What’s is the velocity

Answer:

B

Explanation:

When The conduct of particles is connected to the chemical properties of the materials. The two options are correct B and D.

A property of a substance connecting to its chemical reactivity (as the incendiary effects of nitroglycerin).

Chemical stability and oxidation circumstances, different chemical properties include: Essentially, the chemical property is a differentia that may only be commemorated as an influence of a chemical reaction.

Therefore, The two correct options are B. Efficiently forming bonds with atoms of different elements and D. Converging with oxygen atoms to form a unique substance.

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Answer:

I think true..... :))))))))))

Answer:

Materials can be classified based on the amount of light they transmit. Materials, which allow complete transmission of light, are called transparent. Any object can be seen through a transparent material. One example of transparent material is pure glass.

Explanation:

Does this help ?

Answer:

light, materials, and shadows

Explanation:

hope this helps have a good rest of your day :) sorry if incorrect

Answer:

5714.29

Explanation:

The given expression is:

          200 = m(3.5% )

To solve this problem, we use the concept of multiplicative inverse;

   The multiplicative inverse involves using the reciprocal of 3.5% to multiply both side of the expression;

         200  = m x [tex]\frac{3.5}{100}[/tex]  

           m  = [tex]\frac{100}{3.5}[/tex]  x 200  = 5714.29

Answer:

Increase in strength of hurricanes

Explanation:

A possible result of rising ocean temperatures caused by global warming is increase in strength of hurricanes.

Global warming is an environmental concern characterized by the gradual increase in the Earth's atmospheric temperature.

Global warming can lead to the rise of temperature in air and oceans as well.

One consequence of an increase in ocean temperature is that the strength of hurricanes, which is strong wind accompanied by rain, will be increased.

Therefore, a possible result of rising ocean temperatures caused by global warming is increase in strength of hurricanes.

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Answer:

Miter joint

Explanation:

Made by fastening together usually perpendicular parts with the ends cut at an angle

Answer:

because liquid and solid states of water possesses intermolecular force of attraction which held the molecules of water in fixed

Answer:

False. Astrology is not a science.

Explanation:

Astrology is a collective term for ideas about the supposed connection between the fate of people and events on Earth and the position of the celestial bodies. It mainly concerns the places in the sky of the sun, moon and planets, which were referred to as stars in ancient times, usually against the background of the fixed stars in the Zodiac. Although astrology cannot be confirmed despite research, and scientists have long rejected the principles of astrology as pseudoscience, many people continue to practice and / or believe in it.

Answer:

False

Explanation: i got it right in edge

Answer:

in the ball

Explanation:

potential energy is where an object has energy, always, but it isn't always moving, and when you drop the ball, it has kinetic energy.

Answer:

Solution:

i) Heat supplied by heater = Heat gained by water = m * c*theta = 0.12Kg * 4200 * 10 = 5040Joules in 2 minutes.

ii) Power = Energy/time = 5040J/(2 * 60seconds) = 5040J/120seconds = 42Watts.

(iii) Heat supplied to the 70g of water = m * c * theta = 0.07Kg * 4200 * 9K = 2646J

(iv) Heat supplied by heater = Heat gained by 70g of water + Heat supplied to the metal vessel.

But,from our calculations above,

Heat supplied by heater = 5040J ......and

Heat supplied to the 70g of water = 2646J

.: substituting the values,we have that :

5040J = 2646J + Heat supplied to the metal vessel.

5040J - 2646J = Heat supplied to the metal vessel.

.: Heat supplied to the metal vessel = 2394J.

(v) Heat gained by metal vessel = Heat capacity of the vessel * theta.

2394J = Heat capacity of the vessel * 9K

.: Heat capacity of the vessel = 2394/9 = 266(Joule per Kelvin)

(vi) Using the formula:

Heat Capacity = mass * specific heat capacity

.: Specific heat capacity = Heat Capacity/mass = 266/0.55 = 484(Joules per Kilogram per Kelvin)

Explanation:

Answer:

Momentum of car = 1200 kg * 10 m/s = 12000 kgm/s Momentum = Force * time 12000 kgm/s = Force * 20s Force = 600 N

Explanation:

Answer:

1,200 W

Explanation:

18,000 J / 15s = 1,200 W

Answer:

It's Laws of Motion

Explanation:

Answer: No, because the atomic number shown in the symbol (Z = 15) is not the atomic number of oxygen (Z = 8)

Explanation:

When we have an atom, the number in the top left is the mass number A, is equal to the sum between the number of neutrons and protons in the atom.

In this case, between protons and neutrons, we have 32.

The number at the bottom left is the atomic number Z, which is equal to the number of protons in the atom.

Particularly, this number is different for every element. For example, for the oxygen we would have Z = 8, this means that the oxygen has 8 protons.

