75 POINTS!!

In the experiment described in the scenario, which group represents the control group?

A.) Plant D
B.) Plant B
C.) Plant C
D.) Plant A

Answer:

study of everything that helps to improve the home and the family

Explanation:

Answer:

➢ Home economics, or family and consumer sciences, is a subject concerning human development, personal and family finance, housing and interior design, food science and preparation, nutrition and wellness, textiles and apparel, and consumer issues.

Explanation:

I hope it will help you....

#carryonleraning

Hi there!

Recall the equation for momentum:
[tex]\large\boxed{p = mv}[/tex]

p = linear momentum (kgm/s)
m = mass (kg)

v = velocity (m/s)

We can calculate each object's momentum and compare.

Cement truck:
[tex]p = 20000 \cdot 5 = 100000kg\frac{m}{s}[/tex]

Race car:
[tex]p = 1000 \cdot 90 = 90000 kg\frac{m}{s}}[/tex]

Since 100,000 > 90,000, the cement truck has the greater momentum.

Answer:

Aluminum can be made into foil because aluminum has high ductile.

Explanation:

Answer:

Because it is highly ductile

Answer:

When you add ice to hot water, the ice melts and the hot water cools

Explanation:

When ice is poured in a hot cup of water, the ice melts and then mixes with the hot water cooling and lowering the temperature. The weight increases when ice added. process occurring: ice melting to liquid.

Answer:

The cars would both move in the direction with the greatest momentum.  We know the truck would have the greatest momentum due to having the greatest mass. Plus, factors which affects momentum are mass and velocity.    

Thus, the car would move forward towards the direction of momentum of the truck. Both will continue to move at the same velocity.

E.g. truck hits the back of a stationary car, both will move forward, to the right & travelling at the same speed, but lower than the initial velocity of the truck. Now the total the total momentum before the collision is the same as the total momentum after the collision; as a result, momentum has been conserved.

Hope this helps!

Answer: READ WHOLE THING ***

A ramp is an example of an inclined plane. Think back to the example of the ramp and the moving truck. The ramp reduced the amount of force needed to lift the box by moving it over a greater distance. The longer an inclined plane, the less force is required to move an object upward.

Hope this helps :)

True, a lower ramp will be longer, allowing for less force to be used, but makes an object travel a greater distance.

Therefore , a lower ramp will be longer, allowing for less force to be used, but makes an object travel a greater distance.

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Answer:7.625m/s2

Explanation: M=1525

N=200

F=M*a

200=1525*a

a=1525/200

a=7.625m/s2

Explanation:

K=mgh\\1300=(7)(9.8)h\\h=19\ mK=mgh

1300=(7)(9.8)h

h=19 m

Answer:

it increases

Explanation:

equal to opposite force so it would return the amount applied on it

If an object experiences a certain net force that causes a certain acceleration. If the net force on the object is tripled , then the acceleration of the object would become tripled as well assuming the mass of the object is constant.

Newton's Second Law states that The resultant force acting on an object is proportional to the rate of change of momentum.

As given in the problem if an object experiences a certain net force that causes a certain acceleration. If the net force on the object is

tripled,

If a specific net force acting on an item results in a specific acceleration. Assuming the mass of the item remains constant if the net force acting on it is tripled, the acceleration of the object would also be tripled.

Thus, the acceleration of the object would get tripled.

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Answer:

6.817 x 10^-4

Explanation:

You first need to put the decimal between the ones and tenths (6.8), then you count back to the original decimal point. If you are counting to the left then its going to be a negative exponent but if you count towards the right, it'll be a positive exponent. So from 6.817 to 0.0006817, it is 4 places back. Thats how you get the answer. Hope this helps a bit

Answer:

6.817 x 10^-4

Explanation:

First move the decimal between the ones and tenths (6.8), then count back to the original decimal point if you are counting to the left then its going to be a negative exponent but if you count towards the right it'll be a positive exponent. From 6.817 to 0.0006817, it is 4 places back, nd this is how you get the answer.

Answer:110N

Explanation:

ma=f in/ f out (formula)

Input: 20.0N

Ma:5.5

Output:?

^ given information

Plug the numbers into the equation ~
5.5= 20N/?
5.5x20=110N

If a certain lever has a mechanical advantage of 5.5, then the leaver would be able to lift a load of 110 Newtons  with an input force of 20.0 N

Mechanical advantage is defined as a measure of the ratio of output force to input force in a system, It is used to analyze the forces in simple machines like levers and pulleys.

Mechanical advantage = output force(load) /input force (effort)

As given in the problem a certain lever has a mechanical advantage of 5.5, then we have to find out how heavy of a load could the lever lift with an input force of 20.0 N,

Mechanical advantage = output force(load) /input force (effort)

5.5 = load / 20.0 Newtons

load = 5.5 × 20

       = 110 Newtons

Thus, the leaver would be able to lift a load of 110 Newtons  with an input force of 20.0 N

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Answer:

f = 22.5 Hz

Explanation:

speed of wave = v

frequency = f

wave length = l

v = lf → f = v/l → f = 45/2 → f = 22.5 Hz

Inertia is the tendency of an object to stay in the current state. Hence, the stationary car has a tendency to continue in the state of rest. Quick starts up will make it move backward or if stop quickly while moving, it goes forward.

According to Newton's first law of motion, an objects tends to continue in its state of motion or rest until an external force acting on it. This tendency of the objects is called inertia.

The impacts of inertia can be well explained based on on real life examples. If we might had the experience of moving to front in a vehicle which suddenly breakes. It is the tendency of the vehicle to stay in motion.

