Question
A migrating bird can travel at a speed of 30 m/s. How far will it travel
in 25 minutes at this speed? Give your answer in metres (m), and in
kilometres (km).

The  SR-71 reconnaissance aircraft would take more time in order to reach the eastern boarder.

Let us recall that velocity is a vector quantity. This implies that velocity would have a magnitude as well as a direction. The magnitude of the velocity as well as its direction is important in this discussion.

We are told that An SR-71 reconnaissance aircraft, the world's fastest aircraft, is flying east at 3000 km/h through a crosswind of 300 km/h. On the other hand, we are also told that the the border lies along a straight north/south line. This is gong to inform the length of time that would be taken owing to the cross winds.

Given that the boarder is on a straight line, we can see that due to the crosswinds, the plane is mandated to use a cross oath which would take a longer time.

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Physics uses math because it allows us to calculate useful answers. Making option A the correct answer to the question.

Why do physics uses math?

Physics as a science subject taught in schools, requires a fundamental knowledge in Mathematics because the theories, the widely acceptable laws could be expressed based on Mathematical equations. Physics uses theoretical concepts and practical concepts.

In summary, from the question, physics uses math not because we want Physics to be as difficult as possible, but because explaining and understanding physical phenomenon requires a knowledge of mathematics.

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When 20 Coulomb of charge flows past a certain point in 5 seconds. The strength of an electric current will be (I)= 4A

When a battery is connected in a wire there is a electron flow from negative to positive portal. To maintain the value there is a flow which flows from positive to negative portal and help the light to glow that called the electric current. It can be measured in Ampere.

To calculate the electric current we are using the default formula of electric current that is, I=Q/t

Here we are given,

Q= The charge of the electric structure. = 20C.

t= The time being the current is flowing. = 5S.

We have to calculate the strength of an electric current= I

Now we put the values in the known equation, we get,

I=Q/t

Or, I=20/5

Or, I=4A

From the above calculation we can say that, the strength of an electric current will be (I)= 4A

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Answer:

1.3 Pa

Explanation:

from general gas equation

p1v1/TO =P2V2/T2

The amount of time it would take this physics student to reach the bottom of the slope is 15 seconds.

In order to determine the amount of time it would take this physics student to reach the bottom of the slope, we would apply the second equation of motion. Mathematically, the second equation of motion is given by:

S = ut + ½at²

Where:  

Making time, t the subject of formula, we have:

Time, t = 1/a[-u ± √(u² + 2aS)]

Substituting the given parameters into the formula, we have;

Time, t = 1/2.0 × [0 ± √(0² + 2 × 2.0 × 225)]

Time, t = 1/2.0 × [0 ± √(900)]

Time, t = 1/2.0 × [30]

Time, t = 15 seconds.

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During vegetative propagation, a new plant grows from parts of the parent plant.

During binary fission, a cell divides to produce a new genetically identical cell.

Asexual reproduction involves fission, budding, fragmentation, and parthenogenesis, whereas sexual reproduction is achieved by combining the germ cells of two individuals. The statement describing asexual reproduction is Offspring are born that have the same DNA as the parent.

Only one parent is needed to produce a child. Includes cell division similar to cell division in mitosis. Asexual reproduction is a form of reproduction in which the offspring produced are exactly like their parents. Also, there is no formation of two different gametes, nor the involvement of two different sexes. In unicellular organisms, mitosis is the mode of asexual reproduction.

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The horizontal component of the truck’s velocity is 24.45 m/s.

The horizontal velocity component (vₓ) describes the influence of the velocity in displacing the projectile horizontally.

The horizontal components of a velocity is the velocity of the object along the horizontal direction.

The horizontal component of the truck’s velocity is calculated as follows;

vₓ = v cosθ

where;

vₓ = 25 m/s  x  cos(12)

vₓ = 24.45 m/s

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A Chromebook is accelerated out a widow at 8m/s². The amount of  force was needed for this acceleration is (F)=10.88 N

When a object start with a velocity and end with other velocity, The difference of velocity divided by given time is called the acceleration. This is a vector quantity.

