What is the best angle for maximum height and air time? explain why you think this is so.

Answers

Answer 1

Answer:

Answer: 90 degrees

Explanation:

The projectile will have the greatest air time and height when the launch is the most vertical. At 90 degrees, the launch is all vertical.

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Lead has a density of 11.3 g/cm3 and a mass of 282.5 g. What is its volume?

Answers

Well we know that density=mass divided by volume, so let's substitute :)

11.3=282.5/V

Now we know that 282.5 has to be divided by SOMETHING in order to get 11.3.

You can waste time trying every number under the sun, or you can use a little trick I learned in elementary school which is to divide 282.5 by 11.3. This works because it shows how many times 11.3 goes into 282.5 which is the volume of this "piece of" lead. Since 11.3 goes perfectly 25 times into 282.5, the Volume of this "piece of" lead is 25 cm³. :)

Which one of the following is true a. momentum results in a change of force
B. a force results in a change of momentum

Answers

Answer:

Explanation:

You need a specific force to change the momentum of something.

Hope this helps!

Which of the following lists the stars in order from least density to greatest density?A. white dwarf, neutron star, main sequence star, giant
B. giant, main sequence star, white dwarf, neutron star
C. white dwarf, neutron star, giant, main sequence star
D. neutron star, white dwarf, main sequence star, giant

Answers

The following lists ofstars in order from least density to greatest density are giant, main sequencestar, white dwarf, neutron star. The answer is letter B. Aside from neutronstar being the densest star, it is also the smallest star compared to the giantstar, as its name implied.

Answer:

Explanation:

as a medium star

How is the horizontal component of velocity for a projectile affected by the vertical component?

Answers

It isn't. The horizontal and vertical velocities are separate. You separate that velocity into the horizontal component which is constant, disregarding air resistance, and vertical velocity which is changed by the acceleration due to gravity. Make calculations separately because they do not influence each other.

Charles's law states that at a constant pressure, the volume of a given amount of gas is _____ to its absolute temperature.

Answers

Directly Proportional

What affect does doubling the net force have on the acceleration of the object (whenthe mass of the object stays the same)? Identify a set of two trials that support your answer to question 1

Answers

Answer: The acceleration doubles

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Explanation:

Consider a mass of 10 kg, so m = 10

Let's say we apply a net force of 20 newtons, so F = 20

The acceleration 'a' is...

F = ma

20 = 10a

20/10 = a

2 = a

a = 2

The acceleration is 2 m/s^2. Every second, the velocity increases by 10 m/s.

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Now let's double the net force on the object

F = 20 goes to F = 40

m = 10 stays the same

F = ma

40 = 10a

10a = 40

a = 40/10

a = 4

The acceleration has also doubled since earlier it was a = 2, but now it's a = 4.

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In summary, if you double the net force applied to the object, then the acceleration doubles as well.

Acceleration is directly proportional to the net force on an object, and inversely proportional to its mass.

So if an object's mass stays the same while the net force on it doubles, then its acceleration will also double.

We don't know anything about the "trials". This sounds like it might be a follow-up to a lab experiment that was performed when we weren't there.

We also don't know anything about "question 1".

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