Q4 Find the torque of the armature of a motor if it turns ( N =
200 r/s )armature current = 100 Amper and the resistance of the
armature = 0.5 ohms and back E.M.F. = 120 volts .

Answer:

The nail is driven into the wood so that it would hold into the wood because if the wood was driven to the nail it may not stay and it would take way to much effort.

Explanation:

Answer:

mass= 3.5 kg

distance covered= 0.4m

inital speed = 1.5 m/sec

final speed = 0 m/sec

net force

formula for force :

\( \fbox{f = m.a}\)

In order to find the force we need to find the acceleration.

According to third equation of Kinematics-

\( \bold{ {v}^{2} = {u}^{2} + 2as}\)

where,

v= final velocity

u=inital Velocity

a=Acceleration

s=Distance covered

put the value in the above equation

0= (1.5)²+ 2a x 0.4

-2.25= 0.8a

a = -2.25/0.8

a= - 2.8125 m/sec²

now put the value 0f accleration in formula of force

F = 3.5 x - 2.8125

F= -9.84375 N

I'm not sure what you were trying to put here

Answer:

Because they provide information about clouds, oceans, land and ice.

Answer:

so two people can understand each other when presenting new ideas to each other

Explanation:

Answer:

Motion must be defined relative to something.

Explanation:

Basically, the motion of an object will vary according to the observer. And because motion is independent of the frame of reference, the frame of reference must be defined. I hope that makes sense. :)

Answer: There isn't a whole ton of oxygen in space, and if they run out, they will probably die.

Explanation:

This one kind of speaks for itself.

In conclusion, the distance from the horizontal top surface of the cube to the water level can be found by calculating the volume of water displaced by the cube and dividing it by the surface area of the top face.

The distance from the horizontal top surface of the cube to the water level can be determined by comparing the density of the cube to the density of water. Since the cube is floating, its density is equal to the density of water.
To find the distance, we can start by calculating the mass of the cube. The formula to calculate mass is density multiplied by volume. Since the density is given as 650 kg/m3 and the volume of the cube is (20 cm)3, we can convert the volume to cubic meters by dividing by 1,000,000.
Next, we can use the weight of the cube, which is equal to the mass multiplied by the acceleration due to gravity (9.8 m/s2), to find the buoyant force acting on it. The buoyant force is equal to the weight of the water displaced by the cube, and it acts in the upward direction.
Finally, we can equate the weight of the cube to the buoyant force to find the volume of water displaced. Dividing this volume by the surface area of the cube's top face will give us the height of the cube submerged in water.
In conclusion, the distance from the horizontal top surface of the cube to the water level can be found by calculating the volume of water displaced by the cube and dividing it by the surface area of the top face.

To know more about displaced visit:

https://brainly.com/question/29769926

#SPJ11

Answer:

A) rational kinetic energy is conserved

For the scenario painted below Rational kinetic energy is conserved

Option A is correct

Kinetic energy is simply defined as the energy that an item or particle has as a result of its movement.

In conclusion, For A longboard is free to slide on a sheet of frictionless ice. and a skater skates to the board and hops onto one end, causing the board to slide and rotate. In this situation Rational kinetic energy is conserved

Read more about Kinetic energy

https://brainly.com/question/999862

The ion will be deflected either up or down depending on its charge. A positive ion will be attracted towards the negative pole of the magnet, which is located at the bottom of the gap in a horseshoe magnet.

This attraction will cause the ion to change its path and move downward. Conversely, a negative ion will be repelled by the negative pole and move upward. The direction of the ion's deflection can also be determined by the right-hand rule, which states that if you point your thumb in the direction of the ion's motion and curl your fingers in the direction of the magnetic field, the direction of the deflection will be perpendicular to both your thumb and fingers.

Therefore, if the ion is initially traveling into the page, it will be deflected either up or down depending on its charge and the direction of the magnetic field.

For more such questions on ion

https://brainly.com/question/16934465

#SPJ11

When a positive ion enters the gap of a horseshoe magnet, it experiences a force due to the magnetic field created by the magnet. The direction of this force can be determined using the right-hand rule, which relates the direction of the ion's velocity, the magnetic field, and the resulting force on the ion.

