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2 years ago

a ball is thrown straight up with an initial velocity of 20.0 ft/s. how long dose it take to reach maximum height?

Physics

1 answer:

timama [110]2 years ago

5 0

Answer:

At the maximum height the ball will have an instantaneous velocity of zero. The formula for instantaneous velocity is

v = v₀ + at

Where v is the instantaneous velocity, v₀ is the initial velocity, a is the acceleration due to gravity, -9.8 m/sec², and t is the time.

We need instantaneous velocity to = 0.

0 = 20 - 9.8t : Isolate t => 1st step: Add 9.8t to both sides

9.8t = 20 : Isolate t => 2nd step: Divide both sides by 9.8

t = 2.04 seconds (approximately)

Explanation:

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Newer aircraft jet catapult systems use magnets instead of steam. The launch still takes 1.19 seconds, but the acceleration is a

Westkost [7]

Answer:

33.6 m

Explanation:

Given:

v₀ = 0 m/s

a = 47.41 m/s²

t = 1.19 s

Find: Δx

Δx = v₀ t + ½ at²

Δx = (0 m/s) (1.19 s) + ½ (47.41 m/s²) (1.19 s)²

Δx = 33.6 m

8 0

3 years ago

Two identical loudspeakers are placed on a wall 1.00 m apart. A listener stands 4.00 m from the wall directly in front of one of

natita [175]

Answer:

The phase difference is 0.659 rad.

Explanation:

Given that,

Distance between two identical loudspeakers d= 1.00 m

Distance between speakers and listener r= 4.00 m

Frequency = 300 Hz

Suppose we need to find the phase difference in radian between the waves from the speakers when they reach the observer

We need to calculate the r'

Using Pythagorean theorem

$r'=\sqrt{d^2+r^2}$

Where, d = distance between two identical loudspeakers

r = distance between speakers and listener

Put the value into the formula

$r'=\sqrt{(1.00)^2+(4.00)^2}$

$r'=\sqrt{1.00+16.00}$

$r'=4.12\ m$

We need to calculate the path difference

Using formula of path difference

$|r'-r|=4.12-4.00$

$|r'-r|=0.12\ m$

We need to calculate the wavelength

Using formula of wavelength

$\lambda=\dfrac{v}{f}$

Where, v = speed of sound

f = frequency

Put the value into the formula

$\lambda=\dfrac{343}{300}$

$\lambda=1.143\ m$

We need to calculate the phase difference

Using formula of phase difference

$\phi=\dfrac{2\pi\times|r'-r| }{\lambda}$

$\phi=\dfrac{2\pi\times0.12}{1.143}$

$\phi=0.659\ rad$

Hence, The phase difference is 0.659 rad.

7 0

3 years ago

Which strategy should you use if your research question is too broad for the scope of your project? (1 O narrow the focus of res

Nesterboy [21]

Answer:

"Narrow the focus of research question"

Explanation:

O Narrow the focus of research question

This is good! You can still use your question, but focus in on something so you have a proper research project.

O Add another research question

Would adding another question to an already broad question help? No.

O Use the very first source you find for your project

If your question is too broad, you should not use whatever you see first as it may be incorrect or does not answer the question

O Change the scope of your project

You could, but if you have a set scope for your project (a) you might not be able to change it (b) you don't need to restart

Have a nice day!

I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)

- Heather

3 0

2 years ago

Which mystery primate is a biped? list the characteristics you choose to justify your answer

Vadim26 [7]

Primate B mystery primate is a biped.

The characteristics are:

The vast majority of primates live in trees (Notable exceptions are humans and gorillas).
The majority of primates have upright upper bodies and occasionally walk on two feet (Humans are erect and always exhibit bipedalism).
All primates have smaller noses and matching olfactory brain regions (except Lemurs).
Compared to other mammals, primates have enormous brains for their size. Stereoscopic vision, hand-eye coordination, and manual dexterity are all governed by the brain's enlarged regions.
Considering the size of the animal, long gestations
Primate sociality is rather high in general.
The majority of primates are nocturnal.
The highly enjoyable action of grooming is shared by all highly evolved primates, including humans.

<h3>Primate </h3>

Lemurs, lorises, tarsiers, monkeys, apes, and humans are all included in the biological order called primates. Class Mammalian of the phylum Vertebrate includes creatures with qualities that have evolved recently in the taxonomic classification of the animal kingdom. 19 subtaxa known as orders have been added to the Mammalia classification. Primates are one of such groups, which contains eutherian animals like monkeys and apes. As a result, during a period of 30 million years, new world and old world monkeys underwent different adaptive radiations and were reproductively isolated. The Oligocene epoch saw the evolution of prosimians. About 30 million years ago, all currently extant primates underwent evolution.

Which mystery primate is a biped? list the characteristics you choose to justify your answer

Learn more about primate here:

brainly.com/question/16671781

#SPJ4

6 0

2 years ago

A duck flies 60 m in 6 seconds what is the ducks speed? Show your work plz

Lana71 [14]

Answer:

Wouldn’t his or hers speed be 10m?

Explanation:

because 60 divided by 6 = 10

so 10m per second?

7 0

2 years ago

a ball is thrown straight up with an initial velocity of 20.0 ft/s. how long dose it take to reach maximum height?​

a ball is thrown straight up with an initial velocity of 20.0 ft/s. how long dose it take to reach maximum height?