Similarly the car when started from rest initially tends to stay at rest and that's why we feel it moves back ward. Similarly the car will move forward when it is suddenly stops.

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Answer:

I choose red sea, because while diving, it will be more easier if the upward force is less(upthrust). since the upthrust increase with increase with density, it will be much difficult to dive in Dead sea than red sea.

1. since red sea has less density, it would have the minimum upthrust, which results in less resistance while diving.

it is also because, the pressure inside the liquid at same depth will be less in red sea, due to its density.

PLEASE MARK BRAINLIEST.

Answer:

I need help on this to omg

Explanation:

Hi there!

If a +q charge is placed in the center of a hollow conductor, a charge of -q will be induced in the interior of the shell.

Thus, with the conservation of charge:

[tex]q_{outer} + q_{inner} = q_{total}\\\\q_{outer} - q = 9q[/tex]

Solve for the outer charge:

[tex]q_{outer} = q + 9q = 10q[/tex]

Therefore, the INTERIOR has charge -q and EXTERIOR has charge 10q.

Answer:

The moon is turning red because being that the moon doesn't have any light of it's own, the Earth moves between the Sun and the moon, disrupting the light supply for the Moon.

Answer: If all forces acting on a car are zero, than the cars speed is zero since there are no forces to push or pull the car :)

Explanation:

Answer:

the answer is capacity

Explanation:

Explanation:

electric kettle works so quickly is by using a relatively large electric current.

The amount of heat produced is proportional to the current squared,

so bigger currents produce much more

heat—and heat things much more

quickly—than smaller ones.

Water in an electric kettle boils much faster when compared to normal kettle mainly because of two reasons :-

(•) In normal kettle, heat is supplied directly onto the kettle's base. As it is cold in nature, it takes time for the kettle base to be heated and then only the heat passes through water.

On the other hand, in electric kettle, the electric current wave passes directly through the water, hence it takes less time to heat the water.

(•) Water is a good absorber of electric current, but is a poor absorber of heat. Consider if it takes 2 minutes for electric to pass through water, then it will take 9 minutes for the heat to pass through water.

It is due to these major reasons to why water boils faster in electric kettle than in normal kettle.

--------------------★---------------

If you have any doubts regarding the answer, feel free to ask it in comments !

Hope this answer's your query ...

Answer:

[tex]\huge\boxed{\sf Circumstellar\ discs }[/tex]

Explanation:

Astronomers discovered matter made up of gas, dust or asteroids etc. around nearby stars. This matter is called circumstellar disc (due to it being ring-shaped). These circumstellar discs are materials out of which planets form.

[tex]\rule[225]{225}{2}[/tex]

Hope this helped!

The force of the car's engine exerts is 6000 N.

To find the force, the given values are,

acceleration, a = 3 m/s².

mass = 3000 kg

Acceleration, a = Force F/ Mass m

From which we get the formula

Force F = Mass m × Acceleration a

Where, mass is kg and acceleration is m/s².

where kg is kilogram-meter per second square or Newton.

Substituting the Equation in:

F = ma

  = 3000kg x 2m/s²

  = 6000kgm/s²

F = 6000 N.

So, the Force of the car engine exerted is 6000 N.

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Given :-

To Find :-

Solution :-

For figure refer to attachment .

So the block will move if the angle of the inclined plane is greater than the angle of repose . We can find it as ,

[tex]\longrightarrow \theta_{repose}= tan^{-1}(\mu_s)[/tex]

Substitute ,

[tex] \longrightarrow \theta_{repose}= tan^{-1}( 0.2)[/tex]

Solve ,

[tex]\longrightarrow\underline{\underline{\theta_{repose}= 16.6^o }}[/tex]

Hence ,

[tex]\longrightarrow\theta_{plane}>\theta_{repose}[/tex]

Hence the block will slide down .

Now assuming that block is released from the reset , it's initial velocity will be 0m/s .

And the net force will be ,

[tex]\longrightarrow F_n = mgsin53^o - \mu_k N [/tex]

Substitute, N = mgcos53⁰ ( see attachment)

[tex] \longrightarrow ma_n = mgsin53^o - \mu_k mgcos53^o [/tex]

Take m as common,

[tex] \longrightarrow\cancel{m }(a_n) = \cancel{m}( gsin53^o - \mu gcos53^o)[/tex]

Simplify ,

[tex] \longrightarrow a_n = gsin53^o - \mu_k g cos53^o[/tex]

Substitute the values of sin , cos and g ,

[tex] \longrightarrow a_n = 10( 0.79 - 0.2 (0.6)) [/tex]

Simplify ,

[tex] \longrightarrow a_n = 10 ( 0.79 - 0.12 ) \\\\ \longrightarrow a_n = 10 (0.67)\\\\ \longrightarrow \underline{\underline{a_n = 6.7 m/s^2}}[/tex]

Now using the Third equation of motion namely,

[tex] \longrightarrow2as = v^2-u^2[/tex]

Substituting the respective values,

[tex] \longrightarrow2(6.7)(5) = v^2-(0)^2 [/tex]

Simplify and solve for v ,

[tex] \longrightarrow v^2 = 67 m/s\\\\\longrightarrow v =\sqrt{67} m/s \\\\\longrightarrow\underline{\underline{ v = 8.18 m/s }} [/tex]

Hence the velocity after covering 5m is 8.18 m/s .

Answer:

38

Explanation:

76 divided by 2 =38

Answer:

mind-bogglingly hot

Explanation:

If a sunspot were pointed right at Mercury in this way, the planet would become even more mind-bogglingly hot. Sunspots look dark in our visual spectrum, so we might suspect that they are colder (or at least less hot) than the rest of the Sun; but in fact, they are hotter.