An object that is falling through the air will feel"weightless because:

Answer:

The amount of heat energy that must be removed from the mixture to cool it to its freezing point, of -16°C is 45,360 J

Explanation:

The given parameters for the refrigeration unit and the ice cream are;

The power of the refrigeration unit = 120 J/s

The mass of the liquid ice cream, m = 0.6 kg

The initial temperature of the liquid ice cream, T₁ = 20°C

The freezing point temperature of the ice cream, T₂ = -16°C

The specific heat capacity of the ice cream, c = 2,100 J/kg⁻¹·°C⁻¹

The amount of heat energy that must be removed from the mixture to cool it to its freezing point, ΔQ, is given as follows;

ΔQ = m × c × ΔT

Where;

ΔT = T₁ - T₂

∴ ΔQ = m × c × (T₁ - T₂)

Therefore, by substituting the known values, we have;

ΔQ = 0.6 × 2,100 × (20 - (-16)) = 45,360

The amount of heat energy that must be removed from the mixture to cool it to its freezing point, of -16°C = ΔQ = 45,360 J.

Answer:

Hope I can help you.

Explanation:

Here u go here are some that you can choose from! :)

1) Air bags are activated by a chemical reaction inside the bag. A sensor turns on an electrical circuit, and then sodium azide is ignited. The reaction that occurs generates nitrogen gas, which fills the bag at an extremely rapid rate.

2) Baking soda and vinegar produce carbon dioxide gas when mixed. As this gas grows in volume, it puts pressure on whatever container it is in, and will erupt out of an opening in the container, creating a volcano effect. This chemical reaction is safe, making it a great science activity for kids.

3) Batteries have two terminals: the anode and the cathode. They're separated by an electrolyte, a chemical that allows the anode and cathode to transmit a charge. When something's connected to a battery, chemical reactions take place along the electrodes to produce electricity. Of course, you can't see the energy in the battery when the battery is just sitting around; it is when the electricity is produced that the energy is seen.

4) Explosives: when an explosive goes off, chemical energy that was stored in it is changed and transferred into sound energy, kinetic energy, and thermal energy. Just because chemical energy is being released, it doesn't mean an explosion will occur. But, when a solid material quickly changes into a hot, expanding gas, you may be looking at an explosion. Take TNT, for example. Two units of solid TNT can instantly change into 15 units of hot gas, creating a dark and sooty explosion.

5) Food: chemical energy in food is released when the food is digested and the molecules of food are broken down into smaller pieces. Our bodies digest food by mixing it with acids and enzymes in the stomach. This process turns carbohydrates into glucose. The stomach (and small intestine) then release that glucose into the bloodstream, serving as energy for our bodies.

6) Heating packs (used to warm up cold hands or soothe sore muscles) have chemicals inside them. A lot of them function by "cracking" (or bending) them. This is because they're filled with iron. Once you crack the heating pack, the iron is exposed to the air. As the iron reacts to the oxygen, it transforms into iron oxide, a chemical that can produce heat.

7) Wood, when dry, stores chemical energy. This chemical energy is released as the wood burns, and it is converted into heat, or thermal energy. This also produces light energy. As a result of burning, the wood turns into an entirely new substance - ashes.

Answer:

Answer: Movement in which all positions of both the waves rotate around the directions at right angles to the axis of the wave's movement.

Explanation: Hope this help

Answer:

Vbag = 4.22 [m/s]

Explanation:

In order to solve this problem we must use the principle of conservation of momentum. Which tells us that the momentum of a system is preserved before and after a collision.

Let's take both movements (bag and cart) as positive, since they both move in the same direction. Now everything that happens before the collision will be taken to the left of the equation and after the collision to the right of the equal sign.

[tex](m_{bag}*v_{bag})=(m_{bag}+m_{cart})*v_{final}[/tex]

where:

mbag = mass of the bag = 22 [kg]

vbag = velocity of the bag [m/s]

mcart = mass of the cart = 9 [kg]

vfinal = mass of both bodies moving together = 3 [m/s]

Now replacing:

[tex](22*v_{bag})=(22+9)*3\\22*v_{bag}=93\\v_{bag}=4.22[m/s][/tex]

Answer:

first one : 0.11

second one : 0.28

Explanation:

I took the test and got it right!!!!!

