Calculate the momentum of a boat with a mass of 95kg moving at 2m/Ss

Answer: I do believe the answer is D if not then sorry and let others know in the comment section

The doll experiment did not suggest the African Americans felt more secure and positive because of school segregation. The correct option is D.

School segregation in the United States is the segregation of students based on their colors and caste. An institution can be predominantly owned by the black and only black students can study into it.

The Americans who are black belonged to the African continent. They felt more safety and secure by studying into this segregated school.

Thus, the correct option is D.

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Answer: The main sequence stars lying in different places differ from each other mainly by having different luminosities and temperatures.

What is an H-R diagram?

An H-R diagram is a plot of stars' luminosity (brightness) versus their surface temperature. On the x-axis, surface temperature is represented, while on the y-axis, luminosity is represented. This plot is used to analyze the characteristics of stars and can provide information such as its temperature, radius, mass, and luminosity.

It is a useful tool for astronomers because it can identify different types of stars, including giants, supergiants, and white dwarfs. It can also be used to compare the various stages of a star's life and to predict how stars evolve over time.

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12). When you move your hand or foot, your body has converted potential energy into kinetic energy.

13). When coasting while roller skating, you eventually stop due to

friction causes kinetic energy to transfer to thermal energy.

14).  A ball has 100 J of potential energy when it is on a shelf. The kinetic energy of the ball the instant it hits the floor is Kinetic increases, potential decreases.

Kinetic energy is the force that propels motion, which can be seen in the movement of a particle, an object, or a group of particles. A person walking, a baseball being thrown, a piece of food falling from a table, and a charged particle in an electric field are all examples of objects in motion that use kinetic energy.

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The graph shown in the first option nicely plots the lion's and gazelle's velocities as a function of time, so option A is the correct answer.

Velocity is the rate of change of displacement over time.

As mentioned in the problem of running at a constant speed towards a gazelle with a standing lion as shown above.

So option A is correct.

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The two individuals will move together with a velocity of -2 km/h.

Assuming that the initial velocity of the space shuttle is zero, and neglecting the effect of gravity, the total momentum of the system before the collision is zero, since the space shuttle and the two individuals are at rest. After the collision, the momentum of the system must still be zero, since there are no external forces acting on it.

If your buddy bumps into you and holds onto you, the two of you will move together with a common velocity.

Since your buddy has a velocity of 4 km/h with respect to the ship, the momentum of your buddy before the collision is:

momentum = mass x velocity = m x v = m x 4 km/h

To conserve momentum, the momentum of the two individuals after the collision must also be equal to m x (-4 km/h), since the momentum is opposite in direction.

Since the two individuals have the same mass, their common velocity after the collision can be calculated as:

momentum = mass x velocity = 2m x v'

where;

Therefore:

2m x v' = m x (-4 km/h)

v' = (-4 km/h) / 2 = -2 km/h

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The uniform movement allows finding the results for the helicopter displacement during the 10 s is: 700 m

Kinematics studies the motion of bodies, finding relationships between the position, velocity and acceleration of the body, in the special case that the acceleration is zero, it is called uniform motion and is described by the equation

          \(v = \frac{\Delta s}{t}\)

Where v is the average velocity, Ds is the displacement and t is the time

          Δs = v t

They indicate that the average speed is 70 m / s and the travel time is t=10.0s

Let's calculate

          Δs = 70 10.0

          Δs = 700 m / s

In conclusion using the uniform movement we can find the results for the helicopter displacement is: 700 m

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The magnitude of the helicopter's displacement is 700 meters.

Given the following data:

To find the magnitude of the helicopter's displacement:

Velocity can be defined as the rate of change in displacement (distance) with time.

Also, velocity is a vector quantity and as a result of this, it has both magnitude and direction.

Mathematically, velocity is given by the formula;

\(Velocity = \frac{displacement}{time}\)

Making displacement the subject of formula, we have:

\(Displacement = velocity\) × \(time\)

\(Displacement = 70\) × \(10\)

Displacement = 700 meters.

Therefore, the magnitude of the helicopter's displacement is 700 meters.

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The refractive index of the material is 0.

When the ray is incident on a transparent surface at an angle of 360 and the angle of refraction within the material is 27°, the refractive index of the material can be determined. The formula for Snell’s law is used to calculate refractive index. It states that: `sin i / sin r = n where i is the angle of incidence, r is the angle of refraction and n is the refractive index`.Snell’s law can be re-arranged to make n the subject of the formula to be: `n = sin i / sin r`Hence, we can calculate the refractive index as follows:

For the incident ray, i = 360° and the angle of refraction within the material, r = 27°.n = sin i / sin r= sin 360°/ sin 27°= 0/1 (since sin 360° = 0)= 0Therefore, the refractive index of the material is 0. T

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a. upward. The rider is upside down at the top of the loop, and the seatbelt provides a centripetal force that pulls the rider upward toward the center of the circle, allowing them to follow a circular path.