To calculate the force we are using the formula here is,

F=ma

Here we are given,

m= The mass of the Chromebook we know = 1.36 kg.

a = The acceleration of the object = 8 m/s².

We have to calculate the value of force = F

Now we put the values in the equation we get,

F=ma

Or, F = 1.36*8

Or, F=10.88N

From the above calculation we can say that, The amount of  force was needed for this acceleration is (F)=10.88 N

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Answer: The amount of force needed for the acceleration is F=10.88N

Explanation:

acceleration is the rate of change of velocity over time, both in terms of speed and direction. It is a vector quantity.

A mass-containing object's change in velocity is referred to as a force when a push or pull is applied to it. A body can change its state of rest or motion when an external force acts on it. It is directed and has a magnitude.

using formula, F=ma

where, F=force ; m=mass ; a= acceleration

given quantities are:

known mass(m) of Chromebook= 1.36kg

acceleration (a)= 8m/s²

on putting the values in the formula we get,

F=ma

F=1.36*8

F=10.88N

therefore amount of force needed for this acceleration of 8m/s² is 10.88N

It defines the direction in which the body or item is moving. In its basic form, speed is a scalar quantity. In essence, velocity is a vector quantity. It is the speed at which distance changes. It is the displacement change rate.

Speed is the rate of movement of an object along a path in time.

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The maximum angle theta to which the box of sand with embedded projectile swings is 20.7 degrees, and the energy lost after impact is 99.8%.

Given quantities:
QM(1)= 2oz = (2/16)lb
QM(2)= 50 lb

U= 2000 ft/sec
r= 6ft

Conservation of linear momentum:
G(1)=G(2)
m1v+m2(o)= (m1+m2)U^1
U^1 is the velocity of box and bullet immediately after impact
U^1= -m1v/(m1+m2)

After impact, conservation of total energy:
in U(1-2)=0, Tension does not work

= -1/2 (m1+m2)(U^1)^2 + (M1+M2)Qh= 0

- 1/2 (4.99 ft/sec)^2 + 32.2 ft/sec^2 6ft (1-cos theta)=0

{Theta= 20.7}

Energy lost in impact:
Final energy: (m1+m2)Qr (1-cos theta)= 19.248ft -lb

Initial energy: 1/2 mv^2= 7763.98 ft-lb
Energy loss: 7763.90- 19.248/7763.98 x 100%

= 99.8%

Therefore, the total percentage of energy lost after impact is 99.8% and the value of theta is 20.7 degrees.

Given complete question:

The ballistic pendulum is a simple device to measure prohectile velocity v by observing the maximum angle theta to which the box of sand with embedded projectile swings. Calculate the angle theta if the 2-oz projectile is fired horizontally into the suspended 50lb box of sand with a velocity v = 2000ft/sec. Also find the percentage of energy lost during impact.

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Wave crest is the highest part of a progressive wave above average water level This statement is True.

The valley between wave crests that are lower than the average water level is known as the wave trough. Wave length is the distance horizontally between two troughs, whereas wave height is the vertical distance between a wave crest and the adjacent troughs.

The top of the waves is called as the crest. The lowest point is called the trough. The storm surge is the highest - end change in elevation between both the crest and the trough, whereas the wave length, often known as the wavelength, is the distance between two consecutive crests (or troughs).

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The power used is 2W.

Power is used to describe the rate at which energy is consumed. In other words, it's a measure of how quickly you're using energy. Whether you're running up a flight of stairs in 5 seconds or slowly climbing the same flight of stairs in 40 seconds, you'll get the same amount of work done. Globally we get most of our energy from oil followed by coal gas and hydropower.

