As an object is thrown up , if up is considered negative, what is the direction of the velocity and acceleration of the object as the travels up?

Answer:

motion law was given by newton.

Law of Inertia, Law of Mass and Acceleration, and the Third Law of Motion is the 3 law of motion

Explanation:

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Answer:

56.25J

Explanation:

Kinetic energy = 1/2 x 4.50 x (5.00)^2= 1/2 x 4.50 x (5.00 x 5.00)= 1/2 x 4.50 x 25Multiply through = 112.5/2= 56.25J

The object is moving at a constant velocity between time 4 s to 6 s. The correct answer is option A

This is the graph of velocity plotted against time. The slope of the graph is acceleration and the area under the graph is total distance travelled by the body.

Acceleration means increase in speed which is the positive slope of the graph between t = 0 s and t = 4 s

Between t = 4 s and t = 6 s the velocity is constant and acceleration = 0 because the slope of the graph is zero.

Deceleration means decrease in speed. That is, the body is slowing down. This happened between t = 6 s and t = 9 s

Therefore, the object is moving at a constant velocity between time 4 s to 6 s

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Dark and light interference patterns on a screen after light waves have gone through a slit is NOT an example of diffraction

The process by which wave energy disperses perpendicular to the predominant direction of wave propagation is known as wave diffraction. Wave diffraction is particularly interested in abrupt changes in boundary conditions, such as those at breakwater roundheads, where diffraction transfers wave energy into the shadow zone.

Waves spread out when they go through an aperture or around objects, which is known as diffraction. It happens when the aperture's or obstacle's size is of the same order of magnitude as the wave's wavelength.

When waves go from one medium to another, they may refract, changing their direction. A shift in speed and wavelength always accompany refraction. Diffraction is the wave's bending.

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The acceleration is computed at 16.625ms⁻²;

The Magnitude of Net Force = 814.625 N; and

The Magnitude of upward force exerted by tail fin = 1,294.825 N. See the explanation below.

Mass of the salmon fish = 49 kg

Length of the Salmon Fish = 1.5 m

g = 9.8 ms⁻²

[A] salmon's acceleration during the time interval N:

Downward Force on the fish is equal to the Force due to gravity and is given as:

F₂ = mg

= 49 * 9.8

= 480.2 N

The direction of movement of the fish is upward and the acceleration is constant. We are given two different velocities of fish at two different instances.

When the head breaks out of the water surface first:

Initial velocity = v₁ = 3 m/s

When two third of its body length is out = d = 1 m

Final Velocity = v₂ = 6.5 m/s

Using the third equation of motion:

2*a*d = v₂² - v₁²

a = (6.5² - 3²)/2*1

a = 16.625 ms⁻²

[B] magnitude of force F during this interval N = ?

We are assuming that F is the net force consisting of both the upward and the downward force.

According to Newton's 2nd law of motion, Force is given as:

F = ma

F = 49 kg * 16.625

F = 814.625 N

Magnitude of upward Force = Fₓ

Force Fₓ exerted by the tail fin of the fish is given by

F = Fₓ - F₂

=>   Fₓ = F + F₂

Fₓ = 814.625 + 480.2

Fₓ = 1294.825 N

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Answer:

Question 1;

[tex]{ \bf{boyle s \: law}}[/tex]

Question 2;

[tex]{ \tt{a = \frac{1}{22} }} \\ \\ { \tt{a = 0.05}}[/tex]

Question 3;

The acceleration can be calculated using the third free fall equation. Paola will accelerate throughout flight at a rate of 39.55 m/s2.

Acceleration is a quantity that is inversely related to time taken as well as having a direct link with velocity. A vector quantity, that is.

The third free fall equation can be used to calculate Paola's acceleration.

V^2 = U^2 + 2 as

where s is the distance travelled, an is the acceleration, V is the final velocity, U is the beginning velocity, and

Given the query, the values are: s = 22.3 cm (0.223 m), U = 4.20 m/s, and V = 0.

Poala defies gravity, so as a result, we have:

0 = (4.20)² - 2(a x 0.223)

= 17.64 - 0.446a

0.446a = 17.64

a = 17.64/0.446 = 39.551

a = 39.55 m/s²

Therefore Paola's acceleration is

39.55 m/s²

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Flute, Clarinet, Saxophone, Piccolo, Tenor Sax oboe

Piccolo

Flute

Clarinet

Saxophone (all registers)

Oboe

English Horn

Bassoon

The lamps shown in the diagram are connected in parallel.

The impact on the output voltage and the capacity of the battery system is the primary distinction between wiring batteries in series and parallel. The voltages of batteries connected in series will be added. Batteries connected in parallel will have their amp-hour capacities added together.

Because the voltage stays the same while the amps increase, parallel batteries last longer. It will still be a 12 volt system if you connect two 12v 50ah batteries in parallel, but because the amps double to 100ah, the batteries will last longer.

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The mass of calcium in given density and volume is 0.5133g.

