The earths orbit is oval in shape. Explain how the magnitude of the gravitational force between the earth and the sun change as the earth moves from position to a to b

Answer:

880,000 J

Explanation:

P = W/t

4400 W = W / 200 s

W = 880,000 J

Answer:

880,000 J

Explanation:

Answer:

83.33s

Explanation:

velocity=300km/hr ,acceleration =1m/s2

But before we can make this calculation,we have to make sure that both the acceleration and velocity are in the same units.So I decided to Chang the velocity to m/s.

Converting 300km/hr into m/s;

Changing 300km into m=300000m

Changing 1hr into secs=3600sec

Velocity in m/s=83.33m/s

But Time =velocity/acceleration

=83.33/1

=83.33sec

You have to decide what you want.  Your question says "Find the average velocity", but the choices you listed are all times, not velocities.

(300 km/hr) x (1 hr / 3600 sec) = 83.33 meters/sec

-- If the airplane starts from rest and accelerates uniformly at 1 m/s², it'll take 83.33 seconds to reach takeoff speed.

-- If it starts from rest and accelerates uniformly to 83.33 m/s, then its average speed is 41.67 m/s no matter what its acceleration may be.

Answer:

While filling up the gas, a static discharge can take place which is really dangerous for us. It can even ignite a fire at the gas station. Touching the metal pole or any conductor will pass all of the charge into the Earth and thus we'll keep safe.

Answer:

It is a good idea to touch a metal pole or similar conductor before filling up a car with gas because it will discharge any static electricity on you, making it safer for everyone.

Explanation:

Answer:

a.) L = 2.64 kgm^2/s

b.) V = 4.4 m/s

Explanation: Jessica stretches her arms out 0.60 m from the center of her body. This will be considered as radius.

So,

Radius r = 0.6 m

Mass M = 2 kg

Velocity V = 1.1 m/s

Angular momentum L can be expressed as;

L = MVr

Substitute all the parameters into the formula

L = 2 × 1.1 × 0.6 = 1.32kgm^2s^-1

the combined angular momentum of the masses will be 2 × 1.32 = 2.64 kgm^2s-1

b. If she pulls her arms into 0.15 m,

New radius = 0.15 m

Using the same formula again

L = 2( MVr)

2.64 = 2( 2 × V × 0.15 )

1.32 = 0.3 V

V = 1.32/0.3

V = 4.4 m/s

Her new linear speed will be 4.4 m/s

Answer:

78 cm³

Explanation:

The Volume Immersed = (density of object/ density of fluid) x Volume of Object

Vi = (7800/13600) x 136 = 78 cm³

Answer:

Pressure, P = 32666.66 Pa

Explanation:

It is given that,

Surface area of foot of Bimaba is 150 cm² or 0.015 m².

Her weight is 50 kg

We need to find the pressure does she exert on the ground, as she stands on  her one foot. The force acting per unit area is called pressure. It can be given by :

[tex]P=\dfrac{F}{A}\\\\P=\dfrac{mg}{A}\\\\P=\dfrac{50\times 9.8}{0.015}\\\\P=32666.66\ Pa[/tex]

So, the pressure is 32666.66 Pa.

Answer:

i. + 22.5 m ii. 4.0 m

Explanation:

i. Image distance

Using the lens formula

1/u + 1/v = 1/f where f = focal length = + 18.0 m, u = object distance = distance of shark away from lens = + 90.0 m and v = image distance from lens = unknown

So, we find v

1/v = 1/f - 1/u

= 1/+18 - 1/+90

= (5 - 1)/90

= 4/90

v = 90/4

= + 22.5 m

So the image is real and formed 22.5 m away on the other side of the lens.

ii Length of Shark

Using the magnification formula, m = image height/object height = image distance/object distance. image height = 1.0 m where object height = length of shark.

m = image distance/object distance

= v/u

= +22.5/+90

= 0.25

0.25 = image height/object height

So,

object height = image height/0.25

= 1.0 m/0.25

= 4.0 m

So, the length of the shark is 4.0 m

Answer:

The correct answer to the following question will be "An ecosystem".

Explanation:

So that the above seems to be the right answer.