It turns out that the work done is equal to the force or the component of the force in the direction of displacement times the displacement. So the force here is due to a gravitational acceleration of 5g g=9.8ms^-2 and a displacement of 5 meters. So the work done equals 245J. Power comes from the Latin word potere which means can. But those with power go far beyond their capabilities - they can wield a lot of power.

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Answer:

a way in which something is usually done, especially within a particular area or activity."the woman who overturned so many conventions of children's literature"

OR. 

an agreement between countries covering particular matters, especially one less formal than a treaty."the convention, signed by the six states bordering on the Black Sea, aims to prevent further pollution"

Explanation: Depends on what your using it for. Similar words:

agreement /

accord /

protocol /

compact /

pact /

treaty /

concordat

Answer:

Initial velocity, u = 600km/h 

Final velocity, v = 1100km/h

Acceleration = 10km/h/s=600km/h2

From relation, 

a=t(v−u)

t=a(v−u)

t=600(1100−600)

=500/600=5/6 hr=50 sec

If a man walks south on the sidewalk at a speed of 0.8 m/s, then it would take him 14.3 seconds to travel 10 m relative to a stationary observer, therefore the correct answer is option A.

The total displacement covered by any object per unit of time is known as velocity. It depends on the magnitude as well as the direction of the moving object.

As given in the problem A moving sidewalk has a velocity of 1.5 m/s north. If a man walks south on the sidewalk at a speed of 0.8 m/s,

The relative velocity the man  = 1.5 - 0.8

                                                  =0.7

The time is taken by him  to travel 10 m relative to a stationary observer,

Time = 10 / 0.7

        =14.3 seconds

Thus,it would take him 14.3 seconds to travel 10 m relative to a stationary observer, therefore the correct answer is option A.

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A roller coaster starts at the top of a hill at v₁ =0m/s at a time of t₁=0/s . When it reaches the bottom of the hill at t₂=6/s it has a velocity of v₂=36m/s. The roller coaster’s acceleration is 6m/s²

Acceleration is a physics term that means how much the object change its velocity within a given time. It is a vector quantity. It can be measured in m/s², Cm/s².

To calculate the roller coaster’s acceleration we have to use the formula here is,

a=(v₂-v₁)/(t₂- t₁)

Here we are given,

t₁= The initial time of the roller coaster = 0 s

t₂=The final time of the roller coaster = 6 s

v₁ = The initial velocity of the roller coaster= 0m/s

v₂=The final velocity of the roller coaster = 36 m/s

We have to calculate the acceleration of the roller coaster  = a m/s²

Now we put the values in the above equation,

a = (36-0)/(6-0)

Or, a=36/6

Or, a= 6m/s²

According to the calculation, The roller coaster’s acceleration is 6m/s²

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The impedance of the circuit having a resistor of resistance 40Ω and a capacitor of capacitance 132.6F is 2.65Ω

The potential of the circuit = 120 V

The frequency of the circuit = 60 Hz

The capacitance of the capacitor = 132.6 F

The resistance of the resistor = 40Ω

The impedance of this circuit can be found using the formula

                           Z = R / (RωC + 1)

where Z is the impedance

          R is the resistance of the resistor

          C is the capacitance of the capacitor

          ω is the angular frequency

First, let us find the angular frequency
                         

                     ω = 1/2πf

where f is the frequency

                     ω = 1/ 2 x 3.14 x 60

                         = 1 / 376.8

                         = 0.00265

So, let us substitute the known values in the impedance formula, we get

                      Z = 40 / ( 40 x 0.00265 x 132.6 +1)

                         = 40 / (14.05 +1)

                         = 40 / 15.05

                        = 2.65Ω

Therefore, the impedance of the circuit is 2.65Ω

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The kinetic energy of the object with a mass of 4 kilograms which was lifted at a rate of 10 m/sec was greater than the kinetic energy of the object that had a mass of 2 kilograms and was lifted at a speed of 2m/sec.

The kinetic energy of an object is the energy that an object has due to its motion.

