What is the magnitude of force A,B

Answer: yes

Explanation:

The minimum velocity the roller-coaster need when going over the 12 m  to make it to the top of the 30 m hill is equal to 18.78 m/s. Therefore, option (D) is correct.

Energy can be transformed from one to another but can neither be created nor destroyed. Energy is present in nature in several forms such as heat, nuclear energy, electricity, chemical energy, and so on.

If every form of energy is considered, then the total energy of an isolated system remains constant. This law of energy applies to all types of energy in our universe.

From the law of conservation of energy, the energy of the roller-coaster goes:

[tex]{\displaystyle \frac{1}{2} mv^2 +mgh_1 = mgh_2[/tex]

Given the height of the first hill, h₁ = 12m

The height of the second hill, h₂ = 30 m

The gravitational acceleration, g = 9.8 m/s²

We can find the value of the minimum velocity of the roller-coaster from the above equation:

[tex]{\displaystyle \frac{1}{2} v^2 +gh_1 = gh_2[/tex]

0.5 × v²  + (9.8) × 12 = (9.8) × 30

0.5 v² = 176.6

v = 18.78 m/s

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The magnitude of the force of the mosquito on the truck is same as the magnitude of the truck on the mosquito.

When we push or pull an object, then we say that a force is applied to it. Depending on its direction, the force might be either positive or negative.

The Newton's third law of motion states that if a force is applied to an object by an external agent, then the object applies the same magnitude of the force on the agent but that this force is in the opposite direction to the original force direction. So, forces always occur in a pair.

Even though the two forces in a pair act in different ways on distinct objects, they are equal.

In the given question, when the mosquito hits the shield of the truck then it applies a force on the car, and the car also applies the same magnitude of the force on the mosquito.

Thus, the force on the mosquito by the truck has the same magnitude as the force on the truck by the mosquito.

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Answer:

a

Explanation:

Answer:

the Equionox

Explanation:

there are only teo times of the year when the earths axis

is tilted neither toward nor away from the sun, resulting on a nearly equal amount of daylight and darkness at all latitudes. these events are referred to as equionoxes

The observed frequency will be greater than the source’s frequency (option - A) is correct answer.

If the source and observer are moving simultaneously in either case—moving observer or moving source—you'll notice that the frequency increases. The frequency decreases if they are drifting apart. Whether the source is moving or the observer is moving will affect how much the frequency changes.

Although the waves move at the same speed, the frequency that is observed is affected by any relative movement between the source and the observer. The wavelength changes along with the observed frequency. When an observer and a source are moving in the same direction, the frequency rises and the wavelength falls.

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The mass of the object  when  a net force of 125 n is applied to a certain object is  5.2 kg

Newton's second law in one dimension states that the net force acting on an object is equal to the product of the object's mass and its acceleration. In mathematical form, the law is expressed as:

F = ma

Where F is the net force, m is the mass of the object, and a is the acceleration of the object.

In this case, we are given that a net force of 125 n is applied to an object and that the object accelerates with an acceleration of 24.0 m/s2. We are asked to find the mass of the object.

We can solve for the mass using the equation above:

m = F / a

= 125 n / 24.0 m/s2

= approximately 5.2 kg

Therefore, the mass of the object is approximately 5.2 kg.

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Answer:

D. A decrease in its operating temperature

Stars with a mass greater than 15 times that of the sun typically transition directly from the hr diagram to the red giant stage while maintaining a nearly constant luminosity.

A quantity that is supposed not to shift value in a particular mathematical debate is one that has a specific amount in a specific context, is true globally, or is a feature of some material or instrument.

A digit (0–9) or a period serves as the initial of a constant sign. A constant symbol's value cannot be altered. It is merely the string made up of the symbol's characters, all lowercase alphabetic characters having been converted to uppercase.

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The car is going the same speed as the truck and the truck and car are at the same height can not be true. Therefore, option (B) is correct.

Mechanical energy can be defined as the sum of potential energy and kinetic energy that is used to do work. Mechanical energy defines the energy of a body because of its position or motion.

The total mechanical energy can be considered conserved when the forces doing work are conservative in nature. The energy changes between different kinds of potential energy and kinetic energy but the total energy of the system remain constant.

Kinetic energy and the potential energy of the car and the semi-truck will depend on the masses of the objects. The semi-truck must have a greater mass than the car. Therefore, the car and the semi-truck must have different values of speed and height if they have the same total mechanical energy.

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Answer:46m

Explanation:

If a kiloparsec (kpc) is equal to 1000 parsecs, light years is a kiloparsec equal to: 3, 260 light years.

The distance that light travels in a light-year is one year. At 186,000 miles (300,000 kilometres) per second and 5.88 trillion miles (9.46 trillion kilometres) per year, light travels through interstellar space.

