If the distance between us and a star is doubled, with everything else remaining the same, the luminosity.

Answer:

candle for chemical energy.

Loudspeakers are the best example of electrical energy to sound energy conversion

Explanation:

Answer:

See below

Explanation:

The half life is 12 year, so after 12 years HALF Of the sample will be gone and half will be left

1/2   *   1 x 10^16  =   .5 x 10^16   = 5 x 10^15 nuclei

a)It is possible for the magnetic force on a charge moving in a magnetic field to be zero. The force acting on the charge is zero when a charge is moving in the same or opposite direction of the magnetic field.  When a is charge moving parallel in the same direction of the magnetic field, then the magnetic force  is zero.

b)It is not possible for the electric force on a charge moving in an electric field to be zero. If there's a charged particle in a magnetic field, it's impossible for this force to become zero.

c)It is not possible for the resultant of the electric and magnetic forces on a charge moving simultaneously through both fields to be zero. The magnetic force can be zero but the electric force cannot be zero because it is not affected by the motion of the particles.

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The acceleration of an unwary football player during uniform motion is 21.675 m/s² with a positive direction.

We need to know about the uniform motion to solve this problem. The uniform motion is an object's motion under acceleration. It should follow the rule

vt = vo + a . t

vt² = vo² + 2a . s

s = vo . t + 1/2 . a . t²

where vt is final velocity, vo is initial velocity, a is acceleration, t is time and s is displacement.

From the question above, we know that

vo = 5.1 m/s

s = 0.6 m

vt = 0 m/s

By substituting the given parameters, we can calculate the acceleration

vt² = vo² + 2a . s

0² = 5.1² + 2a . 0.6

1.2a = - 26.01

a = 21.675 m/s²

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Option c is the right solution. This shows that it has gone beyond the threshold when the difference is immediately noticeable.

The lowest kinetic energy that two moving particles must have when they collide is known as the threshold energy in particle physics. Always larger than or equal to the desired particle's rest energy is the threshold energy. As a result, this is changed to: f = W/h, where h is the Planck constant. So, we can calculate the threshold frequency if we know the work function. Photoelectric effect in radioactivity. The frequency at which the effect is only feasible is known as the photoelectric threshold frequency, denoted by the Greek letter nu with the subscript zero, v0. The threshold energy is the lowest energy that each colliding molecule must have in order for the collisions to be successful.

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The average electric power consumption of a machine is 29.4 watt.

Kinetic Energy is defined as the object which has because of its motion.

It is represented as

K = 1/2 mv²

where,

K = Kinetic Energy

m = mass

V = Velocity

Now by putting the value we get the kinetic energy as

K = 1/2 mv²

= 0.5 × 0.3 × (7)²

= 7.35 J

It is given in the question that the machine throws 2 snowballs per second.

Poutput = 2 × 7.35

= 14.7 J/s

= 14.7 watt

According to the question the efficiency is given as 50%. So average electric power is

Avg. Electric power = 2 × 14.7

= 29.4 watt

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Answer:

Knees to Chest

Be consistent. Setting and committing to a regular practice of yoga is absolutely essential if you want to make improvements. ..

Answer: Dog pose was really easy, but tree pose was really difficult because it was hard to balance.

Answer:

23.6

Explanation:

The net force applied on the truck is 267.8 N.

The acceleration of the truck is 3.15 m/s².

The definition of force in physics is: The push or pull on a massed object changes its velocity.

An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude.

A spring balance can be used to calculate the Force. The Newton is the SI unit of force.

Given parameters:

Force applied on the truck: F = 295 N.

Mass of the trick: m = 85 kg.

Weight of the truck: W = mg = 85 kg × 10 m/s² = 850 N.

The coefficient of friction between the rock and the ground is μ = 0.32.

Frictional resistance force applied on the truck: f = μ N =  μW

= 0.32×85 N

= 27.2 N.

Hence, net force applied on the truck = F - f = 295 N - 27.2 N = 267.8 N.

