how much total work has been done on the block after it slides down along the ramp a distance of 1.93 m ? total work done on the block: j nancy measures the speed of the wooden block after it has gone the 1.93 m down the ramp. predict what speed she should measure. final speed after sliding from rest: m/s now, steven again places the wooden block back at the top of the ramp, but this time he jokingly gives the block a big push before it slides down the ramp. if the block's initial speed is 2.00 m/s and the block again slides down the ramp 1.93 m , what should nancy measure for the speed of the block this time? final speed after sliding with initial speed 2.00 m/s :

Scientists find out about the internal parts of life science specimen by a method called fixation and the examination of sample under microscope.

Specimen is the whole or a part of an organism, plant or rock collected and preserved as an example of its class and species. It is further used to study the properties of the whole population of the species.

Specimen is collected by withdrawing blood, collecting urine, or swabs from mucosal surfaces. Specimen collection is performed using aseptic techniques to  avoid contamination from bacteria or other bodily fluids.

After the liquid is added to the slide, a coverslip is placed on top and then the specimen becomes ready for examination under the microscope. Another method of preparing specimens for light microscopy is “fixing” that refers to the process of attaching cells to a slide.

There are 5 steps for the preparation of samples:

Fixation is done immediately after the removal of the sample that is to to be observed.

Embedding is done by fixation in a fixative solution.

Sectioning is carried out using microtomy

Staining and  also immunolabeling

Finally mounting.

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The correct word matching of the given waves are:

Water Surface Ripples

Sound Waves

Longitudinal waves are waves that the direction of the vibration of the wave is in the same direction of the travel of the particles of the medium.

Example of longitudinal waves are sound waves.

Transverse waves are waves that the direction of the vibration of the wave is perpendicular to the direction of the travel of the particles of the medium.

Example of transverse waves are water waves.

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Answer:

Kepler's third law:

P^2 = K R^3  the period squared is proportional to the cube of the radius

Ps^2 = K Rs^3

Pe^2 = K Re^3

Ps^2 / Pe^2 = Rs^3 / Re^3        dividing equations

Ps = (Rs / Re)^3/2 * Pe

Ps = (1.4E9 / 1.5E8)3/2 * 1 yr

Ps = 28.5 yrs

(Actual = 10759 da / 365.25 da = 29.5)

When a laser pointer is placed on a platform that rotates at a rate of 1616 revolutions per minute and beam hits a wall 8 m away, producing a dot of light that moves horizontally along the wall, then speed is calculated as, v=  430.88πsec²Ф

A small handheld device with a power source and a laser diode that emits very narrow coherent low-powered laser beam of visible light is a laser pointer.

As angle made with the vertical is given so we can write,

tanФ = x/8

x= 8 tanФ

differentiating both sides with time

v= dx/dt= 8 ω sec^²Ф* d/dt

As we know that;

ω= 2πf

=2π/1616/60

= 53.86π

v= 8*53.86π*sec²Ф

=  430.88πsec²Ф

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Answer:

Kepler refined the Copernican model. Orbits are not circles along which planets move at a constant speed, but ellipses, in the central focus of which is the Sun. The planet moves in an ellipse with a variable speed depending on the distance to the Sun. On this basis, Kepler significantly simplified the Copernican model and formulated the laws of planetary motion in their orbits.

The initial velocity of the cannon ball when it reached a height of 4.75 m is 9.65 m/s.

Velocity can be defined as the rate of change of displacement.

To calculate the initail velocity of the cannon ball, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the initial velocity of the cannon ball is 9.65 m/s.

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The final momentum will be doubled.

What is momentum?

momentum is the result of a particle's mass and velocity. Being a vector quantity, momentum possesses both magnitude as well as direction. According to Isaac Newton's second law of motion, the force acting on a particle is equal to the time rate of change of momentum. Check out Newton's laws of motion. According to Newton's second law, if a particle is subjected to a constant force for a specific amount of time, the result of the force and time (referred to as the impulse) is equivalent to the change in momentum. On the other hand, a particle's momentum represents the length of time needed for a consistent force to bring it to rest.

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The maximum speed with which a 1200- kg car can round a turn of radius 92.0 m on a flat road if the coefficient of static friction between tires and road is 0.40 will be 18.6 m/s.

A force that holds an object at rest is called static friction. The definition of static friction is: The resistance people feel when they attempt to move a stationary object across a surface without actually causing any relative motion between their body and the surface they are moving the object across.