The kinetic energy of a body is given mathematically as follows:

Kinetic energy = ¹/₂ * mass * velocity²

The kinetic energy of the objects is as follows:

Object 1; mass = 2 kilograms, speed = 2m/s

Kinetic energy =  ¹/₂ * 2 * 2²

Kinetic energy = 4 J

Object 2; mass = 4 kilograms, speed = 10 m/s

Kinetic energy = ¹/₂ * 4 * 10²

Kinetic energy = 200 N

Comparing the kinetic energy of the two objects, it can be seen that the kinetic energy of Object 2 was far greater than the kinetic energy of Object One.

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Changing the volume of something like flattening a ball of aluminum foil into the shape of a boat change its density because has a smaller volume compared to its mass.

As folded piece of aluminum is closer to that of a solid piece of aluminum, therefore It has a smaller volume compared to its mass. As it is folded, atoms of aluminum are forced to be compacted together. Hence, it's density is higher and greater than 1.

Objects react quite differently in water because of their density. Aluminum foil ball has more density because its pennies are crowded into a smaller space than in the foil boat. The foil boat has lesser density because it is spread out and filled with air.

Density is used to measure how heavy something is as compared to its size. If an object has density more than water then it will sink when placed in water and if density is less than water then it will float. Density is that property of a substance that doesn't depend on the amount.

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Answer:true

Explanation:i just took the test

Answer:

Explanation: We need to find the equivalent of the given imaginary number with 22 power:

Using exponent properties, we can rearrange this as:

Answer: What do you need help with?

Explanation: I'm afraid nobody can help you if they don't know how to help you.

To enter orbit, a spacecraft leaving the Earth's surface must travel at least 11 kilometers (7 miles) per second, or more than 40,000 kilometers per hour (25,000 miles per hour). One of the most difficult challenges in space travel is achieving escape velocity.

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The magnitude of work input during this process is - 73.62 kJ

It is Given that

In a gas-tight, friction-free piston cylinder, 1.5 kg of air at 120 kPa and 24 °C is housed. This final pressure of 600 kPa is reached for the air. Heat is transferred from the air during the procedure, maintaining a consistent temperature inside the cylinder.

We have to Calculate the work input during this process.

Assuming air is an ideal gas at constant temperature, the ideal gas equation will be

P = mRT/V

Now mRT is constant at constant temperature, the equation for work will be V2

W = ∫ path P dv

= v1 ∫v1 to v2 mRT / Vdv

= ∫ v1 to v2 dV/V

= mRT (log V) v1 to v2

= mRT (log V2/V1)

We need to find V2/V1 for constant temperature

So V2/V1 mRT / P2/mRT/P1

V2/V1 mRT / P2/mRT/P1 = P1/ P2

Substituting P1/P2 in V2/V1 using gas constant for air = 0.2870,

So m = 1.5 kg

T = 24 degree Celsius = 285.15 K

So W = mRT log(P1/P2)

= 1.5 kg x 0.2870 kJ/kg K x 285.15 K log (120 kpa / 600 kpa)

= - 73.62 kJ

The negative sign implies that it is a work input of - 73.62 KJ

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A ball of mass 0.3 kg, initially at rest, is kicked directly toward a fence from a point 16m away. The velocity of the ball as it leaves the kicker's foot is 16 m/s at an angle of 48 degrees above the horizontal. The top of the fence is 3 m high. The ball hits nothing while in flight and air resistance is negligible. The acceleration due to gravity is 9.8 meters per second square.

a) The time it takes for the ball to reach the plane of the fence is (t)= 1.49 s

b) The ball pass above the top of the fence will be (h)=3.81m

c) The vertical component of the velocity when the ball reaches the plane of the fence is [v(y)]= -2.71 m/s

The term velocity means that the object's covered distance within the given time. Example: A car goes 3m in 1 second the velocity of the car is 3m/s.

a) To calculate the time we are using the formula,

x=vcosθt

Or, t = x/ vcosθ

Here we are given,

v= the initial velocity of the ball =16 m/s

θ =  the initial angle = 48°

x= The distance of the fence = 16m

W have to calculate the time =t

Now we put the values in the above equation we get,

t = x/ vcosθ

Or, t= 16/16*cos48°

Or, t = 1.49 S

Now we know that, the time it takes for the ball to reach the plane of the fence is (t)=1.49 s

b) Now we have to calculate the height of the ball when it cross the fence. we are using the formula,

y= vsinθt-(1/2)gt²

t =  the time we got earlier = 1.49 s

g= The acceleration due to gravity = 9.8 m/s².