Hence, acceleration of the truck is = 267.8 N/85 kg = 3.15 m/s².

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The net force exists 0 when the forces are in equilibrium. They have the same impact as if there were no forces at all.

Net Force, which is essentially the total of all the forces operating on an item, is the combination or consequence of those forces.

The total of all forces exerted on an object is known as the net force. A mass can accelerate due to net force. A body is subject to another force whether it is at rest or in motion. When there exists a lot of forces acting on a system, the term "net force" exists employed.

Equal in size and directed in the opposite direction, balanced forces are. When forces are evenly distributed, motion remains unchanged. One of your scenarios from the previous section involved pushing or pulling an object with the equal amount of force in opposite directions.

The complete question is:

Directions: Answer each question by circling the correct choice. After you have completed all of the questions, color the picture using the assigned colors.

Question

Choice A

1. The sum of all forces acting on an object is known as...

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Force of friction if the coefficient of static friction is 0.44 is 189.728N. The force of friction if the coefficient of kinetic friction is 0.27 is 116.424N.

Force of friction:

The force that resists the sliding or rolling of one solid object over another is called the force of friction.

The formula for the force of friction is:

F =μN

F = force of friction

μ= coefficient of friction

N = normal force

We have to find the force of friction when the coefficient of static friction is 0.44.

[tex]F_{s}[/tex] = μ N

    = μmg

    = 0.44× 44×9.8

    = 189.728N

Now we have to find the force of friction when the coefficient of kinetic friction is 0.27

[tex]F_{k}[/tex] = μN

    = μmg

    = 0.27 × 44 × 9.8

    = 116.424N

Therefore the force of friction [tex]F_{s}[/tex] is 189.728N and [tex]F_{k}[/tex] is 116.424N

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Answer:

18m/s

Explanation:

Divide 450 into 25 to know how many m per second and it gives 18m per second

You used insight in this situation to find a solution to which you struggling to solve.

On the three aspects of process, task, and phenomenology, there are various definitions of insight (Llinger and Knoblich, 2009). Process is concerned with the cognitive processes that result in clever answers. An analytical process emphasises a deliberate and systematic evaluation of the problem, emphasising logical deduction and strategic thinking, as opposed to descriptions of insightful problem solving processes that emphasise a sudden certainty of a correct response with little to no conscious access to the processing of the solution. It is widely recognised that it is difficult to measure a subjective experience like insight objectively (Llinger and Knoblich, 2009; Ash et al., 2009). In the past, researchers have made use of "classic insight problems," vague issues that Gestalt psychologists first utilised to induce feelings of insight upon realising the solution.

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Answer: 00.99m

Explanation:

because

Answer: 0.099

Explanation: Khan

Answer:

Explanation:

Given:

V₁ = 20 m/s

V₂  = 20 m/s

____________

V - ?

V = √ (V₁² + V₂²) = √ ( 20² + 20²) = 20·√2 ≈ 28 m/s

The magnitude of the resultant velocity of the ship is 40m/s. The correct option is B.

The rate of change of displacement is known as velocity. The rate at which velocity changes is called acceleration.

Due to the fact that it includes both magnitude and direction, velocity is a vector quantity. As the rate at which velocity changes, acceleration is likewise a vector quantity.

The directional speed of an item in motion, as measured by a specific unit of time and observed from a certain point of reference, is what is referred to as velocity.

Here, it is given that,

Initial velocity = 20m/s

Final velocity = -20m/s, as current in the water begins to move from East to West.

We know that,

ΔV = Initial velocity - Final velocity

ΔV = 20 - (-20)

ΔV = 20+20

ΔV = 40m/s

Thus, the correct option is B.

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The angle θ which the left-hand cable makes with respect to the wall is  17⁰.