ρ = m / V

where

ρ is density,

m is mass,

V is volume,

Given,

ρ = 1.54g/ml

V = 3 ml

m = ?

Putting values,

1.54 g/ml = m / 3ml

m = 0.5133g

The relationship between mass and volume can be easily determined using density; for example, the mass of a body is equal to its volume multiplied by the density (M = Vd), whereas the volume is equal to the mass divided by the density (V = M/d).

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Answer:

energy cannot be created or destroyed, although it can be changed from one form to another. KE + PE = constant.

Explanation:

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Answer:

It states that the magnitude of force is directly proportional to the product of charges at points and inversely proportional to the square of their separation distance

Explanation:

[tex]{ }[/tex]

Answer:

It states that the magnitude of force is directly proportional to the product of charges at points and inversely proportional to the square of their separation distance

Explanation:

[tex]{ }[/tex]

The skateboarder touches a distance of R= 7.09m from the end of the ramp.

Velocity can be defined as the rate of change of the object's position with respect to a frame of reference and time.

From the given instance, the skateboarder touches a distance of R= 7.09m from the end of the ramp

Velocity along y axis = 9.0 sin30 = 4.5m/s.

Velocity along x axis = 9cos30 = 7.79m/s

Vfinal -Vinitial  = acceleration * time

4.5 = 10t ; t(up) = 0.45s.

Hy =  9*(sin 30°)*T1 - (1/2)*g*T1^2  [ upward movement]

Hy= 9*(1/2)*0.45 - (1/2)*9.81*0.45^2

Hy = 2.025 - 0.993

Hy = 1.032

T2 = √[(2/9.81)*1.032] = 0.46

R = (T1 + T2)*9*(cos 30°)

R= (0.45+0.46)* 9* 0.8660

R= 7.09m

In conclusion, Velocity is a vector quantity that refers to "the rate at which an object changes its position.

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Chun's spring exercise would be an anaerobic process which is the correct answer would be an option (A).

The rate-limiting phases in anaerobic processes are the hydrolysis conversion rate and the rate at which methanogenesis uses soluble substrates. The overall amount of solids converted is affected by the hydrolysis of colloidal and solid particles, although neither the process operation nor stability is affected.

Anaerobic means "without oxygen," so this sort of exercise causes the body to break down glucose without the use of oxygen.

At the end of his 100-meter sprint, Chun's muscles are burning.

So Chun's spring workout would involve anaerobic activity.

Therefore, Chun's spring exercise would be an anaerobic process.

Hence, the correct answer would be an option (A).

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Answer:

Option A

Explanation:

The average speed of Maria and Kuba in km/h is 120 km/h.

The average speed of Maria and Pierre in km/h is 8 km/h.

The average speed of Maria and Kuba in km/h is calculated as follows;

v = distance / time

distance = 30 km

time = 15 minutes = 15/60 = 0.25 hour

v = 30 km / 0.25 hr

v = 120 km/h

The average speed of Maria and Pierre in km/h is calculated as follows;

v = distance / time

distance = 2000 m = 2 km

time = 900 seconds = 900  / 3600  = 0.25 hour

v = 2 km / 0.25 hr

v = 8 km/h

Thus, the average speed of Maria and Kuba in km/h is 120 km/h.

The average speed of Maria and Pierre in km/h is 8 km/h.

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The speed of the camera hits the ground it depend on height and g.

An object in free fall is one that is under the influence of gravity and is accelerating towards the earth's surface. Freefall formulae may be used to characterize this motion, allowing us to solve for the components of the object's motion at different time frames. This time range can be when the item is released, when it reaches the Earth's surface, or anyplace in between.

energy conservation to equal change in gravitational potential energy on mass attached to spring and elastic potential energy of stretched spring. Then, in the equation, substitute the specified numbers and solve for the spring constant. Then, calculate the amplitude by taking half of the value of spring stretching from equilibrium, and the frequency of oscillation by using the calculation for frequency of oscillation in a stretched string in terms of mass and spring constant.

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If a Spider man leaves the ground at 13.2 m / s , he can get about 8.89 m high .

In this question Equation of Motion under gravity can be used :

v ² - u ² = 2 g h ............. Eq. 1

Here ,

u = 13 . 2 m / s

v = 0 m / s

g = - 9.8 m / s ² ( -ve as motion is against the gravity )

Now , we can use the values of u , v and g in Eq 1 .

v ² - u ² = 2 g h

0² - ( 13.2 ) ² = 2 x ( - 9.8 ) x h

0 - 174.24 = - 19.6 x h

- 174.24 = - 19.6 x h

h = 8.89 m

Hence , if a Spider man leaves the ground at 13.2 m / s , he can get about 8.89 m high .

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(a) The acceleration of the 1,400-kg boat is 0.30 m/s².

(b) The boat move 60 m in 20.0 s

(c) The velocity at the end of that time will be 6 m /s

It is given that mass of the boat = 1400 kg , forward push on the boat by the propeller = 1,725 N and resistive force of water = 1300 N

(a) Let the acceleration of the boat be "a" .

