What is fluid friction

The speed of the light is found to be 1.48 *  10^8 m/s.

We know that the moon is a non luminous body in the solar system. This means that the moon does not produce any light as we can see. The light that appears to come from the moon is light that has been reflected from the surface of the moon.

Now we know that;

Distance that have been covered from the moon =  3.85 × 10^8 m

Time taken to move from the moon = 2.60 s

Speed of the light = Distance/ time

=   3.85 × 10^8 m/2.60 s

= 1.48 *  10^8 m/s

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Answer:Lack of experience.

Explanation:

Research from the CDC points to a few key reasons teen drivers are likely to be involved in car accidents: Lack of experience. Teen drivers have triple the fatal crash risk of older drivers, in part because they do not have the skills to recognize and avoid road hazards.

The coefficient of kinetic friction between the box and the floor is 0.87.

The coefficient of kinetic friction between the box and the floor is calculated by applying the formula for net force on the box.

F(net) = ma

where;

at a constant velocity, the acceleration of the box, a = 0

F(net) = 0

The net force is obtained from the applied force and force of friction;

Fcosθ - μmg = 0

where;

μmg  = Fcosθ

μ = Fcosθ / mg

μ = (485 x cos55) / (32.6 x 9.8)

μ = 0.87

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What is Electronegativity?

However, the bond becomes polar enough to be regarded as more ionic than covalent when there is a significant enough difference in the electronegativities of the bound atoms.

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The correct answer is as per graph displacement and acceleration is initially 0 m & 0 m/s^2, at middle 0 m & Infinity m/s^2 and finally 320 m & 5 m/s^2 respectively.

What is relation between velocity & acceleration with respect to displacement and time?

Velocity = Displacement / Time

Acceleration = Velocity / Time

Given data:

V1 = 40 m /s, t = 0 (Initial Velocity)

Displacement = 40 x 0 = 0 m,

Acceleration = 40 / 0 = 0 m/s^2

V2 = 0 m/s, t = 4 sec

Displacement = 0 x 4 = 0 m,

Acceleration = 0 / 4 = Infinity m/s^2

V3 = -40 m/s, t = 8 sec

Displacement = -40 x 8 = 320 m (in opposite direction)

Acceleration = -40 / 8 = 5 m/s^2

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The work done on the object as it moves from a distance of 0.0m to 2.0m is 40 J.

Work done is defined as the product of the force applied and the distance moved by the force.

The unit of work done is Joules.

Based on the graph:

When the object moves from 0.0 m to 2.0 m

The force applied between 0.0 m to 2.0 m is 20 N

Hence, the work done will be:

Work done = 20 * 2.0

Work done = 40 J

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Answer:

Like everything in life, organisation is important. One major reason is the systematic and structural building of the subject into different levels so it becomes easier to study each separately as opposed to the whole in one go.

Also, it shows how each level integrates into the next in a clear and simpler way.

when we study about cells, as the basic building block of living things, we can focus on the cell as a unit and its structures and the multitude of processes that take place within its membrane and without, we learn how living organisms whether unicellular or multicellular survive. The field of microbiology is well suited to that level.

The next level of tissues, illustrates how similar cells interact and form a group.

Going into organs, different tissues have to be compatible so they can perform specific function(s). This surely is important to illustrate the performance of organs as part of systems.

A whole living organism is a collection of all those systems working together and coordinating on a constant and continuous basis to make sure that the biological machinery is fully functional, free of ailments and diseases.

A healthy organism needs to make sure that all levels are in synchrony to be able to survive and pass on its genetic information to the next offspring to ensure the survival of the species

The height and range of the projectile are 500 meters.

Solution:

The initial vertical speed is 100m/s (200Sin30) so if g is 10m/s per second it will take 10 seconds to rise and 10 seconds to fall → 20 seconds fire time.

Horizontal velocity is 200Cos30 or 173 m/s

Range? 3460 meters.

Height? The average vertical speed is 50m/s (from 100 to zero) and it rises for 10 seconds. 500 meters.

This equation defines the maximum projectile height from the launch position and depends only on the vertical component of the initial velocity. The maximum horizontal distance a projectile travels is called range. The range is the difference between the lowest and highest values. Indicates that the maximum horizontal distance is four times the maximum height the projectile will reach.