The resultant force on the cables is determined by resolving the forces into x and y components as shown below.

y-component of the weight;

Wy = -636 N

y-component of the tension in the right cable;

Ty = 890 x sin(26)

Ty = 390.15 N

x-component of the tension in the right cable;

Tx = 890 x cos(26)

Tx = 799.93 N

y-component of the tension in the left cable;

Ty = T sinθ

x-component of the tension in the left cable;

Tx = -T cosθ

Sum of the forces in y-direction;

∑F_y = 0

T sinθ - 636 + 390.15 = 0

T sinθ - 245.85 = 0

T sinθ = 245.85 -------- (1)

Sum of the forces in x-direction;

∑Fx = 0

-T cosθ + 799.93 = 0

T cosθ = 799.93  -------- (2)

Divide equation (1) by (2)

T sinθ / T cosθ = 245.85/799.93

tanθ = 0.307

θ = arc tan(0.307)

θ = 17.1⁰ ≈ 17⁰

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A transverse wave is a wave in which particles of the medium move in a direction perpendicular to the direction that the wave moves. and in a longitudinal wave particles are displaced parallel to the wave direction.

In a transverse wave, the displacement of the individual medium particles occurs in a direction that is perpendicular to the wave's direction of propagation. Imagine holding a slinky and moving your hand up and down, and the slinky follows. However, the actual wave itself travels from left to right.

Transverse waves are created when a medium's particle oscillations are perpendicular to the wave's direction of propagation. An ocean wave is a typical illustration of a transverse wave. The direction of the water molecules' motion in an ocean wave is vertical.

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Forward thrust has positive values and reverse thrust has negative values.

Thrust is a sudden push or pull in a certain direction.

a)

Flight speed u = 150 km/h

1 km/h = [tex]\frac{1}{3.6}[/tex] km/s

therefore, 150 km/h =  41.67 km / s

The thrust force represents the horizontal or x-component of momentum equation:

[tex]T = m_{exhaust} * U_{exhaust} - U_{flight}[/tex]

T = 50 * (150 - 41.67)

T = 5416.67 N

Therefore, the value of forward thrust is 5416.67 N.

b)

Now the exhaust velocity is now vertical due to reverse thrust application, then it has a zero horizontal component,

thus thrust equation is:

[tex]T = m_{exhaust} * U_{exhaust} - U_{flight}[/tex]

T = 50 * (0 - 41.67)

T = -2083.5 N

Therefore, the thrust force T is -2083.5 N in the reverse direction.

c)

Now the exhaust velocity and flight velocity is zero, then it has a zero horizontal component, thus thrust is also zero because[tex]U_{exhaust} = U_{flight} = 0\\[/tex]

T = 0

Therefore, there is no difference in two velocities in x direction.

The given question is incomplete, the complete question is,

"The idling engines of a landing turbojet produce forward thrust when operating in a normal manner, but they can produce reverse thrust if the jet is properly deflected. Suppose that while the aircraft rolls down the runway at 150 km/h the idling engine consumes air at 50 kg/s and produces an exhaust velocity of 150 m/s.

a. What is the forward thrust of this engine?

b. What are the magnitude and direction (i.e., forward or reverse) if the exhaust is deflected 90 degree without affecting the mass flow?

c. What are the magnitude and direction of the thrust (forward or reverse) after the plane has come to a stop, with 90 degree exhaust deflection and an airflow of 40 kg/s?"

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In case of a block resting on the top of a  table and we are considering only the forces acting upon the block.          

                      (block)

     _______[[[[[[[[[]]]]]]]]]]_______  ( table)

             /                                \

           /                                     \

         /                                         \

figure represents block resting on a table,

Gravity P

Spring: A

Tension A

Normal: P

Friction A

Air Res.: A

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The amount of work the two tugboats completed on the supertanker W = 3.12 × 10^9 joules .