In the image, we can see Z = 15, then the atom has 15 protons, this means that it can not be oxygen (Z = 15 is for phosphorus, then this atom would be phosphorrs). Then the symbol can not be used, because that is not oxygen.

Answer:

Nuclear energy

Explanation:

The nucleus holds the energy together

Answer:

A. identify plants and make assumptions on past climate conditions.

Explanation:

Answer was right on my Edge quiz!

Pollen grains help scientists identify plants and make assumptions on past climate conditions.

Proxy climate is climate inferred from past records i.e. not current.

Proxy climate makes use of proxy climate data also called proxies. These proxies help in inferring about the past climate.

Examples of proxies are;

Therefore, pollen grains help scientists identify plants and make assumptions on past climate condition.

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Answer:

[tex]a=16\ m/s^2[/tex]

Explanation:

Motion With Constant Acceleration

It's a type of motion in which the velocity of an object changes uniformly in time.

The formula to calculate the change of velocities is:

[tex]v_f=v_o+at[/tex]

Where:

a   = acceleration

vo = initial speed

vf  = final speed

t    = time

The roller coaster moves from vo=6 m/s to vf=70 m/s in t=4 seconds. To calculate the acceleration, solve for a:

[tex]\displaystyle a=\frac{v_f-v_o}{t}[/tex]

[tex]\displaystyle a=\frac{70-6}{4}=\frac{64}{4}[/tex]

[tex]\boxed{a=16\ m/s^2}[/tex]

Answer:

Qúéßtîóñ : A quantity of pepper soup of mass 800g poured into a plastic container with a tight fitting lid has a temperature of 30oC. The container is then placed in a microwave oven, rated 1200 W and operated for3 minutes.

(i) Calculate the final temperature attained by the soup. (Assuming no heat losses)

Àñßwër : Pt = mc

1200 x 3 x 60 = x 4000 x

= 67.5o

Final temp = 67 . 5o + 30o

= 97.5oC

(ii) Explain why containers with tight-fitting lids are not suitable for use in microwave cooking.

Àñßwër : The molecules of the steam from the content are confined within the container. As the temperature increases the rate of collision of the molecules with walls of the container increases, thus the pressure inside the container increases. If it is tightly fitted, the pressure can make the container burst thus releasing its hot content.

(iii) When the soup is brought out and allowed to cool, a dent was observed on the container. Explain.[ Take specific heat capacity of the soup = 4000 Jkg-1 K-1 ]

Àñßwër: The container will dent because the condensation of the steam in the container will lead to a decrease in pressure in the container making the atmospheric pressure greater than the pressure in the container.

Explanation:

Answer:

The bending occurs because light travels more slowly in a denser medium.

Answer:

first one

Explanation:

376,425 is the biggest number in general

Answer:

the first line is true whuch is 376425>367419

Explanation:

Because acceleration is velocity in m/s divided by time in s, the SI units for acceleration are m/s2, meters per second squared or meters per second per second, which literally means by how many meters per second the velocity changes every second. ... The quicker you turn, the greater the acceleration.

Answer:

0.17 m

Explanation:

The formula to apply in this question is that of speed of light.

The speed of the microwaves :

v = f * λ ------where f is frequency of the microwave, λ is the wavelength  and v is the speed of the wave

3.0 x 10⁸ = 1.8 x 10⁹ *λ

3.0 x 10⁸ / 1.8 x 10⁹ = λ

λ  = 0.16666666666

λ = 0.17 m { two significant figures}

Answer:

The Pendulum falls but the longer the period or the back and forth swing the greater amplitude the oscillation depends on the amplitude

Explanation:

Answer:

4.5kgm/s

Explanation:

Change in momentum is expressed as

Change in momentum = m(v-u)

M is the mass

V is the final velocity

u is the initial velocity

Given

m=0.45kg

v = 30m/s

u = 20m/s

Substitute

Change in momentum = 0.45(30-20)

Change in momentum = 0.45×10

Change in momentum = 4.5kgm/s

Answer:

option c

Explanation:

6420/55

116.7

approximately 117

Answer:

203.1J

Explanation:

Given parameters:

Mass  = 65kg

Speed  = 2.5m/s

Unknown:

Kinetic energy of jogger  = ?

Solution:

To solve this problem, we use the kinetic energy equation:

    K.E  = [tex]\frac{1}{2}[/tex] m v²  

m is the mass

v is the velocity

 Now insert  the parameters and solve;

  K.E  =  [tex]\frac{1}{2}[/tex] x 65 x 2.5²   = 203.1J

Explanation:

Catastrophism is a geological concept or ideology that was formerly in place. It suggests that the earth crust has evolved through only drastic and violent geological events.

Uniformitarianism suggests that the earth carefully evolved over a period of time and that the processes that are occurring today have occurred in times past.