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Answer:

Experimental investigations involve a process in which a "fair test" is designed and variables are actively manipulated, controlled, and measured in an effort to gather evidence to support or refute a causal relationship. Experimental investigations have a control group which does not receive any treatment.

Answer: the answer is controll group

Explanation: hopes this help :)

Answer:

r =  255.68 m

Explanation:

When a body moves in a circular path, an acceleration, due to constant change in its direction, is developed, known as centripetal acceleration. The centripetal acceleration acts towards the center of the circular path. The formula to calculate the centripetal acceleration is given as follows:

ac = v²/r

where,

ac = centripetal acceleration = 22 m/s²

v = tangential speed = 75 m/s

r = radius of curve = ?

Therefore,

22 m/s² = (75 m/s)²/r

r = (75 m/s)²/(22 m/s²)

r =  255.68 m

Answer:

You know the distance from mean position.

Answer:

the equilibrium of one wave to the crest of the same wave.

Explanation:

The amplitude of a wave corresponds to the distance between the equilibrium position of the wave and the crest of the same wave (or the distance between the equilibrium position and the through of the same wave), therefore we see that this definition corresponds to option C,

the equilibrium of one wave to the crest of the same wave.

Answer:

5 km/hr due south

Explanation:

We need to subtract the two velocities due to the fact that they are in opposite directions (one due south and the other one due north). Then, for an observer located on earth, the goose will be flying at :

20 km/hr - 15 km/hr = 5 km/hr

Answer:

Displacement = 5 meters North

Distance = 15 meters

Explanation

If he walks 10 meters North than his displacement would be 10 meters North. But since he walked 5 meters South it changes his displacement to 5 meters North because that is how far he is away from his starting point.

Hope this helps

Answer:

wouldn't it be 17km?

Explanation:

Since its 10km and 7km it would make 17km in total. sorry if this didnt help i suck at this stuff :/

Answer:

The horizontal range is maximum when θ is equal to 45°

Explanation:

Projectile Motion

It's known as the type of motion that experiences an object that is projected near the Earth's surface and moves along a curved path exclusively under the action of gravity.

Being vo the initial speed of the object, θ the initial launch angle, and [tex]g=9.8\ m/s^2[/tex] the acceleration of gravity, then the maximum horizontal distance traveled by the object (also called Range) is:

[tex]\displaystyle d={\frac {v_o^{2}\sin(2\theta )}{g}}[/tex]

Since the sine of an angle is bounded between -1 and 1, the maximum range will occur when the sine is 1:

[tex]\sin(2\theta)=1[/tex]

The only angle between 0° and 360° whose sine is 1 is 90°, thus:

[tex]2\theta=90^\circ[/tex]

Solving:

[tex]\theta=45^\circ[/tex]

The horizontal range is maximum when θ is equal to 45°

The horizontal range is maximum for the value of angle equivalent to [tex]45^{\circ}[/tex].

Given data:

The player kicks the ball with an angle [tex]\theta[/tex] with the horizontal.

The given problem is based on the concept and fundamentals of projectile motion. In a projectile motion, the horizontal range is the horizontal distance covered by an object during its trajectory.

The mathematical expression for the horizontal range is given as,

[tex]R = \dfrac{u^{2}sin2 \theta}{g}[/tex]

Here,

R is the horizontal range.

u is the initial speed.

And g is the gravitational acceleration.

Clearly, if we need maximum horizontal range, then we need to have the maximum value of sine. So if,

[tex]\theta =45^{\circ}[/tex]

[tex]sin2 \theta=sin90[/tex] = 1

So the maximum range is,

[tex]R = \dfrac{u^{2}sin(2 \times 45^{\circ})}{g}\\\\R = \dfrac{u^{2} \times sin 90^{\circ}}{g}\\\\R = \dfrac{u^{2}}{g}[/tex]

Thus, we can conclude that the horizontal range is maximum for the value of angle equivalent to [tex]45^{\circ}[/tex].

Learn more about the projectile motion here:

https://brainly.com/question/13358421

It took a squirrel 0.50 s to run 5.0 m leftward when it reached the tree while maintaining a constant acceleration. The squirrel was running 15 m/s leftward when it reached the tree.

What was the squirrel's initial velocity?

Answer: -5

The initial velocity of the squirrel is 5m/s. Initial velocity is a vector quantity.

Acceleration is the rate of change of the velocity of an object with respect to the time. Acceleration is the vector quantity.

The initial velocity of the object can be calculated by the following equation:

s = 1/2 (u + v) t

5.0 = 1/2 (u + 15) × 0.50

10 = (u + 15) × 0.50

10 / 0.50 = (u + 15)

20 = (u + 15)

u = 20 - 15

u = 5m/s

Thus, the squirrel's initial velocity before getting startled is 5 meters per second.

Learn more about Acceleration here:

https://brainly.com/question/12550364

#SPJ2

We have that from the options, the  force require to move the table will be the Reaction force.i.e the force that will get a reaction out of the table i.e is Motion

The reaction force on the box

Correct  Option is C

From the question we are told

Lien is pushing a box across a table. She used a force of 100 N to get the box moving

Generally The Force Requird to Move a table is greater than the contiunes force applied to it to en sure it contines in Motion.