Answer: .164

Explanation:

1120x10^6 is the coefficient for ethyl alcohol b

(.00823)/(1120x10^-6)(44.8) which gives you your answer: 0.164 m^3

A vat of ethyl alcohol expands by 0.00823 m^3 when the temperature is raised by 44.8°C. The original volume of the alcohol is 0.164m³.

A measurement of three-dimensional space is volume. It is frequently expressed quantitatively using SI-derived units, as well as several imperial or US-standard units. Volume and the notion of length are connected.

The capacity of an object is measured by its volume. For instance, a cup's capacity is stated to be 100 ml if it can hold 100 ml of water in its brim. The quantity of space occupied by a three-dimensional object can also be used to describe volume.

A three-dimensional object's volume is the area it takes up, and it is expressed in cubic units. Cm3 and in3 are two examples of cubic units. The amount of matter in an item can be determined by its mass, on the other hand.

1120 x 10⁶ is the coefficient for ethyl alcohol b

= (.00823 ) / ( 1120 x 10⁻⁶) ( 44.8 )

= 0.164 m³

Thus, The original volume of the alcohol is 0.164m³.

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Explanation:

Weight on Earth = 784N.

Mass of Person = 784N / (9.81N/kg) = 79.9kg.

Weight on Moon = (79.9kg)(1.60N/kg) = 128N. (3s.f.)

Answer:

a

Explanation:

Answer:

Correct option is (a)

Explanation:

According to conservation of energy: Total energy of system remains conserved or we can say total energy = constant

(a) 400J of GPE is added and 250J of thermal energy is lost

⇒ Total energy = 400-250 J  = 150 J

hence, 150J energy is increased

(b) 100J of thermal energy is added and 450J of kinetic energy is lost

⇒ Total energy = 100-450 J  = -350 J

hence, 350J energy is decreased or lost by system

(c)200J of kinetic energy is added and 250J of thermal energy is lost

⇒ Total energy = 200-250 J  = -50 J

hence, 50J energy is decreased or lost by system

(d)300J of thermal energy is added and 450J of kinetic energy is lost

⇒ Total energy = 300-450 J  = -150 J

hence, 150J energy is decreased or lost by system

Therefore, correct option is (a)

Explanation:

According to conservation of energy: Total energy of system remains conserved or we can say total energy = constant

(a) 400J of GPE is added and 250J of thermal energy is lost

⇒ Total energy = 400-250 J  = 150 J

hence, 150J energy is increased

(b) 100J of thermal energy is added and 450J of kinetic energy is lost

⇒ Total energy = 100-450 J  = -350 J

hence, 350J energy is decreased or lost by system

(c)200J of kinetic energy is added and 250J of thermal energy is lost

⇒ Total energy = 200-250 J  = -50 J

hence, 50J energy is decreased or lost by system

(d)300J of thermal energy is added and 450J of kinetic energy is lost

⇒ Total energy = 300-450 J  = -150 J

hence, 150J energy is decreased or lost by system

Therefore, correct option is (a)

When two objects interact, they exert forces on each other. These forces act  in opposite directions.

According to Newton's third law of motion, every action has an equal and opposite reaction. As well as, the action and reaction are always acted in pairs.

When two things collide, they exert forces on one another. These forces have opposing effects.

When two objects interact, they exert forces on each other. These forces act  in opposite directions.

Hence,these forces act in opposite directions.

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Answer:

4202.4 J

Explanation:

The formula for calculating the heat absorbed by ice to melt into water is given by :

ΔH = Cp × m × Δ T   -------where ;

Cp =specific heat of ice = 2.06 J/g° C

m= mass of ice = 102 g

ΔT = 0°C--20°C = 20°C

Thermal energy absorbed by the ice will be;

ΔH = Cp × m × Δ T  

ΔH = 2.06 * 102 * 20

ΔH =4202.4 J

a. 13.23 N

b. 13.2

What you need to do is use this equation:

(m1 + m2) x g

hope it helps!

Answer:

Transverse

Explanation:

Electromagnetic waves don't depend on the medium they travel through like a mechanical wave does, so they aren't mechanical. They don't oscillate (move back in forth) in the direction they travel either, ruling out compressional and longitudinal waves.

That leaves tranverse waves, the ones we're most used to, since they look very "wavelike," with smooth peaks and valleys. Electromagnic waves behave like these, oscillating in a plane perpendicular to the direction they're traveling in.

Answer:

After one second both objects will have the same acceleration

Both objects will reach the ground at the same speed

Explanation:

Because a vaccum chamber is a free fall place

DIVIDE 1 BY 86400 TO CONVERT 1 SECOND INTO SOLAR DAY.

Answer:

The number of complete wavelengths in a given unit of time is called frequency (f). As a wavelength increases in size, its frequency and energy (E) decrease. From these equations you may realize that as the frequency increases, the wavelength gets shorter. As the frequency decreases, the wavelength gets longer.

Explanation:

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The number of complete wavelengths in a given  time is called frequency (f). As a wavelength increases in size, its frequency and energy (E) decrease.

The frequency referred to the  number of oscillation per unit time and it is used for defining the cyclic process like rotation, oscillation, wave etc.

The SI unit is denoted as Hertz and the symbol λ represents it where one hertz means the wave completed one cycle in one second.

The frequency explains the phenomenon of oscillatory and vibration like the mechanical vibration, sound signals, light, frequency waves etc. The  “period” represented as the time required by the wave for one oscillation, i.e., it is inversely proportional to the frequency.

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Explanation:

The options are; Ice Steam and Water.

The state of matter associated with the options are;

Ice - Solid

Steam - Gas

Water- Liquid

The particles are arranged in a regular pattern in ____________________

Among all the state of matter, the particles are closely packed and in an ordered manner is observed in the solid state - Ice

The particles are close together but not in a pattern in ____________________

In the liquid state of matter, the particles are not as tightly bounded as that of the solid. Hence they are able to still move around a bit.  - Water

The particles move quickly in all directions in ____________________

The particles of the gaseous state move in all directions colliding with each other and the walls of the container. - Steam

Answer:

Physiological – special ways that animals' bodies work to help them survive in whatever condition they're in, such as camels in the desert conserving water and being able to go days without drinking.

Explanation:

The word "gravity" belongs between "of" and "on".

Image result for During a spring tide, the high tides are very high and the low tides are very low. Why does this occur?

In both cases, the gravitational pull of the sun is 'added' to the gravitational pull of the moon on Earth, causing the oceans to bulge a bit more than usual. This means that high tides are higher and low tides are lower than average. These are called 'spring tides. '

brainliest please?

Answer:

In both cases, the gravitational pull of the sun is 'added' to the gravitational pull of the moon on Earth, causing the oceans to bulge a bit more than usual. This means that high tides are higher and low tides are lower than average. These are called 'spring tides. '

Answer:

Yes, an object that was set in motion in the past by some force, but that is no longer being acted on by a net force, is moving but with zero acceleration, i.e. it is moving at constant velocity. For example, a puck sliding along a horizontal plane of ice after being hit with a hockey stick.

Answer:

12mA

Explanation:

Answer:

D

Explanation: need good posture other wise will injury yourself during activity

Answer:

it binds the negatively charged electrons to the positively charged atomic nucleus.

Explanation:

its called Electromagnetic Force

40,000 kg

density=mass/volume

then mass=density×volume

= 8000× 5

=40,000 kg

Answer

liver

Explanation:

Once sufficient oxygen is restored, the lactic acid produced via anaerobic glycolysis can be utilized for energy or reconverted into glucose by the liver and other tissues (a process known as oxidation).

Answer:

Using the orbital velocity as deg/time  or the angular speed:

1 rev / sec = 2 * pi rad / sec   since there are 2 pi rad in a revolution

2 rad/sec = 1 / pi rev/sec  = f   from above

P = 1 / f = pi sec/rev = 3.14 sec/rev

Answer:

Sorry this isn’t going to be any help. You don’t have any statement that I’m able to see.

Explanation: