Which circuit shows three resistors connected in series?​

Given that,

Mass, m = 250 g

Volume of the container, V = 50 cm³

To find,

The density of the oil.

Solution,

Density = mass/ volume

The computation for density is as follows :

[tex]\rho =\dfrac{m}{V}\\\\\rho =\dfrac{250\ g}{50\ cm^3}\\\\=5\ g/cm^3[/tex]

So, the density of the oil is [tex]5\ g/cm^3[/tex].

Answer:

⭐. cryptogams ( non-flowering & non-seed bearing)

⭐. phanerogams ( flowering & seed bearing)

Answer:

c

Explanation:

Answer:

C.

Explanation:

When there is heat the water turns into vapour if not covered but will turn back to water if covered (condensation)

Answer:

A blackbody, or Planckian radiator, is a cavity within a heated material from which heat cannot escape. No matter what the material, the walls of the cavity exhibit a characteristic spectral emission, which is a function of its temperature.

Example:

Emission from a blackbody is temperature dependent and at high temperature, a blackbody will emit a spectrum of photon energies that span the visible range, and therefore it will appear white. The Sun is an example of a high-temperature blackbody.

Answer:

b  

Explanation:

because if you freeze somthing you do not gain heat you loss heat.

Answer:

0

Explanation:

the block is being pulled at a constant velocity meaning it has no acceleration. the rule is fnet=mass x acceleration so if theres no acceleration there is no force net!

A block of mass 2 kg is pulled across a surface with a force of 15 N then the net force acting on the block is 0.

A force is an effect that can alter an object's motion according to physics. A force might cause an object has mass to accelerate when it changes its velocity, for, us when it moves away from rest. An obvious way to describe force is in terms of push or pull. A force is a vector quantity since it has equal magnitude and direction. It is calculated using the newton SI unit (N). Force is denoted by the letter F.

The net force exerted by an object was equal to the speed at which its velocity varies over time, according to Newton's second law in its original formulation.

The block has no acceleration because it is being pushed at a constant speed. If there is no acceleration, there is no force net because the formula is net force =mass × acceleration.

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Answer:

Heat

Explanation: The state in which no thermal energy transfer occurs because both substances are at the same temperature.

Answer:

A: Heat

I hope this helps

Answer:

Ozone is a compound.

Explanation:

Elements are simple atoms that can merge or combine to produce a bigger molecule called a compound. They can not be splitted into smaller atoms. Examples are: hydrogen, carbon, etc.

A compound is formed as a result of the combination of two or more elements. They can be splitted into elements. Examples are: ammonium, water, carbon dioxide etc.

Ozone ([tex]O_{3}[/tex]) is a less stable allotrope of oxygen which is made up of three atoms of oxygen. Therefore, it is a compound.

Answer:

physics and math tutor

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Explanation:

hii! for PTM(physics and math tutor) you simply type in the search bar for example in. physics Units and measurements past papers.Then the first option would be PTM(physics and math tutor) and you click on it and it would give you on the left side Revision Notes, flashcards and practice questions. This site has helped me so much and I hope this helps you too (by the way PTM has for all 3 sciences and math too) just simply type the lesson name along with past paper and click on the first link and you'll get yourself your answers!!!! hopefully this helps!:))

Answer:

(a). 640.000 --- 6 significant figures.

(b). 2.0 --- 2 significant figures.

(c). 0.520200 --- 6 significant figures.

(d). 10.05 --- 4 significant figures.

(e). 10,000.0 --- 6 significant figures.

(f). 30.7 --- 3 significant figures.

(g). 0.00000065 --- 8 significant figures.

Answer:

Radio Waves

Explanation:

Answer:

A sled and its rider are moving at a speed of along a horizontal stretch of snow, as Figure 4.24a illustrates. The snow exerts a kinetic frictional force on the runners of the sled, so the sled slows down and eventually comes to a stop. The coefficient of kinetic friction is 0.050. What is the displacement x of the sled?

Answer:

try finding on a website

Explanation:

Answer:

there are conversion scales used for doing that

to convert Celsius to Fahrenheit we use the formula,

T(°F) = T(°C) × 9/5 + 32

and to convert Fahrenheit to Celsius we use,

T(°F) = T(°C) × 5/9 + 32

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Explanation:

Acceleration is the answer.............

C. Restore muscles to their resting length

Hope this helps:)

Answer:

c isthe answer if not see my profile m e. e. t me I will explain u

Answer:

26m

Explanation:

Given parameters:

Acceleration = 7.7m/s²

Initial velocity = 0m/s

Final velocity  = 20m/s

Unknown:

Distance traveled  = ?