As the positive ion is initially traveling into the page, you can represent this direction using your right hand by pointing your thumb into the page. The horseshoe magnet has its north pole on one side and its south pole on the other side, resulting in a magnetic field that flows from the north pole to the south pole horizontally.

Now, point your fingers in the direction of the magnetic field, from the north pole to the south pole. To determine the direction of the force on the positive ion, curl your fingers in the direction of the magnetic field while keeping your thumb pointing into the page. The direction of the force is given by the direction of the palm of your hand.

In this case, the force on the positive ion will be directed upwards. Therefore, the positive ion will be deflected up as it passes through the gap in the horseshoe magnet.

learn more about magnetic field here: brainly.com/question/14848188

#SPJ11

During photosynthesis, the hydrogen atoms come from water molecules that are split apart by light energy in the process called photolysis. The oxygen atoms, on the other hand, come from the same water molecules as the hydrogen atoms. They are released into the atmosphere as a by-product of photosynthesis. So, both the hydrogen and oxygen atoms that become part of the glucose molecule come from water molecules.

To know more about photosynthesis, click here:-

https://brainly.com/question/29764662

#SPJ11

Answer:

Density of the mixture = 855.56kgm-3

Explanation:

Density = Mass / Volume

Volume of Liquid X = 0.5m³

Density of Liquid X = 900kgm-3

Mass of Liquid X = Density × Volume

= 900kgm-3 × 0.5m³ = 450kg

Volume of Liquid Y = 0.4m³

Density of Liquid Y = 800kgm-3

Mass of Liquid Y = Density × Volume

= 800kgm-3 × 0.4m³= 320kg

As X and Y are mixed, we add their masses and volumes together:

Mass = 770kg

Volume = 0.9m³

Now we can find the density of the mixture:

Density = 770kg / 0.9m³ = 855.56kgm-3 (rounded to the 2nd decimal)

The magnitude of the average velocity of the woodchuck is 0.71 m/s. The average speed of the woodchuck is 3.2 m/s.

Right distance = 19m

Time is taken to cover distance = 4.8s

Left distance = 12m

Time is taken to cover distance = 5s

total displacement = 19 m to the right - 12 m to the left = 7 m to the right

A. To calculate the magnitude of the average velocity, we need to find the total displacement and divide it by the total time.

The total time it took for the woodchuck to run both distances is:

The total time = 4.8 s + 5 s

The total time = 9.8 s

The magnitude of the average velocity is:

v = displacement/time

v  = 7 m / 9.8 s

v = 0.71 m/s

B. To find the average speed, we need to calculate the total distance traveled and divide it by the total time.

The total distance traveled is = 19 m + 12 m = 31 m

The total time it took for the woodchuck to run both distances is:

The average speed = total distance / total time

The average speed = 31 m / 9.8 s = 3.2 m/s

Therefore we can conclude that the magnitude of the average velocity is 0.71 m/s and the average speed is 3.2 m/s.

To learn more about average speed

https://brainly.com/question/14618248

#SPJ4

Answer:

I would say A, I hope this helped ; >

(a) At perigee relative to the perifocal reference frame, the spacecraft's position vector r is approximately 3,421.32 km and its velocity vector v is approximately 10,946.04 m/s. (b) At perigee relative to the geocentric equatorial frame is 7,405.01 km and its velocity vector v is approximately 10,332.70 m/s.

A-To calculate the position vector r and velocity vector v at perigee, we need to convert the given orbital parameters to Cartesian coordinates in both the perifocal and geocentric equatorial frames.

Perifocal reference frame:

Given:

e = 1.5

Perigee altitude = 300 km

Position vector r: r = [rp, 0, 0] = [300 km, 0, 0]

Semi-major axis: a = rp / (1 - e) = 300 km / (1 - 1.5) = -600 km

Gravitational parameter of Earth: μ = 3.986 × 10⁵ km³/s²

Velocity vector v: v = (μ * (2/r - 1/a))

v =(3.986 × 10⁵ km³/s² * (2 / 300 km - 1 / -600 km))

v ≈ 10,946.04 m/s

(b) To convert to the geocentric equatorial frame, we need to perform a series of rotations on the position and velocity vectors based on the inclination i, right ascension of the ascending node Ω, and argument of periapsis ω.