The net force on the boat will be

F(net) = F(push) - F(R)

         = 1725 - 1300

         = 425 N

Using Newton's second law of motion , we get

F(net) = ma

       a = F(net) / m

          = 425 / 1400

          =  0.30 m/s²

(b) Let the distance moved by the boat be "d" .

It is given that it starts from rest which means that u = 0

Now using the kinematic equation  s = ut + 1/2at² .   ...(1)

Putting a = 0.30  , t = 20 and u = 0  in equation (1) , we get

     s = 0 (20) + 1/2 (0.30)(20)²

        = 0 + 1/2 (0.30 × 400)

        =  120 /2

        = 60 m

(c) Let the final velocity of the boat be "v" .

Using the kinematic equation v = u + at     ..(2)

Putting a = 0.30  , t = 20 and u = 0  in equation (2) , we get

   v = 0 + (0.30)(20)

      = 6 m /s

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The density of the given details is ρ = 2.5 g/ml.

To find density

Using formula,

ρ = m / V

Given,

m = 55g

V = 22ml

ρ = ?

Putting values,

ρ = 55 g / 22.0 mL

ρ = 2.5 g/ml

The density of an area refers to the quantity of things—which may include people, animals, plants, or objects—there are in it. Divide the number of objects by the area's measurement to determine density. A country's population density is calculated by dividing its total population by its area, expressed in square kilometers or miles.

There are two types of density: absolute density and relative density. The ratio of a material's density to the density of a reference material is known as its relative density, also referred to as specific gravity.

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There are just two factors that matter when discussing the gravitational pull of one item on another: the mass of each object and the distance between them.

This is further explained below.

Generally, According to Newton's global law of gravitation, the amount of force exerted by the attraction between any two bodies is directly related to the sum of their masses and inversely related to the square of the distance that separates them from one another.

In conclusion, The magnitude of the gravitational pull between two objects is proportional to the product of their respective masses and the square of the distance that separates them.

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Answer:

acceleration = 3.02 m/s²

Explanation:

To calculate the acceleration, we can use the formula for force:

[tex]\boxed{F = ma}[/tex],

where:

F = force applied

m = mass of object

a = resultant acceleration.

We can rearrange the above formula to make acceleration (a) the subject:

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

⇒ a = [tex]\frac{87.2}{28.9}[/tex]

⇒ a = 3.02 m/s²

Therefore the acceleration given to the box is 3.02 m/s².

The distance of tiger's leap from the base of rock is 5.58 m

It is a question of two dimensional motion

The time of motion in two dimensional motion is given by:

t= [tex]\sqrt{2y/g}[/tex]

where y is the height and g is  the acceleration due to gravity

y is given to be 7.5m and let us assume g to be 9.8 m/s^2

t = [tex]\sqrt{2 * 7.5/9.8}[/tex]

 = 1.24s

Using time and speed,

We know that distance is the product of speed and time,

Distance= speed x time

speed is given to be 4.5 m/s

distance from the base of rock = 4.5 x 1.24

                                                    = 5.58m

Hence the distance of tiger's leap from the base of rock is 5.58 m

Disclaimer:

The acceleration due to gravity is assumed to be 9.8 m/s^2

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Answer:

The most common causes of a generator producing no power are the loss of residual magnetism in the alternator and a failed AVR or another excitation component. If the voltage is around 50-70V on each phase, then it is likely the AVR needs replacement.

Explanation:

where is the questions you are asking

Answer:

firstly

kinetic and potential are two types of mechanical energy

Answer:

A because it was rejected as it cannot become a law it was totally wrong as compared to today's information about out universe that how big bang theory was there.... So it is right the option A

Answer:D

Explanation:D

If a product claims to be low-calorie, then it means that it must contain 40 calories or fewer per saving. Hence, option D is correct.

Our bodies need energy to keep us alive and to make sure that our organs are functioning properly.

When we eat and drink, we provide our bodies with energy. Our bodies consume that energy during routine tasks like breathing and jogging.

To keep a constant weight, the amount of energy we put into our bodies must correspond to the amount of energy we expend during routine biological functions and physical activity.

A key element of a balanced diet is striking a balance between the energy you put into your body and the energy you expend.

For instance, the more physical activity we do, the more energy we use.

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The potential energy of a body with given mass and height is, P.E. = 8,820 J.

P.E. = mgh

where,

m is the mass in kilograms,

g is the acceleration due to gravity

h is the height in meters

Given data,

mass = 30 kg

height = 30m

acceleration due to gravity = 9.8 m / s²

P.E. = ?

Using formula,

P.E. = mgh

Putting values,

P.E. = 30 x 9.8 x 30

P.E. = 8,820 J

Potential energy is a form of energy that is stored but is dependent on the relative positions of different system components. Stretching or compressing a spring increases its potential energy. A steel ball has more potential energy when it is raised above the surface of the earth than when it is brought to Earth.

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