A substance that is easily magnetized is a

Answer:

The correct answer is c. More total rainfall from a slower moving storm.

When the the forward speed of the hurricanes and tropical storms slows down they tend to increase the rainfall. Because of the slow movement the storm can be for few days over a given region and produce rainfall without stopping, thus create major flooding, pilling up of the coastal water, and produce persistent strong winds even though they have decreased in their forward speed.

Explanation:

Answer:

Explanation:

Choices for this question are

a. Less flooding because rain will have more time to soak into the ground.

b. Less total rainfall from a weakening system.

c. More total rainfall from a slower moving storm.

d. Shorter period under the rainbands.

When hurricane's forward speed decreases, they will last more time, because their energy is gonna last more. This means that the rainfall will also last more days. Even-though, slower hurricanes tend to last more time because of this, so, the chances of happening floods is higher, because the rainfall will continue for more days.

Answer:

Zero

Explanation:

The work done by a force on an object is given by:

[tex]W=Fd cos \theta[/tex]

where

F is the magnitude of the force

d is the displacement of the object

[tex]\theta[/tex] is the angle between the direction of the force and the displacement of the object

In this situation, the force is the force of gravity acting on the satellite. This force always points towards the centre of the trajectory, so it is always perpendicular to the direction of motion of the satellite (since the orbit is circular), so [tex]\theta=90^{\circ}[/tex] and [tex]cos \theta =0[/tex]. Therefore, the work done by gravity is also zero.

Answer:

zero

Explanation:

on edg.

OPTION 3.

In a circuit, when identical lights are connected in series, they have the same current and burn with the same brightness. Similarly, when identical lights are connected in parallel, they each have the same voltage and burn with the same brightness. Therefore, all 13 lights in the given arrangement will burn with the same brightness.

In electrical circuits, when identical lights are connected in series, they all have the same current through them and therefore they all burn with the same brightness. On the other hand, when identical lights are connected in parallel, they share the total voltage (thus each having the same voltage as if it were alone) and they also burn with the same brightness. Therefore, in this case where there are 11 lights in series, and they are in series with 2 lights in parallel, and all 13 are identical, all of them will burn with equivalent brightness. Thus the option 'all 13 lights' is the correct answer.

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Considering the properties of series and parallel circuits and given all 13 lights are identical, they will all shine with the same brightness. Therefore, none of the lights will burn the brightest.

In a series circuit, the electrical current is the same through all the components, which in this case are the lights. Therefore, since the 11 lights are in series and have the same current, they will all shine with the same brightness. However, these 11 lights are in series with 2 in parallel. In parallel circuits, the voltage across each component (here, the lights) is the same. So, the 2 lights in parallel will also shine with the same brightness. Because all 13 lights are identical and considering how series and parallel circuits work, all will have the same brightness. Therefore, none of the options will burn the brightest.

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Answer:

C. Recheck the numbers of each atom on each side of the equation

to make sure the sides are equal.

D. Choose coefficients that will balance the equation

Explanation:

In balancing of chemical equation, the number of atoms on both sides must be equal in adherence to the law of conservation of mass.

Using the method of inspection, the equation is first observed to know the relationship between the combining atoms and the resulting ones.

After observing the reaction, put a coefficient that will balance the equation. Then recheck the number of each atom on both side of the equation. One can repeat the process till the equation is balanced.

The steps of balancing a chemical equation include rechecking the numbers of each atom and choosing coefficients that will balance the equation. Options A and B are not part of the balancing process.

To balance a chemical equation, you normally adhere to a few critical steps. These do not include options A and B. You should not multiply reactants to get products, and you shouldn't change subscripts, which would alter the nature of the substances involved. You should,

Balancing chemical equations aims to observe the law of conservation of mass, which states that matter can neither be created nor destroyed.

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Explanation:

According to Bernoulli's principle:

"In an ideal fluid (not viscous and without friction) that circulates through a closed conduit, the energy the fluid possesses remains constant along its path."

From there, Bernoulli deduced that the fluid pressure decreases when the flow rate increases. And this has nothing to do with depth.

