.An iron nail sinks in water but a ship made of the same materials floats on water. why?​

Answer:

deposition, sublimation

Explanation:

The changes of state occur between solids and gases during deposition and sublimation. The second and fifth option are correct.

The conversion of solid to gas and gas to solid directly, as in case of solid ice made of carbon di oxide.

The change of state means changing the phase of the matter with the change in temperature and pressure of the surrounding.

The vaporization change liquid to gas or solid to liquid and vice versa. Freezing is converting liquid to solid. Melting is converting from solid to liquid.

The rest phenomenon are deposition and sublimation in which phase change between solid and gas.

Thus,  second and fifth option are correct.

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Knowing the force and the duration, we can simply multiply them to get the "impulse".  This is really convenient for this question, because the impulse is also the change in momentum.  So let's do it:

Change in momentum =  (force) x (duration)

Change in momentum = (1 x 10² Newtons) x (1 x 10⁴ seconds)

Change in momentum = (100 N) x (10,000 seconds)

Change in momentum = 1,000,000 Newton-seconds

Change in momentum = 1,000,000 kg-m/s .

That sunawfulada momentum !  It's the same change in momentum as if you stopped a 4,000-kg truck that was going 550 mph, in 1 second !

There's gotta be something wrong here.

Notice the duration of the impact in the question: 1 x 10⁴ seconds.

That's 2 hours and 47 minutes !  Collisions don't normally take that long.

Call me batty, but I've got a hunch that the duration actually is supposed to be 1.0 x 10 to the NEGATIVE fourth power. Then, the change in momentum is

(100 N) x (0.0001 s)  =  0.01 kg-m/s

That's still a slightly uncomfortable result, but it's definitely more realistic ... it could be the act of batting a fly or a mosquito out of the air.

I like that a lot better than a collision that takes almost 3 hours.

Answer:

Gravity always pulls the ball toward the center of earth (the ground).

Explanation:

Answer:

C-objects with balanced forces remain un changed

Explanation:

because the forces that act on the body cancel each other and the net force=0

Answer:

They prolly dead lol.

Explanation:

XD THEY DEAD!!

Answer:

I think that Mars would be the easiest planet for humans to colonize because they have already begun working on colonizing Mars and have made a ton of progress.

Answer:

The force of gravity, g = 9.8 m/s2

Gravity accelerates you at 9.8 meters per second per second. After one second, you're falling 9.8 m/s. After two seconds, you're falling 19.6 m/s, and so on.

Time to splat: sqrt ( 2 * height / 9.8 )

It's the square root because you fall faster the longer you fall.

The more interesting question is why it's times two: If you accelerate for 1 second, your average speed over that time is increased by only 9.8 / 2 m/s.

Velocity at splat time: sqrt( 2 * g * height )

This is why falling from a higher height hurts more.

Energy at splat time: 1/2 * mass * velocity2 = mass * g * height

Explanation:

The time taken by the rock to fall will be 3 seconds.

Velocity is defined as the ratio of the distance moved by the object at a particular time. The velocity is a vector quantity so it needs both the magnitude and the direction.

The time taken for the freely falling body is calculated by the equations of motion. That is v² = u² + 2gs. By using the equation we can calculate the velocity and the time period.

The force of gravity, g = 9.8 m/s²

Gravity accelerates you at 9.8 meters per second per second. After one second, you're falling 9.8 m/s. After two seconds, you're falling 19.6 m/s, and so on.

Time to splat  = √( 2 x height) / 9.8

Time to splat  =  √( 2 x 50 ) / 9.8

Time to splat  =  3 seconds

Therefore, the time taken for the rock to fall will be 3 seconds.

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the height of the corn maybe

sorry im late can dissolve is the answer <3

Answer:

dissolve

Explanation:

Answer:

THE WALL MOVES AWAY FROM THE BALL

Explanation:

NEWTON'S THIRD LAW STATES THAT THERE IS A OPPOSITE REACTION

Answer:

the answer might be A and D if not sorry

Explanation:

Answer:

Laws are statements about something that's been observed and stated while a theory is an explanation of what's been observed. This connection between them forms a main idea that many people regulate as "what's normal."

Explanation:

Answer:

A hypothesis is a limited explanation of a phenomenon; a scientific theory is an in-depth explanation of the observed phenomenon. A law is a statement about an observed phenomenon or a unifying concept, according to Kennesaw State University. ... However, Newton's law doesn't explain what gravity is, or how it works.

for e.g:

The particle theory and Darwin's theory of human origin.

Answer:

a) El trabajo realizado por esta fuerza mientras el bloque se mueve desde la posición x = + 10 m hasta la posición x = + 20 m es 900 joules.

b) La rapidez del bloque en la posición x = + 20 metros es aproximadamente 5.701 metros por segundo.

Explanation:

a) El trabajo expermentado por el bloque ([tex]W[/tex]), medido en joules, es definida por la siguiente ecuación integral:

[tex]W = \int\limits^{x_{max}}_ {x_{min}} F(x) \, dx[/tex] (1)

Donde:

[tex]x_{min}[/tex], [tex]x_{max}[/tex] - Posiciones mínima y máxima del bloque, medidos en metros.

[tex]F(x)[/tex] - Fuerza horizontal aplicada al bloque, medida en newtons.

Si conocemos que [tex]F(x) = 6\cdot x[/tex], [tex]x_{min} = 10\,m[/tex] y [tex]x_{max} = 20\,m[/tex], entonces el trabajo realizado por esta fuerza es:

[tex]W = \int\limits^{20\,m}_{10\,m} {6\cdot x} \, dx[/tex] (2)

[tex]W = 6\int\limits^{20\,m}_{10\,m} x\, dx[/tex]

[tex]W = 3\cdot x^{2}\left|\limits_{10\,m}^{20\,m}[/tex]

[tex]W = 3\cdot [(20\,m)^{2}-(10\,m)^{2}][/tex]

[tex]W = 900\,J[/tex]

El trabajo realizado por esta fuerza mientras el bloque se mueve desde la posición x = + 10 m hasta la posición x = + 20 m es 900 joules.

b) La rapidez final del bloque se determina mediante de Teorema del Trabajo y la Energía, es decir:

[tex]W = K_{f}-K_{o}[/tex] (3)

Donde son [tex]K_{o}[/tex], [tex]K_{f}[/tex] las energías cinéticas traslacionales inicial y final, medidos en joules.

Al aplicar la definición de energía cinética traslacional, expandimos y simplificamos la ecuación como sigue:

[tex]W = \frac{1}{2}\cdot m \cdot (v_{f}^{2}-v_{o}^{2})[/tex] (4)

Donde:

[tex]m[/tex] - Masa del bloque, medido en kilogramos.

[tex]v_{o}[/tex], [tex]v_{f}[/tex] - Rapideces inicial y final del bloque, medidos en metros por segundo.

[tex]\frac{2\cdot W}{m} = v_{f}^{2}-v_{o}^{2}[/tex]

[tex]v_{f} = \sqrt{\frac{2\cdot W}{m}+v_{o}^{2}}[/tex]

Si conocemos que [tex]W = 900\,J[/tex], [tex]m = 20\,kg[/tex] y [tex]v_{o} = \sqrt{10}\,\frac{m}{s}[/tex], entonces la rapidez final del bloque es:

[tex]v_{f} = \sqrt{\frac{900\,J}{2\cdot (20\,kg)}+10\,\frac{m^{2}}{s^{2}} }[/tex]

[tex]v_{f} \approx 5.701\,\frac{m}{s}[/tex]

La rapidez del bloque en la posición x = + 20 metros es aproximadamente 5.701 metros por segundo.

Answer:

hiiiiiiiiiiiiiiiiiiiiiiiiii

Answer:

Hiii , how are you holding up with corona?

Explanation:

Answer:

The new volume is the same as the initial volume, i.e. 20 mL.

Explanation:

To find the new volume we can use the Ideal gas law:

[tex] PV = nRT [/tex]

Where:

P: is the pressure

V: is the volume

R: is the gas constant

n: is the number of moles

T: is the temperature

Initially, we have:

[tex] \frac{P_{i}V_{i}}{T_{i}} = nR [/tex]    (1)

In the final state:  

[tex] \frac{P_{f}V_{f}}{T_{f}} = nR [/tex]    (2)

By equating equation (1) and (2) we have:          

[tex] \frac{P_{i}V_{i}}{T_{i}} = \frac{P_{f}V_{f}}{T_{f}} [/tex]  

[tex] \frac{P_{i}V_{i}}{T_{i}} = \frac{2P_{i}V_{f}}{2T_{i}} [/tex]  

[tex]V_{f} = \frac{2T_{i}*P_{i}*V_{i}}{T_{i}*2P_{i}}[/tex]

[tex] V_{f} = V_{i} [/tex]

[tex] V_{f} = 20.0 mL [/tex]

Therefore, the new volume is the same as the initial volume, i.e. 20 mL.

I hope it helps you!

Answer:

Due to the process of weathering and erosion.

Explanation:

Density is the mass per unit volume of any object. It is calculated by dividing the mass of an object by its volume. This is:

ρ = m/V

ρ = 4.05 g  / 12 mL

ρ = 0.3375 g/mL

OPTION A

Answer:

part a: 4.25s

part b: 180.625m

Explanation:

part a:

what we know: vi=42.5m/s

                          t=?

                          vf=0

                          g= -10m/s^2

----------------------------------------------------------

equation: vf-vi/g=t

plug in: -42.5m/s/ - 10m/s^2 = 4.25s

-----------------------------------------------------------

part b: 42.5m/s x(times) 4.25s = 180.625m

Answer:

so first is the clouds is presipitision then its  the ocean one and then dirt and then the mud then the gray part

Explanation:

Answer:

Vy = 4.65 m/s

Explanation:

Since, the airplane is descending at a rate of 480 km/h at an angle of 2° from horizontal. Therefore, its vertical component of velocity shall be given as follows:

Vy = V Sin θ

where,

Vy = Vertical Component of Velocity = ?

V = Velocity of Plane = (480 km/h)(1000 m/1 km)(1 h/3600 s) = 133.33 m/s

θ = Angle = 2°

Therefore,

Vy = (133.33 m/s)(Sin 2°)

Vy = 4.65 m/s

Answer:

102564.103 C

Explanation:

From the question given above, the following data were obtained:

Energy (E) = 4000 J

Potential difference (V) = 0.078 V

Charge (Q) =?

Thus, we can obtain the charge as illustrated below:

E = ½QV

4000 = ½ × Q × 0.078

4000 = Q × 0.039

Divide both side by 4000

Q = 4000 / 0.039

Q = 102564.103 C

Thus, the charge is 102564.103 C.

Answer:  

t=2.59s

Explanation:

v=23.5m/s u=15.2m/s a=3.2m/s^2 t=?

using equation v=u+at t=(v-u)/a t= (23.5-15.2)/3.2=8.3/3.2=2.59s

Answer:

The sweet food changed because the molecules were able to move fast enough to overcome the attraction between them with its molecules now moving away from each other.

Explanation:

We are told that the sweet food has a strong attraction between its molecules, and the sour food has a weak attraction between its molecules.

This means that the molecules in the sweet food would be moving at a faster rate than in the sour food because of the strong forces of attraction. Therefore, the molecules in the sweet food would be moving far away from each other hence the change of phase.

The sweet food changed since the molecules were capable to move fast i.e. sufficient to overcome the attraction between them with its molecules.

information regarding molecules:

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Answer:A, you would weigh the same on both planets because their masses and the distance to their centers of gravity are the same

Explanation:

thats cool for brandon

Answer:

thats 350 miles an hour, 5.83 miles a minute, .0972 miles a second

Explanation:

Explanation:

Given parameters:

Energy input  = 130000J

Energy output = 53000J

Unknown:

Efficiency of the conversion = ?

Solution:

Efficiency is the percentage of work output to work input;

  Mathematically;

 Efficiency  = Energy output/ Energy input x 100

 Efficiency  = 53000/130000 x 100 = 40.8%