Work is a physics term used to describe the energy transfer that takes place when an object is moved over a distance by an external force, at least some . The component of the force acting along the path multiplied by the length of the path can be used to calculate work if the force is constant. Mathematically, this idea is expressed as W = fd, where W is the work and f is the force multiplied by d, the distance. Work is completed when the force is applied at an angle of with respect to the displacement. Performing work on a body involves moving it in its entirety from one location to another as well as other methods.  However, the work is thought to be negative if the applied force is in opposition to the item's motion, indicating that energy is being pulled away from the object

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11.4m/s^2 is the magnitude of the acceleration of the jet while taking off from an aircraft carrier, a jet starting from rest accelerates uniformly to a final speed of 40. meters per second.

[tex]v^2-u^2=2as[/tex] in this

v = final velocity

u =initial velocity

a = acceleration

s =displacement

the data, we have got

u = 0 (it starts from rest)

v = 40 m/s (final velocity)

s = 70 m ( run-way length)

now, put in the equation

[tex]a=v-u/t=(40^2-0)/2(70)=11.4m/s^2[/tex]

When a point or object accelerates or decelerates, it is moving straight forward. Motion on a circle increases despite the same speed because the direction is always changing. All other movements accelerate as a result of these factors.

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It is more difficult to get the object to move or keep moving on a rough surface.

The term friction has to do with the opposition to the motion of an object. We know that friction could lead to a reduction in the speed of the object. If the surface is so rough, the motion an object would be difficult due to a greater resistive force that keeps the object from moving.

We can then see that it would be more difficult for the object to begin to move on the rough surface rather, motion could easily start and be sustained on quite a smooth surface as we can see.

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On a rough surface, it is more challenging to move or maintain the motion of the object due to friction between the object and the surface due to contact.

An object experiences a push or pull as a result of interacting with another object. Each object is subject to a force whenever two objects interact.

According to newton's law, an object tries to maintain its position whether it is at resting or it is in motion. If the body is at rest then it tries to maintain its rest position and if the body is in motion then again it tries to maintain its motion. So, if the box is at rest, it is difficult to move the box in starting because of inertia, but once it is in motion it is easy to keep on going with the flow.

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a) The eccentricity of the orbit is 1.086. b) The orbital speeds at perigee and apogee is 5088 km/s. c) The period of the orbit is 8.516 minutes.

As a property, velocity is used to describe the characteristics of moving objects. It is the amount of movement of an object over a reasonably long period of time.

The satellite orbits the planet in an elliptical pattern. The semi-major axis and eccentricity of an elliptical orbit can be used to identify it.

The apogee distance (the distance between the satellite and the center of the Earth) and the perigee distance (the distance between the satellite and the edge of the planet) are, respectively, R a =R E +d a =6.3710 6 m+36010 3 m=6.7310 6 m.

R p = R E + d p =6.37 10 6 m + 180 10 3 m =6.55 10 6 m

R a =a(1+e) and R p =a(1e) are the relationships between the apogee and perigee distances and eccentricity e, respectively.

E is so little that the orbit is almost round.

The orbit would be a long, thin ellipse, on the other hand, if e is close to unity.

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A singularity is a point where some property is infinite.

In technology, singularity describes a hypothetical future where technology growth is out of control and irreversible. Most especially, the singularity would require computer programs to become so advanced that artificial intelligence transcends human intelligence, potentially rubbing out the boundary between humanity and computers. Nanotechnology is recognized as one of the key technologies that will make singularity a truth. The technological singularity or simply the singularity is a hypothetical future point in time at which technological growth becomes uncontrollable and irreversible, resulting in unforeseeable changes to human civilization.

So we can conclude that a point where something is infinite is known as a singularity.

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The torque on the motor's shaft is 1.375 Nm.

We need to know about torque to solve this problem. Torque is the rotational equivalent of linear force. It can be determined as

τ = F x r

where τ is torque, F is perpendicular force and r is radius.