Answer:

force (tension) of 29.4 N (upward)  in 100 cm

force (tension) of 58.4 N (upward)  in 200 cm

Explanation:

Given:

Length of tube = 5 m (500 cm)

Mass of tube = 9

Suspended vertically from 150 cm and 50 cm.

Computation:

Force = Mass × gravity acceleration.

Force = 9.8 x 9

Force = 88.2 N

So,

Upward forces = Downward forces

D1 = 150 - 50 = 100 cm

D2 = 150 + 50 = 200 cm

And F1 = F2

F1 x D1 = F2 x D2

F1 x 100 = F2 x 200

F = 2F

Total force = Upward forces + Downward forces

3F = 88.2

F = 29.4 and 2F = 58.8 N

force (tension) of 29.4 N (upward)  in 100 cm

force (tension) of 58.4 N (upward)  in 200 cm

Answer:Covalent bond

Explanation:

Answer:

mass of the solid is 10.8kg

Explanation:

Weight of the solid=w=18.36N

Force of gravity on the surface of the moon=g=1.71Nkg^-1

Mass of the solid on the moon=m=?

as we know that

weight=mass×force of gravity

here we have to find the mass

[tex]\frac{weight}{force of gravity}[/tex]=mass

mass=[tex]\frac{18.36N}{1.7Nkg^-1}[/tex]

Mass of the solid=10.8kg

i hope it will help you

Answer: c.mesosphere

Explanation: Temperatures can reach lows of -90 degrees Celsius in the mesosphere, making it the coldest layer of the earth's atmosphere. The mesosphere extends above the stratosphere and ranges from 50 km to 87 km above the surface.

Answer:

Check Explanation

The fission reactions include

239 Pu + n → Ce + Kr + 2n

And

295 Am + in → 154 La + 95 Sr + 3 n

Explanation:

A fission reaction is a radioactive reaction in which an atom with a heavy nuclei splits into atoms with smaller or lighter nuclei usually brought about by the attack of a fundamental particle and accompanied by the release of some fundamental particles (neutrons mostly) and energy.

Although, the reactions to be examined aren't totally clear, we can still guess which element is which and know which of the reactions has a heavier nuclei splitting into smaller ones.

1) H + H → He + 2n

Two hydrogen atoms combine to give an helium atom and release neutrons too, showing that here, smaller molecules combine to form a bigger one. Hence, this isn't a fission reaction, rather, it's a fusion reaction.

2) 239 Pu + n → Ce + Kr + 2n

Here, Pu (Plutonium, atomic mass 239), a heavy nuclei that splits into smaller nuclei, Ce (Cerium, atomic mass 140) and Kr (Krypton, atomic mass 84) together with some neutrons to fit the definition of a fission reaction. Hence, this reaction is a fission reaction.

3) 295 Am + n → 154 La + 95 Sr + 3 n

Here, Pu (Americium, atomic mass 295), a heavy nuclei that splits into smaller nuclei, Ce (Lamthanium, atomic mass 154) and Sr (Strontium, atomic mass 95) together with some neutrons to fit the definition of a fission reaction. Hence, this reaction is a fission reaction.

4) 13C + H → 14N

Carbon 13 combines with a hydrogen element to mutate and give nitrogen-14, a heavier nuclei, showing all signs of a nuclear fission and not fission.

Hope this Helps!!!

Answer:

b and c

Explanation:

got it correct on edg

Answer:

1. factor that is dependent on the length of the material.

2. factor that is dependent on the area of the material

Explanation:

Resistance R is directly proportional to its length L of an object and it is inversely proportional to the crossectional area of that object.

Mathematically, this is represented as:

a) Resistance R is directly proportional to its length L of an object

R ∝ L ......... Equation 1

b) Resistance R is inversely proportional to the crossectional area (A) of an object

R ∝ 1/A ............ Equation 2

Combining the two equations together, we have:

Resistance R is directly proportional to its length L of an object

R ∝ L/A .......... Equation 3

Resistivity of a material is the natural or inherent or intrinsic property that a material has. The Resistivity of a material is not dependent on the length or crossectional area of such material. It is only temperature dependent.

The resistance of a material is also dependent on the resistivity of the material. This means the resistance of a material is directly proportional to the resistivity of the material.

