_Why do the *second lever system* is the least abundant one in our body inspite of it's great *mechanical advantage*?

The speed of the object after 1 second and 2 seconds is 9.8 m/s and 19.6 m/s respectively.

The equation of motion to be used for calculation of velocity is -

v = u + at, where v and u are final and initial velocity, a is acceleration and t refers to time. Keep the value for each case to find the final velocity. The value of a will be acceleration due to gravity which is 9.8 m/s².

After 1 second

v = 0 + 9.8 × 1

v = 9.8 m/s.

After 2 seconds

v = 0 + 9.8 × 2

v = 19.6 m/s.

Hence, the required velocities are 9.8 and 19.6 m/s.

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Answer:

2.19 x 10⁸ m/s

Explanation:

The index of refraction n and the speed of light in ethanol v are related by the following equation

Where c is the speed of light in a vacuum. Replacing n = 1.37 and c = 3 x 10⁸ m/s, we get:

Therefore, the speed of light in ethanol is 2.19 x 10⁸ m/s

Answer:

The solution of the given query is explained below in the explanation portion.

Explanation:

Given value is:

Work,

⇒  \(W=4.30\times 10^3 \ J\)

(a)

The change in the internal energy will be:

⇒  \(\Delta V=\frac{3}{2}nR(\Delta T)\)

Throughout the isothermal procedure, The temperature will be constant "ΔT = 0".

then,

⇒  \(\Delta V = \frac{3}{2}nR(0)\)

⇒  \(\Delta V = 0 \ J\)

(b)

As we know,

⇒  \(\Delta V = Q-W\)

On substituting the value, we get

⇒      \(0=Q-W\)

On adding W both sides, we get

⇒    \(W=Q-W+W\)

⇒    \(W=Q\)

On substituting the given value of "W", we get

⇒     \(Q=4.30\times 10^3 \ J\)    

Answer:

see below

Explanation:

Reultant force via Pythag Theorem

R = sqrt (3^2 + 4^2) = 5 N

F = ma

5 = 20 a

a = 5/20  m/s^2

The maximum possible efficiency of an engine operating between the given two temperatures is 10.38%.

Maximum efficiency that is obtained when the heat engine is operating between two temperatures is called Carnot Efficiency.

The efficiency of heat engines generally increases with the operating temperature. Advanced structural materials that helps engines to operate at higher temperatures is an active area of research.

The efficiency of Carnot engine = 1

No engine has 100 % efficiency as per the Kelvin Planck statement. Sink temperature is always  less than the source temperature, therefore  of Carnot cycle efficiency becomes less than 100 %.

Given T1 = 35°C , T2= 3°C

Efficiency =( (T1 - T2)/T1) × 100

T1= 35+273 = 308 K

T2 = 3 +273= 276 K

Efficiency = ( 308 - 276)/308×100

=( 32×100)/308

Efficiency = 10.38 %

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Answer:

because it helps to neutralize acid in our body.

Answer:

15.61 m/s^2

Explanation:

From 3 rd equation of motion

s=ut+1/2at^2

given s = 30

u= 0 ( as body was at rest)

t= 1.96s

30=0*1.96+1/2a(1.96)^2

30=0+1/2a(1.96)^2

a=2*30÷(1.96)^2

a= 15.61 m/s^2 (approx)

The speed of the airplane relative to the ground is the vector sum of the speed of the airplane relative to the air and the speed of the wind relative to the ground, and the direction is the angle of the resultant vector with respect to the ground.

In this case, we need to break down the velocities into their horizontal and vertical components. The horizontal component of the airplane's velocity is given by V_airplane * cos(290°), and the vertical component is V_airplane * sin(290°).

Similarly, the horizontal and vertical components of the wind's velocity are V_wind * cos(45°) and V_wind * sin(45°), respectively.

To find the resultant velocity, we add the horizontal and vertical components of the airplane's velocity to the horizontal and vertical components of the wind's velocity.

The magnitude of the resultant velocity is calculated using the Pythagorean theorem, and the direction is determined using trigonometric functions.

Therefore, to find the speed and direction of the airplane relative to the ground, we need to calculate the resultant velocity vector using the given information and trigonometric calculations.

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Answer:35 Celsius

Explanation:in this situation the difference in temperature is larger resulting in faster rate of transfer

Explanation:

formula is given by

h/mv

where h is 6.626 × 10 ^-34

and c = 3 × 10^8

m = mass

by plugging in the values in the formula, the de Brogile wavelength is equal to 7.6424 × 10^(-15)

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Answer:

10000 Bq / 625 Pq = 16

Radioactivity has decreased by a factor of 16

2^4 = 16

So the sample has gone thru 4 half-lives

24 da / 4 = 6 da

6 da is the half-life

Answer:

Well first for criteria think what would the rover need in order to sustain itself on Venus. And for constraints think of anything that could possibly affect the rover( ex: gasses, active volcanoes)

Explanation:

Criteria: Make the rover self sustainable, and allow the rover to have a mission on Venus( ex: collect rock samples)

Constraints, as I mentioned above gasses, and active volcanoes.

I hope this helps! :)

Push or pull are the word medium is used to indicate a substance through which a force acts other meanings of medium that you use or hear in everyday life.

A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

The gravitational constant, denoted by the capital letter G, is an empirical physical constant involved in the calculation of gravitational effects in Sir Isaac Newton's law of universal gravitation and in Albert Einstein's theory of general relativity.

f = Gmm/r²

Push or pull are the word medium is used to indicate a substance through which a force acts other meanings of medium that you use or hear in everyday life.