The frictional force acting on the car is given by:

[tex]F_{f} =umg =(0.40) (1200kg)(9.81m/s^{2} )=4709N[/tex]

The force applied to an item in curved motion that is pointed toward the axis of rotation or the centre of curvature is known as a centripetal force. Newtons are used to measure centripetal force. The direction of the centripetal force is always perpendicular to the direction in which the item is moving.

However, the centripetal force, which keeps the car turning in a circle, is also related to the frictional force:

[tex]F_{f} =F_{c} =m \frac{v^{2} }{r}[/tex]

Where v is the fastest the car can travel while still in the turn. We may get the value of v by rearranging the formula and substituting r=88.0 m:

[tex]v=\sqrt{} \frac{Fx_{r} }{m} = \sqrt{}\frac{(4709N)(88..0m)}{1200kg}[/tex]

18.6 m/s

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Answer: energy loss

Explanation: the rest of the energy passes out of the food chain in a number of ways it is used as heat energy it is used for life processes movement faeces and remains are passed to decomposers

The motion when she is running directly east is Δx = 11.7 and Δy = 15.

To determine the slope of a line select two points on the line and calculate the delta y change in y value to determine the change in elevation. Divide the change in x value by the delta x to determine the change in width. The derivative of y is the square of x with respect to y.

So the derivative of something squared with respect to something is multiplied by the derivative of that thing with respect to x. That's exactly the chain rule. Yes, it means exactly the same. y in Newton notation and dy/dx in Leibniz notation. Newton and Leibniz independently invented calculus at about the same time, so in this case, they used different notations to express the same rate of change.

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Light rays bend towards the normal because they slow down when moving from a rarer medium to a denser medium.

The reason behind the refraction of rays of light towards normal is that because slow down when moving from a rarer medium to a denser medium.

If the light rays enter any substance with a higher refractive index (which includes air into glass) then it will slow down. The light always bends towards the ordinary line. If mild travel enters into a substance with a lower refractive index (which includes from water into the air) then it will speed up. Therefore the ray of light always refracted towards the normal.

When the light rays enter from the air into a denser medium like water or glass then the ray of light will refract towards the normal. When light travels from a denser medium into the air, it will refract away from the normal.

So we can conclude that light rays slow down when moving from a rarer medium to a denser medium.

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Answer:Mercury has a greater coefficient of thermal expansion than alcohol. This means a column of mercury will expand and rise more than a column of alcohol for the same temperature change. As a result, you can get finer readings with mercury

Explanation:

a) The block goes 7.4 m up the plane

b) It takes 1.62 seconds to get there

c) The speed at the bottom is -9.1 m/s

The initial speed, v₀ = 9.12 m/s

Angle of inclination, θ = 35°

Note that the summation forces on the block as it goes up the inclined plane is 0. That is, ΣF = 0

mgsinθ + ma = 0

mgsinθ = -ma

a = -gsinθ

The acceleration of the block up the plane is:

a = -9.8 sin 35

a = -5.62 m/s²

a) How far up the plane does it go?

Using the equation v² = v₀² + 2as

At the maximum distance up the plane, v = 0

0² = 9.12² + 2(-5.62)s

0 = 83.17 - 11.24s

11.24s = 83.17

s = 83.17/11.24

s = 7.4 m

The block goes 7.4 m up the plane

b) How long does it take to get there?

Using the equation v = v₀ + at

Since we want to calculate the time taken to reach the maximum distance, the speed at this point is 0. v = 0m/s

Substitute a = -5.62, v₀ = 9.12, and v = 0 into v = v₀ + at

0 = 9.12 + (-5.62)t

5.62t = 9.12

t = 9.12 / 5.62

t = 1.62 seconds

c) What is its speed when it gets back to the bottom?

The total time it takes the block to go up and down the plane = 2(1.62)

The total time it takes the block to go up and down the plane = 3.24 s

To calculate the speed of the block when it gets back to the bottom, use the equation v = v₀ + at

v = 9.12 + (-5.62)(3.24)

v = 9.12 - 18.21

v = -9.1 m/s

The vertical distance through which the motor can raise the safe in 10 s is most nearly 10.2 m

We'll begin by obtainig the energy. This can be obtained as follow:

Power (P) = Energy (E) / time (t)

Cross multiply

Energy = Power × time

Energy = 1000 × 10

Energy = 10000 J

Finally, we shall determine the vertical distance. Details below:

E = mgh

10000 = 100 × 9.8 × h

10000 = 980 × h

Divide both sides by 980

h = 10000 / 980

h = 10.2 m

Thus, the vertical distance is 10.2 m

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The meaning of E = MC² is a energy. It is important because it helps us to calculate the amount of energy required.