First, we rotate the position vector r by Ω around the z-axis. Then, we rotate the resulting vector by i around the x-axis. Finally, we rotate the resulting vector by ω around the z-axis

Geocentric equatorial frame:

Given:

i = 35°

Ω = 130°

ω = 115°

Position vector r: r = [rp, 0, 0] = [300 km, 0, 0]

Rotate by Ω around the z-axis:

r = r * Rz(Ω)

r = r * Rz(130°)

Rotate by i around the x-axis:

r = r * Rx(i)

r = r * Rx(35°)

Rotate by ω around the z-axis:

r = r * Rz(ω)

r = r * Rz(115°)

The resulting position vector r in the geocentric equatorial frame is approximately [7,405.01 km, 0, 0].

Velocity vector v: v = [10,946.04 m/s, 0, 0]

Rotate by Ω around the z-axis:

v = v * Rz(Ω)

v = v * Rz(130°)

Rotate by i around the x-axis:

v = v * Rx(i)

v = v * Rx(35°)

Rotate by ω around the z-axis:

v = v * Rz(ω)

v = v * Rz(115°)

The resulting velocity vector v in the geocentric equatorial frame is approximately [10,332.70 m/s, 0, 0].

learn more about Geocentric equatorial frame here:

https://brainly.com/question/31759432

#SPJ4

One newton force is defined as the force that is necessary to provide a mass of one kilogram with an acceleration of one metre per second per second. One newton is equal to a force of 100,000 dynes in the centimetre-gram-second (CGS) system, or a force of about 0.2248 pound in the foot-pound- second system.

Answer:

0.0520kg

Explanation:

divide by 1000

Consider two blocks a and b. a is resting on top of b on top of a table. someone (your little brother) comes along and pushes the bottom block out to the left from under the top block. The friction force on the top block acts to the right. When someone (who could be the asker's little brother) pushes block B out to the left from under block A, the friction force on the top block acts to the right.

When an object moves over the surface of another object, the frictional force is the resistance it encounters. The amount of friction that develops between two objects is determined by a variety of factors, including the force pushing the objects together and the coefficient of friction between them. The frictional force always opposes the motion of the object. If you push a book across a table, for example, the frictional force will always act in the opposite direction to the book's motion, causing the book to slow down and eventually come to a halt.

The frictional force on the top block, Block A, acts to the right in this case. Since block B is pushed out from under block A, block A will begin to slide to the left. However, due to friction, there will be a force acting on the right side of block A, opposing the motion to the left, and helping it to maintain its position. Since friction opposes the motion of the object, it will always act in the opposite direction of the object's motion, in this case, to the right.

Learn more about force at:

https://brainly.com/question/25790086

#SPJ11

1 ) The cheetah catches its prey after 277 m

2 ) The minimum distance the gazelle must be ahead of the cheetah to have a chance of escape is 31.5 m

Let the velocity of cheetah be Vc and that of gazelle be Vg.

Vc = 95.2 km / h

Vg = 79.9 km / h

Since they both travel for same amount of time,

Tc = Tg

dc / Vc = dc / Vg

( 0.0531 + x ) / 95.2 = x / 79.9

95.2 x = 4.24 + 79.9 x

15.3 x = 4.24

x = 0.277 km

x = 277 m

Distance travelled by cheetah in 7.5 seconds = 26.4 m / s * 7.5 s

Distance travelled by cheetah in 7.5 seconds = 198 m

Distance travelled by gazelle in 7.5 seconds = 22.2 m / s * 7.5 s

Distance travelled by gazelle in 7.5 seconds = 166.5 m

Distance that the gazelle need be ahead of cheetah to escape = 198 - 166.5 = 31.5 m

Therefore,

1 ) The cheetah catches its prey after 277 m

2 ) The minimum distance the gazelle must be ahead of the cheetah to have a chance of escape is 31.5 m

To know more about distance before catching its prey

https://brainly.com/question/19580274

#SPJ1

The phenomenon of wind blowing across suspended power lines causing them to vibrate at their natural frequency and producing audible sound waves is commonly referred to as an aeolian harp.