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The velocity of the car will be 22.98 m/s with a momentum of 50000 kgms and has a mass of 2175 kg.

Momentum is the term used to describe the state of motion of an item whose mass is non-zero. Thus, momentum has an impact on all moving objects. p=mv, where m is an object's mass and v is its rate of motion, is the formula for momentum. Due to its classification as a part of velocity, momentum is a vector. This implies that momentum has a sizeable magnitude and a clear direction, with the latter shown by a vector or an arrow. A certain mass and speed are two examples of when an object has momentum. Momentum always remains constant as a result. Momentum conservation law states as such.

The formula of momentum will be:

p = mv

where, p = momentum = 50000 kgms

            m = mass =  2175 kg.

            v = velocity = ?

substitute the given values,

momentum = mass x velocity

50000 =2175 x v

v = 50000 / 2175

=22.98 m/s

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An airplane is flying with a force of 800 N. It experiences a force of air resistance of 40 N and a wind force of 60 N, both acting in the opposite direction that the plane is traveling. The net force on the airplane will be 700 N

Force with which airplane is flying ( F1 ) = 800 N

opposite to which two forces are acting

air resistance = 40 N

wind force = 60 N

net force = F1 - 40 - 60 = 800 - 100 = 700 N

The net force on the airplane will be 700 N

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A heavy truck would have larger momentum.

Because a body's mass and velocity affect its momentum. Additionally, a large truck would have higher momentum because its mass is greater than that of a light truck.

As momentum depends on both velocity and the direction of the body's motion, it is quantified by "mass velocity". Since velocity is a vector and mass is a scalar, momentum is a vector quantity.

The highest velocity change occurs in instance B, and momentum change relies on velocity change (as stated above). Keep in mind that each of the aforementioned collisions involved a ball rebounding off a wall. Observe that the acceleration, momentum change, and impulse increase with increasing rebound effect.

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a) The brick was in the air for 7.84 sec.

b) The maximum horizontal distance traveled by the brick is 9.1 m.

When a particle is thrown obliquely near the surface of the Earth, it travels in a curved path with constant acceleration towards the center of the Earth (assuming the particle stays near the surface). Such a particle trajectory is said to be a projectile, and the motion is called projectile motion.

Time of flight (T) = 2usinθg

Where, u = initial velocity (15 m/s)

θ = 25°

g = 9.8 m/s²

T = 2 × 0.4 × 9.8

T = 7.84 s

Horizontal distance or range (R):

R = [tex]\frac{u^{2}sin2\theta }{2g}[/tex]

R = 9.1 m

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The acceleration due to gravity on the asteroid, given that it has a mass of 1.00×10⁴ kg and a radius of 20.0 m is 1.67×10¯⁹ m/s²

Acceleration due to gravity of planets can be obtained by using the following formula:

g = GM / R²

Where

Now, we shall apply the above formula, to determine the acceleration due to gravity on the asteroid. Details below                                                                                  

g = GM / R²

g = (6.67×10¯¹¹ × 1.00×10⁴) / (20)²

g = 6.67×10¯⁷ / 400

g = 1.67×10¯⁹ m/s²

Thus, we can conclude that the acceleration due to gravity on the asteroid is 1.67×10¯⁹ m/s²

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The maximum height traveled by the ball of mass 45.6 grams is 0.593 m.

Height is the vertical distance between two points.

To calculate the maximum height the golf ball will travel to after the bounce, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these value into equation 1

Hence, the maximum height traveled by the ball is 0.593 m.

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He was solely consuming high-fat foods until recently, when he began consuming nutritious foods.

Briefing:

Instead of helping you lose weight, hopping from one diet fad to another can make you put on weight. Your daily calorie intake can fluctuate significantly, which can cause your metabolism to slow down. To adjust to new food, your metabolism needs about three weeks.

Obesity is typically brought on by excessive eating and insufficient exercise. A large portion of the excess energy will be stored by the body as fat if you consume large amounts of energy, especially fat and sugars, without expelling it through exercise and physical activity.

Even if the food is good for you, the calories can still add up and result in a weight loss plateau or even weight gain.