R ∝ ρ........Equation 4

Combining Equation 4 and 3 together, we have:

R = ρL/A

Where:

R = Resistance

ρ = Resistivity

L = Length of the material

A = Crossectional area of the material

Resistance and resistivity are related by a factor that is dependent on the length of the material a factor that is dependent on the area of the material

Answer:yess

Explanation:as weather balloons travels from the earth's surface, the air pressure around ballons decreases slowly.As the air gets thinner,the gallons casing gets tighter.

This is due to gas expanding within balloon.The expanding gas causes the balloons to reach maximum height and it burst.

Answer:

The property of sugar which makes it different from sand is that sugar can dissolve in water. Explanation: however the power of dissolving of sand is not present. This is due to the presence of interaction between sugar and water.

Explanation:

I hope that was useful

Answer: angle of incidence

Answer:

A) angle of incidence

Explanation:

Answer:

35.5 ml

Explanation:

The other guy made me get the question wrong lol here ya go good luck

Answer:

m = 3 kg

Explanation:

It is given that,

Initial speed of a ball is 5 m/s, u = 5 m/s

Final speed of a ball is 4 m/s, v = 4 m/s (as it bounces)

Impulse provided by the wall is -3 N-m (impulse is provided in opposite direction)

We need to find the mass of the ball. Impulse provided to an object is given by the change in its momentum as :

J = m(v-u)

m is mass of the ball

[tex]m=\dfrac{J}{(v-u)}\\\\m=\dfrac{-3}{(4-5)} \\\\m=3\ kg[/tex]

So, the mass of the ball is 3 kg.

Answer:

Comprobar explicación

Explanation:

Si el árbitro toma una decisión en el medio del juego, a pesar de estar equivocado, normalmente, como humano, las emociones están destinadas a superarlo, pero de acuerdo con el reglamento, hay conductas aceptables y una protesta llena de emociones. en el árbitro puede salirse de las manos y conducir a más castigos de acuerdo con los libros de reglas.

Después del partido, por lo general, aún me despediría y expresaría mi desagrado tan cortésmente como pueda, pero porque cuando uno se equivoca, las emociones que lo acompañan pueden volverse increíblemente incontrolables, por lo tanto, es mejor mantener el control y no obtener castigado aún más.

¡¡¡Espero que esto ayude!!!

Answer:

a) The baseball spends 0.674 seconds in the air

b) The horizontal distance from the roof edge to the point where the baseball lands on the ground = 2.02 m

Explanation:

The ball's initial speed, u = 3.8 m/s

θ = 38°

The edge of the roof has a height, H = 3.30 m

The vertical motion of the baseball can be given by the equation:

[tex]H = U_{y} t + 0.5a_{y} t^{2}[/tex].........(1)

Vertical acceleration of the baseball, [tex]a_y = 9.8 m/s^2[/tex]

The vertical component of the initial speed can be calculated by:

[tex]U_y = Usin \theta\\U_y = 3.8 sin 38\\U_y = 2.34 m/s[/tex]

Substituting the appropriate values into equation (1):

[tex]3.8 = 2.34 t + 0.5(9.8)} t^{2}\\4.9t^2 + 2.34t - 3.8 = 0[/tex]

Solving for t in the quadratic equation above:

t = 0.674 s

To calculate the horizontal distance, S, use the formula below:

[tex]S = U_xt + 0.5a_xt^2[/tex]

Horizontal acceleration of the baseball, [tex]a_x = 0 m/s^2[/tex]

The horizontal component of the initial speed can be calculated as:

[tex]U_x = Ucos \theta\\U_x = 3.8 cos 38\\ U_x = 2.99 m/s[/tex]

S = 2.99(0.674) + 0.5(0)

S = 2.02 m

Answer: it is called a open circuit

Explanation:

fdi9bn 08989089089008i uuuuuuri9ij

Answer:

The temperature remains constant

Explanation:

From the radiation law, the net energy radiated P = Power radiated - Power absorbed

Now, let the body be at a temperature T₁ above its surroundings, the rate at which energy is given of is  P₁ = σεAT₁⁴

let T₂ be the temperature of its surroundings, the rate at which energy is absorbed is P₂ = σεAT₂⁴

The net energy radiated (Power radiated) P = P₂ - P₁ = σεAT₂⁴ - σεAT₁⁴ = σεA(T₂⁴ - T₁⁴)

Now, if the object absorbs energy at the same rate it gives off energy, P₁ = P₂ and P = 0.

So, σεA(T₂⁴ - T₁⁴) = 0

Since σεA ≠ 0 then (T₂⁴ - T₁⁴) = 0 ⇒ T₂ = T₁

Since there is no temperature difference, the temperature of the object remains constant.

Answer:

Option A

Explanation:

A. A ball is dropped from a height and hits the ground with a high speed. As this is a ball, it has elastic energy, so upon impact on the ground the kinetic energy can 1. go into making sound upon impact, or 2. go into making the ball bounce upward again. There may by more possible energy transfers, but this is what should occur in like conditions. Now it didn't mention that the ball transfers energy as such, only that the ball hits the ground at high speed. Thus, this statement does not explicitly describe a transfer of energy.

_______________________________________________________

Just to confirm that this is the correct answer, take a look at the other options. Option B states that the energy from the collision is transferred to heat, not in those exact words but still is given. Option C states that the plane increases speed, most likely transferring energy to the atmosphere, in the form sound. In option d the electricity causes the fan to turn, an explicit statement of the transfer of energy.

Hope that helps!

Answer:

kinetic energy is proportional to the velocity squared, increases in velocity will have an exponentially greater effect on translational kinetic energy. Doubling the mass of an object will only double its kinetic energy, but doubling the velocity of the object will quadruple its velocity.

pls mark as branliest

Answer:

this relationship to be true the value  x ’must be positive, so it must move to the right.

Explanation:

En este ejercicio debemos utilizar la relacion de equilibrio rotacional.

Fijemos un sistema de referencia situado en el eje de jiro del sistema y la rotación antihoraria es positiva.

Las esferas estan a la izquierda y el contrapeso ala derecha

                W d = w_contrapeso  x

donde W es el peso de las esferas de d su distancia hasta eleje de giro

Ahora colocamos la carga negativa debajo de la esfera A, como las cargas son de diferente signo  las dos esferas se atraen, lo que crea una fuerza hacia bajos de magnitud

       F =k q₁ q₂/r²

       F =8,9 10⁹  1 2/ (2d)²

       F = 4,45/d²  N

volvamos escribir la ecuación de equilibrio rotacional con esta fuerza

          F d + W d = W_contrapeso (x+x’)

          (4,45 10⁹ /d²) d + W d = W_conrapeso x+ W contrapesos x’

en la primera ecuación vimos que  dos terminos se igualan ,por lo cual se anulan quedando  

          4,45 10⁹/d = W contrapeso x’

para que esta relación sea cierta el valor e x’ debe ser positivo, por lo cual debe moverse a la derecha.  

Traduction

In this exercise we must use the relationship of rotational equilibrium.

Let's fix a frame of reference located on the system's axis of rotation and the counterclockwise rotation is positive.

The spheres are on the left and the counterweight on the right

                W d = w_counterweight x

where W is the weight of the spheres of d its distance to the turning axis

Now we place the negative charge under sphere A, as the charges are of different sign the two spheres attract, which creates a downward force of magnitude

       F = k q₁ q₂ / r²

       F = 8.9 10⁹ 1  2 / (2d)²

       F = 4.45 / d² N

let's rewrite the rotational equilibrium equation with this force

          F d + W d = W_ counterweight (x + x ’)

          (4.45 10⁹ / d²) d + W d = W_counterweight x + W counterweights x’

In the first equation we saw that two tenunos are equal, which is why they cancel, leaving

          4.45 10⁹ / d = W counterweight  x ’

for this relationship to be true the value  x ’must be positive, so it must move to the right.

Answer:

Compression

Explanation:

I would think it would be compression because you are compressing the marshmallow, and pushing it down until its compact.

Answer: Compression, I to had to get an answer for this but imma help you out :)

Answer: I maybe wrong but i'm pretty sure its C) Kinetic energy

Answer & explanation: