A variable is defined as a___ that can have ____than one single value.

Answer:

100 foot

Explanation:

Using the formula for calculating range to calculate the speed first as shown;

U is the speed

theta is the observe angle

g is the acceleration due to gravity.

200 = U²sin 2(45)/9.8

Usin90 = 200 * 9.8

U² = 1960

U = √1960

U = 44.27 m/s

Get the required altitude

Altitude H = u²/2g

H = 44.27²/2(9.8)

H = 1,959.8329/19.6

H = 99.99 feet

Hence the altitude of the rocket to the nearest foot is 100 foot

Answer:

F = Δ(mv)/Δt = ma

Explanation:

Newton's second law states that the force exerted on an object is equal to the rate of change of its momentum.

Let F represent force and p momentum and p = mv where m = mass and v = velocity

This implies that F = Δp/Δt = Δ(mv)/Δt if the mass is constant, we have

F = mΔv/Δt and we know that acceleration, a = Δv/Δt

So, F = ma which is Newton's second Law.

The correct answer is :

Mirror Parabola A mirror with a parabola-shaped reflecting surface is referred to as a parabolic mirror. The mirror is employed in search lights because it can precisely converge a broad parallel beam of light at the focus. Therefore, even at a great distance, the intensity of the reflected beam is unaffected.

Parabolic In search lights, concave mirrors with sizable apertures are utilized. For searching items in search light, we require a powerful parallel beam of light. The reflected rays from an object placed at a concave mirror's focus are parallel to one another and likewise parallel to the main axis. So, we position a light source at the concave mirror's focal point.

To learn more about parabolic mirror refer the link:

https://brainly.com/question/3885217

#SPJ9

The speedboat momentum is 19,500 kg.m/s.

We need to know about momentum to solve this problem. Momentum can be defined as the degree of difficulty to stop a moving object. It can be determined by

P = m . v

where P is momentum (kgm/s), m is mass (kg) and v is velocity (m/s).

From the question above, we know that:

m = 1500 kg

v = 13 m / s

By substituting the given parameters, we can calculate the momentum

P = m . v

P = 1500 . 13

P = 19,500 kg . m / s

Hence, the speedboat momentum is 19,500 kg.m/s.

Find more on momentum at: brainly.com/question/25121535

#SPJ4

Answer:19,500 kg

Explanation:your welcome!:)

Answer

v= 1/R mark me brainliest pls

It is proved that the speed of the light measured in the laboratory frame is , u =c/n(1+ nv/c)/(1+ v/nc) .

Given ,

The motion of a transparent medium influences the speed of light .

The water moves with speed v in a horizontal pipe .

Assume that the light travels in the same direction as the water moves .

The speed of the light with respect to the water is c/n

Where n = 1.33 is the refractive index of water .

Let us assume ,

u' be the speed of light in water , in the frame moving with the water .

u' is related to the refractive index of water ,n as :

u'=c/n

where , c is the speed of light .

let , u be the speed of light in water in the lab frame .

Now , u and u' are related as : u = (u'+ v )/(1+ u'v/c^2)

Here v is the speed of water in the horizontal pipe .

we know the value of u' , so by substituting the value , we will get ,

u= (c/n+ v)/(1+cv/nc^2)

u= c/n(1+ nv/c)/(1+v/nc)

Hence , it is proved that the speed of the light measured in the laboratory frame is , u =c/n(1+ nv/c)/(1+ v/nc) .

Learn more about speed here :

brainly.com/question/13943409

#SPJ4

The direction of the field the current creates at a point on the wall outside the frame to the right is horizontally towards you.

The current will flow from the bottom of the wire to the top if the magnetic field around a vertical electrical wire is counterclockwise in direction.

A magnetic field, a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. When a charge moves through a magnetic field, a force that is perpendicular to both its own velocity and the magnetic field operates on it.

A permanent magnet's magnetic field pulls on ferromagnetic materials like iron and draws or repels other magnets. Since the direction and strength of a magnetic field can vary depending on the location, it can be mathematically described by a function that gives each point a vector.