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Answer:

An object of mass 20 kg is moving with a velocity of 10 m / s. Its momentum will be: A. 2000 kg · m / s, B. 200 kg · m / s, C. 2 kg · m / s, D. 20 kg · m / s An object of mass 20 kg is moving with a velocity of 10 m / s. Its momentum will be: A. 2000 kg · m / s, B. 200 kg · m / s, C. 2 kg · m / s, and D. 20 kg · m / s.

Explanation:

The correct option is (B) 200 kg.m/s

Given,

Mass of the body = 20 kg

Velocity of the body = 10 m/s

We know,

The momentum of a body is given by the product of the mass of the body and velocity.

So,

M

o

m

e

n

t

u

m

P

=

M

a

s

s

m

×

V

e

l

o

c

i

t

y

v

Putting all the values

P

=

20

×

10

=

200

kg.m/s

Hence the momentum of the body is 200 kg.m/s

The momentum of the truck is 40,000 kg m/s

Given mass of a truck = 4000 kg

mass when expressed in grams will be

mass of a truck = 4 grams

However since the standard unit of momentum is kg m/s we will not convert the units

And the velocity which is given is 10 m/s

And momentum can be defined as the product of mass and velocity

thus momentum = mass × velocity

momentum = 4000 × 10

momentum = 40000 kg m/s

Thus the momentum of the truck is 40,000 kg m/s

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The mass of space will same as 3900 kg on earth and mars. Because mass does not change in space.

If an area rover has a mass of 3900 kg in the world, the mass on Mars when it lands could be 3900kg. The mass of an area rover is 3900 kg.

The mass of the area rover on Mars may also be identical 3900 kg due to the fact the mars is an identical amount it won't trade in line with area or time, it stays consistent. wherein as weight might be modified. The mass of the item is usually steady, anywhere it's far on earth or Moon or any other planet.

Mars is bigger than Mercury, however, it is not as dense because a smaller planet. if you weighed sixty-eight kg on earth you then might weigh 25.6 kg on Mars. due to the fact, Pluto was demoted to a dwarf planet, Mars became the planet wherein you will weigh the least. Jupiter is the biggest planet in our sun gadget with the most mass.

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Answer:

A. I = 12/(10 + 20mH) = 0.545 A

B. Time constant = 20mH

C. I = 0.545 * (1 - e^(-10/20mH)) = 0.49 A

D. V = 12 - IR = 12 - (0.545 * 10) = 10.91 V

E. di/dt = 12/20mH = 0.6 A/s

F. It will take 3 time constants for the current to reach 99.4% of its maximum value.

Explanation:

The speed the second ball must be thrown so that it reaches the same height as the one thrown vertically is 40.84 m/s.

The maximum height travelled by the first ball is calculated by applying the following kinematic equation as shown below;

h = vt + ¹/₂gt²

where;

h = 0 + ¹/₂gt²

h = ¹/₂gt²

h = ¹/₂(9.8)(2.39²)

h = 28 m

The speed the second ball must be thrown so that it reaches the same height as the one thrown vertically is calculated as follows;

h = (u²sin²θ)/2g

u²sin²θ = 2gh

u² = (2gh) / (sin²θ)

u² = (2 x 9.8 x 28) / (sin 35)²

u² = 1,668.1

u = √1,668.1

u = 40.84 m/s

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The period of the this given oscilloscope trace from an AC supply is calculated as 1 * 10⁻³ seconds.

Period of a wave is the inverse of the frequency so the formula for wave period is,  T = 1 / f , where T is period which is the time taken for one cycle to complete, and F is frequency.

To obtain period from frequency, first you have to convert frequency from Hertz to 1/s and then divide 1 by the frequency. The period of a wave is measured in seconds (s), while the frequency is measured in Hertz (Hz).

Given each horizontal division is 2ms

the time= 10ms

Period = 1/T

= 1/10ms

= 0.1ms  

Period = 1 * 10⁻³ seconds

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The mass and volume of a body are given, then the percentage error of the density of the body will be equal to 5%.

Mass per unit volume of a solid substance, density. Density is defined as d = M/V, where M stands for gravity, and V for volume.

The measure of density that will be most frequently used is grams per cubic centimeter. For instance, the density of Earth is 5.51 grams per cubic centimeter, whereas the density of water is 1 gram per cubic centimeter. Kg per cubic meter is another method for determining density.

