Science question!! Please help

Answer:

1. 100N 2. 50N 3. 50N

Explanation:

The spring scale reading that shows how much force she must exert is 1. 100N 2. 50N 3. 50N.

A simple and affordable way to determine mass is by using spring balances. The mass is suspended from the end of the spring, and the spring's deflection as a result of the mass's downward gravitational pull is measured in relation to a scale.

The word "force" has a specific meaning in science. At this level, calling a force a push or a pull is entirely appropriate. A force is not something an object "has in it" or that it "contains."

One thing experiences a force from another. There are both living things and non-living objects in the concept of a force.

Therefore, her required force is indicated by the spring scale readings of 1. 100N, 2. 50N, and 3. 50N.

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Answer:

Visible light

Explanation:

Answer:

C visible light

Explanation:

Answer:

C.  Series circuits are simpler than parallel circuits.

Explanation:

In series circuit, all the components are connected in single path of current flow. If one part of the circuit breaks, the whole thing would break and none of the other parts would work. The voltage is not the same everywhere. It is different across each component. In series circuit, net resistance is more as resistance of all the components connected in series are added up. So, the only advantage of a series circuit is that is simpler than the parallel circuits.

Answer:

C

Explanation:

Answer:

Producing 300 L of ethanol from potatoes

Explanation:

From the diagram, one liter of ethanol production from sugar cane requires 2000 liters of water. Hence, in order to produce 100 L of ethanol from sugar cane, 2000 x 100 = 200,000 L of water.

1000 liters of water is needed to produce 1 liter of ethanol from sugar beet. Hence, 200 x 1000 = 200,000 L of water will be needed to produce 200 liters of ethanol.

1000 liters of water is also required to produce 1 liter of ethanol from potatoes, hence, 300 x 1000 = 300,000 L of water would be required to produce 300 L of ethanol from the same material

About 500 liters of water is required to produce 1 liter of ethanol from corn, hence, 400 x 500 = 200,000 L of water would be needed to produce 400 L of ethanol from corn.

In conclusion, producing 300 L of ethanol from potatoes would require using the most water among all the options.

Answer:

2.5 hours is the answer according to me

Answer:

4.2

Explanation:

Answer:

Difference

Explanation:

The electricity conduction happens when there is a flow of current. The flow of current from one point to another can only occur if there is a potential difference.

If there is not potential difference between two points the current will not flow and thus electricity conduction will also be not possible. The current in the circuit will flow from higher potential point to lower potential point.

The phases where surfer’s most likely benefit include D. 1st Quarter and 3rd Quarter.

Surfers will benefit include during the 1st Quarter and 3rd Quarter because there's tidal change. Tidal change is when coastal areas experience two low and high tides.

The benefit of surfing during this period is that it helps jack the waves. Waves transmit energy and this is important to surfers.

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The power of the light bulb is 15 watts.

Power in physics is defined as the rate of energy per unit time or in other words the work done by any electrical appliance per unit time. Power is expressed as -

P = E/T where E is Energy and T is the time period.

Given that the light bulb emits 30 J light energy in 2 seconds.

We have E = 30J and T = 2 seconds.

Therefore power(P) = Energy(E) / Time(T)

∴  P = 30 / 2 = 15 watts

Thus the power of the light bulb is 15 watts.

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Answer:

The efficiency of the machine is 40 %.

Explanation:

We have,

Output work by the machine is 4 joules and the input work is 10 joules.

It is required to find the efficiency of a machine. The efficiency of a machine is given by the ratio of output work to the input work. It is given as :

[tex]\eta=\dfrac{4}{10}\times 100\\\\\eta=40\%[/tex]

So, the efficiency of the machine is 40 %.

Answer:

acceleration

Explanation:

From the question: "FORCE... divided by the MASS..." is translated to a math equation as "F / m", where "F" is the force and "m" is the mass.  

Now, the second Newton's law says "F = m . a ", where a is acceleration.

If you move m to the left side, clearly you have "F / m", and "a" is alone to the right. Math equation:

a = F / m

acceleration = force / mass

Answer:

stabilize

I think this should be the answer...

Answer stabilize

Explanation: hope it’s right

Answer: Static electricity is an excess of neutrons-FALSE

Explanation:

A P E X

Answer:

I don't think so because we can't breathe in space

Explanation:

Answer:

No

Explanation:

There is no oxygen in space, so astronauts must bring tanks of oxygen

Answer:

A is the correct answer

Explanation:

mark brainliest please

Answer:

I'm glad you asked!

Explanation:

1.Venus is the hottest planet in the solar system.

2.Opportunity explored Mars' surface.

3.Earth is the only planet in the solar system known to have plate Tectonics.

4.Mercury is one of the four planets closest to the Sun.

5.Mercury is the smallest of all planets in the solar system.

6.Messenger is a space aircraft that orbits and studies Mars.

7.Venus has the largest volcano in the solar system.

Answer:

12.0 m/s²

Explanation:

Newton's second law:

F = ma

Solving for acceleration:

a = F/m

If force is doubled and mass is tripled:

a' = (2F)/(3m)

a' = ⅔ (F/m)

a' = ⅔ (18.0 m/s²)

a' = 12.0 m/s²

The new value of acceleration of object is 12 m/s².

Given data:

The magnitude of acceleration of object is, [tex]a =18 \;\rm m/s^{2}[/tex].

Let F be initial net force and m be the initial mass. Then as per the problem, the new values of each are,

F' = 2F

m' = 3m

Apply the Newton's Second law, which says that the product of mass and acceleration of object given net force. Then,

F = ma

F = m(18)

F/m = 18 .................................................(1)

Now, for new value of net force,

F' = m'a'

2F = (3m) a'

2F/3m = a'

a' =2/3× (18)                                                   (From equation 1)

a' = 12 m/s²

Thus, we can conclude that the new value of acceleration of object is 12 m/s².

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Answer:

Visible Spectrum is the type of electromagnetic wave with a wave length between 700 and 400 billionths of a meter.

Answer: B. 44.64 g

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

Mass of reactants = mass of iron + mass of oxygen = mass of iron + 34.7 g

Mass of product = mass of iron oxide = 79.34 g

As Mass of reactants = Mass of product

mass of iron + 34.7 g = 79.34 g

mass of iron = 44.64 g

Thus 44.64 g of iron was used in the reaction

Answer:

Blood

Explanation:

Homogenous means the same type and a box with toys, spaghetti and meatballs, and trail mix all have variety.

Answer:

B is the correct answer

Answer:

an attractive force

a noncontact force

a vertical force

Explanation:

Gravitational force is a NON-CONTACT FORCE. Gravitational force acts on all bodies on the earth that have mass. The force which is exerted through weight acts on the center of gravity of the body. The force is directed towards the center of the earth. The weight of a body is the gravitational force exerted by the earth on the body.

A,C,F.

Explanation: Got it correct.

Answer:

The water above receives energy as it falls down the short waterfall. This energy was stored as potential energy in the gravitational field of the Earth and came out of storage as the water dropped. This energy which came out of the gravitational field ended up being expressed as the kinetic energy of the water. That is, the water gains kinetic energy as it drops. An ounce of water is going faster when it hits the bottom of the waterfall than it was when it went over the top of the waterfall

Explanation:

The drops of water contain the most gravitational potential energy at the top before they start falling.

At the top of the waterfall

At the top of the waterfall, the water drops have the most gravitational potential energy before they start falling as the water at the peak of the waterfall is higher in the Earth's gravitational field and has gravitational potential energy. The potential energy is converted to kinetic energy when it falls. As a result, energy is not created; it was always there, stored as potential energy.

Potential energy is energy that is stored and is determined by the relative positions of various pieces of a system. Kinetic energy is the energy that an item or particle has as a result of its movement.

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Answer:

It is Potential and corresponding to

90

J

.

Explanation:

Potential Energy is energy stored in the system and ready (potentially) to be changed into, say, Kinetic Energy through movement.

The general expression for Gravitational Potential Energy is:

U=mgh

where:

mg is the weight; h is the height relative to a certain reference level (the ground in this case) choosen to have zero Potential Energy.

With your data we get:

U=3⋅30=90J

Explanation:

As the magnification is positive , thus the image formed is inverted and real

Answer:a

Explanation:

Answer: ( A )

Explanation: the answer is a

Answer:

option B is right

...............

Answer: A C B

Explanation:

If you look closely the water levels show which is bigger fun fact.