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Assuming the laser beam is perfectly vertically polarized, the polarizing filter will only allow light polarized in the same direction as its axis to pass through. Therefore, the laser beam's power will be reduced by a factor of $\cos^2 \theta$, where $\theta$ is the angle between the filter's axis and the vertical.

Given that the filter's axis is 34 degrees from horizontal, it is also 56 degrees from vertical. Thus, $\theta = 56^\circ$.

The power of the laser beam as it emerges from the filter is:

$P_{out} = P_{in} \cos^2 \theta$

where $P_{in}$ is the initial power of the laser beam.

Substituting the given values, we get:

$P_{out} = (210,\text{mW}) \cos^2 56^\circ \approx 86.5,\text{mW}$

Therefore, the power of the laser beam as it emerges from the filter is approximately 86.5 mW.

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Frequency and wavelength are inversely proportional to each other. The wave with the greatest frequency has the shortest wavelength. Twice the frequency means one-half the wavelength. For this reason, the wavelength ratio is the inverse of the frequency ratio.

Answer: B

Explanation: it is perpendicular to a surface

Answer:

it is perpendicular to a surface

Explanation:

Answer:

I think the answer is D.)

Explanation:

If it means something needs to melt into liquid i would have gone with B.) or C.) but since it doesn't specifiy. I thought D.) since all you have to do is heat it and it melts or boils.

The statement “Increased levels of endorphins are released into the brain, boosting a person's mood” best explains how the regular form of exercise is beneficial to the brain.

Generally, when individuals exercise regularly, their bodies tend to release chemicals named endorphins. Some of the significant characteristics of endorphins are listed as follows:

Thus, we can conclude that regular exercise can boost a person’s mood by increasing the endorphin levels that are released into the brain. Hence, option A is the correct answer.

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Answer:B

Explanation:

.03 of an hr is 2 mins and if it takes 2 mins to drive 4 miles enter it in pace calulator you are going 120mph so the closest to 120 is 133mph

The kid is breaking the speed limit of 45 miles/hr since he is going at 133.3 miles/hr.

Speed is the ratio of distance travelled to time taken. It is given by:

Speed = distance / time

Since the distance to the mall is 4 miles, the time taken is 0.03 hours, hence the speed is:

Speed = distance / time

Speed = 4 miles / 0.03 hours

Speed = 133.3 miles/hr

Hence the kid is breaking the speed limit of 45 miles/hr since he is going at 133.3 miles/hr.

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Answer:

33 m/s

Explanation:

Answer:

\(30 \div 33750 = 0.008888\)

Answer:

  4. none of the above

Explanation:

A "15 °C calorie" (with a lower-case 'c') is defined as the amount of energy required to raise 1 gram of water from 14.5 °C to 15.5 °C at standard atmospheric pressure. That definition is one of at least 7 different definitions of the "gram calorie".

A Calorie (with an upper-case 'C') is 1000 calories. So the choice "1 Calorie" is attractive, but incorrect. It is 1000 times the amount of heat described.

none of the Joule or Calorie choices is correct

The slopes that are formed by angular, ragged stones are more stable because they have the largest angle of repose.

1. In physics, the angle formed by the plane de contact between both bodies and the horizontal so when upper body is just about to slide: the angle whose tangent represents the frictional resistance of the two bodies.

One aspect of inter particulate friction, or the resistance to particle movement, is angle of repose. The USP describes it as the consistent, three-dimensional angle (relative to the horizontal base) acquired by a cone-shaped pile of material created using any of a number of different techniques.

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To solve this problem, we can use the continuity equation, which states that the mass flow rate (the rate at which mass flows through a point in a system) must be constant throughout the system. In other words, the mass flow rate at point 1 must equal the mass flow rate at point 2.

The mass flow rate is equal to the density of the fluid times the flow rate (also known as the volume flow rate). The flow rate is equal to the cross-sectional area of the tube times the velocity of the fluid. Therefore, we can write the continuity equation as:

density \(${ }^*\left(\right.$\) cross-sectional area \(${ }^*$\) velocity )=constant

We can rearrange this equation to solve for the velocity at each point:

velocity = constant  (density* cross-sectional area)

At point 1 , the velocity can be calculated as follows:

\($\mathrm{V} 1=$\)constant\($/\left(\right.$\) density\($\left.{ }^* \mathrm{~A} 1\right\))= constant \($/\left(\right.$\) density \($\left.* 1.00 \mathrm{~cm}^{\wedge} 2\right)$\)

At point 2, the velocity can be calculated as follows:

V 2 = constant\($/($ density $* A 2)\)= constant \($/\left(\right.$\) density \($\left.* 4.00 \mathrm{~cm}^{\wedge} 2\right)$\)

We can find the value of the constant by using the pressure difference between the two points and the ideal gas law:

\($$\mathrm{P} 1-\mathrm{P} 2=\left(\text { density }^* \text { velocity }^{\wedge} 2\right) / 2$$\)

Substituting the known values, we have:

\($$9.45 \mathrm{kPa}=\left(\text { density }{ }^* \mathrm{~V} 1^{\wedge} 2\right) / 2$$\)

Note that the density of glycerin is not given, so we cannot calculate the exact values of V1 and V2. However, we can still determine the relationships between the velocities at the two points. Specifically, we can see that the velocity at point 2 is half the velocity at point 1 .

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We will have that the picture that shows the highest average kinetic energy is image B.

Answer:

Explanation:

1.)66.36

2.)11.4

3.)0.8104

4.)4158.315

i got some of them and try the rest good luck