To understand it better:

In a fluid that circulates through a closed conduit (a pipe for example), it contains energy in two ways:

-Kinetic energy due to its weight and speed.

-Potential energy in the form of pressure.

Now, if the system has constant flow and the total energy (kinetic + potential) is also constant, the energy is transformed every time the transverse area of ​​the tube is modified.

It should be noted that by modifying this transverse area, the flow rate is also modified.

Therefore, as the kinetic energy increases or decreases, this change is compensated by the decrease or increase in pressure (potential energy), since the total energy of the system cannot be created or destroyed.

Answer:

a)-M2/M1

Explanation:

Momentum is conserved:

M₁ v₁ + M₂ v₂ = 0

M₁ v₁ = -M₂ v₂

v₁ / v₂ = -M₂ / M₁

In the given physical scenario, by adhering to the conservation of momentum, you can find the ratio of the speeds v1/v2 which is represented by -M2/M1.

From the conservation of momentum, we might deduce that the total momentum of a system of particles is constant if there is no resultant external force. Before the explosion, the body was at rest, indicating that its total momentum was zero. After the explosion, the total momentum should still be zero. Hence, the momentum of M1 moving at speed v1 should be equal but opposite to the momentum of M2 moving at speed v2. This is represented mathematically as M1*v1 = M2*v2. By rearranging this equation, we can find the ratio v1/v2 which equals -M2/M1.

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Answer:

C. when the distance between them becomes extremely large

Explanation:

The gravitational force between two masses is:

F = GMm / r²

where G is the universal constant of gravitation,

M and m are the masses of the objects,

and r is the distance between the objects.

As r grows very large, F grows very small.

Answer:

v

Explanation:

Answer:

B. 0.1 meters/second/second in the same direction of travel.

Explanation:

Acceleration is the rate of change of velocity. Acceleration is a vector quantity.

a=Δv/Δt

=(v₂-v₁)/(t₂-t₁)

v₁=4 m/s

v₂=6 m/s

t₁=0 s

t₂=20 s

a=(6m/s-4m/s)/(20s-0)

= 0.1 m/s² in the same direction of travel.

Therefore acceleration =0.1 meters/second/second in the same direction of travel.

The acceleration of runner is [tex]\bold{0.1 \ m / s^{2}}[/tex] if his initial velocity is 4 m⁄s and after 20 seconds the runner's velocity is 6 m⁄s.

Option: B

From given we came to know that the runner starts his initial velocity is 4  , and in 20 s speeds up to 6 m⁄s, to find acceleration of runner, we know that acceleration is ratio of change in velocity to change in time.

The acceleration is given by the formula:

[tex]\text { Acceleration }=\frac{\text { Change in velocity }}{\text { Change in time }}[/tex]

We know that change in velocity as 4 m/s to 6 m/s and change time as 20 s.

[tex]\Rightarrow \text { Acceleration }=\frac{6-4}{20}[/tex]

[tex]\therefore \text { Acceleration }=0.1 \ \mathrm{m} / \mathrm{s}^{2}[/tex]

Therefore, acceleration of runner will be [tex]0.1 \ m / s^{2}[/tex]

Answer:

[tex]\begin{array}{l|l}\text{Speed}\; \mathrm{(m\cdot s^{-1})} & \text{Minimum Height\;(m)}\\\cline{1-2}\\[-1em] 2 & 0.204\\3&0.459\\4 & 0.815\\5 & 1.27 \\6 & 1.83\end{array}[/tex].

Assumptions:

Explanation:

Consider the "SUVAT" equation

[tex]\displaystyle \frac{v^{2} - u^{2}}{2a} = x[/tex],

where

For example, if the bottle needs to achieve a speed of [tex]v = \rm 2\; m\cdot s^{-1}[/tex] by the time it reaches the ground,

Apply the previous equation to find the minimum height, [tex]x[/tex]:

[tex]\displaystyle x = \frac{v^{2} - u^{2}}{2a} = \rm \frac{\left(2\; m\cdot s^{-1}\right)^{2}}{2\times 9.81\; m\cdot s^{-2}} \approx 0.204\; m[/tex].