Centripetal force is a type of force that acts on an object moving in a circular path. It is directed towards the center of the circle and is necessary to keep the thing moving in a circular direction. The centripetal force can be provided by a variety of sources, such as tension in a rope, gravity, or a magnetic field. The magnitude of the centripetal force required depends on the mass of the object, the speed of the thing, and the radius of the circle.

The formula for centripetal force is

F = mv²/r,

where F is the force, m is the mass of the object, v is the velocity of the object, and r is the radius of the circle. Centripetal force is an essential concept in many areas of physics, including mechanics, astrophysics, and engineering, and it plays a significant role in the functioning of many natural and man-made systems, such as planetary orbits, and centrifuges.

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Answer:

power

Explanation:

Answer:

systems

Explanation:

Answer:

Solution: When an ebonite rod is rubbed with fur, fur loses electrons and ebonite rod gains electrons. fur becomes positively charged and rod becomes negatively charged.

Explanation:

HOP3 IT HELP^_^

THANKS^_^

Assessment of initial kinetic energy and last kinetic energy. If the kinetic energies are the equal the collision is elastic.

Most regular collisions are categorized as inelastic collisions because some of the kinetic electricity is transformed into other forms including inner energy. Inelastic collisions are collisions in which kinetic strength is lost. despite the fact that the momentum of the system is conserved in inelastic collisions, now not kinetic power.

This is because some of the kinetic power changed into transferred to every other. Elastic collisions have longer interplay instances and lower maximum forces. Inelastic collisions showed some interesting consequences. A issue in appearing this experiment lies in the use of substances that produce inelastic collisions.

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Given :

An object with weight 20 N was lifted to 0.5 meters.

To Find :

How high must you lift a 25 Newton book for it to have the same increase in potential energy as the given book.

Solution :

Since both have same potential energy :

\(P.E_2 = P.E_1\\\\W_2h_2 = W_1h_1\)

Putting all given values in above equation :

\(25h_2 = 20\times 0.5\\\\h_2 = \dfrac{20\times 0.5}{25}\\\\h_2 = 0.4\ m\)

Therefore, book with same potential energy is at a height of 0.4 m.

Answer:

Average Velocity = - 1.22 cm/s = - 0.0122 m/s

Explanation:

The average velocity of an object is defined as the ratio of the total distance traveled by the object to the total time taken by the object to cover the distance. Therefore, the average velocity of an object can be found by the following formula:

Average Velocity = Total Distance Covered/Total Time Taken

Average Velocity = (Final Position - Initial Position)/Total Time Taken

Average Velocity = (3.7 cm - 6.5 cm)/(2.3 s)

Average Velocity = (- 2.8 cm)/(2.3 s)

Average Velocity = - 1.22 cm/s = - 0.0122 m/s

here, the negative sign indicates the direction of the velocity or the movement of the object is leftwards or towards the origin approaching from right.

Average velocity is defined as the displacement of an object with regards

to the time taken.

The formula for average velocity is

Velocity = Average distance covered / Time

The distance = 6.5cm to 3.7cm

Time taken= 2.3s

= D₂ - D₁ / T

= 3.7cm - 6.5cm / 2.3s

= -2.8cm / 2.3s

= - 1.2cm/s

= - 0.012m/s

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Explanation:

The amount of CD is 35 g, and the amount of AC is 40 g.

Explanation:

AB + CD \rightarrow AC + BDAB+CD→AC+BD

The law of conservation of mass states that in any chemical reaction, the total mass of the reactants must be equal to the total mass of the products.

In this reaction, we know the mass of one reactant (AB, 15 g) and the mass of one product (BD, 10 g). In order to have the same total mass on the left side and on the right side of the equation, the mass of AC must be 5 g more than the mass of CD. We see that the only choice that satisfies this condition is:

The amount of CD is 35 g, and the amount of AC is 40 g.

In fact, if we assume these masses are correct, we have:

- on the reactant side: m(AB)+m(CD)= 15g + 35g = 50g

- on the product side: m(AC)+m(BD)= 40g + 10g = 50g

so, we have the same mass on both sides of the equation, and the law of conservation of mass is satisfied.

Answer:

B is  the answer on edge

Explanation:

B: The amount of CD is 35 g, and the amount of AC is 40 g.

Answer:

slowsdown, heat

Explanation:

Hope it helps!!

When cycling forward in a straight line, the knee is rotating about a(n) horizontal axis.