Solution:

To solve this problem, we use the expression below:

      v²   = u²   + 2aS

v is the final velocity

u is the initial velocity

a is the acceleration

S is the distance

            20²  = 0²   +  (2 x 7.7 x S)

            400  = 15.4S

              S = 26m

Answer:

Answer:

Answer:

pay back : the answer is 2 because 2 + 4 = 2

Step-by-step explanation:

2 + 4 = 2 your welcome

Explanation:

Explanation:

Answer:

At the midpoint of the line joining the two equal charges

Explanation:

The midpoint of the line joining the two equal charges has equal distance from each charge. Since the charges are at x = a and x = -a, at the midpoint of the line joining the two equal charges, the magnitude of the electric field experienced as a result of each charge is the same. But these two fields are in opposite direction, hence the net resulting electric field would be equal to zero.

Answer:

i. The velocity ratio of the plane is 4.

ii. The mechanical advantage of the plane is 3.

Explanation:

i. The velocity ratio (VR) of an inclined plane is ratio of its length to the height. It is given as;

VR = [tex]\frac{length of the plane}{height}[/tex] = [tex]\frac{l}{h}[/tex]

Given: l = 12 m, L = 600 N, E = 200 N, h = 3 m.

So that,

VR = [tex]\frac{12}{3}[/tex]

     = 4

The velocity ratio of the plane is 4.

ii. Mechanical advantage (MA) expresses the relationship between the load overcome to effort applied.

MA = [tex]\frac{Load}{Effort}[/tex] = [tex]\frac{L}{E}[/tex]

      = [tex]\frac{600}{200}[/tex]

      = 3

The mechanical advantage of the plane is 3.

Therefore, the velocity ratio of the inclined plane is 4, and its mechanical advantage is 3.

Answer:

static friction is the friction that resists the motion between two objects that are not moving

Answer:

you start sweating and it would get hot

Explanation:

power = 1/2 mass × velocity^2 >>1

velocity = distance / time = 76 /18 = 4.2m

then power = 1/2 × 276 × (4.2)^2 = 138 × 17.64 = 2,434.3 jules.

Answer:

5.6x10^4

Explanation:

use the equation V=kq/d

k is the constant 8.99x10^9

V=(8.99x10^9)q/d

q is the charge, 7.5 micro coulombs, but to get coulombs, multiply by 10^-6

V=(8.99x10^9)(7.5x10^-6)/d

And from the problem, we know that the distance is 1.2 meters

V=(8.99x10^9)(7.5x10^-6)/1.2

This simplifies to 5.6x10^4

The electric potential is 5.6 x 10⁴ v.

To find the electric potential the distance = 1.2 m

Charge q = 7.5 UC

               The amount of work needed to move a unit charge from the known point to some unknown point against the electric field  is said to be electric potential.

Formula of an electric potential is

                                     V = k ( q/r)  volt

                   V - electric potential

                    k - Coulomb constant (8.99x10^9)  

                    q -  charge

                     r- distance of separation

  V = (8.99x10⁹) (q/d)

  q = 7.5 UC ( micro coulomb) 10⁻⁶ C

   V=(8.99x10⁹)(7.5x10⁻⁶)/d

Substituting the values,

    V=(8.99x10⁹)(7.5x10⁻⁶)/1.2

    V = 5.6x10⁴ v

Thus, option A is correct.

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Answer:

radio waves electricity

Answer:

v = 0.713[m/s]

Explanation:

Kinetic energy is defined as the product of mass by the squared velocity of a body. In this way with the following expression we can have the kinetic energy as a function of velocity.

[tex]E_{kin}=0.5*m*v^{2}[/tex]

where:

m = mass = 85 [kg]

v = velocity [m/s]

Ekin = kinetic energy = 2.16*10 [J]

[tex]2.16*10 = 0.5*85*v^{2}\\v =\sqrt{0.508} \\v= 0.713[m/s][/tex]

Answer:

B. It can be answered using measurements.

Explanation:

Scientific inquiry can be defined as the various ways, techniques and approach used by scientists to study the world and provide a detailed description (information) based on the empirical evidence derived from the investigation.

Measurements can be defined as a technique which typically involves the process of identifying and determining the dimensions, quality and quantity of a physical object.

Hence, the statement which best describes a characteristic of a question that can be answered through scientific inquiry is that, it can be answered using measurements. Using scientific inquiry to answer questions entails using measurements to propose specific and evidential explanations, as well as back up theories associated with the question.

Answer:  TRUE

Explanation:

(Example): If there was lightening outside, the lightening (light) could travel through a tree (that you cannot see through).

The statement Light can travel through materials that you cannot see through, like wood or aluminum foil, is True.

Electromagnetic radiation that the human eye can detect as light. The wavelengths of electromagnetic radiation cover a very broad spectrum. Information about space and time is transmitted by light. This characteristic serves as the foundation for the study of optics, optical communications, and a wide range of other related, both established and developing technologies.

Lasers, holography, and fiber-optic communication systems are examples of technologies that use light manipulation. The electromagnetic spectrum, which includes all forms of light, propagates in a vacuum at the same speeds, c. only a small portion of which is visible to humans. And it is unquestionably possible for non-visible light to pass through wood, including radio waves, x-rays, and gamma-energy photons.

Therefore, the statement Light can travel through materials that you cannot see through, like wood or aluminum foil, is True.

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