I’m a freshman who doesn’t know about physics, help me out?

Answer:

1) t ≈ 14.985 seconds

2) The maximum height reached ≈ 1101.4 meters

3) The velocity with which it hits the ground = 147 m/s

4) The total time in the air ≈ 29.969 seconds  

Explanation:

1) The given information are;

The initial velocity of the mortar shell = 147 m/s

The direction of the mortar shell = Vertically upwards

Therefore, we have, from the equation of motion

v = u - g·t

Where;

v = The final velocity = 0 at maximum height

u = The initial velocity = 147 m/s

g = The acceleration due to gravity = 9.81 m/s²

Therefore, we have;

0 = 147 - 9.81 × t

9.81 × t = 147

t = 147/9.81 ≈ 14.985 seconds

t ≈ 14.985 seconds

2) From the equation of motion, v² = u² - 2×g×s

Where;

s = The maximum height reached

We have;

0² = 147² - 2×9.81×s

2×9.81×s = 147²

s = 147²/(2×9.81) ≈ 1101.4 meters

The maximum height reached ≈ 1101.4 meters

3) The velocity with which it hits the ground is equal to the initial velocity = 147 m/s

4) The total time in the air = 2 × The time it takes to reach maximum height

The total time in the air = 2 × 14.985 ≈ 29.969 seconds

The total time in the air ≈ 29.969 seconds

Answer:

D

Explanation:

it's the only negative one

Answer:

letter C.

Explanation:

Answer:

Cutting down trees

Explanation:

The roots of trees often hold settiments in place, thus removing these strong natural barriers makes it easier for erosion to occur.

Answer:

here lol

Explanation:

Answer:

when the connection of the batteries is parallel negative to negative n positive to positive is called parallel connection

Explanation:

Answer: 43.5

and now I'm typing cause it said the answer had to be at least 20 characters

Answer:

0.0013 m/s

Explanation:

Speed in inches per minute = 3 inches per minute

Speed in m/s =?

Next, we shall convert 3 inches per minute (3 in/min) to metre per minute.(m/min)

39 in/min = 1 m/min

Therefore,

3 in/min = 3 in/min × 1 m/min / 39 in/min

3 in/min = 1/13 m/min

Finally, we shall convert 1/13 m/min to m/s. This can be obtained as follow:

1 m/min = 1/60 m/s

Therefore,

1/13 m/min = 1/13 m/min × 1/60 m/s / 1 m/min

1/13 m/min = 1/780 m/s

1/13 m/min = 0.0013 m/s

Thus, 3 in/min is equivalent to 0.0013 m/s.

Therefore the speed of the snail in m/s is 0.0013 m/s

Answer:

C

Explanation:

PLACING BULBS IN SERIES

Increasing the number of bulbs decreases the brightness of the bulbs.

The resistance increases.  In a series circuit, adding bulbs increases the resistance in the circuit. A complete circuit requires the electrons to move from the negative terminal of the battery to the positive terminal.  When one bulb is unscrewed it opens the circuit preventing a complete circuit and the electrons cannot return to the battery.

PLACING BULBS IN PARALLEL

Two bulbs in parallel are brighter than two bulbs in series.   In a parallel circuit each bulb is in its own circuit.  As bulbs are added the resistance in the circuit decreases since each circuit is another pathway for electrons to move from one end of the circuit to the other.

If you unscrew one bulb and all the others stay lit, it is a parallel circuit because each bulb in a parallel circuit has its own path to the battery.

The brightness of the bulbs reduces as the number of bulbs increases in series. Resistance rises in intensity. Adding bulbs to a series circuit raises the circuit resistance. The electrons must pass from the battery's negative to positive terminals in order for the circuit to be complete. When one bulb is removed, the circuit is broken, making it impossible for the electrons to return to the battery.

In comparison to two bulbs in series, two bulbs in parallel are brighter. Each bulb is in its own circuit when the circuits are parallel. As more bulbs are added, the resistance in the circuit reduces because each additional circuit provides an additional route for electrons to travel from one end to the other.

You  can determine the type of circuit used in this model by unscrewing one bulb and all the others stay lit, it is a parallel circuit because each bulb in a parallel circuit has its own path to the battery. Hence, option(C) is correct.

Learn more about parallel combination here:

https://brainly.com/question/14547003

#SPJ2

Answer is A 2.8 x 10^-8 N, to the right

The net gravitational force on mass A due to masses B and C is required.

The correct option is a. [tex]2.8\times 10^{-8}\ \text{N}[/tex] to the right.

G = Gravitational constant = [tex]6.674\times 10^{-11}\ \text{Nm}^2/\text{kg}^2[/tex]

[tex]r_{AB}[/tex] = Distance between A and B = 0.4+0.1 = 0.5 m

[tex]r_{AC}[/tex] = Distance between A and C = 0.1 m

[tex]m_A=m_B=m_c[/tex] = Mass of each particle = 2 kg

The required force is

[tex]F_A=F_{AB}+F_{AC}\\ =\dfrac{Gm_Am_B}{r_{AB}^2}+\dfrac{Gm_Am_C}{r_{AC}^2}\\ =Gm^2\left(\dfrac{1}{r_{AB}^2}+\dfrac{1}{r_{AC}^2}\right)\\ =6.674\times 10^{-11}\times 2^2\left(\dfrac{1}{0.5^2}+\dfrac{1}{0.1^2}\right)\\ =2.8\times 10^{-8}\ \text{N}[/tex]

The magnitude of force will be [tex]2.8\times 10^{-8}\ \text{N}[/tex]

The direction will be towards the right since C is closer to A.

Learn more:

https://brainly.com/question/1835915

https://brainly.com/question/7038796

Answer:

3.6 × 10^5 J

Explanation:

Work Done = Energy

Energy = Power × time

Energy = 200 × 1800

= 360000 J

W =

[tex]3.6 \times 10 {}^{5} j[/tex]

Answer:

Michael

Explanation:

160cm = 62.9921 inches

70in > 63in

Answer:

It is Germanium(Ge)

Explanation:

Given parameters:

Distance traveled  = 176m

Initial velocity  = 2.3m/s

Unknown:

Acceleration  = ?

Solution:

Acceleration is the change in velocity with time. To solve this problem, we apply one of the motion equations;

              V²   = U²  + 2as

 where V is the final velocity

              U is the initial velocity

               a is the acceleration

               s is the distance

       final velocity is 0;

                   0²  = 2.3² + 2 x a x 176

                   -5.29  = 352a

                    a  = - [tex]\frac{5.29}{352}[/tex]   = - 0.015m/s²

Answer:

kid

Explanation:

Answer:

Im not smart

Explanation:

but im your bff

Answer:

it explain how everythings work you should work with the speed of light multiply with the distance of the equator

Answer:

16

Explanation:

The store where you work receives a shipment of stuffed animals. One box contains 48 teddy bears, and the other box has 32 stuffed dogs.

We find the factors of 32 and 48

The factors of 32 are: 1, 2, 4, 8, 16, 32

The factors of 48 are: 1, 2, 3, 4, 6, 8, 12, 16, 24, 48

The greatest common factor is 16.

Hence,

The greatest number of stuffed animals you can have in a row is 16

Answer: For many things, like reproduction and releasing bad bacteria.

Explanation: We all have our parts, but what’s most important is our private parts. It helps us to use the restroom, and release the bad bacteria, without it, we’d die from holding it in! But also, it helps the world grow, because to reproduce we need those parts.

Answer:

2,421,666 miles

Explanation:

light travels 186,282 miles per second in a vaccum.

So 186,282 × 13 = 2,421,666

Answer:

A it is less dense than water

Explanation:

The density, of a substance is its mass per unit volume

Answer:

evaporation

Explanation:

when the liquid is heated it evaporates until it becomes air

Answer:

the carrying capacity will decrease density dependent

Explanation:

The limiting factor of the disease is density dependent and will decrease the carrying capacity of the population because the disease that affect the population operate when the number of organisms in per unit area get to a specific level , it's affected the population when the population per unit are reached a certain level and the disease decrease the carrying capacity of the population. Carrying capacity is the average population size of organisms in an habitat. As the lobsters population is affected by disease, the population sizes reduced because many of the lobsters would of died and inactive, thereby causing a reduction in the size and capacity.

Answer:

1,2: When simple molecular substances melt or boil, it is these weak intermolecular forces that are overcome. The covalent bonds are not broken. Relative little energy is needed to overcome the intermolecular forces, so simple molecular substances have a low melting and boiling points.

3: Water, Almost no living thing can survive without water. Water is everywhere on our planet. It is the reason we have an organic life on earth. A water molecule consists of one oxygen atom combined with two hydrogen atoms. We use water throughout day and night; in drinking, cooking, household needs, industries, and agriculture. Apart from these general uses of water, you might be amazed to know that water plays a major role in volcanic eruptions.

Answer:

left brain the left brain is your rapid more irrisponsibe side while your right cortex thinks about the potential outcomes

Answer:

if it's combined forces then it would be 25N if it was an unbalanced force then it would be 15N

Answer:

[tex] the \: average \: speed \: of \: the \: boat \: between \: 4 \: and \: 6 \: \\ minutes \: = \frac{1000 - 500}{6 - 4} = \frac{500}{2} = 250[/tex]

note: cant really see the measuring units for clear unit for the value, however the average speed is 250 meter/mins, from observation.

Answer:

A drop shot is the badminton shot that you perform when you are in the back of your court and you hit the birdie so it lands in the front part of your opponent's side

Explanation:

Answer:

Because the output force is greater than the input force, the input distance must be greater than the output distance.

Explanation:

Answer:

It is D.

Explanation:

Sound travels by the movement of particles bumping against each other and if there is no particles in a vacuum(space) then there is no sound. Light can travel through space because it doesn't need to travel by/through particles.

Answer:

[tex]\boxed {\tt 3.6 \ seconds}[/tex]

Explanation:

Time can be found by dividing the distance by the speed.

[tex]t=\frac{d}{s}[/tex]

The distance is 45 meters and the speed is 12.5 meters per second.

[tex]d= 45 \ m \\s= 12.5 \ m/s[/tex]

[tex]t=\frac{45 \ m}{12.5 \ m/s}[/tex]

Divide. Note that the meters, or "m" will cancel each other out.

[tex]t=\frac{45 }{12.5 \ s}[/tex]

[tex]t=3.6 \ s[/tex]

It will take the dolphin 3.6 seconds to swim a distance of 45 meters are 12.5 meters per second.

Answer:3.6 seconds

Explanation: 45/12.5 m/s is 3.6s

Answer:

compresses and expands

Answer:

compreses and expands

Explanation:

because it is