When wind flows across a power line, it sets up alternating areas of high and low pressure on either side of the line. These pressure differences can cause the line to vibrate back and forth, much like a guitar string being plucked. If the frequency of the wind-induced vibration matches the natural frequency of the power line, resonance can occur, resulting in a sustained and amplified sound wave.

The sound produced by an aeolian harp can vary in pitch and volume depending on the wind speed and direction, the size and shape of the power line, and other environmental factors. In some cases, the sound can be loud enough to be heard from a significant distance away, leading to complaints from nearby residents.

To know more about sound waves visit:-

https://brainly.com/question/18534026

#SPJ11

Spacecraft have observed and measured them. The assertion provides the greatest justification for our certainty that the particles in Neptune's rings are quite tiny. Here option D is the correct answer.

The rings of Neptune are made up of a variety of particles, including dust, pebbles, and boulders. However, we can be sure that the particles in the rings of Neptune are very small because they have been observed and measured by spacecraft.

During the Voyager 2 flyby of Neptune in 1989, the spacecraft captured detailed images of the rings and collected data on the size, composition, and distribution of the particles. The data showed that the particles in the rings of Neptune range in size from tiny dust particles to larger boulder-sized chunks.

In addition to the Voyager 2 data, more recent observations by the Hubble Space Telescope have provided further evidence that the particles in the rings of Neptune are small. Hubble's observations have revealed clumps and arcs in the rings, which suggest that the particles are small and prone to clumping together due to their mutual gravitational attraction.

To learn more about Neptune's rings

https://brainly.com/question/29413835

#SPJ4

Complete question:

Which of the following statements best explains why we can be sure that the particles in the rings of Neptune are very small?

A) They are made of a low-density material

B) They do not produce significant gravitational effects

C) They are composed of ice and rock fragments

D) They have been observed and measured by spacecraft

Answer:

Zero.

Explanation:

Work done by the weight is Zero, since the force and displacement are at right angles to each other.

Answer:

The time taken to reach the maximum height is 3.20 seconds

Explanation:

The given parameters are;

The initial height from which the volcano erupts the lava bomb = 64.4 m

The initial upward velocity of the lava bomb = 31.4 m/s

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

The time it takes the lava bomb to reach its maximum height, t, is given by the following kinematic equation as follows;

v = u - g·t

Where;

v = The final velocity  = 0 m/s at maximum height

u = The initial velocity = 31.4 m/s

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

t = The time taken to reach the maximum height

Substituting the values gives;

0 = 31.4 - 9.8 × t

∴ 31.4 = 9.8 × t

t = 31.4/9.8  ≈ 3.204

The time taken to reach the maximum height rounded to three significant figures = t ≈ 3.20 seconds

Answer:

The person has no displacement

Explanation:

The given parameters are

The location of the person = The equator

The distance covered in one revolution = Total distance around the body

The total distance around the Earth = The circumference of the Earth = 40.075 kilometres

The total distance moved by the person standing at the equator during the Earths complete revolution = 40,075 kilometres

The initial location of the person in relation to a fixed point in space outside Earth at the start of the revolution = x km

The final location of the person in relation to the fixed point in space outside Earth at the completion of the revolution = x km

The displacement = Change in position = Final location - Initial location  

∴ The displacement = x km - x km = 0 km.

Answer:

Higher temperature makes an object less dense 2. Density governs the state of matter for the object, hence as water becomes less and less dense, it becomes gas (water vapour) 3. Higher temperature makes an object has more pressure, hotter gas has higher pressure.

Explanation:

Relation Between Density and Temperature Temperature is the measure of heat. Density is the measure of how closely any given entity is packed or it is the ratio of the mass of the entity to its volume.

I hope this works

Troposphere, stratosphere, mesosphere, thermosphere and exosphere.

