I only need the answers for 7 and 8! No need to write a sentence on what it’s about. ( sorry if the picture is small) thank you <3

Answer:

Plastic, rubber, wood, and ceramics are good insulators. These are often used to make kitchen utensils, such as saucepan handles, to stop heat from flowing up to burn the cook's hand. Plastic coating is also used to cover most electrical wires in appliances. Air is also a good insulator of heat.

Answer:

look at the picture i have sent

Answer:

solution given:

frequency[f]=215.0Hz

velocity[V]=x

wave length=2.4m

we have

wave length=[tex] \frac{V}{f} [/tex]

2.4m=[tex] \frac{x}{215} [/tex]

2.4×215=[tex] \frac{x}{} [/tex]

x=516 m/s

velocity=speed =516m/s

Answer:

1. Distance, S = 26.58 meters

2. Acceleration of gravity, g = 58.60 m/s²

Explanation:

1. Given the following data;

Initial velocity = 4.66 m/s

Acceleration = 5.66 m/s²

Time = 2.35 seconds

To find the distance travelled by the object, we would use the second equation of motion;

S = ut + ½at²

Where;

S represents the displacement or height measured in meters.

u represents the initial velocity measured in meters per seconds.

t represents the time measured in seconds.

a represents acceleration measured in meters per seconds square.

Substituting into the equation, we have;

S = 4.66*2.35 + ½*5.66*2.35²

S = 10.951 + (2.83 * 5.5225)

S = 10.951 + 15.629

S = 26.58 meters

2. Given the following data;

Displacement (height) = 1.55 m

Time, t = 0.23 seconds

To find the acceleration of gravity, we would use the following formula;

Height = ½gt²

Substituting into the formula, we have;

1.55 = ½ * g * 0.23²

1.55 = ½ * g * 0.0529

1.55 = 0.02645g

Acceleration of gravity, g = 1.55/0.02645

Acceleration of gravity, g = 58.60 m/s²

Answer:

No, you couldn't function the same as you do now.

Explanation:

This is because each cell follows individual tasks, and makes up specific parts of a body. For example, if all of your cells were those of an eye, you would be missing the components of arms, legs, etc.

Answer: No

Explanation: If all the cells of our body were of the same size, shape and volume, then they would all perform the same function and the multitude of other important functions cannot be carried out, without which human life itself would not be possible.

Answer:

Equivalent resistance of the circuit is 116 ohm.

Explanation:

Finding the equivalent resistance of the circuit. Since, 29 ohm resistors are connected in series, so

→ Equivalent resistance = R_1 + R_2 + R_3 + R_4

→ Equivalent resistance = (29 + 29 + 29 + 29) ohm

Answer:

I think the answer is C/ Tell me If you got it right

Answer:

let the voltages of the cell be V and R the equivalent resistance of the circuit.

I1=RV∵ only one cell connected  ;

I2=RV+V=R2V∵ two cells connected in series  ;

I3=RV+RV=R2V∵ two cells connected in parallel ⇒ total current is same as sum of the currents due to each.

Now , 

LHS = 3I3I2=3R2VR2V=3(R24V2) 

RHS = 2I3(I1+I2)=2R2V(RV+R2V)=2R2VR3V=3R2therefore, LHS = RHS   

Answer:

1. Plateau where the temperature stays constant

2. Melting

3. Boiling points of the substance

Explanation:

The relationship between kinetic energy and temperature is given as follows;

[tex]\overline E = \dfrac{3}{2} \times \dfrac{R}{N_A} \times T[/tex]

Where;

[tex]\overline E[/tex] = The average kinetic energy of the atom

R = The universal gas constant

[tex]N_A[/tex] = Avogadro's number

T = The temperature in Kelvin

Therefore, the kinetic energy increases as the temperature increases, however when the energy is not being converted into kinetic energy, the energy is stored as internal potential energy in the melted or evaporated state of the substance

Therefore, we have;

If energy is going into a system, but not being converted into kinetic energy, it will be converted into potential energy. This will be represented by a 1. plateau where the temperature stays constant on a heating curve, which occur at the 2. melting and 3. boiling points of the substance.

