What happens in a convection current?

Answer:

Mount Everest, located in Nepal and Tibet, is usually said to be the highest mountain on Earth. Reaching 29,029 feet at its summit, Everest is indeed the highest point above global mean sea level—the average level for the ocean surface from which elevations are measured. But the summit of Mt.

- Ocean Service

Answer:

D. compound. Google says salad dressing is a compound. Sorry if it's wrong.

Explanation:

Answer:

D because those are both concerning.

Answer:

d. Direction and magnitude

Explanation:

The two components of a vector are its magnitude and direction.

Magnitude is the quantity of the substance

Direction is the path.

Examples of vector quantities are velocity, displacement, acceleration.

Answer:

All of the orbits were in the shape of an ellipse, with the orbited body on the inside of the ellipse.

Explanation:

plato

All of the orbits were in the shape of an ellipse, with the orbited body on the inside of the ellipse.

Kepler's three laws describe how planetary bodies orbit the Sun. They describe how

Some orbits are elliptical in shape , Knowing then that the orbits of the planets are elliptical,

Johannes Kepler formulated three laws of planetary motion, which accurately described the motion of comets as well.

Kepler's First Law: each planet's orbit about the Sun is an ellipse.

The Sun's center is always located at one focus of the orbital ellipse.

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Answer:

1.2V

Explanation:

Given parameters:

Resistance  = 4Ω

Current  = 0.3A

Unknown:

Potential difference  = ?

Solution:

To find the potential difference, we use the ohms law;

              V = IR

Now, insert the parameters and solve;

       V = 0.3 x 4  = 1.2V

Answer:

The first law of thermodynamics is the law of conservation of energy. It states that energy is always conserved. ... To keep a machine moving, the energy applied should stay with the machine without any losses. Because of this fact alone, it is impossible to build perpetual motion machines.

Explanation:

Answer:

1) 1.15666

2)1.07

3)1.36

Explanation:

To find the average take the vaules of the numbers and add then divide by how many numbers are in the eqation and that should give you your average.

Answer:

so sorry

don't know but please mark me as brainliest please

Answer:

False

Explanation:

For the vector to remain the same, the magnitude and the direction of the object must be constant. But when an object is travelling in a circular motion, it keeps on accelerating due to the change in direction, even if its motion is uniform. Quite clearly its velicity won't be constant although, its speed might be.

Answer:

The visible form of energy

Explanation:

Watch a video on it, and took test and got it right :)

Answer:

The visible form of energy

Explanation:

Answer:

to get it u have to multiple 6=00 time 89 to get the number 21 than plus it by 22 what is 31

Answer:

The Answer is (A) . . .

I Think . . .

Answer:

a. buoyancy

....................

Answer:

The approximate charge in the cloud is 11 C

(b) 11 C

Explanation:

Given;

electric field strength, E = 1,000 N/C

separation distance, r = 10 km, = 10,000 m

Electric field strength is given by the following equations;

[tex]E = \frac{F}{q} = \frac{kq^2}{r^2}*\frac{1}{q} = \frac{kq}{r^2} \\\\q = \frac{Er^2}{k}[/tex]

where;

k is coulomb's constant = 8.99 x 10⁹ Nm²/C²

[tex]q = \frac{Er^2}{k} \\\\q = \frac{(1000)(10000)^2}{(8.99*10^9)} \\\\q = 11.12 \ C[/tex]

q ≅ 11 C

Therefore, the approximate charge in the cloud is 11 C.

Correct option is "B"

Answer:

V₁ = 5 m/s

This is the problem of one dimension

Explanation:

Before using the concepts of relative velocity, we must first define the variables for each velocity here:

V₁ = Person's Velocity Relative to Pier = ?

V₂ = Boat's Velocity Relative to Pier = 6 m/s

V₁₂ = Person's Velocity Relative to Boat = - 1 m/s

Now, from the relative velocity, we know that:

V₁₂ = V₁ - V₂

- 1 m/s = V₁ - 6 m/s

V₁ = 6 m/s - 1 m/s

V₁ = 5 m/s

This is the problem of one dimension

because, the velocity is along single dimension with opposite directions. No, second dimension is involved.

ANSWER : 20 is the answer

Explanation:

If you take 40, then divide it by 2, you get 20. That is how you do the problem.

Can you please mark brainless? It couldn't hurt? STAY SAFE ! :)

Answer:

Many drivers follow the “three-second rule.” In other words, you should keep three seconds worth of space between your car and the car in front of you in order to maintain a safe following distance.

Thank you and please rate me as brainliest as it will help me to level up

Answer:

Current, [tex]I=45\times 10^3\ A[/tex]

Explanation:

Given that,

Voltage of a battery, V = 9 volts

Resistance, R = 2×10⁻⁴ ohms

We need to find the current flowing in the battery. Let it is I. It can be calculated using Ohm's law as follows :

V = IR

[tex]I=\dfrac{V}{R}\\\\I=\dfrac{9}{2\times 10^{-4}}\\\\I=45000\ A\\\\I=45\times 10^3\ A[/tex]

So, the current is [tex]45\times 10^3\ A[/tex].

Answer:

a. L = μ₀AN²/l b. 1.11 × 10⁻⁷ H

Explanation:

a. The magnetic flux through the solenoid, Ф = NAB where N = number of turns of solenoid, A = cross-sectional area of solenoid and B = magnetic field at center of solenoid = μ₀ni where μ₀ = permeability of free space, n = number of turns per unit length = N/l where l = length of solenoid and i = current in solenoid.

Also, Li = Ф where L = inductance of solenoid.

So, Li = NAB

= NA(μ₀ni)

= NA(μ₀Ni/l)

Li = μ₀AN²i/l

dividing both sides by i, we have

So, L = μ₀AN²/l

b. The self- inductance, L = μ₀AN²/l where

A = πd²/4 where d = diameter of solenoid = 0.150 cm = 1.5 × 10⁻³ m, N = 50 turns, μ₀ = 4π × 10⁻⁷ H/m and l = 5.00 cm = 5 × 10⁻² m

So, L = μ₀AN²/l

L = μ₀πd²N²/4l

L = 4π × 10⁻⁷ H/m × π(1.5 × 10⁻³ m)²(50)²/(4 × 5 × 10⁻² m)

L = 11,103.3 × 10⁻¹¹ H

L = 1.11033 × 10⁻⁷ H

L ≅ 1.11 × 10⁻⁷ H

Answer:

Explanation:

step one:

given

length of stretcher= 2m

weight of stretcher=100N

Wayne weighs =800N

distance of Wayne weighs from chris's end= 75cm= 0.75m

The force that Chris is exerting to support the stretcher, with Wayne on it, can be computed by taking moments of the weight of the stretcher and Wayne weighs  about Chris's end, the end result is the reaction at Chris's end

Taking moment about Chris's end

The moment of Wayne weight 75cm from Chris+ Half the weight of stretcher 1m from Chris

0.75*800+50*1=0

600+50=0

650N

Answer:

56.7kpa

Explanation:

V = 0.0138-m³

M = 4.73g

T = 358k

R = ideal gas constant = 8.314

Number of moles of water n = 4.73/18 = 0.2628 (Remember that the molecular mass of water is 18).

Pv = nRT

P = nRT/V

P = (0.2628x8.314x358)/0.0138

P = 56681.23

P = 56.7Kpa

56.7Kpa is therefore the pressure of the water vapor.

Answer:

The gravity arrow for each body rotates, always pointing toward the other body. Both arrows grow longer when the bodies come closer to one another and shorter when they move farther apart. This change shows that the gravitational force is stronger the closer together the bodies are.

Explanation:

A gravitational field is a model used in physics to explain the effects that a large thing has on the area surrounding it, exerting a force on smaller, less massive bodies. Thus, a gravitational field—measured in newtons per kilogram (N/kg)—is employed to describe gravitational processes.

Each body's gravity arrow spins while constantly pointing in the direction of the other body. When the bodies move apart, the arrows go shorter and get longer as they get closer together. This modification demonstrates that the gravitational force increases with increasing body proximity.

Therefore, All objects with mass are attracted to one another by the gravitational attraction. Which has a magnitude that is directly proportional to the masses of the two objects and inversely proportional to the square of their distance from one another.

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Answer:

A and B.

Explanation:

Answer C is wrong - there are no tall trees underwater

Answer D is wrong, there are mountain chains underwater due to plate tectonics.

Answer:

Explanation:

According to Bernoulli's principle

P₁ + 1/2ρ v₁² + ρgh₁ = P₂ + 1/2ρ v₂² + ρgh₂  , ρ is density of air . P₁ , P₂ are pressures at two surfaces .

h₁ = h₂

P₁ - P₂ =  1/2ρ( v₂² -   v₁² ) = Lift pressure

ρ of air = 1.225 kg / m³

P₁ - P₂ =  1/2ρ( v₂² -   v₁² )

= .5 x 1.225 ( 260² - 170² )

=  .5 x 1.225 ( 67600- 28900 )

= 23703.75 N/m²

Lift Force = pressure x area

= 23703.75 x 87

= 2062226.25 N .

Answer:

(A) q/m = 9.58 x 10⁷ C/kg

(B) b. Proton

Explanation:

(A)

In order to pass un-deflected between magnetic and electric field both electric and magnetic forces must be equal:

Felectric = Fmagnetic

Eq = Bqv

v = E/B   ------------ equation (1)

Now, when the particle forms semi-circle under influence of magnetic field. At this, point magnetic field is equal to centripetal force:

Centripetal Force = Magnetic Force

mv²/r = qvB

mv = qrB

v = qrB/m   ------------ equation (2)

comparing equation (1) and equation (2), we get:

E/B = qrB/m

q/m = E/B²r

where,

q/m = charge to mass ratio = ?

E = Electric Field = 187500 V/m

B = Magnetic Field = 0.125 T

r = radius of circular path = 25.05 cm/2 = 12.525 cm = 0.12525 m

Therefore,

q/m = (187500 V/m)/(0.125 T)²(0.12525 m)

q/m = 9.58 x 10⁷ C/kg

(B)

This is the charge to mass ration of a proton:

q/m = 1.6 x 10⁻¹⁹ C/1.67 x 10⁻²⁷ kg

q/m =  9.58 x 10⁷ C/kg

Therefore, correct option is:

b. proton

Answer:

If you see images of a gas stove burner, pinto beans, fruits & vegetables, and grain, then the answer is A or 1.

Explanation:

Explanation:

A position time graph gives the velocity of an object. Its slope gives the velocity of an object.

In the given figure, the distance covered by an object decreases with respect to time. It means the speed decreases uniformly. So, the object is decelerating. Hence, the correct option is (b).

Answer:

The object has positive velocity

Explanation:

The steeper the slope, the greater the velocity. For example, an object moving 50 m/s, east, will have a steeper slope than an object moving 25 m/s, east. The shape of the line also describes the object's motion. A straight line indicates an object with no acceleration. The object is moving at a constant velocity. A curved line indicates an object with a changing velocity. In other words, a curved line indicates acceleration. A completely horizontal line represents an object with zero velocity. The object is not moving.