Replace the [tex]v[/tex] value and apply the formula to find the minimum height required to reach different final speeds.

Answer:

0.20

0.46

0.82

1.28

1.84

Explanation:

To achieve a speed of 2,3,4,5,6 m/s, the bottle must be

Answer:

(i) 20 m/s

(ii) 0.00625 m/s²

(iii) 25 m/s

Explanation:

(i) The train moves at constant speed when it has no acceleration, meaning when the sum of the forces is zero.

There are two forces acting on the train.  The force of the engine pushing the train forward, and the resistance.

∑F = ma

F − R = 0

F = R

The resistance is:

50 N/tonne × (100 tonne + 25 tonne) = 6250 N

Therefore, the force of the engine is 6250 N.  The power of the engine is 125 kW.  Power is work per time, and work is force times distance, so:

P = W / t

P = Fd / t

P = Fv

125000 Nm/s = (6250 N) v

v = 20 m/s

(ii) The truck becomes uncoupled.  The engine is still pushing with 6250 N of force, but the resistance has changed to:

50 N/ton × 100 tonne = 5000 N

∑F = ma

F − R = ma

6250 N − 5000 N = (100 tonne × 2000 kg/tonne) a

a = 0.00625 m/s²

(iii) When the force of the engine matches the new resistance force:

P = Fv

125000 Nm/s = (5000 N) v

v = 25 m/s

The train's constant speed is 20 m/s. The acceleration of the shunter after the truck is uncoupled is 0.0125 m/s^2. The greatest speed the shunter can achieve, ignoring other physical limits, is 25 m/s.

Calculating Constant Speed, Acceleration, and Maximum Speed of a Shunter

Calculating constant speed: The total resistance to motion for both the diesel shunter and the truck is equal to the resistance force per tonne multiplied by the total mass. This gives a total resistance of (100+25) tonnes  imes 50 N/tonne = 6250 N. Since the train is traveling at a constant speed, the power output of the engine is equal to the force times velocity (P = Fv), so the velocity v = P/F = 125000 W / 6250 N = 20 m/s.

Calculating the acceleration of the shunter: After the truck becomes uncoupled, the shunter's mass is 100 tonnes. The resistance force is now 100 tonnes * 50 N/tonne = 5000 N. The power output remains the same, so the available force for acceleration is P/v - resistance = 125000 W / 20 m/s - 5000 N = 1250 N. Acceleration a = F/m = 1250 N / (100  imes 1000 kg) = 0.0125 m/s2.

Finding the greatest speed of the shunter: Assuming there is no upper limit imposed by engine power or other factors, the greatest speed would be when the force output from power equals the resistance force: P/v = resistance. Therefore, maximum speed v = P / resistance = 125000 W / 5000 N = 25 m/s. However, in real-world scenarios, factors like engine capacity and gear ratios would limit the maximum speed.

Answer:

(D) V > V' > 1/2 V

Explanation:

When B₂ is in the circuit, the equivalent resistance is:

Req = R + (1/R + 1/2R)^-1

Req = R + 2/3 R

Req = 5/3 R

So the current in B₁ is:

I = V/R

I = V₀ / (5/3 R)

I = 3/5 V₀/R

Therefore, the reading of V₁ is:

V = IR

V₁ = (3/5 V₀/R) R

V₁ = 3/5 V₀

V₁ = 0.6 V₀

After B₂ is removed, the equivalent resistance is:

Req = 3 R

So the current in B₁ is:

I = V/R

I = V₀ / (3 R)

I = 1/3 V₀/R

Therefore, the new reading V₁' is:

V = IR

V₁' = (1/3 V₀/R) R

V₁' = 1/3 V₀

V₁' = 0.333 V₀

The new voltage is less than the original voltage, but more than half the original voltage.  The answer is D.