Cycling, often known as bicycling or biking when done on a two-wheeled bicycle, refers to the use of cycles for transportation, recreation, exercise, or sport. Cycling enthusiasts are known as "cyclists," "bicyclists," or "bikers." In addition to riding a two-wheeled bicycle, "cycling" also refers to using a recumbent bike or other comparable human-powered vehicles (HPVs), such as a unicycle, tricycle, or quadricycle.

Since their invention in the 19th century, bicycles have grown to almost one billion in number globally. In many regions of the world, especially in heavily populated European towns, they are the main form of transportation. For short to medium distances, cycling is widely regarded as an effective and efficient means of transportation.

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The total-ionic equation for the reaction between aqueous lithium bromide (LiBr) and aqueous lead(II) nitrate (Pb(NO3)2) can be determined by considering the combination of ions and their charges.

The molecular equation for the reaction would be:

Pb(NO3)2 (aq) + 2 LiBr (aq) → PbBr2 (s) + 2 LiNO3 (aq)

To write the total-ionic equation, we break down the ionic compounds into their respective ions and indicate their charges. The solubility rules help us determine whether the resulting compounds are soluble or insoluble.

Using the solubility rules, we find that lithium nitrate (LiNO3) and lead(II) bromide (PbBr2) are both soluble in water, while lead(II) nitrate (Pb(NO3)2) is also soluble.

The total-ionic equation, including the dissolved ions and the state symbols, would be:

Pb2+ (aq) + 2 Br- (aq) + 2 Li+ (aq) + 2 NO3- (aq) → PbBr2 (s) + 2 Li+ (aq) + 2 NO3- (aq)

In the total-ionic equation, the spectator ions (Li+ and NO3-) remain unchanged on both sides of the equation and can be eliminated in the net-ionic equation, which focuses on the species involved in the actual chemical change.

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The spring's maximum compression if the track is frictionless is 0.121 m.

Define potential energy of spring ?

The potential energy of a spring is the energy that is stored in a spring when it is compressed or stretched from its equilibrium position. It is a form of elastic potential energy, which is the energy stored in an object that is deformed by stretching, compressing, or twisting.

The potential energy of a spring is proportional to the square of its displacement from its equilibrium position. This relationship is described by the formula:

\(U = (1/2)kx^2\)

where U is the potential energy stored in the spring, k is the spring constant (a measure of the spring's stiffness), and x is the displacement of the spring from its equilibrium position.

Given by the question :

To solve this problem, we can use the conservation of mechanical energy principle, which states that the initial mechanical energy of the system (kinetic energy of the block) is equal to the final mechanical energy of the system (potential energy of the spring when compressed).

The formula for the potential energy stored in a spring is:

\(U = (1/2)kx^2\)

We can use this formula to find the compression of the spring:

Find the initial kinetic energy of the block:

\(KEi = (1/2)mv^2\)

where KEi is the initial kinetic energy, m is the mass of the block, and v is the initial speed of the block.

Plugging in the values, we get:

\(KEi = (1/2)(0.200 kg)(1.20 m/s)^2 = 0.144 J\)

Find the final potential energy stored in the spring:

\(KEi = U\)

where KEi is the initial kinetic energy and U is the potential energy stored in the spring.

Plugging in the values, we get:

\(0.144 J = (1/2)(5.15 N/m)x^2\)

Solving for x, we get:

\(x = sqrt(0.144 J / (1/2)(5.15 N/m)) = 0.121 m\)

Therefore, the spring's maximum compression is 0.121 m.

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The magnitude of the induced emf in a wire is given by the rate of change of the magnetic field, which is 3.0 mT/s.

According to Faraday's law of electromagnetic induction, the magnitude of the induced electromotive force (emf) in a wire is directly proportional to the rate of change of the magnetic field.

In this case, the magnetic field B points in the positive x direction, and it increases at a rate of 3.0 mT/s (millitesla per second). Therefore, the magnitude of the induced emf in the wire is also 3.0 mT/s. This indicates that for every second the magnetic field increases by 3.0 mT, an emf of 3.0 millivolts is induced in the wire. The direction of the induced emf can be determined using Lenz's law.

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The AM radio transmitter emits approximately 9.94 x \(10^{31}\) photons per second.