From the question above, the parameter given are

m = 1.1 kg

d = 25 cm

r = 12.5 cm

Convert radius to meter

r = 12.5 cm

r = 12.5 x 10¯² m = 0.125 m

Find the weight

W = m . g

W = 1.1 . 10

W = 11 N

By substituting the parameters, we get

τ = F x r

τ = 11 x 0.125

τ = 1.375 Nm

Hence, the moment applied is 1.375 Nm

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Answer:

Kinetic Energy is 1.59x10^7 Newtons

Potential Energy cannot be determined since no height is given. An example calculation is provided that assumes 3000 meters.

Explanation:

Kinetic energy is directly proportional to the mass of the object and to the square of its velocity: 

K.E. = 1/2 m v2.

If the mass is in kilograms and the velocity in meters per second, the kinetic energy has units of kilograms-meters per second squared, which is 1 Newton. (A newton is defined as 1 kg⋅m/s2. 1 Joule is defined as 1 N*m, or 1 kg⋅m2/s2

Data: 8500 kg airplane

220 km/h flight speed

We'll convert the speed from km/h to m/sec.

(220 km/h)*(1 h/3600 sec)*(1000m/1km) = 61.1 m/s

Kinetic Energy:

K.E. = 1/2 m v2

K.E. = 1/2 (8500 kg)*(61.1 m/s)^2

K.E. = 1/2 (8500 kg)*(3733 m^2/s^2)

K.E. = 1.59x10^7 kg*m^2/s^2

K.E. = 1.59x10^7 Newtons

Potential Energy

The formula for potential energy depends on the force acting on the two objects. For the gravitational force the formula is P.E. = mgh, where m is the mass in kilograms, g is the acceleration due to gravity (9.8 m / s2 at the surface of the earth) and h is the height in meters.

P.E. = mgh

P.E. = (8500kg)*(9.8 m/s^2)*(h)

I don't see a height given for the plane, so we can't calculate a potential energy. If it were at 3000 meters (1.86 miles), the calculation would be:

P.E. = (8500kg)*(9.8 m/s^2)*(3000 m)

P.E. = (2.5x10^8 kg*m/s^2) or 2.5x10^8 Newtons

The equivalent resistance of a circuit reduces as more parallel resistors are added, but the circuit's overall current increases. Additional branches via which charge can flow are comparable to more resistors being added in parallel.

A circuit can have parallel or series connections connecting two or more electrical components. The circuit is referred to as a parallel circuit when all of the devices are linked utilizing parallel connections. Each device is located in a distinct branch of a parallel circuit. Branch lines indicate that there are numerous paths for charge to move via the external circuit.

A single resistor located in a single branch will be contacted by each charge moving through the external circuit's loop. A charge choose which branch it will take on its way back to the low potential terminal when it reaches the branching site or node.

It was made clear that increasing the number of resistors in a parallel circuit has the very surprising effect of reducing the total resistance. The addition of a second resistor in a different branch creates a second avenue for charge to travel through the circuit's primary area of resistance because there are numerous ways for it to do so.

By increasing the number of branches, the resistance will reduce, which will increase the pace at which charge flows (also known as the current).

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The velocity as a function of time is 0, and displacement between t = 10.0 s and t = 35.0 s is 0.

The vector quantity velocity (v), denoted by the equation v = s/t, quantifies displacement (or change in position, s), over change in time (t).

as S= 0, then

[tex]V_{total}[/tex] = [tex]\frac{ Final Speed - initial speed}{total_time }[/tex]

V=0.

Displacement is defined as the final position minus the starting position.

Displacement = Final distance- initial distance

S= 0

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The youngster may calculate the total distance the cart has travelled using the metre rule by exerting a constant force.

He can calculate how long it took the cart to travel that distance using the stopwatch.

The equation of constant acceleration motion can be used to determine the acceleration of the cart during that motion if the distance travelled by the cart and the time it takes to travel that distance is known.

S = ut + 1/2at²

S = mileage travelled

a = the cart's acceleration, and

t represents the amount of time spent.

The formula for this law is F=ma, where F is the applied force, m is the object's inertial mass, and an is the object's acceleration.

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