  

  rocket flying forward

Answer:
1.)the surface of the table is set into vibration
2.)the initial vibration was larger
3.)The entire table vibrates

Explanation:hope this helps :3 have a good day xlXCherryColaXlx..(pls mark me brainliest)

Answer:

9N

Explanation:

F = ma

F = 150kg × (15 - 0)m/s / 250s

F = 9N

Answer:

In order to measure the amount of solution added in or drained out, the burette must be observed at eye level straight to the bottom of the meniscus. The liquid in the burette should be completely free of bubbles to ensure accurate measurements.

Answer:

Explanation:

What is the value of a in the function's equation?

A. -2

B. -3

C. 3

D. 2

ANSWER: c.

Answer:

31ohms

Explanation:

in a series u add all the ohms together

At the top of the arc in a swinging pendulum the value of the kinetic energy is zero.

This is defined as the energy possessed by a body virtue of its motion or movement.

When a pendulum swings, it possesses kinetic energy which is usually zero at the top of the arc after which it possesses potential energy as a result of the resting position.

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Answer:

The new planet has more gravity

Explanation:

gravity force =  G m1 m2 / r^2

   decresing r  or increasing the planet mass will increase the force

Answer:

At the same speed as before

Explanation:

Speed is dependent on the tension in the string, and since the tension isn't changing, the speed of the waves will also not change.

Answer:

..

Explanation:

Coordinate adjectives are adjectives that describe the same noun equally. They should be separated with commas. In this sentence, both red and round are describing the ball. The correct answer is, "The red, round ball is Adley's favorite toy to play with."

Explanation:

the weight of an object is its force exerted by gravity.

on earth we take gravitational acceleration to be 9.8 m/s^2

so the weight of an object on earth is given by F = mg

hence,

F = 90 × 9.8

F = 882 Newtons (weight on earth)

gravitational acceleration on the moon is equal to 9.8/6. so, we can just use the same formula to find the weight on the moon.

F = 90 × 9.8/6

F = 147 Newtons (weight on the moon)

make sure to ask if you need any further guidance.

It can be assumed that the spring constant will be same.Because the weight applied and the extension is same

The force required to extend or compress a spring by some distance scales linearly with respect to that distance is known as the spring force. Its formula is

F = kx

Two springs are attached to two hooks. When equal weights are suspended from each spring, both stretch the same amount.

Extensions will be greater in spring B than in spring A.Remember that the force constant represents the spring's stiffness,

Hence It can be assumed that the spring constant will be same.Because the weight applied and the extension is same.

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Answer:

Explanation:

Kinetic energy formula

Given

Solving

m=0.038kg

v=80m/s

Kinetic energy