To calculate the number of photons emitted per second by an AM radio transmitter, we'll need to use the following terms and equations:
Power (P): This is the amount of energy transferred or converted per unit time. In this case, the transmitter radiates 500 kW (kilowatts).
Frequency (f): The number of cycles of a periodic wave that occur in a unit of time. In this case, the frequency is 760 kHz (kilohertz).
Planck's constant (h): A fundamental constant with a value of approximately 6.626 x \(10^{-34}\) Js (joule-seconds). This constant relates the energy of a photon to its frequency.
The energy (E) of a single photon can be calculated using the equation:
E = h x f
Next, we need to convert the power and frequency to the appropriate units:
P = 500 kW x 1,000 (to convert kW to W) = 500,000 W
f = 760 kHz x 1,000 (to convert kHz to Hz) = 760,000 Hz
Now, we can calculate the energy of a single photon:
E = (6.626 x 10^-34 Js) * (760,000 Hz) = 5.035 x \(10^{-28}\) J
To find the number of photons emitted per second (n), we will divide the total power (P) by the energy per photon (E):
n = P / E

n = (500,000 W) / (5.035 x \(10^{-28}\) J)

n ≈ 9.94 x \(10^{31}\) photons per second
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Answer:

a. Please find attached the required scale diagram drawn to scale using Microsoft Word

The resultant tension, R = W = 42.415 N

Explanation:

The given parameters are;

The angle P and Q makes with the horizontal = 45°

The tensions in the ropes P and Q = 30 N each

The weight of the heavy ball B suspended from the fixed beam by the ropes = W

The scale drawing is drawn using Microsoft Word

The required scale factor of the scale diagram, S.F. = 5.0 N/cm

Therefore, we have;

The length of the line representing the tensions P and Q = 30 N/(5.0 N/cm) = 6 cm

The length of the resultant vector, R = \(\underset{P}{\rightarrow}\) + \(\underset{Q}{\rightarrow}\)

By the parallelogram law of vector addition, by measurement, we have;

R = 8.483 cm

By conversion using the scale factor of the scale drawing, we have;

R = R × S.F. = 8.483 cm × 5.0 N/cm = 42.415 N

∴ The resultant in the tensions, R = \(\underset{P}{\rightarrow}\) + \(\underset{Q}{\rightarrow}\) = 42.415.

Answer:

They are inversely related.

Explanation:

The speed of any wave is given in terms of its wavelength and frequency as follows :

\(v=\nu \times \lambda\)

Here,

\(\nu\) = frequency of a wave

\(\lambda\) = wavelength of a wave

Also, the frequency of a wave is reciprocal of its frequency. So, the formula becomes :

\(v=\dfrac{\lambda}{T}\), T is the time period of a wave

It is clear from above that the speed of a mechanical wave is inversely proportional to its time period. Hence, b is correct option.

The answer is:

They are INVERSLEY RELATED

Based on the principle of moments, the moment of the 100 N force is 50 J.

The moment of a force, also known as torque, is a measure of the rotational effect or turning effect produced by a force about a particular point or axis.

Mathematically, the moment of a force (τ) is given by:

τ = Force × perpendicular distance

The moment of the 100 N force will be:

force = 100 N

the perpendicular distance from the axis of rotation = 50 cm (75 -25)

Moment = 100 * 0.5

Moment = 50 J

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Answer:    As you probably have seen in the ocean or a lake, the stronger the wind, the higher the waves. The period and wavelength can be expressed in terms of their reciprocals, the wave frequency ω = 2(pi)/T, and the wave number κ = 2(pi)/λ.

Explanation:     To find the period, we solve for T=1f, given the value of the frequency (f=2s−1). T=12 s−1=0. 5 s. Since one definition of wavelength is the distance a wave has traveled after one complete cycle (or one period), the values for the wavelength (λ=0.9m) as well as the frequency are given.

Answer:c

Explanation:

Answer:

c

Explanation:

Answer:

10

Explanation:

yum lang po alam ko sana po tama yun

a)The time taken between the parcel leaving the airplane, and it's striking the ground will be 6.38 second

c)The speed at which the parcel strikes the ground will be 62.64 m/sec.

Speed is defined as the rate of change of the distance or the height attained. it is a time-based quantity. it is denoted by U for the initial speed while V for the final speed. its SI unit is m/sec.

The given data in the problem is;

Steady speed (V)= 90 m/s

Altitude (h) = 200 m

Time taken (t)=?

horizontal distance travelled(d)=?

Striking speed(V)=?

The striking speed is;

\(\rm V^2=U^2+2gh \\\\ V=\sqrt{2gh} \\\\V=\sqrt{2\times 9.81 \times 200} \\\\ V= \sqrt{3924} \\\\ V=62.64 \ m/sec\)

The time taken is found as;

\(\rm H = ut + \frac{1}{2} gt^2 \\\\ 200=0+ \frac{1}{2} \times 9.81 \times t^2 \\\\ t=6.38 \ sec\)

Hence, the time taken between the parcel leaving the airplane, and it's striking the ground will be 6.38 second

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