Someone help me plz. I have no idea. ​

Answer:

D is correct

Explanation:

Answer:

the answer is 49 ms do yeah

Answer:

72

Explanation:

hehe

Answer:

c,e,f,d

Explanation:

Answer:

C) No air resistance or gravity

Explanation:

For headwind imagine an airplane flying. The wind is hitting the front of the aircraft. Just like the wind is hitting the front of the ball. This increases the drag force and the ball will eventually slow and let the force of gravity act.

For tailwind imagine a sailboat. The wind catches the sail a pushes the boat. Both the wind and boat are going the same way so the angle of the wind is coming from behind. This is why it is called a tail wind.

If a ball is thrown, it has wind resistance and gravity. Otherwise just imagine the ball traveling all around the earth. Because the ball only has the force of lift and thrust, the ball will stay in motion until it hits something strong enough to counteract its thrust.

The description does not state any contact with another object. Also the ball will immediately stop if it has less newtons of force.

Answer: By studying seismic waves scientists have learned about the layers of the Earth.

Answer:

Air resistance

Explanation:

Because the air gives a much greater resistance to the falling motion of the feather than it does to the brick. The air is actually an upward force that is acting against gravity and slowing down the rate at which the feather falls.

The uniform motion ratios allow finding which intervals have constant velocity, the correct answers are

         BC       Positive velocity

         CD       Zero speed

         DE       Negative velocity

Kinematics studies the movement of bodies, establishing relationships between position, velocity and acceleration. In the special case that the acceleration is zero the motion is called uniform movement

        v = [tex]\frac{\Delta_x}{\Delta t}[/tex]

        Δx = v Δt

Where v is average velocity, Δx is the position variation and Δt is the time variation in the analyzed interval.

This equation we see that the relationship between displacement and time is linear, let's analyze each interval given in the graph

AB interval

   In this interval the graph shows a curve whereby the movement is accelerated

BC interval

  In this interval the graph is a line with a positive slope, therefore the movement is uniform with positive velocity

CD interval

    In this part we have a line of zero slope

     In motion it is uniform with zero speed, that is, the car is stopped

DE interval

    The graph of this section is a line with a negative slope, consequently the velocity is negative.

With this analysis we see that the only interval that the movement is accelerated is the AB interval  

In conclusion, using the uniform motion relationships we can find that intervals have constant velocity, the correct answers are

         BC     Positive velocity

         CD     Zero speed  

         DE     Negative velocity

Learn more about average speed here:

https://brainly.com/question/22831524

Answer:

option c

Asexual reproduction requires only one parent and produces identical offspring, while sexual reproduction requires two parents and produces non-identical offspring.

Answer:

C

Explanation:

Answer:

B. One group of fabric is treated with the chemical, and the other group is not. Then each group is exposed to water.

Explanation:

Answer:

79.8 is the answere

I hope this HELP :)

Explanation:

Here, initial velocity is u=18.5m/s and final velocity is v=46.1m/s

Time taken t=2.47s

If a be the acceleration of the car.

Using v=u+at,

46.1=18.5+a(2.47)

⟹ a=11.17m/s

2

If d be the distance traveled by car.

Using formula v

2

−u

2

=2ad,

(46.1)

2

−(18.5)

2

=2(11.17)d

⟹ d=79.8m

9514 1404 393

Answer:

Explanation:

The most straightforward way to compute the resultant of two vectors is to add their x- and y- components. In the attached, we have labeled the 30 N force "B" and the 40 N force "A". Their respective (x, y) components are ...

  A = 40(cos(0°), sin(0°)) = (40, 0)

  B = 30(cos(62.72°), sin(62.72°)) = (13.75, 26.66)

Then the components of the resultant are ...

  R = A + B = (40, 0) +(13.75, 26.66) = (53.75, 26.66)

Its magnitude is found from the Pythagorean theorem:

  |R| = √(53.75² +26.66²) = 60.00

Its direction is found from the components using the arctangent function:

  ∠R = arctan(26.66/53.75) = 26.38°

In a sort of shorthand notation, ...

  R = 60.0∠26.4°

__

Alternate solution

In order to perform the above calculation, you need to know the angle between the vectors. The other angle in the parallelogram is the supplement of this. So, you can find the resultant by solving the triangle OAR, where O is the origin. Angle A in that triangle will be 180° -62.72° = 117.28°. This gives you enough information to use the Law of Cosines.

  OR² = OA² +AR² -2(OA)(AR)cos(A)

  OR² = 40² +30² -2·40·30·cos(117.28°) ≈ 3600.0

  |R| = √3600 = 60

Then you can find the angle AOR using the law of sines.

  sin(AOR)/30 = sin(117.28°)/60

  ∠AOR = arcsin(sin(117.28°)/2) = 26.38°

So, you now know ...

  R = 60.0∠26.4°

Answer:

Explanation:

The mass of the object can be found by using the formula

[tex]m = \frac{f}{a} \\ [/tex]

f is the force

a is the acceleration

From the question we have

[tex]m = \frac{44}{15.3} \\ = 2.875816...[/tex]

We have the final answer as

Hope this helps you

Answer:

2.9

Explanation:

In the equation you get 2.88 but you round that to the nearest tenth so you get 2.9

Answer:

Explanation:

The highest surface part of a wave is called the crest, and the lowest part is the trough. The vertical distance between the crest and the trough is the wave height. The horizontal distance between two adjacent crests or troughs is known as the wavelength...