Having said that Newtons Third law states for every action there most be an equal and opposite reaction

Therefore

From The options the  force require to move the table will be the Reaction for.that is the force that will get a reaction out of the table i.e is Motion

Correct  Option is C

For more information on this visit

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Answer:

8.33

Explanation:

av= distance travelled /time taken

Answer:

Explanation:

i didnt got what you had said about qn 1 and 2

qn 10 :pic given

qn 11;F = m * a

The apple's acceleration is not influenced by the acceleration due to gravity for this question.  In real life it most certainly is influenced by gravity.

F = m * a

F = 10 Newtons.

a = 6 m/s^2

m = 10/6 = 1.66 kg.

Answer:

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\[/tex]

From the question

mass = 250 g

volume = 100 cm³

So we have

[tex]density = \frac{250}{100} = \frac{5}{2} \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

Positive

Explanation:

Answer:

positive

Explanation:

i'm reallt sorry if I'm wrong

Answer:

Ep = 0.6095 [J]

Explanation:

As defined in the problem statement, potential energy is defined as the product of mass by gravity by height. But first we must convert all the values given to measures of the international system (SI)

g = gravity = 10 [m/s^2]

h = elevation = 40 [ft] = 12.19 [m]

m = mass = 5 [g] = 0.005 [kg]

Ep = potential energy [J]

Ep = 0.005*10*12.19 = 0.6095 [J]

Answer:

32

Explanation:

Answer:

There's nothing quite like placing random objects through some computational fluid dynamics software. As we can see, the forehead of the cow experiences a zone of high pressure, since a lot of the air is deflected from the front of the nose and straight to the head.

Explanation:

Answer:

180

Explanation:

i think

Answer:

workdone = force x displacement

force = work done /displacement

= 2000 / 50

= 40 N .

Answer:

I) Name of State of Matter: Solid

a) Property of this State of Matter: Definite shape and volume.

b) Property of this State of Matter: Generally have a higher density.

c) Property of this State of Matter: Diffusion of one solid into another solid is characteristically slow.

II) Name of State of Matter: Liquid

a) Property of this State of Matter: Definite volume but no definite shape.

b) Property of this State of Matter: Vaguely compressible; Barely compressible.

c) Property of this State of Matter: Flow from a higher level to a lower level.

III) Name of State of Matter: Gas

a) Property of this State of Matter: Easily compressible.

b) Property of this State of Matter: Expand to fill containers.

c) Property of this State of Matter: They are able to occupy far more space than liquids or solids.

Answer:

The  theree state of  matter is

1.solid.

2.liquid.

3.gas.

Explanation:

Answer:

1. Solid, liquid, gas, plasma

3. latent heat of vaporization

4. melting

6. heat

7. amount of heat transferred when 1g of a substance melts or freezes

Answer:

1. Solid, liquid, gas, plasma

2.  In a solid and liquid, the particles are close together. In a solid, the particles are packed close together and are held in a fixed position. ... In liquids, particles are usually almost as close to each other as in solids.

3. latent heat of vaporization

4. melting

5. As the temperature falls, the particles slow down. If a liquid is cooled sufficiently, it forms a solid.

6. heat

7. amount of heat transferred when 1g of a substance melts or freezes

Explanation:

Textbook online

You don't need to calculate anything.

You said "0.05 Ampere".

"Ampere" means "coulomb per second".

Answer:

The doctors could see if her cells are getting the molecules they need from food and air

Explanation:

The doctors could see if her cells are getting the molecules they need from food and air. Doing so allows the doctors a general overview of how well her body's biological systems are performing since the basic necessities of the human system are food and oxygen. Therefore if the body is receiving both food and oxygen properly and distributing it properly and efficiently as well without any problems then the most likely outcome is that she is healthy enough to perform her tasks in the submarine under more pressure.

Answer:

The doctors could see if her cells are getting the molecules they need from food and air

Explanation:

There are four natural states of matter: Solids, liquids, gases and plasma.

Answer:

There are 4 states of matter. Solid, liquid, gas, and plasma.

Explanation:

Plasma isn't that important, the main ones are solid, liquid, and gas.

Answer:

False

Explanation:

I took the test  and true was incorrect so the answer is false

hope this helps

Answer:

False

Explanation:

False. A high gear ratio = less speed = more force

Answer:

latent heat, also called the heat of vaporization, is the amount of energy necessary to change a liquid to a vapour at constant temperature and pressure. The energy required to melt a solid to a liquid is called the heat of fusion, and the heat of sublimation is the energy

Explanation:

Answer:

no

Explanation:

because there is nothing holding you back

Answer:

C

Explanation:

the periodic table of elements only consist of elements and all of the elements found in the world

Answer:

drastic assumption that the car moves along the path at the same speed,

hese failures, it would be necessary to take the time of each type of trajectory, accelerated, constant and decelerated, this method is not easy since it implies knowing the distance in each type of movement,

Explanation:

In this exercise Alfredo makes a drastic assumption that the car moves along the path at the same speed, in reality the car when leaving the first traffic light accelerates until it reaches a speed, then remains constant and decelerates to be able to stop at the second traffic light.

To overcome these failures, it would be necessary to take the time of each type of trajectory, accelerated, constant and decelerated, this method is not easy since it implies knowing the distance in each type of movement, another method would be that the two traffic lights were in green so that the vehicle can run with constant speed throughout the trajectory