The director of the swimming program at the YFCA wanted to try out a new method of teaching. For half the summer session he told his instructors to use their usual teaching methods. Then half way through the summer he had all the instructors switch to his new method. Between the middle and end of the summer a significant portion of the students showed marked improvement. What is the independent, and dependent variable, and confound.

Answer:

They both arrive at 1:00 PM

Explanation:

Amount Davien has to drive : 40km

Amount Jackson has to drive = 50km

Davien moves at 40km/h,

Therefore, it only takes Davien 1 hour to get there.

12:00 PM + 1 hour = 1:00 PM

Jackson moves 100km/h

He needs to drive 50 min, so 50/100 = 1/2

It takes him half an hour, or 30minutes

If he leaves at 12:30, then he gets there at 1:00 PM

Answer:

A)Opposite direction

Explanation:

hope this helps ;)

Answer:

The net force is 10 N.

Explanation:

A "net force" occurs when a particular object accelerates. It refers to the total number of forces that act on an object.

The boy pulling the cart and the other pushing it do their actions in the same direction. The force of pulling is 6 N while the force of pushing is 4 N. This means that the total force will not be cancelled.

To get the net force, add both forces since they are in the same direction (east).

Net force = 6 N + 4 N

Net force = 10 N (Newtons)

Answer:

state population

Explanation:

bestie you can find it on Constitution on article l

Answer:

Vrel_jon's = 15 [m/s] to the right

Explanation:

Relative velocity is defined as the relative motion between two bodies, taking into account the directions of motion.

Relative velocity is defined as the relative motion between two bodies, taking into account the directions of motion. The relative velocity is defined as the algebraic sum of the velocities, if the movements are opposite the vectors are subtracted, as will be done below.

Vrel = 20 - 5 = 15 [m/s]

A person watching Jon sees him moving to the right at a speed of 15 [m/s]

Answer:

The atoms in Damien’s candy are vibrating faster.

When the atoms in something are going at rapid speeds they create heat.

Answer:

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

From the question

mass = 10 kg

acceleration = 2 m/s²

We have

Force = 10 × 2

We have the final answer as

Hope this helps you

Explanation:

given that the raven flies south for

time= 10 sec

speed= 10km/s

we know that speed=distance/time

distance=speed*time

distance=10*100

distance=1000m

distance=1km

also flies

distance=0.5km = 500m

time= 50 sec

speed= distance/time

speed=500/50

speed= 10m/s

speed= 0.01km/s

The average speed of an object is defined as the distance traveled divided by the time elapsed.

average speed= (1000+500)/10+50

average speed= (1500)/60

average speed= 25m/s

average velocity= (10km/s+0.01km/s)/2= 10.01/2= 5.005km/s

Answer:

the answer is 19 ,30 (second) times 0.5= 15

15+4= 19

After Paco drives his scoter west with an initial velocity of 4 m/s and then accelerates at 0.5 m/s² for 30 s, his final velocity is 19 m/s, so the correct option is the fourth.  

The final velocity of Paco can be calculated with the following equation:

[tex] v_{f} = v_{i} + at [/tex]

Where:

[tex] v_{f}[/tex]: is the final velocity =?

[tex]v_{i}[/tex]: is the initial velocity = 4 m/s

a: is the acceleration = 0.5 m/s²

t: is the time 30 s

Hence, the final velocity is:

[tex] v_{f} = 4 m/s + 0.5 m/s^{2}*30 s = 19 m/s [/tex]

Therefore, the correct option is 19 m/s.    

You can find more about acceleration and velocity here: https://brainly.com/question/9163788?referrer=searchResults  

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Answer:

Q₁ = 15.78 KJ

W = 5.76 KJ

Explanation:

First we find efficiency of this ideal Carnot engine:

Efficiency = 1 - T₂/T₁

T₁ = source temperature = 125°C + 273 = 398 K

T₂ = Sink Temperature = -20°C + 273 = 253 K

Therefore,

Efficiency = 1 - 253 K/398 K

Efficiency = 0.365 = 36.5%

Now, we find expelled heat (Q₂), by using latent heat of fusion of ice:

Q₂ = mH

where,

m = mass of ice melted = 30 g = 0.03 kg

H = Latent Heat of Fusion of Ice = 3.34 x 10⁵ J/kg

Therefore,

Q₂ = (0.03 kg)(3.34 x 10⁵ J/kg)

Q₂ = 1.002 x 10⁴ J = 10.02 KJ

Now, we use another formula of efficiency to find absorbed heat (Q₁):

Efficiency = 1 - Q₂/Q₁

0.365 = 1 - 10.02 KJ/Q₁

10.02 KJ/Q₁ = 1 - 0.365

Q₁ = 10.02 KJ/0.635

Q₁ = 15.78 KJ

Now, for work done we have the formula:

W = Q₁ - Q₂

W = 15.78 KJ - 10.02 KJ

W = 5.76 KJ

Answer:

around 98 meters per second.

Explanation:

Instantaneous velocity can be found with a equation.