[tex]12.75 \frac{m}{s}[/tex]

Assuming vertical acceleration of [tex]9.81 \frac{m}{s^2}[/tex], the speed after x seconds of falling is [tex]9.81x \to 9.81(1.3) = 12.75[/tex]

Answer:

D) the frictional force between the bike and sidewalk stays the same because speed does not affect frictional force

Explanation:

Friction force is equal to normal force times the coefficient of friction.  Since neither of those changes as speed increases, then the friction force stays the same.

Answer:

Breeder reactors are different from conventional nuclear reactors because they produce more fuel than they consume when producing energy and can re-use the plutonium they produce to fuel the reactor.

Explanation:

Nuclear reactors use uranium as a source of fuel to generate the required energy.These reactors produce less fissionable matter than they consume.For example, the amount of plutonium produced in nuclear rectors is less than that produced in Breeder reactors.In Breeder reactors, the plutonium produced can be separated and collected to be reused as fuel in the reactor.Additionally, breeder reactors use a coolant such as liquid sodium equipping the neutrons with high energy thus increasing the chances  of the neutrons to be captured by uranium isotopes and be converted to plutonium.

Answer:

The type of wire

Explanation:

E=Blv

Answer:

The type of wire

Explanation:

The EMF is induced in the closed conducting loop whenever there is a change in the magnetic flux linked with it. Mathematically, it is given by :

[tex]\epsilon=\dfrac{-d\phi}{dt}[/tex]

Where

[tex]\phi[/tex] is the magnetic flux

[tex]\phi=B.A[/tex]          

[tex]\epsilon=\dfrac{-d(BA)}{dt}[/tex]

For n number of coils,

[tex]\epsilon=\dfrac{-d(NBA)}{dt}[/tex]

Where

B is the magnetic field

A is the area of the coil

If the coil is moved with the speed of v in the magnetic field, then induced EMF is given by :

[tex]\epsilon=Blv[/tex]

l is the length of the coil

So, the induced EMF depends on the following factors:

So, the type of wire do not change the induced emf of the coil. Hence, the correct option is (b).

The ball will continue moving at this same speed as long as no external forces act upon it because it’s inertia will allow it to continue moving at a constant velocity. So, option D is correct.

Inertia of an object is defined as the tendency of the object to continue its state of rest or uniform motion.

Here,

The ball is moving along a frictionless surface with a speed of 5 m/h.

This motion of the ball will be continued as long as no external force acts on it. This is because,

According to Newton's first law, a moving body will continue its state of uniform motion unless it is acted upon by an external force. So, an external force like a push or pull is required to change the speed of the ball as well as to change the direction of motion of the ball. Therefore the ball will continue its motion with the same speed and direction due to its property of inertia of motion.

Hence,

The ball will continue moving at this same speed as long as no external forces act upon it because it’s inertia will allow it to continue moving at a constant velocity.

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Final answer:

A ball on a frictionless surface will maintain its speed of 5 mi/h due to inertia and balanced forces, meaning no additional force is required to keep it in motion. Statements B and D accurately describe this scenario according to Newton's laws of motion.

Explanation:

A ball moving at a speed of 5 mi/h along a frictionless surface will continue moving at this speed if certain conditions are met. According to physics principles, particularly Newton's laws of motion, an object in motion will stay in motion at a constant speed in a straight line unless acted upon by a net force. Therefore, the correct answers are:

Both statements B and D are true because in the absence of external forces, such as friction, the ball's inertia will keep it moving indefinitely at the same speed and in the same direction. No additional force is needed to maintain its motion; on the contrary, it requires a force to change its state of motion as stipulated by the law of inertia.

Answer:

Unknown

Explanation:

Because we cannot observe space beyond the edge of the observable universe, it is unknown whether the size of the Universe in its totality is finite or infinite.

The given statement is true, that is, the universe is endless due to the fact that it is not limited with a specified boundary.

Explanation:

Universe has unimaginable length and width due to the limit of the present day science and technological adaptation because of which we haven’t explored the full universe yet. The world in which we live is the Earth which has been cartographed and studied well along with the Milky Way galaxies.  