Earth's atmosphere has five major layers.

From lowest to highest, layers are the troposphere, stratosphere, mesosphere, thermosphere and exosphere.

a) What are the conditions in the troposphere?

The atmospheric temperature descends upward with a slope of ~10 K km−1 for dry air and ~7 K km−1 for wet air in troposphere.

The temperature of troposphere decreases with an increase in height.

B) What sort of temperatures would she experience in the stratosphere? What other layer is found within the stratosphere?

The temperature in the stratosphere ranges from- 60° F at the troposphere boundary to -5°F at the top.

The temperature increase is due to the ozone layer that absorbs ultraviolet light from solar radiation.

C)What sort of temperatures would she experience in the mesosphere?

The temperature in the mesosphere ranges from -2.5°C to -90°C

The temperature decreases because of a decrease in the absorption of penetrating solar radiation.

The atmosphere gets cooler with an increase in altitude because an increase in distance from the Earth's surface.

D)What sort of temperatures would she experience in the thermosphere? What other layer is found within the thermosphere?

4,500°F is the temperature of thermosphere.

Temperatures climb sharply in the lower thermosphere , then level off and hold fairly steady with increasing altitude above that height.

Temperatures in the upper thermosphere can range from about 500° C (932° F) to 2,000° C (3,632° F) or higher.

Learn more about layers of atmosphere here:

https://brainly.com/question/25881294

#SPJ1

The object's mass and velocity are the most important factors in determining how hard it hits when it collides with something.

When an object collides with another object, the impact force is dependent on the mass and velocity of the moving object. The greater the mass and velocity of the moving object, the greater the force of impact will be. This is because a larger mass will have more kinetic energy, which will be transferred to the object it collides with upon impact. Similarly, a greater velocity will also result in a greater force of impact since the object will have more momentum. Therefore, in order to reduce the force of impact in a collision, it is important to either decrease the mass or velocity of the moving object.

learn more about object here:

https://brainly.com/question/31018199

#SPJ11

Answer:

3m/s^2

Explanation:

Acceleration is change in velocity / time = 45/15 = 3m/s^2

Option D is the correct answer.

To demonstrate the hypothesis, the control experiment must be the nail with 8 coils.

A control experiment is the experiment that remains unchanged or unaffected by other variables.

A controlled experiment is simply an experiment in which all factors are held constant except for one: the independent variable.

For this given experiment, the number of paper clips lifted depends on the number of coils around the wire and voltage applied.

To demonstrate that for every 8 additional coils, you will be able to pick up two additional paper clips, we must have a control experiment, that is an experiment with which we will compare the out come.

This control experiment must be the nail with 8 coils.

Learn more about control experiment here: https://brainly.com/question/17016970

#SPJ1

The system described by the transfer function G(s) = -co² s² + 2a + w², with a damping ratio of 1.3 and a natural frequency of 0.5, has an overdamped unit step response. So, the correct option is (E)

The transfer function of the system is given as G(s) = -co² s² + 2a + w², where co represents the damping ratio, a represents an arbitrary constant, and w represents the natural frequency of the system. We are given that the natural frequency is 0.5 and the damping ratio is 1.3.

To determine the type of unit step response, we need to analyze the damping ratio (co) in relation to the critical damping value (co_critical).

The critical damping ratio (co_critical) is defined as the value where the system is on the threshold between being overdamped and underdamped. It is given by the formula co_critical = 2 * sqrt(a * w²).

In our case, the natural frequency (w) is 0.5, so we can calculate co_critical as follows: co_critical = 2 * sqrt(a * 0.5²).

Since the damping ratio (co) is given as 1.3, we can compare it with co_critical to determine the type of unit step response.

If co > co_critical, the system is considered overdamped (Option E).

If co = co_critical, the system is considered critically damped (Option D).

If co < co_critical, the system is considered underdamped (Option C).

Based on the given values, we can determine that the system is overdamped (Option E) because the damping ratio (1.3) is greater than the critical damping ratio.

To know more about damping ratios, refer here:

https://brainly.com/question/31463018#

#SPJ11