Now we put the values in the above equation we get,

y= vsinθt-(1/2)gt²

Or, y = 16*sin48*1.49-(1/2)*9.8*(1.49)²

Or, y= 6.81 m

The  ball pass above the top of the fence will be (h)=(y-y₁)=(6.81-3)=3.81m

c) To calculate the vertical component of the velocity when the ball reaches the plane of the fence, we are using the formula,

v(y)=vsinθ-gt

Or, v(y)=16*sin48-9.8*1.49

Or, v(y)= -2.71 m/s

From the calculation we assure, The vertical component of the velocity when the ball reaches the plane of the fence is [v(y)]= -2.71 m/s.

[Note: The component is negative cause the velocity is decreasing]

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A ball of mass 0.3 kg, initially at rest, is kicked directly toward a fence from a point 16m away. The velocity of the ball as it leaves the kicker's foot is 16 m/s at an angle of 48 degrees above the horizontal. The top of the fence is 3 m high. The ball hits nothing while in flight and air resistance is negligible. The acceleration due to gravity is 9.8 meters per second squared.

a) Determine the time it takes for the ball to reach the plane of the fence.

b) How far above the top of the fence will the ball pass? Consider the diameter of the ball to be negligible.

c) What is the vertical component of the velocity when the ball reaches the plane of the fence?

The ball's speed and direction are 3.1 m/s at its lowest point in its trajectory, and it swings to the other side at the same angle.

We are given that,

The weight of the ball = m = 500g

The height of the string = h = 41.0 cm

The pendulum is pulled at the angle of = θ = 25.0°

At the lowest point, we'll suppose that 100% of the motion will convert to kinetic energy. Now, the height difference will be,

Δh = (41.0cm– 41.0cos 2.5°) = 0.41cm

The change in potential difference is given as,

ΔP.E = mgΔh

ΔP.E = 9.8m/s² × 0.50kg × 0.0041 m

ΔP.E = 0.02009J

Then the kinetic energy of the pendulum is given by,

K.E = (1/2)mv²

Therefore , from the law of conservation the potential energy is equal to the kinetic energy of the pendulum and putting the values from the above i.e.

P.E = K.E

P.E = (1/2)(0.50kg)(v²)

v² = (0.02009J)/(0.5)(0.50kg)

v² = 0.08036m/s

v = 0.2834 m/s

Thus the speed of the pendulum would be 0.2834m/s.

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Answer:

1.2 m/s^2

Explanation:

F = m a

42000 = 35000 * a

a = 42000 / 35000 = 1.2 m/s^2

The time submarine passes a marker that is 125 km from shore is 3.87 hr.

Speed is the directional velocity of an object in motion as a demonstration of its price of alternate in function as discovered from a particular frame of reference and as measured by way of a specific preferred time.

velocity is the top indicator of the placement in addition to the rapidity of the item. it may be described as the distance protected by way of an item in unit time. velocity may be defined as the displacement of the item in unit time.

velocity is the quickness of movement or movement. A synonym is a celerity; a less difficult phrase is pace. In physics, pace especially refers to the dimension of the price and route of an alternate in the function of an item.

calculation:-

velocity = displacement/time

             = 290 / 9

              = 32.22 km/hr

new distance = 125 km

velocity is constant = 32.22 km/hr

time = displacement/velocity

        = 125/32.22

         = 3.87 hr

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