But beyond this, there are thousands and millions of galaxies which has not been studied. Then there is a frame of reference of study with the dimensional frame where we have been adept to 3 dimensions only and the [tex]4^{th}[/tex] dimension is yet to be studied.

Answer:

C. 1.4 m/s² right

Explanation:

Apply Newton's second law.  Take right to be positive and left to be negative:

∑F = ma

175 N − 100 N = (55 kg) a

a = 1.4 m/s²

The couch accelerates to the right at 1.4 m/s².

To find the acceleration of the couch, use Newton's second law of motion, which states that the net force acting on an object is equal to the mass of the object multiplied by its acceleration. The net force is calculated by subtracting the forces applied by the two individuals pushing in opposite directions. By plugging in the given values and solving the equation, the acceleration of the couch is found to be approximately 1.4 m/s² to the right.

To find the acceleration of the couch, we need to use Newton's second law of motion, which states that the net force acting on an object is equal to the mass of the object multiplied by its acceleration. In this case, the net force is the difference between the forces applied by Dale and Alex, since they are pushing in opposite directions.

The net force can be calculated as 175 N (force applied by Alex) minus 100 N (force applied by Dale), which equals 75 N. The mass of the couch is given as 55 kg. Plugging these values into the equation, we get:

Net force = mass × acceleration

75 N = 55 kg × acceleration

Dividing both sides of the equation by 55 kg gives us:

acceleration = 75 N ÷ 55 kg ≈ 1.4 m/s²

Since the net force is positive (to the right) and greater than zero, the acceleration of the couch is also to the right. Therefore, the correct answer is 1.4 m/s² right (option C).

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if it is a displacement time graph, It will increase upwards in a straight line.

If it is a velocity time graph it will remain as a straight horizontal line

If it is an acceleration time graph there will be a horizontal straight line at 0

Explanation:

According to Newton's third law of motion, when two bodies interact between them, appear equal forces and opposite senses in each of them.

To understand it better:

Each time a body or object exerts a force on a second body or object, it (the second body) will exert a force of equal magnitude and direction but in the opposite direction on the first.

So, if the rich man had pushed the bag of money horizontally opposite of where he was, he could have saved himself.

Answer:

Both A and D

Explanation:

Vector magnintude contains both speed and direction and so do these answer choices of 15km and 30m/s

Answer:

A and D

Explanation:

A vector magnitude has a magnitude and a direction Then 15 km are a magnitude that could have a direction for example 15 km in north direction.

The same happends with 30 m/s its a magnitude that could have a direction.

In the case of the option B 25 mililiters is a scalar magnitude because is a volumen then we can not define a direction, and the same for the option C 15 hours.

Answer: B

Explanation:

Answer:B

Explanation:

The frictional force between two sliding objects is given by:

F = μN

μ is the coefficient of kinetic friction, N is the normal force one object exerts on the other.

These are the two factors that influence the frictional force, the coefficient of friction and the normal force that the objects exert on each other.

The strength of the force of friction between two sliding objects is determined by the type of surfaces in contact and the normal force.

The strength of the force of friction between two sliding objects is determined by two factors:

For example, if two objects with rough surfaces are in contact and the normal force between them is large, the frictional force will be strong. Conversely, if the surfaces are smooth and the normal force is small, the frictional force will be weak.

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Answer:

83%

Explanation:

On the surface, the weight is:

W = GMm / R²

where G is the gravitational constant, M is the mass of the Earth, m is the mass of the shuttle, and R is the radius of the Earth.

In orbit, the weight is:

w = GMm / (R+h)²

where h is the height of the shuttle above the surface of the Earth.

The ratio is:

w/W = R² / (R+h)²

w/W = (R / (R+h))²

Given that R = 6.4×10⁶ m and h = 6.3×10⁵ m:

w/W = (6.4×10⁶ / 7.03×10⁶)²

w/W = 0.83

The shuttle in orbit retains 83% of its weight on Earth.

The correct option is c) 83%.

Given :

A shuttle on Earth has a mass of [tex]4.5\times 10^5[/tex] kg.

Shuttle is at height of [tex]6.3\times 10^5[/tex] meters above the surface of the Earth.