Vf=Vi+At

Since it fell and had no initial velocity the equation becomes

Vf=At

The Acceleration is 9.8 m/s^2

So the velocity of it fell for ten seconds is

Vf=9.8m/s^2 * 10

Vf= 98 m/s

Explanation:

derive its name from a Native American word meaning wild onion

Answer:

This question appears incomplete

Explanation:

However, this question seeks to seek our knowledge of Lenz law which states that the current produced by an induced emf (electromotive force) moves/flows in the direction opposite to the change in flux that induced the emf.

From this law, it can be noted from the question that the magnetic pole produced (at P), when the south pole of the magnet is brought towards the solenoid, is the south pole while the magnetic pole produced (at P), when the south pole of the magnet is taken away/changed from the solenoid, is the north pole.

It should be noted that solenoid is an electromagnetic device (and can hence be used to induce emf) that can convert electrical energy to mechanical energy.

Answer:

The pressure of the air molecules inside the pen cap increases and the volume occupied by the air decreases such that the combined volume occupied by the pen cap and the air volume reduces while the combined mass of the pen cap and the air molecules remain the same

Given that density = The mass/Volume, we have that the density varies inversely as the volume, and as the volume reduces, the density increases

Upon squeezing, therefore, as the new combined density of the pen cap and the air molecules rises to more than the density of the water in the bottle, then, the pen cap air molecule is relatively more denser than the water, which will result in the pen cap sinking to the bottom of the bottle

Explanation:

Given parameters:

Mass of Dogsled  = 600kg

Force = 150N

Unknown:

Acceleration of the sled = ?

Solution:

Force is a physical quantity and can be expressed as a product of mass and acceleration.

       Force  = mass x acceleration

   Since acceleration is unknown, we input the parameters and solve for it;

      150  = 600 x acceleration

     Acceleration  = [tex]\frac{150}{600}[/tex] = 0.25m/s²

The acceleration of the sled is 0.25m/s²

Answer:

d

Explanation:

15.15 amps lowing through the bulb can Jonathan claim for his second electric circuit

Electronic components like resistors, circuitry, capacitors, inductors, and diodes are connected by conductive cables or traces that allow electric current to flow between them.

It is a specific kind of electrical circuit, and it is called as electronic rather than electrical, there usually needs to be at least each active component present.

In this circuit Signals can be amplified, calculations can be made, and data can be transported from one location to another thanks to the combination of factors and wires.

Electric current is generated by a power source like battery, and can travel through conductors such as wires, before returning to the power source. Electric circuits can be divided into two types: series and parallel circuits.

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Answer:

c. use tongs

Explanation:

Answer:

S. offspring recieve a mix of genes from two different parents

Offspring acquire genes that are exactly the same as one parent’s genes. Option B is correct.

Given that,
To choose the statement best explains the genetic variation that results from sexual reproduction.

Sexual reproduction is the process of creating new organisms by combining the genetic details of two individuals of different genders. The genetic details in most animals is carried on chromosomes in the nucleus of reproductive cells called gametes, which unite to form a diploid zygote.

Here,
The solution is due to the fact that each parent has two distinct sets of genes. Furthermore, each parent only passes on half of their DNA to their offspring. And that the half that is passed on is arbitrary. All of this ensures that each child is born with a distinct set of genes.

Thus, Offspring acquire genes that are exactly the same as one parent’s genes. Option B is correct.

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Answer:

No it will not (false)

Explanation:

I say this because if anything the ice will sink and melt from a solid to a liquid and that will lead to i guess more water for the aquatic life. (THIS IS A THEORY SHAWTY)

Answer:

47.43 m/s

Explanation:

Given that,

Final speed of a plane, v = 0

Distance, d = 180 m

Acceleration of the plane, a = -6.25 m/s² (deceleration )

We need to find the plane's velocity. Let it was u. So, using the third equation of kinematics as :

[tex]v^2-u^2=2ad\\\\u^2=0^2-2\times (-6.25)\times 180\\\\u=\sqrt{2250} \\\\u=15\sqrt{10}\ m/s\\ \\\text{or}\\\\u=47.43\ m/s[/tex]

So, the plane's velocity when it first touched the landing strip is 47.43 m/s.

d =200 m

Hi there !

Velocity formula

v = d/t => d = v×t

d = distance

t = time

d = 20m/s×10s = 200 m

Good luck !

Answer: B) weight

Explanation: Your mass does not change on the moon

Answer:

Atoms

Explanation:

That's what everything is made up of.

Answer:

h = 20.36[m]

Explanation:

To solve this problem we must calculate the perimeter (length of a circumference) of the circumference, which is denoted by the following equation:

L = 2*π*r

where:

r = radius = 0.9[m]

π = 3.1416

L = 2*(3.1416)*(0.9)

L = 5.654[m]

Now we know that the pulley or circumference had to rotate 3.6 times to get the water out of the well. In this way the depth of the well can be calculated by means of the following equation:

h = 3.6*L

h = 3.6*5.654

h = 20.36[m]

Answer:

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question

density = 0.17 g/cm³

1 mL = 1 cm³

12 mL = 12 cm³

So we have

mass = 0.17 × 12

We have the final answer as

Hope this helps you