Mass, M = 100±2% kg = 100±0.02 kg

Volume, V = 100±3% m³ = 100±0.03 m³

P =M/V

Use the error analysis method,

log P = log M - log V

Differentiate on both sides of the above equation,

dP/P = dM/M+dV/V

Check for maximum possible error:

dP/P = 0.02/100+0.03/100 = 0.05/100

dP/P = 5%.

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The mass of soccer ball is 5 kg. A ball got a force (50 N) which caused change in momentum for 25 second.

The value of the change in momentum can be described below :

The change in momentum is called as Impuls.

The formula of Impuls --> I = F × t

I = Impuls, F = Force (N), t = time (s)

I = F × t

I = 50 × 25 = 1250 Ns

So, the change in momentum of 5 kg ball is 1250 Ns.

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Answer:

By understanding exactly what the word resistance means in this context. It is a simple constant of proportionality.

sample of a conductor, there was a simple linear relationship between current and voltage. If you doubled the voltage the current would double. It is possible to write

R=V/I

Explanation:

Water bodies' quantity and flow both decrease.

When a river is redirected away from major water bodies, like rivers, lakes, etc. the volume of water flowing through the rivers and lakes decreases, and there is a reduction in the flow of water as well. This is because the water flows to the diverted sides of the river. We can say that this river's diversion has a detrimental impact on other communities because the areas it flows through may also suffer from a lack of water for either daily necessities or crop production.

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Answer:

When different insulating materials rub against each other, they can become electrically charged. When the cloth is rubbed against the rod, the friction causes electrons to gain energy, transferring themselves to the rod and therefore becoming posively charged. The rod is now negatively charged as it has gained electrons.

Suppose a hockey puck slides down a frictionless ramp with an acceleration of 4.10 m/s2 . The angle that the ramp make with respect to the horizontal will be  24.71°

F net = 0

mg sin(theta ) = mass * acceleration

sin(theta) = a /g

theta =  [tex]sin^{-1}[/tex] ( a / g)

        =  [tex]sin^{-1}[/tex] ( 4.10 / 9.8 )

        =  [tex]sin^{-1}[/tex] ( 0.418 )

        = 24.71°

The angle that the ramp make with respect to the horizontal will be  24.71°

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The magnitude of the average acceleration of the cart: a(CD) > a(AB) > a(DE) > a(BC). Therefore, option (d) is correct.

Acceleration can be defined as the rate of change of velocity and is denoted by ‘a. It is measured in the units of m/s². For a particular interval, the average acceleration is the change in velocity for that specific time interval.

Average acceleration is calculated by the following formula,

Average acceleration = Δv/Δt

Where Δ v is the change in velocity and Δt is the total time in the velocity is changing.

For the curve AB:

Average acceleration = [tex]a =\frac{v_f-v_i}{t_f-t_i}[/tex]

a = (8 -0)/(0.6 - 0) = 13.3 m/s²

For the curve BC:

Average acceleration = [tex]a =\frac{v_f-v_i}{t_f-t_i}[/tex]

a = (8 -8)/1 - 0.6) = 0 m/s²

For the curve CD:

Average acceleration = [tex]a =\frac{v_f-v_i}{t_f-t_i}[/tex]

a = (0-8)/(1.2 -1.0) = -40 m/s²

For the curve DE:

Average acceleration = [tex]a =\frac{v_f-v_i}{t_f-t_i}[/tex]

a = (-4-0)/(2.0 - 1.2) = 5 m/s²

Therefore, the magnitude of the average acceleration of the cart: Acd > Aab > Ade > Abc

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The change in momentum applied by a boxer to his rival when he strikes him with a force of 200N in 0.05s is 10 Ns

Momentum can be defined as "mass in motion". All objects have mass. So if an object is moving, it has momentum and its mass is moving. An object's momentum depends on two variables: How much matter is moving and how fast is it moving? It is the strength or power gained by a movement or sequence of events.

Momentum (P) equals mass (M) times velocity (v). However there are other ways to think about momentum. Force (F) is equal to change in momentum (ΔP) with respect to change in time (Δt). Also, the change in momentum (ΔP) is equal to the momentum (J). Impulse has the same units as impulse (kg*m/s or N*s).

ΔP = F × Δt

ΔP = 200 × 0.05

ΔP = 10 Ns

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