Solution :

On the surface of Earth, the weight is

[tex]\rm W = \dfrac{GMm}{R^2}[/tex]  ---- (1)

Where,

G is the gravitational constant,

M is the mass of the Earth,

m is the mass of the shuttle,

R is the radius of the Earth.

In orbit the weight is,

[tex]\rm w = \dfrac{GMm}{(R+h)^2}[/tex]  ----- (2)

Now we take the ratio of equation (2) to (1),

[tex]\rm \dfrac{w}{W}= \dfrac{R^2}{(R+h)^2}[/tex]   ----- (3)

Now put the values of R and h in equation (3) we get,

[tex]\rm \dfrac{w}{W} = 0.83[/tex]

= 83%

Therefore, the correct option is c) 83%

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Answer:

heat is not absorbed by the system

A rapid shift occurs between gas compression and expansion.

All heat is transformed to work done by the system.

Explanation:

Adiabatic processes involve no heat transfer to or from the system, often due to the insulation or speed of the process. Temperature decreases during expansion because internal energy does work, and increases during compression as work is done on the system. So the correct options are second, third, and fourth statements.

An adiabatic process describes a thermodynamic change in which no heat is transferred into or out of the system. This can mean that the system is well insulated or that the process happens so quickly there's no time for heat transfer. During adiabatic expansion of a gas, the temperature decreases because internal energy is converted to work done by the system, and in adiabatic compression, the temperature increases because work is done on the system, increasing its internal energy.

All heat being transformed to work done by the system can be a characteristic of an adiabatic process, particularly in the case of an ideal adiabatic process where no heat is exchanged and all energy changes in the system are due to work.

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Answer:

Sleeping, since your brain is working, but your physical body is not moving at all or moving rarely, therefore there is no work done in the activity of sleeping.

Explanation:

Mechanical weathering is the physical breakdown of rock by environmental factors. This process is always at work, and there are a number of different types of mechanical weathering. Thermal expansion is the tendency for minerals to expand and contract based on temperature.

Answer:Mechanical weathering is actually breaking down of rocks into smaller pieces by natural forces. Any weathering processes that can cause the physical breakdown of rocks without any type of change in the chemical composition of rocks, called mechanical weathering.

Exfoliation: It's a process where the rocks erodes by peeling off in sheets or layer by layer rather than grain by grain.

Explanation:therefore exfoliation will match the answer to your question

Answer:

a. the brick's volume was 0.96 liters.

Explanation:

A brick is denser than water, so it sinks.  So the volume of water the brick displaces is equal to the brick's total volume.

Volume is a three-dimensional scalar quantity. The water displaced by the brick had a volume of 0.96 liters, which tells that the brick's volume was 0.96 liters. The correct option is A.

A volume is a scalar number that expresses the amount of three-dimensional space enclosed by a closed surface.

As it is known that volume occupies space, now, if the brick is put in water and it takes the place of water, therefore, the volume of the brick will be the same as the volume displaced by it.

Hence, The water displaced by the brick had a volume of 0.96 liters, which tells that the brick's volume was 0.96 liters.

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Answer:

365 m/s

Explanation:

The velocity of sound in air is approximated as:

v ≈ 331.4 + 0.6 T

where v is the velocity in m/s and T is the temperature in Celsius.

At T = 56:

v ≈ 331.4 + 0.6 (56)

v ≈ 365.0

The velocity is approximately 365 m/s.

Final answer:

The speed of sound in air at 56°C is approximately 364.6 m/s, calculated using the temperature-dependent formula for the speed of sound.

Explanation:

The speed of sound in the air increases as the temperature rises. At 0°C, the speed of sound is about 331 m/s. The speed of sound can be approximated using the formula:

v = v0 + (0.6 × t)

Where:

At a temperature of 56°C, the speed of sound can be calculated as follows:

v = 331 m/s + (0.6 m/s/°C × 56°C)

v = 331 m/s + 33.6 m/s

v = 364.6 m/s

Thus, the speed of sound in air at 56°C is approximately 364.6 m/s.