Can someone tell me some variables that could affect how far a ski jumper could travel in the air and explain the science behind it ? Thanks you will help me a lot if you can answer it !

Answers

Answer 1

Answer:

Some things you could take into consideration are the weight of the jumpers. There height, well more like overall mass. Gravity would be another key factor. The angle at which she jumped could be another variable. Wind resistance could be another important thing. How far she is attempting to jump is an important variable.

Those are just some of the basic things.

Hope I helped. :)

Answer 2

Answer: Performance in ski jumping is determined not only by the motor abilities of the athlete, but alsoto a large extent by the aerodynamic features of the equipment used and by a low body weight. Manyski jumpers were extremely underweight to the point of having a body mass index (BMI =m/h2of16.4 kgm−2(heighth= 1.73m, body massm= 49 kg)

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When the temperature is cold, Tim's tires look under-inflated. This is because the air molecules in the tire ________ causing their kinetic energy to _________ and volume to _______..A). slow down, decrease, contract
B). multiply, increase, fluctuates.
C). stay the same, increase, expand. Eliminate.
D). speed up, decrease, stay the same.

Answers

The correct answer should be D). speed up, decrease, stay the same.

During cold times, air molecules speed up while the energy decreases. Since the volume stays the same, it appears as if the tires look under-inflated, while in reality they're not.

When the temperature is cold, Tim's tires look under-inflated. This is because the air molecules in the tire slow down causing their kinetic energy to decrease and volume to contract. slow down, decrease, contract on USA Test Prep its A.

Who speaks the line "Lord, what fools these mortals be"? A. Oberon
B. Cobweb
C. Mustardseed
D. Puck

Answers

The answer is D.Puck.

♡♡Hope I helped!!! :)♡♡

How much net force is required to accelerate a 50.00kg mass at 4.00 m/s^2

Answers

Answer:

Explanation:

F = m*a = 50 * 4 = 200 N

The acceleration due to gravity for an object on the surface of the Earth is g. The distance from the Earth to the Moon is roughly 60 RE, where RE is the radius of the Earth. What is the centripetal acceleration of the moon during its (roughly circular) revolution around the Earth

Answers

Answer:

The centripetal acceleration that the moon experiences will be almost equal to the gravitational force that the Earth does in the moon,

Now, remember these two things:

F = m*a

and Fg = G*M1*M2/r^2

the first equation says that the force applied to something is equal to the mass of the object times the acceleration.

The second equation is for the gravitational force, where G is a constant, M1 and M2 are the masses of both objects, in this case, the Earth and the moon, and r is the distance.

We know that the acceleration in the surface of the Earth is:

a = Fg/M2 = g = G*M1/(RE)^2

now, for the moon we will have:

a = G*M1/(60RE)^2 = (G*M1/(RE)^2) *(1/60^2)

Here the term in the left is equal to g, so we have:

(G*M1/(RE)^2) *(1/60^2) = g*(1/60^2)

So the centripetal acceleration of the moon is 60^2 = 3600 times smaller than g.

Which phrase describes an atom?a positively charged electron cloud surrounding a positively charged nucleus
a positively charged electron cloud surrounding a negatively charged nucleus
a negatively charged electron cloud surrounding a positively charged nucleus
a negatively charged electron cloud surrounding a negatively charged nucleus

Answers

a negatively charged electron cloud surrounding a positively charged nucleus, the third one is the right answer.

Nucleus consists of electrically neutral neutrons and positively charged protons, so it is positively charged. Electrons, on the other hand are negatively charged. Electromagnetic force bounds atoms to the nucleus.

Final answer:

An atom is described as a negatively charged electron cloud surrounding a positively charged nucleus.

Explanation:

An atom is the basic unit of matter, consisting of a nucleus at its center, composed of protons and neutrons, and electrons orbiting the nucleus. It is the fundamental building block of elements, and the arrangement of electrons determines an atom's chemical properties.

An atom is described as a negatively charged electron cloud surrounding a positively charged nucleus. The nucleus of an atom contains positively charged protons and electrically neutral neutrons, while the negatively charged electrons exist in the electron cloud surrounding the nucleus. This model of the atom is known as the Bohr model, which accurately represents the distribution of electrons in an atom.

Learn more about atom structure here:

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5. Projectile A with mass m is launched at an angle of 20° above the horizontal with a speed v0. Projectile B also with mass m is launched from the same location at an angle of 70° above the horizontal, also with speed v0. Thus, both projectiles have the same initial total energy. a. Which projectile has a larger speed when it hits the ground or do they have the same speed? Explain using energy. b. Which projectile reaches a greater height? Given that both projectiles have the same initial energy, how is this possible?

Answers

Answer:

a) They both have the same final speed.

b) Projectile B reaches a greater height

Explanation:

The initial total energy of both projectiles is the same, and since the initial height is zero, that initial energy is entirely kinetic energy:

$E_0=K_0=(1)/(2)mv_0^(2)$

Now, when the projectiles are going to reach the ground, their height also becomes zero, so the final energy is also entirely kinetic energy:

$E_f=K_f=(1)/(2)mv_f^(2)$

As stated in the conservation of mechanical energy, the final total energy has to be equal to the initial total energy, and then:

$E_0=E_f\n \n (1)/(2)mv_0^(2)=(1)/(2)mv_f^(2)\n\n\implies v_0=v_f$

Finally, since the initial speed is the same for both projectiles, they have the same speed when they hit the ground (a).

Next, we know that the height reached by a projectile depends only of their initial vertical velocity, nor their horizontal one. So, the projectile with the highest initial vertical velocity has to reach a greater height. We use trigonometry to calculate that:

$v_0_A_y=v_0\sin20\°=0.34v_0\n\nv_0_B_y=v_0\sin70\°=0.93v_0$

It means that projectile B has a higher initial vertical velocity, so it reaches a greater height (b).

This is possible because some of the kinetic energy of both projectiles is never transformed to gravitational potential energy (because is related to the horizontal velocity) and this amount of kinetic energy depends on the angle at which the projectile is launched. As their potential energies at the highest points are different, their maximum heights are, too.

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