you measure that it takes 0.75 seconds for a leaf to fall from a tree to the ground. the leaf experiences air resistance as it falls. if there were no air resistance, how long would it take the leaf to fall?

Answers

Answer 1

Answer: There's not enough information given in the problem to calculate that answer.

A leaf falling from a tree on Earth, a sheet of printer paper falling off the back
of a truck on Venus, and a steel ball sinking through a bucket of Scotch whiskey
on Mars, might all reach the bottom in 0.75 second. The time it would take each
of them to fall the same distance through a vacuum in the same place would be
different, and the 0.75 second is not enough to enable you derive it ... even if
you did know the acceleration of gravity in each place. All you can say is that
without resistance, it would fall faster, and hit bottom in less than 0.75 second.

Answer 2

Answer:

Answer:

less than 0.75 seconds

Explanation:

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What is the mass of a falling rock if it produces a force of 147 n?
F=
M=
A=

Answers

F=147N;

Acceleration=9.8m/s2;

Mass=15kg

Help with number 32
Apparently the answer is 4 but I have no idea why

Answers

All you have to remember is that when the source is APPROACHING the observer,
the frequency seems HIGHER than what's actually leaving the source.

The siren is wailing at 1,000 Hz.

(1). 30.0 Hz . . . that's way lower

(2). 9.19 x 10² Hz = 919 Hz . . . that's lower

(3). 1.00 x 10³ Hz = 1,000 Hz . . . that's exactly the same

(4). 1.10 x 10³ Hz = 1,100 Hz . . . that's the only choice that's higher than 1,000 Hz.

How do you change Newtons into kilograms

Answers

You don't. You can only convert units when they're both units of the
same physical quantity. In this case, 'newton' is a unit of force, but
'kilogram' is a unit of mass. Those are not the same physical quantity,
so they don't convert.

The closest you can get is to find the weight of some mass when you know
the gravity in the place where the mass is. The weight of some mass is

(mass in kilograms) x (gravity in meters per second²)

and the answer is in newtons.

On Earth, the gravity is 9.8 meters per second², so each kilogram of mass
weighs 9.8 newtons.

In other places, like on the moon or on Mars, the gravity is different, so
a kilogram weighs something different.

The Hubble telescope’s orbit is 5.6 × 105 meters above Earth’s surface. The telescope has a mass of 1.1 × 104 kilograms. Earth exerts a gravitational force of 9.1 × 104 Newtons on the telescope. The magnitude of Earth’s gravitational field strength at this location is

Answers

The gravitational field is the Force divided by the mass

Call g the gravitational fiel, F the force exerted by the earth and m the mass of the telescope.

g = F / m

g=9.1x10^4 N / 1.1 x 10^4 kg = 8.27 N/kg

Note that the unit N/kg is equivalent to m/s^2

Planets in our solar system do not revolve around the sun in perfect circles. Their orbits are more like ovals. Which term do scientist use to describe these orbits

Answers

Planets in our solar system do not revolve around the sun in perfect circles. They revolve in the elliptical orbits.

What is the solar system?

The solar system consists of the planet's satellites, as well as numerous comets, asteroids, and meteoroids, as well as the interplanetary medium.

Planets in our solar system do not revolve around the sun in perfect circles. They revolve in the elliptical orbits.

Hence, option D is correct.

To learn more about the solar system, refer to the link;

brainly.com/question/1207587

#SPJ2

Answer:

It is most likely the word elliptical.

Explanation:

Usually the term elliptical refers to the oval-like shape of a substance or path of an object. The question states, "Planets in our solar system do not revolve around the sun in perfect circles. Their orbits are more like ovals." Because the planets orbit around the sun in an oval-like path, those orbits can be described as elliptical. Scientists also normally use this word to describe the same thing; Therefore, your answer is elliptical.

The speed of sound waves through two different media, steel and air, was recorded. According to the graph, sound waves travel. A) through steel, but not through air
B) faster through steel than through air
C) faster through air than through steel
D) through steel and air at similar speeds

Answers

Answer: The correct answer is Option B.

Explanation:

Sound waves are a type of longitudinal waves. These waves are the waves in which particles of the medium travel in the direction of the wave. These waves require a medium to travel.

Sound waves travel faster in solids than in the gaseous medium because the particles in solid state lie close to each other and the vibrations of the sound waves travel faster when the particles lie closer to each other.

Hence, the correct answer is Option B.

Faster through steel than through air, B.

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