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3 years ago

A projectile is defined as:

1 answer:

8 0

A projectile is defined as an object that has an initial velocity and follows a path that dependent<span> on the gravitational acceleration.
The gravitational force initially will act on the oposite direction until it reach the maximum height, and right after that, the gravitational force will accelerate the speed of the projectile.</span>

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Un copil care merge pe jos pe calea ferata vede trecand, in decursul unui anumit interval de timp, prin dreptul sau un tren. Ace

krok68 [10]

sorry I dont speak Spanish

3 0

3 years ago

PLEASE HELP<br> The image characteristics are...

VLD [36.1K]

According to the question, the object is placed at 2F

The ray diagram is shown in the figure attached.

According to the figure:

Object AB is at 2F₁

First, we draw a ray parallel to principal axis.

So, it passes through focus after refraction.

We draw another ray which passes through optical center.

So, the ray will go through without any deviation.

Where both refracted rays meet is point A' and the image formed is A'B'

This image is formed at 2F₂

We can say that:

Image is real.
Image is inverted.
Image is exactly the same size as the object.

4 0

3 years ago

If your front lawn is 16.016.0 feet wide and 20.020.0 feet long, and each square foot of lawn accumulates 13501350 new snowflake

asambeis [7]

Answer:

The mass of snow accumulated in the lawn in 1 hour equals 57.024 kilograms

Explanation:

Given

Width of lawn = 16 feet

Length of lawn = 20 feet

Thus total area of lawn equals $16\times 20=320sq.feet$ \

Now it is given that 1 square foot accumulates 1350 new snowflakes each minute thus number of snowflakes accumulated by 320 square feet in 1 minute equals

$320\times 1350=432000$

Now it is given that average mass of each snowflake is $2.20mg=2.20\times 10^{-3}g=2.20\times 10^{-6}kg$

Hence the mass accumulated per minute equals $432000\times 2.20\times 10^{-6}=0.9504kg$

Now since there are 60 minutes in 1 hour thus the mass accumulated in 1 hour equals $0.9504kg\times 60=57.024kg$

4 0

3 years ago

Suppose a scientist made this model.what info did the scientist need to know in order to make the model

Airida [17]

Suppose I wanted to answer this question about the model.
What info about the model would I need to know in order to
make any intelligent guess about the model ?

Hint:
It would really help if I could SEE the model, or at least a photo of it.

4 0

4 years ago

The speed at which the package hits the ground is really fast! If a package hits the ground at such a speed, it can be crushed a

Fed [463]

Answer:

B. Decrease the plane’s speed and height

Explanation:

Decrease in speed of plane:

When the speed of the plane is decreased then initial velocity of the package will be lesser. As a result, final velocity will also be lesser because in this case final velocity depends upon the initial velocity.

Decrease in height:

According to law of conservation of energy:

Loss in potential energy = Gain in Kinetic energy

mgh = ½ mV^2

It means with the decrease in height less potential energy will be converted to kinetic energy. As package has constant mass so it will gain less velocity.

7 0

4 years ago