Energy is defined as the capacity to exert a force causing the displacement of an item, which is the ability to do work.

There are mainly two types of energy.

Thus, the meaning of E = MC² is a energy. It is important because it helps us to calculate the amount of energy required.

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Answer:

Explanation:

Given:

α = 90°

V₀ = 2.2 m/s

__________

H - ?

H = V₀² / (2*g)   =  2.2² / (2*10) ≈ 0.24 m

The maximum height  obtained by the ball is 24 cm.

The pace at which an object's position changes in relation to a frame of reference and time is what is meant by velocity. Since it is a vector quantity, the definition of velocity requires both magnitude (speed) and direction. Its SI unit is the meter per second (m/s).

Given parameters:

Initial velocity of the tennis ball, u = 2.2 m/s.

And the ball is thrown at  90 degrees from the horizontal .

So, acceleration due to gravity acts on the ball in opposite direction of motion and value of it is 9.8 m/s².

At maximum height H; final velocity (v) is zero.

Using v² = u² - 2as we get,

0² = 2.2² - 2×9.8×H

⇒ H = 2.2²/(2×9.8)

⇒ H = 0.24 m.= 24 cm.

Hence, the maximum height of the ball is 24 cm.

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Because using natural gas is less polluting than petroleum or coal.

Natural Gas is a cleaner fuel than these. Natural gas emits a third less carbon dioxide than coal and emits half less than oil when used for different purposes.
The benefits of using natural gases are:

1. Domestic availability

2. relatively low cost
3. burns efficiently

4. reliable

5. relatively safe

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A wet bar of soap (m=150 grams) starts at rest and slides without friction down a ramp 2.0 N meters long inclined at 7.3°. It take 1.792 second time to reach the bottom.

Friction is a force that resists the relative motion of two contact points. Friction happens when two bodies come into touch with each other.

Given that,

A wet bar soap mass = 150 gm

Length (l) = 2m

angle (θ) = 7.3°

As we know, F = m × g × Sinθ

Acceleration (a) = [tex]\frac{F}{m}[/tex] = g × Sinθ

a = (9.8) × Sin 7.3°

a = 1.2452 m/s²

Next,

S = ut + 1/2 at²

2 = 0 + 1/2 × (1.2452) × (t)²  [ As, u = 0 m/s]

t² = 3.212335

t = 1.792 seconds

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A regular polygon's interior angles add up to 3060° of a 19 sided polygons.

Polygons are defined as a flat shape surrounded by sides, or line segments.

It can be defined as a plane figure whose description is given by a closed polygonal chain made up of a finite number of straight line segments.

It can also be defined as any closed curve made up of a number of connected line segments that do not cross one another.

Sum of interior angle = (p - 2) x 180°

Where p = 19

Sum of interior angle = (19 - 2) x 180°

                                   = 17 x 180°

                                   = 3060°

Thus, a regular polygon's interior angles add up to 3060° of a 19 sided polygons.  

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The correct statement is - Quantity B, because it changes with gravitational strength.

Quantity B is Weight

Quantity A is the Mass - because it remains constant throughout.

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Two students push on a box in the same direction and a third student pushes in the opposite direction. The net force on the box if each push with a force of 50 N is (F)= 50N.

According to the first law of newton's law of motion when a particle is at rest it always be at rest if any external thing affect on it. That external or internal thing that helps the object move that called Force. It can be measured in Newton, Dyne.

To calculate the force we have to study the question carefully. Two  students push on a box in the same direction and a third student pushes in the opposite direction. So according to the question the net force will be,

F = 2f₁-f₂

Here we know,

f₁= The amount of force that two students apply on the same direction. = 50 N.

f₂= The amount of force that students apply on the opposite direction. = 50 N.

We have to calculate the net force= F N.

Now we put the values in above equation, we get,

F = 2f₁-f₂

Or, F= 100-50

Or, F=50N

From the above calculation we can say that,  The net force on the box if each push with a force of 50 N is (F)= 50N.

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A driver travels 135 km east in 1.5 h stops for 45mins for lunch and then resumes driving fir the next 2.0h through a displacement of 215 kn east.  the drivers average velocity is 82.3 km / hr.

given that :

distance travel d1 = 135 km

time taken t1 = 1.5 h

hault time t = 45 mins = 0.75 h

distance travelled d2 = 215 km

time t2 = 2.0 h

Average velocity  =  Total time taken / time

Average velocity = ( 135 km + 215 km ) / ( 1.5 h + 0.75 h + 2.0 h)

                            = 350 km / 4.25

                            = 82.3 km / hr

Thus, A driver travels 135 km east in 1.5 h stops for 45mins for lunch and then resumes driving fir the next 2.0h through a displacement of 215 kn east.  the drivers average velocity is 82.3 km / hr.

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Explanation:

gdbbhwsjanakwgwjwnsbwinwnw

bajwjkwwjehjwkwkwmw

wmiwwijwkwkwmw

........,.................

.....

The magnitude and location of the resultant of the distributed load is given as

[tex]\bar{x}=3.4545 \mathrm{~m} \quad$[/tex]

This is further explained below.

Generally, In the fields of physics and engineering, a resultant force is a single force and related torque that is created by combining a system of forces and torques operating on a rigid body by vector addition. This process yields the single force and associated torque.

[tex]$\sum F_y=0$$F_R=\frac{1}{2} \times(600+1600) \times 6=6600 \mathrm{~N}$\\\\$\sum M_2=0$[/tex]

[tex]$$F_R \times \bar{x}=(600 \times 6) \times\left(\frac{6}{2}\right)+(0.5 \times(1600-600) \times 6) \times\left(\frac{6 \times 2}{3}\right)\\\\$$$6600 \bar{x}=10800+12000$\\\\$\bar{x}=3.4545 \mathrm{~m} \quad$[/tex]

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CQ is attached below

Due to velocity being 0

For distance, acceleration, and time, we may apply a straightforward equation.

d = 0.5*a*t^2

D and T are known.

calculate a

2*d/t^2 = a

thus entering the values

a = 2*47/6.2^2

a = 2.45 m/s^2

This is certain.

Second, if it reaches the inclination 1 second after 6.2 seconds, how long did it take overall?

t = 6.2+1 = 7.2 seconds

Possibly, although it might be asking the distance, that is the response to B).

d = 0.5*2.45*7.2^2

= 63.5 m

Magnitude is simply defined as "distance or quantity." It displays an object's size or motion in either an absolute or relative sense. It is a means of describing the size or breadth of something.

An object is considered to have been accelerated if its velocity changes. An object's velocity may alter depending on whether it is going more quickly, more slowly, or in a different direction.

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Answer:

so people cant hack into a device (phone,tablet,computer) & find out where you are & kill you.

Explanation: very useful if you have any devices

A. Its kinetic energy increases occurs as the potential energy of an object decreases.

The mass and height of an item affect how much gravitational potential energy it has. More gravitational potential energy is held by an item the heavier it is and the higher it is above the surface of the earth. As weight and height grow, gravitational potential energy rises.

The mass of the item has a significant role in determining the gravitational potential energy. The mass and potential energy are intimately related. As a result, an item with higher mass has more potential energy.

A falling object loses potential energy while gaining kinetic energy. The difference between the increase in kinetic energy and the reduction in potential energy is exact. Work is a further crucial idea.

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Answer: 24

Explanation: because my brain said..

An apparent brighter blue star.

The hue of light emitted by a star depends on its surface temperature. Yellow stars are hotter than red stars, and yellow stars are hotter yet than blue stars.

The difference between a star's magnitude in one filter and its magnitude in another filter is that star's color index. Color indices can be calculated using any filter, but some of the more used ones are B-V and V-R. Red wavelengths are B, green wavelengths are V, and blue wavelengths are B. The star is bluer (and hotter) if B - V is small than if B - V is high since magnitudes decline with increasing brightness.

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The wave length in picometers for above problem was 32pm

What is wavelength?

Have you ever given any thought to why it is possible for humans to perceive colour? The explanation is that different light wavelengths of electromagnetic radiation are what give colours their distinct appearance. The visible portion of the electromagnetic spectrum is also known as visible light. These colours also come in a variety of wavelengths. Learn more about wavelength and visible light's wavelength in this article. The distance between the two crests or troughs of the light wave is known as the wavelength of light. Using the Greek letter lambda (λ), it is identified. As a result, wavelength refers to the separation between one wave's crest or trough and the following wave.

v=c/λ

v: 9.3 × 10^18 Hz c: 3.00*10^8 λ:

9.3 × 10^18 Hz

λ = 3.0010^8 m/s /9.3× 10^18

The calculated wavelength is in unit of meter. use the relationship between meter and nanometer to convert to the correct units.

= 32 nm

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