i need help with this question really urgent

Answer:

Hello your question is poorly written hence I will just give the difference between conduction and convection

answer :

Conduction occurs when there is direct contact between solids and source of heat. while convection occurs when there is transfer of thermal energy due to movement of liquid or gas

Explanation:

when a pot of water is placed on a hot stove the pot is heated through conduction because the metal pot is in direct conduct with the heat from the stove ( which is the primary source of heat in this scenerio ).

while the heat transfer from the hot pot to the water is executed through convection this is because heat transfer via convection requires the movement of liquid or gas.  as the warmer liquid moves over to the top the cooler liquid goes below inside the pot that way the whole liquid becomes warm .

Answer:

In an year about 6 major hurricanes and 3 minor storms occurs.

Explanation:

Answer:

 W = 500 J

Explanation:

Work is defined by

         W = F . x

if we develop the dot product

         W = F x cos θ

where is the angle between the force and the displacement, in this case the angle is zero, so cos 0 = 1

          W = F x

indicate that each person applies a force of 500 N, so the total force is

         F = 1000 N

let's reduce the distance to the SI system

          x = 50 cm = 0.50 m

let's calculate

          W = 1000 0.50

          W = 500 J

Answer:

P = 1 D

f = 1 m = 100 cm

Explanation:

The power of the combination of lenses is simply found out by adding the power of the individual lens:

[tex]P = P_{1}+P_{2}[/tex]

where,

P = Power of combination of lenses = ?

P₁ = Power of first lens = 3.5 D

P₂ = Power of second lens = -2.5 D

Therefore,

[tex]P = 3.5\ D - 2.5\ D[/tex]

P = 1 D

Now, for focal length:

[tex]Focal\ Length = f = \frac{1}{D}\\\\f = \frac{1}{1\ D}[/tex]

f = 1 m = 100 cm

Answer:

TINAAA

Explanation:

Answer:

the strength of the magnetic field inside the solenoid is 6.278 x 10⁻³ T.

Explanation:

Given;

length of the wire, = 34.9 m

length of solenoid, L = 0.24 m

radius of the solenoid, r = 0.051 m

current in the solenoid, I = 11.0 A

The number of turns of the wire is calculated as follow;

[tex]N = \frac{34.9}{2\pi \times 0.051} = 109 \ turns[/tex]

The strength of the magnetic field inside the solenoid is calculated as follows;

[tex]B = \mu_0 (\frac{N}{L} )I\\\\B = 4\pi \times 10^{-7} \times (\frac{109}{0.24} )\times 11.0 \\\\B = 6.278 \times 10^{-3} \ T[/tex]

Therefore, the strength of the magnetic field inside the solenoid is 6.278 x 10⁻³ T.

Answer:

Velocity of the car at the bottom of the slope: approximately [tex]20.3\; \rm m \cdot s^{-2}[/tex].

It would take approximately [tex]3.9\; \rm s[/tex] for the car to travel from the top of the slope to the bottom.

Explanation:

The time of the travel needs to be found. Hence, make use of the SUVAT equation that does not include time.

[tex]v^2 - u^2 = 2\, a\cdot x[/tex].

Given:

Rearrange the equation [tex]v^2 - u^2 = 2\, a\cdot x[/tex] and solve for [tex]v[/tex]:

[tex]\begin{aligned}v &= \sqrt{2\, a \cdot x + u^2} \\ &= \sqrt{2 \times 4.5\; \rm m \cdot s^{-2} \times 45\; \rm m + \left(3\; \rm m \cdot s^{-1}\right)^{2}} \\ &\approx 20.3\; \rm m \cdot s^{-1}\end{aligned}[/tex].

Calculate the time required for reaching this speed from [tex]u = 3\; \rm m \cdot s^{-1}[/tex] at [tex]a = 4.5\; \rm m \cdot s^{-2}[/tex]:

[tex]\begin{aligned}t &= \frac{v - u}{a} \\ &\approx \frac{20.3\; \rm m \cdot s^{-1} - 3\; \rm m \cdot s^{-1}}{4.5\; \rm m \cdot s^{-2}} \approx 3.9\; \rm m \cdot s^{-1}\end{aligned}[/tex].

which class question is this

Answer:

2.00

Explanation:

Move the sinθ to the right.

Answer:

The big rig.

Explanation:

Momentum can be defined as the multiplication (product) of the mass possessed by an object and its velocity. Momentum is considered to be a vector quantity because it has both magnitude and direction.

Mathematically, momentum is given by the formula;

[tex] Momentum = mass * velocity [/tex]

In this scenario, a motorcycle, a car, and a big rig are all moving with a velocity of 100 km/h. Thus, the vehicle which has the greatest momentum is the big rig because its mass is intuitively or logically greater than that of the other vehicle.

Generally, momentum is directly proportional to the mass of a physical object or body.

Answer: A large 18 wheeler truck.

Explanation: Momentum is the measure of the motion of an object found by multiplying the object’s mass and velocity. Momentum is directly proportional to the object's mass and also its velocity. So, the greater an object's mass or the greater its velocity, the greater its momentum. Therefore, since the truck is bigger, it has the greatest mass. This means that the truck the greatest momentum. Correct on Edg 2020.

PLEASE GIVE BRAINLIEST AND RATE MY ANSWER  :)

Answer:

I'm not sure but, this video's pretty cool: gestyy.com/eyRkH2

Explanation:

Answer:

The answers to this question is:

1. inner ear

2. outer ear

3. middle ear

Explanation:

Hope that helps!

Answer:

inner, outer, middle

Explanation:

Answer:

the resistance of the wire is 1.4 x 10⁻³ ohms.

Explanation:

Given;

resistivity of the wire, ρ = 4.9 x 10⁻⁴ ohms.mm

cross sectional area of the wire, A = 0.7 mm²

length of wire, L = 2 mm

The resistance of the wire is calculated as follows;

[tex]R = \frac{\rho L}{A} \\\\R = \frac{4.9 \times 10^{-4} \times 2}{0.7} \\\\R = 1.4\times 10^{-3} \ ohms[/tex]

Therefore, the resistance of the wire is 1.4 x 10⁻³ ohms.

Answer:

I would say the beaker with less water.

Explanation:

I was say this because while they are the same temperature the beaker with more water still has to fluctuate the heat or cold. They do this at the same speed but since there is less water in one beaker it finishes faster where as the beaker with more water will finish later.

Answer:

Find answers below.

Explanation:

Velocity can be defined as the rate of change in displacement (distance) with time. Velocity is a vector quantity and as such it has both magnitude and direction.

Mathematically, velocity is given by the equation;

[tex]Velocity = \frac{distance}{time}[/tex]

Speed can be defined as distance covered per unit time. Speed is a scalar quantity and as such it has magnitude but no direction.

Mathematically, speed is given by the formula;

[tex]Speed = \frac{distance}{time}[/tex]

1. Speed: Jackson ran 5k in 24 minutes.

2. Velocity: A storm is travelling 25 km/hour eastward.

3. Speed: John walked 420 m in 17.5 seconds.

4. Velocity: Zart moved the desk 34 cm to the left.

5. Speed: A hurricane travels 360 km in 15 hours.

6. Speed: Meredith runs 400 meters in 50 seconds.

7. Velocity: Stephen Jay swims 110 m towards the shore in 72 seconds.

8. Velocity: Vince throws a baseball 38 m from third base to first base in 1.7 seconds.

Answer: A child jumping off of a swing set

Explanation: A projectile is any object thrown into the air, so the child is the only thing in the air thats moving.

Answer:

Graph A

Explanation:

I hope this is right

Answer:

F = 7.50 10⁻⁶ N

Explanation:

The force of attraction between two bodies is given by the law of universal gravitation

          F = [tex]G \frac{m_1m_2}{r^2}[/tex]

where m₁ and m₂ are the masses of the hides, r the distance that separates them and G the constant of attraction that is worth 6.67 10⁻¹¹  N m²/kg²

let's calculate

          F = 6.67 10⁻¹¹   500  900/2²

          F = 7.50 10⁻⁶ N

Answer: A woman holds a steaming mug

Explanation:

Just did it

Answer:

The total she has to pay is R8500 plus the 5% interest.

PLEASE ADD BRAINEEST

Answer:

A: Place the ball in the plastic bag, and twist the top so the ball is secure in the bag. Wrap the twisted portion with tape so it stays tight. Use the hole punch or scissors to poke a hole in the part of the bag that’s above the ball. Slip an end of the string through the hole, and tie a knot. This is your pendulum. Hold the loose end of the string still with one hand. With the other hand, raise the ball in an arc so that it’s almost level with the hand holding the string. With the string taut, let the ball go. What do you observe?

Mine was swaying perfectly fine. after a little bit it gradually started swinging slower until stopped.

B: Why did the pendulum stop swinging? Where did the energy go?

gravity was pulling it towards the ground, however the weight and momentum of the ball helped it keep swinging for a good while.

C: Scientists have organized all forms of energy into two types—kinetic and potential. Kinetic [THE ENERGY OF MOTION IN A BODY] energy is the energy of motion, and potential energy [THE STORED ENERGY IN AN OBJECT] is stored energy. At the top of its swing, does the pendulum have kinetic or potential energy?

when its at the very top of the swing it does have a very small amount of time until it starts going back down again but during that time it is potential energy

D: At the bottom of its swing, does the pendulum have kinetic or potential energy?

the pendulum still has kinetic energy when it is the closest to the ground since it is still swinging

E: Think about the process of raising the pendulum to one side and letting it go. For this event, create a list of each form of energy associated with the pendulum as it cycles.

when its in my hand: potential energy

when it starts swinging: kinetic energy

when its going upwards: kinetic energy

when it stops swinging: potential energy

F: How could you give the pendulum more energy?

one way you could possibly make it have more energy is if you make the string longer

G: Now raise the pendulum and let it hit a metal lid or pan. When the ball strikes the lid, what forms of energy can you identify?

I could hear sound energy when the two made contact but for the most part it was kinetic energy

Answer:

I could hear sound energy when the two made contact but for the most part it was kinetic energy

Explanation:

Answer:

The Acceleration of the object = 6.4 m/s²

Explanation:

Mass of block (m) = 5 kg

Action force on block, (F₁) = 40 N

To Find:

Acceleration of the object (a) = ?

Required solution:

Frictional force opposing the motion (F₂) = 8 N

Here in this question we have to find Acceleration of the object. So, firstly we have to find Net force of block after that we will find Acceleration of the object on the basis of conditions given above

⇒ Net force = Action force on block - Opposing friction force

⇒ F = F₁ - F₂

⇒ F = 40 - 8

⇒ F = 32 N

Now, we have to two elements that used in formula, Net force and Mass of block.

Net force of the block (F) = 32 N

Mass of block (m) = 5 kg

And we have to find Acceleration of the object.

We can find Acceleration of the object by using the Second law of Newton which says F = ma

Here,

F is the Force in N.

m is the Mass in kg.

a is the Acceleration in m/s².

So let's find Acceleration (a) !

† From second law of Newton

⇛ F = ma

⇛ a = F/m

⇛ a = 32/5

⇛ a = 6.4 m/s²

Answer:

Description.

Explanation:

Motion can be defined as a change in the location (position) of a physical object or body with respect to a reference point.

This ultimately implies that, motion would occur as a result of a change in location (position) of an object with respect to a reference point or frame of reference i.e where it was standing before the effect of an external force.

Mathematically, the motion of an object is described in terms of acceleration, time, distance, speed, velocity, displacement, position, etc.

A reference point refers to a location or physical object from which the motion (movement) of another physical object or body can be determined.

For example, a point on a map is considered to be a reference point because it represents the starting point of an object or person in motion.

Hence, if the reference point changes, the description of position changes, but the actual position does not change.

Answer:

YES

Explanation:

Asexual means the plant is identical to the parent

Answer:

true

Explanation: Asexual reproduction produces plants that are genetically identical to the parent plant because no mixing of male and female gametes takes place.

Answer:

71%

Explanation:

Answer:

I do have a pet

Explanation:

his name is shadow and he's a cat

Answer:

False

Explanation:

The outer part of the Earth that is hard and solid is termed as lithosphere. It is the outermost part of the Earth's surface. The lithosphere covered under the oceans is the oceanic lithosphere while the lithosphere comprising the continental area is the continental lithosphere. Oceanic lithosphere is denser than the continental lithosphere because of the thin layer of the Earth that exists under the oceans.

Answer:

In the language of science, a theory is an explanation of why and how things happen. For gravity, we use Einstein's Theory of General Relativity to explain why things fall. ...While laws rarely change, theories change frequently as new evidence is discoevered.

Answer:

flows quickly and needs to be like paper

Answer:

c

Explanation:

it flows very quickly since it has a low viscosity