Answer:

A

Explanation:

Answer:

it is going 1.894miles in 25 hours so it travels 0.07576 miles per hour

Answer:

Distance is directly proportional to the velocity

Explanation:

In 1929, Edwin Hubble's wrote an article that talked about relationship between the distance and recession speed/velocity of galaxies which led to what is known as the Hubble Law. This law states that galaxies are moving away from the earth at velocities proportional to their distances.

Thus is written as;

v = H_o•d

Where;

v is velocity

d is distance

H_o is Hubble's constant rate of cosmic expansion.

He came to this conclusion by generating a graph known as Hubble's classic graph which was a graph of observed velocity vs distance for nearby galaxies.

Answer:

P= 720 watt

Explanation:

P= IV

P= (6)(120)

P= 720 watt

Answer:

[tex] \frac{V}{T} = \frac{V'}{T'}[/tex]

Explanation:

Given the following data;

Original volume = V

New volume = V'

Original temperature = T

New temperature = T'

To write an expression for Charles's law;

Charles states that when the pressure of an ideal gas is kept constant, the volume of the gas is directly proportional to the absolute temperature of the gas.

Mathematically, Charles law is given by the formula;

[tex] \frac {V}{T} = K[/tex]

[tex] \frac{V}{T} = \frac{V'}{T'}[/tex]

Answer:

The internal combustion engine in the car converts the potential chemical energy in gasoline and oxygen into thermal energy which is transformed into the mechanical energy that accelerates the vehicle (increasing its kinetic energy) by causing the pressure and performing the work on the pistons.

Answer:

The building is 746.666 meters high.

Explanation:

We know the total velocity of the rock ([tex]v[/tex]), in meters per second, and its horizontal speed ([tex]v_{x}[/tex]), in meters per second, at the moment right before its impact. It should be noted that the rock is experimenting a parabolic motion, which is the combination of a horizontal motion at constant speed and a free fall, which is an uniform accelerated motion due to gravity.

The final vertical speed of the rock ([tex]v_{y}[/tex]), in meters per second, is determined by the following Pythagoric formula:

[tex]v_{y} = \sqrt{v^{2}-v_{x}^{2}}[/tex] (1)

If we know that [tex]v = 123\,\frac{m}{s}[/tex] and [tex]v_{x} = 22\,\frac{m}{s}[/tex], then the final vertical speed is:

[tex]v_{y} = \sqrt{\left(123\,\frac{m}{s} \right)^{2}-\left(22\,\frac{m}{s} \right)^{2}}[/tex]

[tex]v_{y} \approx 121.017\,\frac{m}{s}[/tex]

Now we determine the height of the building ([tex]h[/tex]), in meters, by the use of the following kinematic expression:

[tex]h = \frac{v_{y}^{2}-v_{y,o}^{2}}{2\cdot g}[/tex] (2)

Where:

[tex]v_{y,o}[/tex] - Initial vertical speed of the rock, in meters per second.

[tex]g[/tex] - Gravitational acceleration, in meters per square second.

If we know that [tex]v_{y,o} = 0\,\frac{m}{s}[/tex], [tex]v_{y} \approx 121.017\,\frac{m}{s}[/tex] and [tex]g = 9.807\,\frac{m}{s^{2}}[/tex], then the height of the building is:

[tex]h = \frac{v_{y}^{2}-v_{y,o}^{2}}{2\cdot g}[/tex]

[tex]h = \frac{\left(121.017\,\frac{m}{s} \right)^{2}-\left(0\,\frac{m}{s} \right)^{2}}{2\cdot \left(9.807\,\frac{m}{s^{2}} \right)}[/tex]

[tex]h = 746.666\,m[/tex]

The building is 746.666 meters high.

Answer:

C. All energy in the universe is a result of mass being converted into energy.

Explanation:

Answer:

C

Explanation:

edgeee

Answer:

c) star explosions.....