Answer:

It would be transformer

Explanation:

hope this helped

Answer:

transformer

Explanation:

got it right

Answer:

Positive

Explanation:

Because there is no electrons.

its a solid from the pressure they put on a tennis ball would make it full of moving at fast speed matter bites compacted together but still moving.

Answer:

See the explanation below

Explanation:

We must perform a sum of forces on the body, that sum of forces is equal to zero. That is, the body is in balance and does not move.

ΣF = 0

3 - 3 = 0

This force is negative and acts by pointing downwards.

Answer: ow consider a book sliding from left to right across a tabletop. Sometime in the prior history of the book, it may have been given a shove and set in motion from a rest position. Or perhaps it acquired its motion by sliding down an incline from an elevated position. Whatever the case, our focus is not upon the history of the book but rather upon the current situation of a book sliding to the right across a tabletop.

Explanation:

The mass of the Skater is 50 Kg.

We have a skater who is under the influence of 30 Newton of force.

We have to determine the mass of skater.

Newton's second law of motion states that the rate of change of momentum is directly proportional to the force applied. Mathematically-

[tex]$F\;\alpha \; \frac{dp}{dt}[/tex]

According to the question, we have -

Force on Skater -  30 N

Acceleration Produced -  0.6 [tex]m/s^{2}[/tex]

We know -

F = ma

30 = m x 0.6

m = 30/0.6 = 50 Kg

Hence, the mass of the Skater is 50 Kg

To solve more questions on Force, visit the link below-

https://brainly.com/question/20841272

#SPJ2

Answer:

Va = 3.77 [m/s]

Explanation:

We know that speed is defined as the relationship between the distance traveled in a given time.

v = L/t

where:

v = speed [m/s]

L = distance = 1000 [m]

t = time = 3 [min] = 180 [s]

Therefore the first speed is:

v = 1000/180

v = 5.55 [m/s]

Now the second velocity:

t = 5 [min] = 300 [s]

v = 600/300

v = 2 [m/s]

The average speed is calculated by the sum of both speeds divided by two.

Va = (5.55 + 2) /2

Va = 3.77 [m/s]

Answer:

Explanation:

Using the formula for calculating range expressed as;

R = U√2H/g where

R is the distance moves in horizontal direction = 18.4m

H is the height

U is the velocity of the baseball = 40m/s

g is the acceleration due to gravity = 9.8m/s²

Substitute the given parameters into the formula and calculate H as shown;

18.4 = 40√2H/9.8

18.4/40 = √2H/9.8

0.46 = √2H/9.8

square both sides;

(0.46)² = (√2H/9.8)²

0.2116 = 2H/9.8

2H = 9.8*0.2116

2H = 2.07368

H = 2.07368/2

H = 1.03684m

Hence the ball is 1.03684m below the launch height when it reached home plate.

Answer:

when a government abuses its power its called tyranny and people might try to overthrow the government

Answer:

mass (m) = 0.075 kg

acceleration (a) = 550000 m/[tex]s^{2}[/tex]

F = ( 0.075 kg )( 550000 m/[tex]s^{2}[/tex] ) = 41250 N

Explanation:

F = ma ; force is equal to mass times acceleration

mass (m) = 0.075 kg

acceleration (a) = 550000 m/[tex]s^{2}[/tex]

F = ( 0.075 kg )( 550000 m/[tex]s^{2}[/tex] ) = 41250 N.

do you get these options in the drop down?

Answer: Im questing this what your looking for

Explanation:

Answer:

a) How the cooling speed changes with glasses of different materials?

b) The glass material influences the cooling rate

c)  temperatures initial, final and the time

d) the control variable  is time

e)temperature of the beverage heated in a given time

f) best material for insulation was expanded

Explanation:

This is a problem of how to formulate an experiment using the scientific method

a) a question for this problem to follow.

     How the cooling speed changes with glasses of different materials?

b) the hypothesis of the experiment is:

    The glass material influences the cooling rate

c) we have the independent variable that the experimenter controls

   the material of the glass, the initial temperature of the drink and the cooling time

the dependent variable is the one that is measured

    the temperature of the drink and the time  

d) the control variable  is time

e) the evidence would be the temperature of the beverage heated in a given time

f) When conducting the experiment, the thermal conductivity of the material is the most important factor, the one with the lowest thermal conductivity is the one that keeps the drinks longer

in general, the conductivity ends of paper 0.24 W/m K  and that of plastic is 0.06 W / m K, of expanded  0.03 W / m K

From these values ​​it is experienced that the best material for insulation was expanded

Answer:

yes

Explanation:

Answer:

Explanation:

The mass of the object can be found by using the formula

[tex]m = \frac{f}{a} \\ [/tex]

f is the force

a is the acceleration

From the question we have

[tex]m = \frac{12}{4} \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

The new speed of the ball is 176.43 m/s

Explanation:

Given;

mass of the ball, m = 7 kg

initial speed of the ball, u = 5 m/s

applied force, F = 300 N

time of force action on the ball, t = 4 s

Apply Newton's second law of motion;

[tex]F = ma = \frac{m(v-u)}{t}\\\\m(v-u) = Ft\\\\v-u = \frac{Ft}{m}\\\\v = \frac{Ft}{m} + u[/tex]

where;

v is new speed of the ball

[tex]v = \frac{Ft}{m} + u\\\\v =\frac{300*4}{7} + 5\\\\v = 176.43 \ m/s[/tex]

Therefore, the new speed of the ball is 176.43 m/s