Since a light-year is the maximum distance light can travel in one year and nothing can move faster than that, the answer appears to be 13.8 billion light-years.

Thus, 3,260 many light years is a kiloparsec.

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One batch of cookies need 1/2 pounds or 0.21 Kg. Thus, 12 batches of cookies need 2.61 kg of butter.

Mass of a substance is the measure of its total amount. Mass of a substance can be expressed in g, Kg, pounds, lbs etc. Each units can be interchanged with certain relations.

One pound of mass = 0.435 Kg.

Thus, 1/2 pound = 0.435/2 = 0.21 kg.

Given that one batch of cookies need 1/2 pounds or 0.21 Kg. Hence, the amount of butter need to prepare 12 batch of cookies is :

= 12 × 0.21 Kg = 2.61 kg.

Therefore, the mass of butter required for 12 batches of cookies is 2.61 Kg.

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Answer:

Below

Explanation:

The strength of Earth’s gravity decreases as an object gets farther from Earth.   <===== this is the only statement that is true

Answer:  (There are two statements)

The strength of Earth's gravity decreases as an object gets farther from Earth.

The strength of gravity depends on an object's mass

Explanation:

Simply said, open and closed are infinite or finite. Its critical density is a factor for the geometry. The cosmos is closed (limited) and positively curved like the surface of a ball if the density parameter is larger than 1.

Since space expands exponentially during inflation, it is really pushed extremely swiftly toward critical density, which explains why we are so close to the critical mass density.

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For a closed universe, the angular diameter distance is not monotonic. This is because in a closed universe, the expansion rate is decelerating due to the gravitational pull of matter, causing light to bend and curve as it travels through the universe.

This curvature effect can cause the apparent size of objects to vary as a function of their distance, leading to a non-monotonic angular diameter distance.

On the other hand, for an open universe, the angular diameter distance is monotonic. This is because in an open universe, the expansion rate is accelerating due to dark energy, causing light to travel in straight lines and maintaining a constant relationship between the physical size of an object and its angular size as it moves further away. Therefore, the angular diameter distance increases monotonically with distance in an open universe.

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Long-duration spacecraft use the potent rocket fuel LOX + LH as a propellant. The spacecraft's long-term survival in the outer solar system is ensured by the use of this propellant.

To be utilized on commercial space launch vehicles is the propellant Lox/LH2. For massive space rockets, liquid oxygen was the first, least expensive, safest, and ultimately favoured oxidizer. Its fundamental flaw is that it is only mildly cryogenic, making it unsuitable for military applications where speedy launch and storage of the missile's fuel are essential. All the top rocket thinkers agreed that liquid hydrogen was the theoretically ideal rocket fuel.

LH2 and LOX are fed into each engine's combustion chamber after being placed in the tanks and when the launch countdown approaches zero. When the propellant is lit, the hydrogen and oxygen react violently to create: water

O2 + 2H2 = 2H2O + Energy

Superheated water and enormous quantities of energy are released in this "green" process (steam). The water vapour expands and leaves the engine nozzles at speeds of 10,000 mph due to the hydrogen-oxygen reaction's intense heat.

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Answer:

Below

Explanation:

VERTICAL velocity will be   v  sin 34

HORIZONTAL velocity will be   v cos 34  = 86 cos 34 = 71.3 m/s

With a pressure head of 13.0 m and a 1.90 cm diameter tap, the volume rate of water flow is about. 3.97 × 10⁻³m³/s.

Given:

The faucet's diameter (d) is 1.90 cm (0.019 m).

Pressure head (h) = 13.0 m

The formula for the volume rate of flow (Q) through a pipe or faucet is given by:

Q = A × v

The radius of the faucet (r) is half of the diameter:

r = d / 2 = 0.019 / 2 = 0.0095 m

The cross-sectional area of the circular opening is given by:

A = π × r²

v = √(2 × g × h)

v = √(2 × 9.81 × 13.0)

v = √(254.46)

v = 15.95 m/s

Now, we have both A and v. Let's calculate the volume rate of flow (Q):

Q = A × v

Q = π × (0.0095)² × 15.95

Q = 3.97 × 10⁻³m³/s

With a pressure head of 13.0 m and a 1.90 cm diameter tap, the volume rate of flow of water is therefore about. 3.97 × 10⁻³m³/s.

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The complete question is:

What is the volume rate of flow of water from a 1.90- cm -diameter faucet if the pressure head is 10.0 mm?

The mass of the clay that spinning freely with a speed of 40.0 rpm sticks to a distance of 1.2 m from the axis of rotation and the subsequent angular velocity of the wheel and the clay 32 rpm is 4.2 kg.

The law of conservation of angular momentum is an analogy of the law of conservation of linear momentum. If we look back at Newton's II law for translational motion, a similar relationship will apply to the law of the conservation of momentum.

The law of conservation of angular momentum is a law that states the amount of momentum before and after producing the same or constant collision.

The equation is:

I₁ω₁ = I₂ω₂

We have,

Initial angular speed of the system = 40.0 rpm ⇒ ω₁

Final angular speed of the system = 32 rpm ⇒ ω₂

This question is incomplete, it should be the moment of inertia of potter's wheel = 24 kgm²  ⇒ I₁ = I₂

Distance of clay from axis of rotation = 1.20 m ⇒ R

So, to determine the mass of the clay we can use conservation of angular momentum:

I₁ω₁ = I₂ω₂

(24) (40) = (24 + m (1.20)²) (32)

m = 4.2 kg

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Answer:

True

Explanation:

0.525 m³ minimum volume must the slab have for a 42.0 kg woman to be able to stand on it without getting her feet wet.

Add the biggest possible inaccuracy to each metric, then multiply to get the biggest volume you can. Subtract the largest potential mistake of each measurement, then multiply, to determine the smallest volume that can be produced.

1000 kg/m³ = density of water

920 kg/m³ = density of ice

BF = Woman Weight + Slab Weight

Pvg = 42 + Pvg

V = 42 kg / (1000 - 920)

V = 42 / 80

V = 0.525 m³

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The conclusion that can be drawn from the energy transformation diagram is "the chemical potential energy is transformed into 75J of kinetic energy and 25J of heat energy".

option A is the correct answer.

The law of conservation of energy states that energy can neither be created nor destroyed but can be converted from one form to another.

This implies that energy is always conserved as it be converted from one form of energy to another. Such as;

In the given scenario such that 100 J of  potential energy is transformed to produce kinetic energy and the battery causes a fan to spin using 75 J of kinetic energy converted from the 100 J of potential energy.

We can conclude the following based on the given scenario;

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Answer:

76.67% efficient

Explanation:

11500/15000*100

The correct statement is:

"The higher the value of the Hubble constant, the faster the universe is expanding and the younger it should be."

The Hubble's constant, named after American astronomer Edwin  Hubble, is a measure of the expansion rate of the universe. It is defined as the ratio of the speed at which a galaxy is moving away from an observer to its distance from the observer. We can use this constant to calculate the age of the universe by estimating how long it took the universe to reach its current size.

The higher the Hubble constant, the faster the galaxies are moving away from each other. This means that the universe is also expanding faster, so it should be younger. Conversely, a small value of the Hubble constant means that the universe is expanding slowly, and therefore must be older.

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-1.4m/s² is the negative acceleration when the car completely stops in a time of 50sec.

v=u+at in this v= final velocity u=  initial velocity , a = acceleration of the car and t= time

initial velocity of car u= 70m/s

final velocity of the car is v= 0 m/s after stop the car is in rest position

time t =50s, now substitute these values in equation

0=70+a(50)  which is -1.4 m/s².

here we got the answer in negative acceleration. Which is called as Deceleration.

Hence-1.4m/s² is the negative acceleration when the car completely stops in a time of 50sec

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1. The atomic mass of the new atom be 252. Option (d) is correct.

2. The atomic number of the new atom be 100. Option (j) is correct.

3. The symbol of the new atom be Fm.  Option (e) is correct.

4. Beta decay is demonstrated here. Option (g) is correct.

A proton can change into a neutron or vice versa inside the radioactive sample's nucleus through a process known as beta decay. The radioactive sample's nucleus can approach the ideal neutron/proton ratio as closely as feasible through processes like beta decay and alpha decay.

The nucleus releases a beta particle during this process, which can either be an electron or a positron. Keep in mind that a proton can become a neutron or a neutron can become a proton. To follow the law of charge conservation, electron and positron are created. The weak contact that leads to beta-decay.

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Due to gradient difference ir thermal image of the heated plate at a uniform temperature looks different in temperature scales

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we may estimate that the storm's effects will last for about 9.3 days.

We were informed that a wave is produced in the south pacific ocean. Additionally, these phrases produce waves that have a 15 m/s speed and can travel 12,000 kilometres. These waves, which are produced in the southern Pacific, can travel this far. Therefore, we simply utilise the standard equation that T equals distance times speed at the time of combat. Therefore, we must translate this distance into metres. Thus, 12,000 times 1000 is greater than 15. As Pete lacks seconds, the results are revealed. Thus, this can be expressed as eight times ten, increased to five seconds. So let's convert to our words first. Therefore, in terms of us, we will find that this equals to ours be 222 points. In order to determine the approximate number of days, we need to divide the amount by 24. 9.3 approximately Therefore, we may estimate that the storm's effects will last for about 9.3 days.

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