Answer:

A

Explanation:

It’s a because a electrolyte reproduces

KE = 2000 J

Explanation:

KE = (1/2)mv^2

= (1/2)(0.100 kg)(200 m/s)^2

= 2000 J

Answer:

making it easier to perform a cost-benefit analysis of a decision.reducing the marginal benefits for a particular choice.

Explanation:

Answer: Making certain choices more beneficial than others.

Explanation: Just took test - Apx

Answer:

space is the answerrrerreer

Answer:

Resistance = 15 Ohms

Explanation:

Given the following data;

Emf voltage = 18 V

Internal resistance = 3 Ohms

Potential difference = 15V

To find the resistance of the wire;

First of all, we would determine the current flowing through the wire.

Mathematically, the terminal potential difference is given by the formula;

V = E - IR

Where;

V is the terminal potential difference.

E is the electromotive force (emf).

I is the current.

R is the internal resistance.

15 = 18 - I*3

15 = 18 - 3I

3I = 18 - 15

3I = 3

I = 1 Amperes

Next, we find the resistance of the wire;

Voltage = current * resistance

Substituting into the formula, we have;

15 = 1 * resistance

Resistance = 15/1

Resistance = 15 Ohms

Answer:

nionionohibuib

Explanation:

njkjnkj

Answer:

there is no picture :o?

Explanation:

:oo

A "screen" or even just a set of parallel bars are highly reflective to electromagnetic waves as long as the open spaces are small compared to the wavelengths.

"Grid" dishes work fine ... with less weight and less wind resistance ... for frequencies below about 3 GHz. (Wavelengths of at least 10 cm.)

(I even worked on a microwave system in South America where huge grid dishes were used on a 90-mile link.)

Answer:

Syringes are used to take blood for blood tests. The pressure of the liquid (blood) forces the liquid to move into the syringe when its plunger is withdrawn. When air is sucked out of a drinking straw, the air pressure inside if decreases and the atmospheric pressure outside forces the liquid to go inside the straw.

please mark as brainliest

Answer: The area of the edge of a knife’s blade is very small

Syringes are used to take blood for blood tests.

When air is sucked out of a drinking straw, the air pressure inside if decreases and the atmospheric pressure outside forces the liquid to go inside the straw.

Skis have a large area to reduce the pressure on the snow.

Answer:

q = 0.036 C

Explanation:

Given that,

Current passes through a defibrillator, I = 18 A

Time, t = 2 ms

We need to find the charge moved during this time. We know that,

Electric current = charge/time

[tex]q=It[/tex]

Put all the values,

[tex]q=18\times 0.002\\\\q=0.036\ C[/tex]

So, 0.036 C of charge moves during this time.

The purpose of working out is described as an example of motivation, as Randy works out every day because he wants to make the football team, so option A is correct.

In humans and other animals, motivation is what causes an activity to start, continue, or end at a specific time. The interpretation of motivational states as internal forces that increase an agent's propensity to engage in goal-directed behavior is common. Conflicting theories exist on the makeup of motivated moods. They are known as content theories, and they aim to explain the typical or consistent motives.

Behaviorist theories seek to elucidate behavior solely in terms of the relationship between the circumstance and outward, apparent conduct, avoiding any explicit mention of conscious mental states.

Therefore, the purpose of Randy's working out daily is described as an example of motivation, he is motivated to make a football team.

To know more about Motivation:

https://brainly.com/question/13529089

#SPJ6

Answer:

Definition of a scientific theory.

Answer:

theories on edge

Explanation:

Answer:

mass of block=2.7 gm

Explanation:

concept: Density=mass/volume

given:ρ=2700 kg/m^3 and v=250 cm^3 (in cm^3 not in m^3)

=> v= convert cm^3 to m^3

there fore= 1 cm^3=1 cm*1 cm*1 cm

i.e 1 cm^3=1/100*1/00*1/100 m^3 => 1 cm^3=1/1000000 m^3

ρ=m/v

=>mass=ρ*volume

=>mass=2700*1/10^-6

=>mass=2.7*10^-3 kg =>2.7 gm