a plane travels West for a distance of 750 km the trip takes 45 minutes calculate the planes velocity in terms of km/hr
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answer in photo enjoy

Answer:

A) Mass in air is unrelated to altitude

Explanation:

Mass is the amount of matter contained in a substance. Altitude is the height of a body above a reference plane.

Mass and altitude are unrelated.

Answer:

Inches or Centimeters

Explanation:

Inches or centimeters are the most appropriate units of measurement for the computer screen because they are in the form of whole figures that can be easily comprehended. Usually the width of computer screens span from 10 to 20 inches.

Conversion of a 15inches computer to meters;

1inch=0.0254meter

15inches= ?

15inches*0.0254/1

=0.381meters

The above is a very small figure which might be hard for most people to fathom or visualize.

Answer:

100 J

Explanation:

Answer:

answer is 18.6111

you can easily convert km/hr into m/s

just divide it by 3.6

Answer:

It's a cause that's the last layer

Answer:

I believe the answer is A

Explanation:

It is not the ring of fire because the ring of fire is the result of tectonic plates moving. It is not the biosphere because biosphere is the regions of the surface.  The convecting mantle is the solid layer of the Earth because the mantle is mostly solid. The atmosphere is a solid plastic layer of the Earth. I hope this helps.

Answer:

A watt (W) is a joule (J) of energy used or produced per second. In 2010, the average US power use was 3.3 terawatts, or 3,300,000,000,000 watts. A horsepower is a unit of power. 1 horsepower (hp) is 745.7 watts.

extra info

How many watts does it take to make 1 horsepower?

746 watts !

One electric horsepower is equal to exactly 746 watts.

can someone help me with my qustions :(

Answer:

Physics Net Force

Explanation:

Physics Net Force

The net force is the combined force of all individual forces acting on an object. Newton's First Law can be seen to be the special case in the Second Law when F, the net force, is zero. When that happens, the acceleration a must also be zero.

Hope this helped you!!

Answer:I had two questions: 1) Shouldnt the equation be : Change of internal energy= Change in Ke or KEi +Ui=KEf+Uf .. I cant seem to understand how the change in KE+ Change in Internal Energy equals 0 2) Also, it has a note which says that if the bullet alone was chosen as a system, then work would be done on it and the heat transfer woudl occur. How would one formulate an equation for this?

Explanation:

Answer:

118.3 J

Explanation:

Givens:

m = 1.4 kg

V = 13 m/s

Formula for kinetic energy:

KE = (1/2)*(m)*(v)^2

KE = .5*(1.4 kg)*(13 m/s)^2

KE 118.3 J

J = Joules

Answer:

it looks like B on the first one and D on the second hope this helps!!

Explanation:

Answer:    

increase, GPE, KE, KE, KE, PE, PE, KE, KE,

Explanation:

Answer:

ultraviolet rays

Explanation:

It is because it have more photons.

Answer:

v = v +at = 22 + (1.6 6.8 s  ms) = 33 ms

Explanation:

Answer:

concave mirror

Explanation:

Answer:

C- speed

Explanation:

Refraction is the bending of waves caused by a change made in the speed which allows it to move from one medium to another.

Answer:

C. Speed of light

Explanation:

Refraction of light is caused due to change in the speed of light in different mediums. Refraction is the bending of the path of a light wave as it passes from one material into another material. The refraction occurs at the boundary and is caused by a change in speed of light wave upon crossing the boundary

Answer:

Decomposers are organisms that break down dead or decaying organisms, they carry out decomposition, a process possible by only certain kingdoms, such as fungi. Like herbivores and predators, decomposers are heterotrophic, meaning that they use organic substrates to get their energy, carbon and nutrients for growth and development. While the terms decomposer and detritivore are often interchangeably used, detritivores ingest and digest dead matter internally, while decomposers directly absorb nutrients through external chemical and biological processes. Thus, invertebrates such as earthworms, woodlice, and sea cucumbers are technically detritivores, not decomposers, since they must ingest nutrients - they are unable to absorb them externally.

Explanation:

Answer:

It's C

Explanation:

Answer:

• Mass, m = 300 kg

• Area, a = 15 m²

• Acceleration due to gravity, a = 9.8 m/s²

To Find :

• The pressure exerted by the box on the ground

Solution :

We know that,

★ Pressure = Force/Area

For calculation of Pressure we will have to find the force acquired first

From Newton's 2nd law of motion :

★ Force = Mass × Acceleration

→ F = 300 × 9.8

→ F = 2940 Newtons

Put the value of Force in the formula of Pressure :

→ Pressure =  

→ Pressure = 196 Pascals

 The pressure exerted by the box on the ground is 196 Pascals.

Answer:

I TOO DONT UNDERSTAND ☹☹☹☹✌✌✌

Answer:

the answer is 60 w. i hope this helps

Answer:

Consinder the first body

[tex]potential \: energy = mgh \\ = 2 \times 10 \times 10 \\ = 200 \: joules[/tex]

Consider the second body

[tex]potential \: energy = mgh \\ = 4 \times 10 \times 10 \\ = 400 \: joules[/tex]

The body of mass 4 kg had the greater potential energy than the body of 2 kg

Answer:

3MN/m

Explanation:

Step one:

given data

Kinetic Energy KE=15,000J  

mass m= 0.5kg

compression x= 0.1m

Step two:

The expression for the energy stored in spring is

[tex]KE= 1/2ke^2\\\\15000=1/2 *k*0.1^2\\\\15000=1/2*k*0.01\\\\15000=0.005k\\\\[/tex]

divide both sides by

0.005

[tex]k= 15000/0.005\\\\k=3000000\\\\k= 3MN/m[/tex]

From conservation of energy, the value of the spring constant for the tennis ball launcher according to the data is 3 x [tex]10^{6}[/tex] Nm

The work done by a  tennis ball launcher by using a spring to propel the ball forward is equal to the kinetic energy which is 15,000 Joule. That is,

W = K.E

The given parameters are:

K.E = 15,000 J

Mass m = 0.5 kg

compression x = 0.1 m

The elastic potential energy on the spring will be equal to the work done by the tennis ball launcher. That is,

E = W

since W = K.E

E = K.E

1/2k[tex]x^{2}[/tex] = 1/2m[tex]v^{2}[/tex] = 15,000

1/2k[tex]x^{2}[/tex] = 15000

Substitute for 0.1 for x

1/2 K ([tex]0.1^{2}[/tex]) = 15000

[tex]0.1^{2}[/tex] K = 30000

K = 30000/0.01

K = 3 x [tex]10^{6}[/tex] Nm

Therefore,  the value of the spring constant for the tennis ball launcher according to the data is 3 x [tex]10^{6}[/tex] Nm

Learn more about Elasticity here: https://brainly.com/question/9821607

Answer:

The angle of projection is 12.26⁰.

Explanation:

Given;

initial position of the dart, h₀ = 1.50 m

height above the ground reached by the dart, h₁ = 1.73 m

maximum height reached by the dart, Hm = h₁ - h₀ = 1.73 m - 1.50 m= 0.23 m

velocity of the dart, u = 10 m/s

The maximum height reached by the projectile is calculated as;

[tex]H_m = \frac{u^2sin^2 \theta}{2g}[/tex]

where;

θ is angle of projection

g is acceleration due to gravity = 9.8 m/s²

[tex]H_m = \frac{u^2sin^2 \theta}{2g}\\\\sin^2 \theta = \frac{H_m \ \times \ 2g}{u^2} \\\\sin^2 \theta = \frac{0.23 \ \times \ 2(9.8)}{10^2} \\\\sin ^2\theta =0.04508\\\\sin \theta = \sqrt{0.04508} \\\\sin \theta = 0.2123\\\\\theta = sin^{-1}(0.2123)\\\\\theta = 12.26^0[/tex]

Therefore, the angle of projection is 12.26⁰.