T/F if an object is stretched beyond its elastic limit, it does not return to its original length upon removal of the external force.

Answer:

1.67 amperes

Explanation:

Ohm's law states that at constant temperature, the current flowing in an electrical circuit is directly proportional to the voltage applied across the two points and inversely proportional to the resistance in the electrical circuit.

Mathematically, Ohm's law is given by the formula;

\( V = IR \)  ......equation 1

Where;

Making I the subject of formula, we have;

\( I = \frac {V}{R} \)  .....equation 2

Given the following data;

To find the current flowing through the battery, we would use eqn 2;

\( I = \frac {10}{6} \)  

Current, I = 1.67 amperes

Answer:

Millions of other species, including humans, depend on fresh water to drink. When an area loses a large percentage of its fresh water, many animals die off

Explanation:

No explanation needed because i'm just that good..

Answer:

Water full lands support life more with more diverse species of plants and animals in positive way. As compared to it barren and deserted lands with no or less water are less diverse with few hard living species .

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Answer:

Work = F * S      force * distance

Power = Work / Time = F * S / t

Velocity = distance / time = S / t = v

Power = F * v

P = 685 N * (11 m / 8.75 s)

P = 685 N * 1.26 m/s = 861 Joules / sec = 861 Watts

(Note 1 Watt = 1 Joule / sec

Electricity is the set of physical phenomena associated with the presence and motion of matter that has a property of electric charge. Electricity is related to magnetism, both being part of the phenomenon of electromagnetism, as described by Maxwell's equations.

a form of energy resulting from the existence of charged particles (such as electrons or protons), either statically as an accumulation of charge or dynamically as a current.

Hope this helps

Answer:

Explanation:

The answer is C

The magnitude of the force the dart exerted on the board is 50 Newton.

The definition of force in physics is: The push or pull on a mass-containing item 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. Newton is the SI unit of force.

Given parameters:

Mass of the dart: m= 0.040 kg.

Momentum of the dart: p = + 1.5 kg m/s.

Time required to stop = 0.030 seconds.

Hence, the magnitude of the force the dart exerted on the board is =

change in momentum/time

= (1.5 - 0.040×0)/0.030 Newton

= 50 Newton.

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To determine the maximum mass of coal the barge can carry in freshwater without sinking, we need to consider its buoyancy and weight. Buoyancy is the force that allows the barge to float and is equal to the weight of the water displaced by the barge. The weight of the barge and its cargo must not exceed the buoyant force to prevent sinking.

Assuming the barge has a rectangular shape, we can calculate its volume using the formula V = l x w x h, where l is the length, w is the width, and h is the height of the barge. Let's assume the barge is 30 meters long, 10 meters wide, and 4 meters high. Therefore, the volume of the barge is V = 30 x 10 x 4 = 1200 cubic meters.

Since the barge is made of 4.6-cm-thick steel plates on each side and the bottom, we need to calculate the weight of the steel and subtract it from the buoyant force. The density of steel is approximately 7850 kg/m^3. The total surface area of the barge is (2 x 30 x 4 + 2 x 10 x 4 + 30 x 10) = 280 square meters. Therefore, the mass of the steel in the barge is:

mass of steel = density x volume x thickness
mass of steel = 7850 x 280 x 0.046
mass of steel = 97,724 kg

Next, we need to calculate the buoyant force acting on the barge. The density of freshwater is 1000 kg/m^3. Therefore, the weight of the water displaced by the barge is:

weight of water = density x volume
weight of water = 1000 x 1200
weight of water = 1,200,000 kg

Finally, we can calculate the maximum mass of coal the barge can carry in freshwater without sinking:

maximum mass of coal = weight of water - weight of barge and steel
maximum mass of coal = 1,200,000 - (97,724 + weight of coal)

Assuming the density of coal is approximately 1300 kg/m^3, we can calculate the volume of coal that the barge can carry:

volume of coal = (weight of coal) / (density of coal)

Substituting this in the previous equation and solving for the maximum mass of coal, we get:

maximum mass of coal = 1,200,000 - (97,724 + volume of coal x 1300)

Solving for the maximum volume of coal, we get:

volume of coal = (1,200,000 - 97,724) / 1300
volume of coal = 882.7 cubic meters

Therefore, the maximum mass of coal the barge can carry in freshwater without sinking is:

maximum mass of coal = volume of coal x density of coal
maximum mass of coal = 882.7 x 1300
maximum mass of coal = 1,146,510 kg

In conclusion, the barge can carry a maximum of 1,146,510 kg of coal in freshwater without sinking, assuming the barge has a rectangular shape with dimensions of 30 x 10 x 4 meters and is made of 4.6-cm-thick steel plates on each side and the bottom.

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Answer:

A , C , E

they are all multiples of 3

Answer:343m

Explanation:

Answer:

The baseball was falling during 1.733 seconds.

Explanation:

The baseball experimented a free fall, which is a particular case of uniformly accelerated motion, in which object is accelerated by gravity. In this case, we need to determine the time spent by the ball before hitting the ground (\(t\)), measured in seconds, which is determined by the following kinematic formula:

\(t = \frac{v-v_{o}}{g}\) (1)

Where:

\(v_{o}\), \(v\) - Initial and final speeds of the baseball, measured in meters per second.

\(g\) - Gravitational acceleration, measured in meters per square second.

If we know that \(v_{o} = 0\,\frac{m}{s}\), \(v = 17\,\frac{m}{s}\) and \(g = 9.807\,\frac{m}{s^{2}}\), then the time spent by the baseball is:

\(t = \frac{17\,\frac{m}{s}-0\,\frac{m}{s} }{9.807\,\frac{m}{s^{2}} }\)

\(t = 1.733\,s\)

The baseball was falling during 1.733 seconds.

Answer:a

Explanation:

Answer:

in the converson to cm³

l m= 100cm

what about :

l m³ = 1000×1000×1000

= 1000000cm³

After this we :

1 m³ = 1000000cm³

how about:

100m³ = 100 × 1000000cm³

= 100000000cm³

When light illuminates a diffraction grating with 7000 lines per centimeter, its second order maximum is at 62. 4°. The wavelength of the light is 2.6711 x \(10^{-7\) cm.

To find the wavelength of the light, we can use the formula for the grating equation:

mλ = d sin(θ)

Where:

m is the order of the maximum (in this case, m = 2 for the second-order maximum)

λ is the wavelength of the light

d is the spacing between the lines of the diffraction grating

θ is the angle of maximum (in radians)

Given:

Spacing between the lines of the diffraction grating (d) = 1/7000 cm = 0.000142857 cm

Angle of the second-order maximum (θ) = 62.4

First, we need to convert the angle from degrees to radians:

θ (in radians) = (π/180) * θ = (π/180) * 62.4°

Now we can substitute the values into the grating equation:

2λ = (0.000142857 cm) * sin[(π/180) * 62.4°]

Simplifying the equation:

λ = [(0.000142857 cm) * sin[(π/180) * 62.4°]] / 2

λ = [(0.000142857 cm) * sin[(3.14159/180) * 62.4°]] / 2

λ = [(0.000142857 cm) * sin[1.08934]] / 2

Now, we can use a calculator to evaluate sin[1.08934]:

sin[1.08934] ≈ 0.01872

Substituting this value back into the equation:

λ = [(0.000142857 cm) * 0.01872] / 2

λ ≈ 2.6711 x \(10^{-7\) cm

Therefore, the wavelength of the light is approximately 2.6711 x \(10^{-7\) cm.

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On Waxing Gibbous, more than half of the moon will be illuminated. And this phase is called waxing gibbous.

As mentioned above the phase of the moon depends upon the relative orientation of the sun, moon, and earth.

Accordingly the portion of the moon which will be bright (illuminated )and dark will change. So in the above diagram, we can see the portion of the moon will be illuminated and the portion that is facing away from sun I marked black.

The half we can see from the surface of the earth in this orientation is also, marked by the white line.

Now, we can draw the phase of the moon, accordingly. (see image)

On Waxing Gibbous, more than half of the moon will be illuminated. And this phase is called as waxing gibbous.

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The type of motion that describes the flight of a softball after it leaves the bat and sails in an arc over the outfield fence The trajectory of a projectile is determined by the angle at which it is launched, the initial velocity, and the effects of air resistance and gravity. The path of a projectile can be predicted using mathematical equations that take into account these factors. Projectile motion is used in a variety of applications, including ballistics, sports, and engineering.

Projectile motion is the motion of a projectile, which is any object that has been thrown, shot, or launched into the air and is subject to gravity. Projectiles move in two dimensions, and their motion can be described using kinematic equations that take into account the initial velocity, the angle at which it was launched, and the effects of gravity.

Projectile motion has two distinct components: horizontal motion and vertical motion. The horizontal motion is constant, which means that it does not accelerate. The vertical motion, on the other hand, is subject to acceleration due to gravity, which is 9.81 m/s².

As a result, the vertical motion of a projectile is parabolic in shape.The trajectory of a projectile is determined by the angle at which it is launched, the initial velocity, and the effects of air resistance and gravity. The path of a projectile can be predicted using mathematical equations that take into account these factors. Projectile motion is used in a variety of applications, including ballistics, sports, and engineering.

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The image is approximately 9.33 cm away from the mirror, on the object's side.

To determine the image location formed by a converging mirror, we can use the mirror equation:

1/f = 1/d_o + 1/d_i

where:

f is the focal length of the mirror,

d_o is the object distance (distance of the object from the mirror), and

d_i is the image distance (distance of the image from the mirror).

In this case, the focal length (f) is given as 7 cm, and the object distance (d_o) is 4 cm.

Plugging in the values into the mirror equation:

1/7 = 1/4 + 1/d_i

To find the image distance (d_i), we can solve for it:

1/d_i = 1/7 - 1/4

1/d_i = (4 - 7) / (4 * 7)

1/d_i = -3 / 28

Taking the reciprocal of both sides:

d_i = 28 / -3

d_i ≈ -9.33 cm

The negative sign indicates that the image formed by the converging mirror is virtual and located on the same side as the object.

Therefore, the image is approximately 9.33 cm away from the mirror, on the object's side.

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Answer: An eclipse of the Sun occurs at only full Moon

Explanation:

Answer:

F = 592238.09 N

Explanation:

To find the mean force you first calculate the acceleration by using the following kinematic equation:

\(v^2=v_o^2+2ax\\\\v_o=0m/s\\\\v=10km/h\\\\x=8.4m\\\\\)

you do "a" the subject of the equation and replace the values of the other parameters:

\(a=\frac{v^2}{2x}=\frac{10000m/s}{2(8.4m)}=595.23\frac{m}{s^2}\)

next, the force, by using the second Newton law is:

\(F=ma=(1000kg)(595.23\frac{m}{s^2})=595238.09\ N\)

hence, the force is 592238.09 N

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TRANSLATION:

Para encontrar a força média, primeiro calcule a aceleração usando a seguinte equação cinemática:

você faz "a" o assunto da equação e substitui os valores dos outros parâmetros:

Em seguida, a força, usando a segunda lei de Newton, é:

portanto, a força é 592238.09 N

1. The resultant force is 78.4 N at an angle of 86.4° and 2. The magnitude of acceleration is 156.8 m/s^2.

To solve the problem, we need to find the vector sum of the forces acting on the body.

(1) Resultant force and direction:

We can start by breaking down each force into its x and y components using trigonometry.

F¹x = 80cos(90°) = 0

F¹y = 80sin(90°) = 80

F²x = 16cos(180°) = -16

F²y = 16sin(180°) = 0

F³x = 8cos(30°) = 6.928

F³y = 8sin(30°) = 4

F⁴x = 12cos(300°) = 10.392

F⁴y = 12sin(300°) = -6

Next, we can add up the x and y components separately to find the total force vector:

F_total_x = F¹x + F²x + F³x + F⁴x = 0 - 16 + 6.928 + 10.392 = 1.32 N

F_total_y = F¹y + F²y + F³y + F⁴y = 80 + 0 + 4 - 6 = 78 N

The magnitude of the total force can be found using the Pythagorean theorem:

|F_total| = sqrt((F_total_x)^2 + (F_total_y)^2) = sqrt((1.32)^2 + (78)^2) = 78.4 N

The direction of the total force can be found using inverse tangent:

θ = tan^-1(F_total_y/F_total_x) = tan^-1(78/1.32) = 86.4°

Therefore, the resultant force is 78.4 N at an angle of 86.4°.

(2) Magnitude of acceleration:

To find the magnitude of acceleration, we can use Newton's second law:

F_total = m*a

Where F_total is the total force we just found, m is the mass of the body (0.5 kg), and a is the acceleration we're looking for. Solving for a:

a = F_total/m = 78.4 N / 0.5 kg = 156.8 m/s^2

Therefore, the magnitude of acceleration is 156.8 m/s^2.

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It will take the racehorse approximately 83 seconds (or 1 minute and 23 seconds) to reach the finish line in a 1,500 m race at a speed of 65 km/h.

To find out how long it will take the racehorse to reach the finish line, we need to use the formula:

time = distance ÷ speed

where:

distance = 1,500 m

speed = 65 km/h = (65 × 1,000) m/h = 65,000 m/h

Now, we need to convert the speed from meters per hour to meters per second, since the distance is given in meters. We can do this by dividing the speed by 3,600 (the number of seconds in an hour):

speed = 65,000 m/h ÷ 3,600 s/h = 18.06 m/s (rounded to two decimal places)

Substituting the values into the formula, we get:

time = 1,500 m ÷ 18.06 m/s = 83.03 seconds (rounded to two decimal places)

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Radioactivity is a part of our earth - it has existed all along. Naturally occurring radioactive materials are present in its crust, the floors and walls of our homes, schools, or offices and in the food we eat and drink. There are radioactive gases in the air we breathe. Our own bodies - muscles, bones, and tissue - contain naturally occurring radioactive elements.

Compared to the power consumption of resistor R1 with the switch open, the power consumption of R1 with the switch closed is smaller.

The reason being is when the switch is closed, the resistance of the circuit is reduced and thus the current flow increases. Therefore, the power consumed by resistor R1 will be more when the switch is closed, than when it is open.

Increasing the current flow in a circuit means that the resistance of the circuit is reduced, which is also caused by the closing of a switch, which increases the current flowing in the circuit.

This is due to Ohm's Law, which states that V = IR, where V is voltage, I is current, and R is resistance. Since the value of R has decreased, the power consumption of R1 with the switch closed is less than when the switch is open.

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Answer:

Reproduction

Explanation:

because reproduction produces variation within the species allowing the species to survive selection

Answer: D = reproduction

Explanation:

Answer:D

Explanation:

Answer:

480 milies per hours

Explanation:

Step one

Given

time taken = 2 hours

the distance between the cities = 960miles

Required

the speed of the plane

Step two:

the formula for the speed is

speed= distance/time

speed= 960/2

speed= 480 milies per hours

Answer:

The Answer is: ∴t=150 nm.

Answer:

65 miles/hr

Explanation:

v0 + a • t = vf

v0 = initial velocity = 50 miles/hr

a = acceleration = 15 miles/hr/hr

t = time displaced = 1 hr

vf = final velocity

50 miles/hr + (15 miles/hr/hr • 1 hr) = final velocity

65 miles/hr = final velocity

Answer:

161.7N

Explanation:

Given parameters:

Mass of the box  = 55kg

Coefficient of friction  = 0.3

Applied force  = 140N

Unknown:

Frictional force on the box = ?

Solution:

The frictional force on the box is a force that opposes the motion of the box.

To find the value of this force;

        Fr  = u m g

u is the coefficient of static friction

m is the mass

g is the acceleration due to gravity

 So;

     Fr  = 0.3 x 55 x 9.8  = 161.7N

To find the light speed in the glass, we can use the formula:

v = c / n

where v is the speed of light in the glass, c is the speed of light in a vacuum (approximately 3.00 x 10^8 m/s), and n is the refractive index of the glass.

Let's assume the refractive index of the glass is 1.50 (a typical value for glass).

v = (3.00 x 10^8 m/s) / 1.50 = 2.00 x 10^8 m/s

So, the speed of light in the glass is 2.00 x 10^8 m/s.

To find the number of wavelengths of the light inside the slide, we can use the formula:

n = d / λ

where n is the number of wavelengths, d is the thickness of the slide, and λ is the wavelength of the light.

Given:

d = 2 mm = 2 x 10^-3 m

λ = 510 nm = 510 x 10^-9 m

n = (2 x 10^-3 m) / (510 x 10^-9 m)

n = 3.92

So, approximately 3.92 wavelengths of the light are inside the slide.

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Answer:

12mph in 2hrs and 3mph in 0.5hrs the total distance would be 12*2 and 3*0.5 which would be 24 and 1.5 so we add those 24+1.5= 25.5. The answer would be 25.5