To learn more about Electric wire , visit :

https://brainly.com/question/28196991

#SPJ4

Answer:

whichever teacher gave you this question is a legend

Explanation:

The kangaroo's minimum vertical speed when it leaves the ground is 5.94 m/s

The following data were obtained from the question given above:

We can determine the inintial velocity of the kangaroo as follow:

v² = u² – 2gh (since the ball is going against gravity)

0² = u² – (2 × 9.8 × 1.8)

0 = u² – 35.28

Collect like terms

u² = 0 + 35.28

u² = 35.28

Take the square root of both side

u = √35.28

u = 5.94 m/s

From the above calculation, we can conclude that the minimum vertical speed of the kangaroo when it leaves the ground is 5.94 m/s

Learn more about motion under gravity:

https://brainly.com/question/22719691

#SPJ1

Answer:

25000w

Explanation:

P=Fxs

p=500×50

p=25000 watts

Answer:

9

Explanation:

about

The radius of the electrons is 2.14 × 10⁻⁵ m.

A magnetic field, often known as a vector field, describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. A force acting on a charge while it travels through a magnetic field is perpendicular to both the charge's motion and the magnetic field.

Electrons go downward and positive ions move upward in a long, straight, vertical lightning stroke, creating a current of magnitude I = 20.0 kA.

The speed of the electron through the air if v = 300 m/s at r = 50 m east from the stroke's center.

Let the magnetic force be F, and B be the magnetic field.

Counterclockwise horizontal arcs of field lines are produced by the upward lightning current.

Then,

[tex]B = \frac{\mu_{0} I}{2 \pi r}[/tex]

[tex]B =\frac{4\pi \times 10^{-7} \times 20 \times 10^{-3}}{2 \pi(50)}[/tex]

B = 8 × 10⁻⁵ T north by the right-hand rule.

Then the radius of the electron will be:

r = mv / qB

[tex]r = \frac{(9.11 \times 10^{-31}) \times (300)}{(1.6 \times 10^{-19})(8 \times 10^{-5})}[/tex]

r = 2.14 × 10⁻⁵ m

Learn more about current here:

brainly.com/question/1100341

#SPJ4

The radiation pressure directed at normal incidence onto a perfectly reflecting sheet is 2.71 × 10⁻⁷ Pa

Given that a linearly polarized microwave of wavelength 1.50cm is directed along the positive x axis and the electric field vector has a maximum value of 175V/m and vibrates in the x y plane.

Also, assuming the magnetic field component of the wave can be written in the form B=Bmax sin (k x-Ω t) give values for (f) If this wave were directed at normal incidence onto a perfectly reflecting sheet, we desire to find the radiation pressure.

The radiation pressure for total reflection is given by P = 2I/c where

So, P = 2I/c

P = 2E²/2μ₀c ÷ c

P = E²/μ₀c²

Substituting the values of the variables intot he equation, we have

P = E²/μ₀c²

P = (175 V/m)²/[4π × 10⁻⁷ T/m × (3 × 10⁸ m/s)²]

P = 30625 V²/m²/[4π × 10⁻⁷ T/m × 9 × 10¹⁶ m²/s²]

P = 30625 V²/m²/[36π × 10⁹ Tm/s²]

P = 30625 V²/m²/113.097 × 10⁹ Tm/s²

P = 270.78 × 10⁻⁹ Pa

P = 2.7078 × 10⁻⁷ Pa

P ≅ 2.71 × 10⁻⁷ Pa

So, the radiation pressure directed at normal incidence onto a perfectly reflecting sheet is 2.71 × 10⁻⁷ Pa

Learn more about radiation pressure here:

https://brainly.com/question/28203891

#SPJ1

The phenomenon that is occurring is depicted in fig. Induction can be used to provide an explanation for this. As seen in Fig., when a negatively charged plastic rod is pushed close to a metal rod that is initially unaltered, the metal rod's left end picks up positive charges while the right end will pick up negative charges as a result of induction. when the empty metal ball is brought close to the metal rod's right end. The ball's near face subsequently develops a positive charge as a result of induction, and this positive charge attracts the rod since opposite charges are attracted to one another.

Electromagnetic induction, often known as induction, is the technique of creating electrical current in a conductor by exposing the conductor to a fluctuating magnetic field. Because the magnetic field is thought to have induced the current in the conductor, it is known as induction.

To learn more about Induction, visit:

https://brainly.com/question/18575018

#SPJ4

The distance to the Earth at the moment of the landing craft's launch as measured by the aliens is 0.16 light years.

To find the answer, we have to know about the Lorentz transformation.

It is given that, an alien spaceship traveling at 0.600 c toward the Earth, in the same direction the landing craft travels with a speed of 0.800 c relative to the mother ship. We have to find the distance to the Earth at the moment of the landing craft's launch as measured by the aliens.

        [tex]L=L_0\sqrt{1-\frac{V^2}{c^2} } =0.2ly\sqrt{1-\frac{(0.6c)^2}{c^2} }=0.2ly\sqrt{1-0.36}= 0.16ly[/tex]

Thus, we can conclude that, the distance to the Earth at the moment of the landing craft's launch as measured by the aliens is 0.16 light years.

Learn more about the frame of reference here:

https://brainly.com/question/20897534

#SPJ4

The aqueous humor in a person’s eye exerts a force of 0.295 n on the 1.15-cm2 area of the cornea pressure is this in mm Hg P = 2565.2173 N/m².

Pressure is defined as the normal force F per unit area A over which the force is applied or

P = F / A

Where :

P is the pressure acting on the cornea .

F if the force acting on the cornea .

A is the area of the cornea .

Givens : F = 0.3 N and A = 0.00011 m

Plugging known information to get :

P = F / A

P = 0.295 / 0.000115

P = 2565.2173

P =2565.2173 N/m²

The ciliary body produces aqueous humor, which travels along the uveoscleral pathway from the posterior chamber through the pupil and anterior chamber (shown by dashed lines and arrowheads) to the ciliary muscle and suprachoroidal region.

To know more about pressure visit :

https://brainly.com/question/15175692

#SPJ4

I understand the question you are looking for :

suppose the aqueous humor in a person’s eye exerts a force of 0.295 n on the 1.15-cm2 area of the cornea. What pressure is this in mm Hg?

Answer:

True

Explanation:

By using the thrust force, the acceleration is  0.001 m/s².

We need to know about force to solve this problem. According to second Newton's Law, the force applied to an object will be proportional to mass and acceleration. Hence, it can be written as

F = m . a

where F is force, m is mass and a is acceleration

From the question above, we know that

F = 1 N

m = 1000 kg

By substituting the given parameters, we can calculate the acceleration

F = m . a

1 = 1000 . a

a = 1/1000

a = 0.001 m/s²

Find more on force at: https://brainly.com/question/25239010

#SPJ4

Answer:

Work=force × distance

=45×15

=675

Explanation:

need thanks and make me brainiest if it helps you

Answer:

Ahmed did more work in lifting the weight than Omar.

Explanation:

Work done can be determined as the product of a force and the distance moved in the direction of the force.

Work done = F x s

In the given question, since the weight is lifted through a height, then the work done equals potential energy.

i.e Work done = Potential energy

                       = mgh

But,

Force = weight = mg

So that,

Work done = Fh

where F is the weight and h is the height.

i. Work done by Omar = Fh

                            = 200 x 2.0

                            = 400

Work done by Omar is 400 Nm.

ii. Work done by Ahmed = Fh

                                     = 200 x 2.1

                                     = 420

Work done by Ahmed is 420 Nm.

Thus, Ahmed did more work in lifting the weight than Omar.

Answer:

You should weigh about 16 pounds.

Explanation:

To find this, you need to find your weight and divide it by 6 to find your weight on the moon.

Only elementary wavelength of the string wave is same for all six strings that is choice (b) .

a ) every note includes a totally different harmonic (notes E, B, G, D, A, E).

b) Correct. The wavelength depends solely on the chord length  and boundary conditions and is that the same for all six strings.

c) Corresponds to the basic tone, since the basic wavelength of the radiated sound varies from string to string.

d) String wave rate depends on the mass density and tension of the string. All half-dozen strings square measure totally different, therefore the wave speed is additionally totally different.

Learn about fundamental frequency more here :

brainly.com/question/1967686

#SPJ4

1) Clapping your hands - Energy is converted from mechanical energy to sound energy

2) Turning on a light - Energy is converted from electrical energy to heat and light energy

Energy is converted from one form to another and it neither created nor destroyed. This is the first law of thermodynamics. This law means that energy does not get lost in the system. We can not have the energy in the system just suddenly vanish into the thin air. It must have to change from one form to the next.

Now we know that the conversion of energy from one form to the next is not a hundred percent efficient process, some energy may ne lost on the way! This is the statement that we could call the second law of thermodynamics.

Let us look at the energy conversions in the following cases;

1) Clapping your hands - Energy is converted from mechanical energy to sound energy

2) Turning on a light - Energy is converted from electrical energy to heat and light energy

Learn more about energy conversions:https://brainly.com/question/11234965

#SPJ1

The intensity that results if the frequency is increased to for while a constant displacement amplitude is  I = (pv'²s²v)/8π²

The amplitude of a periodic variable is a measure of its change over a single period (such as a period of time or space). The amplitude of an aperiodic signal is its magnitude relative to a reference value. Amplitude has several definitions, all of which are functions of the magnitude of the difference between extreme values ​​of a variable. In older texts, the phase of a periodic function is sometimes called the amplitude. Peak amplitude is commonly used in audio system measurements, telecommunications, etc. A measurand is a signal that oscillates above and below a reference value but is not sinusoidal. If the reference is zero, this is the maximum absolute value of the signal. If the reference is the mean (DC component), the peak amplitude is the maximum absolute difference from that reference.

I = 1/2 pw²s²v = (1/8π)pv²s²v

To learn more about amplitude, Visit:

https://brainly.com/question/19425092

#SPJ4

Electromagnetic force can not be considered because it very less as compared to gravitational force.

There are four types of Nuclear Forces :

1. Gravitational force

2. Electromagnetic force

3. Strong nuclear force

4. Weak nuclear force

The force acting between  the sun and the earth is gravitational force it is about

3.54 ×10²²N

Earth rotates around the sun because it is contained in the sun's gravitational field.

Due to the centripetal force Earth doesn't falls into  the sun.

Electromagnetic force can not be considered because it very less as compared to gravitational force. The electromagnetic force between two charged bodies is nearly equal to 10⁵N.

Electromagnetic force can not be considered because it very less as compared to gravitational force.

To know more about gravitational force :

https://brainly.com/question/24783651

# SPJ4  

Answer:

Explanation:

The strength of the gravitational force between two objects depends on two factors, mass and distance. the force of gravity the masses exert on each other. If one of the masses is doubled, the force of gravity between the objects is doubled.

Simple pendulum takes 0.01 s to reach the maximum displacement from the equilibrium position, so it's frequency equals to 100 Hz

The time period of a simple pendulum: It is defined as the time taken by the pendulum to finish one full oscillation and is denoted by “T”. The amplitude of simple pendulum: It is defined as the distance travelled by the pendulum from the equilibrium position to one side.

The frequency of the pendulum defines how many times the pendulum moves back and forth in a specific period of time

time period of simple pendulum = 1 / frequency

given

time period = 0.01 second

frequency = 1 / 0.01

                 = 100 Hz

correct answer will be d) 100 HZ​

To learn more about simple pendulum here

https://brainly.com/question/14759840

#SPJ1

Answer:

Molecules are made up of atoms that are held together by chemical bonds. These bonds form as a result of the sharing or exchange of electrons among atoms. The atoms of certain elements readily bond with other atoms to form molecules. ... The element helium is a one-atom molecule. I hope this helps :)

Answer:

atoms held together by chemical bonds

Explanation:

The angle he should throw the second snowball to make it hit the same point as the first is 27⁰.

The range of the projectile is the distance traveled by a projectile in the horizontal direction.

There is no acceleration in this direction since gravity only acts vertically.

The range of a projectile is given as;

R = u²sin(2θ) / g

where;

For the range of a projectile the angle of projection is related in the following equation.

when the initial angle of projection = θ

new angle of projection so that it will have the same range =  90 - θ

new angle = 90 - 63⁰ = 27⁰

check;

sin(2 x 63) = sin(2 x 27) = 0.809

Thus, the angle he should throw the second snowball to make it hit the same point as the first is 27⁰.

Learn more about angle of projection here: https://brainly.com/question/4275218

#SPJ1

Answer:if 1 m = 100 cm then there should be 200 cm in m^2

Explanation: