a classmate states that continental drift could not be possible because it would take far too much force to move tectonic plates. describe the hypothesis scientists use to explain the movement of tectonic plates. which hypothesis do money scientist things may explain the great force needed to move plates

Answers

Answer 1

Answer: Seafloor Spreading is how the plates move. It is a process in which new oceanic crust (ocean floor) is created from the hot magma that comes to the surface. The magma is cooled by the water. The new floor pushes outward and moves the old floor. This is the force that causes the plates to shift. Harry Hess came up with this theory. John Tuzo Wilson combined Alfred Wegener's theory of continental drift and Harry Hess's theory of seafloor spreading to create a reasonable explanation for how the plates could have moved then created his own theory of plate tectonics.

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Unlike metals, many nonmetals are.......a. good conductors of heat and electricity.

b. malleable and ductile.

c. gases at room temperature.

d. shiny.

Answers

Unlike metals, many non-metals are malleable and ductile. Thus, the correct option is B.

What are non-metals?

Non-metals are those metals which lack all the metallic attributes which are found in metallic elements. The non-metals are good insulators of heat and electricity. They are mostly gases and sometimes also liquid. Some of the elements then are even solid at room temperature include Carbon, sulphur and phosphorus.

A malleable material is the material in which a thin sheet can be easily formed through hammering. Gold is the most malleable metal found in nature. In contrast, ductility can be defined as the ability of a solid material to deform under the tensile stress.

Therefore, the correct option is B.

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The correct is b: malleable and ductile.

Which of the following is an example of a compound C2, O2, He2, CO2?

Answers

Carbon dioxide is an example of a compound (CO2)

CO2 and He2 is an example of a compound. Anything that has only one type of atom is a molecule, and anything having more than one type of atom is a compound.

Which form of energy is observed when an athlete runs

Answers

The answer is kinetic energy because kinetics refers to the movement of the particular motion.

I am supporting the answer that Benny had just given you.

An airplane is moving at 350 km/hr. If a bomb isdropped from the airplane at 1.5 km, (a) with what
velocity does the bomb strike the earth? (b) How
long does it take the bomb to fall? (c) What is the
bomb's range?

Answers

Answers:

a) -171.402 m/s

b) 17.49 s

c) 1700.99 m

Explanation:

We can solve this problem with the following equations:

$y=y_(o)+V_(oy)t-(1)/(2)gt^(2)$ (1)

$x=V_(ox)t$ (2)

$V_(f)=V_(oy)-gt$ (3)

Where:

$y=0 m$ is the bomb's final jeight

$y_(o)=1.5 km (1000 m)/(1 km)=1500 m$ is the bomb'e initial height

$V_(oy)=0 m/s$ is the bomb's initial vertical velocity, since the airplane was moving horizontally

$t$ is the time

$g=9.8 m/s^(2)$ is the acceleration due gravity

$x$ is the bomb's range

$V_(ox)=350 (km)/(h) (1000 m)/(1 km) (1 h)/(3600 s)=97.22 m/s$ is the bomb's initial horizontal velocity

$V_(f)$ is the bomb's fina velocity

Knowing this, let's begin with the answers:

b) Time

With the conditions given above, equation (1) is now written as:

$y_(o)=(1)/(2)gt^(2)$ (4)

Isolating $t$ :

$t=\sqrt{(2 y_(o))/(g)}$ (5)

$t=\sqrt{(2 (1500 m))/(9.8 m/s^(2))}$ (6)

$t=17.49 s$ (7)

a) Final velocity

Since $V_(oy)=0 m/s$ , equation (3) is written as:

$V_(f)=-gt$ (8)

$V_(f)=-(97.22)(17.49 s)$ (9)

$V_(f)=-171.402 m/s$ (10) The negative sign ony indicates the direction is downwards

c) Range

Substituting (7) in (2):

$x=(97.22 m/s)(17.49 s)$ (11)

$x=1700.99 m$ (12)

Final answer:

The bomb hits the earth at approximately 540.3 km/hr, it takes approximately 17.5 seconds for the bomb to hit the ground, and the bomb's range is approximately 1.36km.

Explanation:

To answer these questions, we're going to use the principles of kinematics that involve motion in a straight line with constant acceleration (that is the acceleration due to gravity in this case). (a) The velocity of the bomb when it strikes the earth can be calculated using the kinematic equation v = u + gt, where u is the initial velocity (0 m/s since the bomb was dropped, not thrown), g is the acceleration due to gravity (approximately -9.8 m/s²), and t is the time. However, we do not know the time yet, so we will use the equation v = sqrt(2×g×h), where h is the height (1500m), and this gives us approximately 540.3 km/hr. (b) The time it takes for the bomb to fall can be calculated using t = sqrt((2×h)/g) which gives approximately 17.5 seconds. (c) The range of the bomb is the horizontal distance it travels, which is the velocity of the plane multiplied by the time it takes for the bomb to hit the ground, or 350 km/hr × 17.5/3600 hr = approximately 1.36km.

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Mark uses a hand break to stop his bicycle. Which kind of force is applied to the bicycle to bring it to a stop?

A. Magnetic

B. Friction

C. Electrical

D. Gravitational

Answers

Answer:

B. Friction

Explanation:

I just took the test & got it right :)

Answer:

Im not sure but it would most likely be Gravitational

Explanation:

Okay! Last question was a warm-up question. And now to get your brain thinking some more, how about another one?:First you eat me, then you get eaten. What am I?

Answers

the correct answer is a fishhook

well the answer is fish bait as the fish eats the bait and then the fish gets eaten ??

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