The velocity of an object can be represented by a (n)__________ .
The length of the arrow indicates the ____________ . The arrow points
in the direction of the object’s _________.

Final answer:

(A) Doubling the mass of an object would double the gravitational force between it and Earth because the gravitational force is directly proportional to the product of the masses involved.

Explanation:

To answer the question: An object with a mass of 5.0 kg is accelerating toward the surface of Earth at a rate of 9.8 m/s², the change that would double the gravitational force acting between the object and Earth is doubling the mass of the object.

Newton's Universal Law of Gravitation states that the gravitational force between two masses is inversely proportional to the square of the distance between their centers and directly proportional to the product of the two masses. So, by doubling the mass of the object, you would directly double the gravitational force, as per the equation F = G * (m₁*m₂) / r², where r is the distance, m₁ and m₂ are the masses, and G is the gravitational constant.

Options B, C, and D do not result in doubling the gravitational force. Doubling the height above the surface would decrease the force, as gravitational force is inversely proportional to the square of the distance. Bringing the object to a complete stop has no effect on the gravitational force.

Reducing the acceleration rate to 4.9 m/s² would suggest that some other force is acting on the object, as the acceleration due to gravity is roughly 9.8 m/s² near the surface of Earth.

Answer:

A scientific experiment is performed to test the hypothesis which is the predicted idea about the natural phenomenon based on the previous research.

The experimental design must contain three types of variables: the variable which can be manipulated  (independent variable). the variable which is to be tested (dependent variable) and the variable which is kept constant throughout the experiment (constant variable).

The experimental sample is divided into two groups: the experimental group which includes the factor to be studied and the control group which lack the factor to be studied.

In the given question,

1. Hypothesis:  liquid spurt when falls form a height.

2. Independent Variable:  Height of hole which gets changed

3. Dependent Variable:  Range of squirt which is to be tested

4. Constant (at least one):the volume of filled liquid is kept constant

5. Control: 4 identical cartons which are punched with a hole of the same size.

6. A number of groups:  two (control and experimental)

7. Number of trials per group: four

Answer:

1) All the alpha particles must have deviated at some angle from their initial path.

2) None of the alpha particle will go out undeviating

Explanation:

In Rutherford's experiment he bombarded alpha particles on the nucleus of gold atom and then he observed that most of the alpha particles moves out undeviating while few of them shows small deflection.

But the most shocking part of experiment was that he saw that one out of 10,000 alpha particles are such which retrace their initial path i.e. those alpha particles are deviated nearly 180 degree angle.

Now these all observations will concluded as

1. Most of the part of atom is vacant and hence atom is not made up of positively charged.

2. Electrons revolves around the nucleus in circular orbits

3. The positive charge of the nucleus is concentrated at the nucleus of of atom which is a very small and dense volume of atom.

So these results are totally opposite of plum pudding model because as per plum pudding model the atom is a positively charged sphere and electrons are randomly placed in it.

If this model is assumed to be correct then in that case the observations must be like following

1) All the alpha particles must have deviated at some angle from their initial path.

2) None of the alpha particle will go out undeviating

Answer:

d is the correct answer.

Explanation:

D) Liquid to solid and liquid to gas.

Upon analyzing the results of an experiment, you can support the hypothesis, reject the hypothesis, postulate new queries, or identify errors.

Once an experiment has been conducted and the results analyzed, there are four potential responses when interpreting the data:

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Answer:

phototropism

I hope this helps

The kinetic energy of the car when it reaches the bottom of the hill is about A. 0.466 J

[tex]\texttt{ }[/tex]

Let's recall Kinetic Energy Formula as follows:

[tex]\large {\boxed{Ek = \frac{1}{2}mv^2} }[/tex]

Ek = Kinetic Energy ( Joule )

m = mass of the object ( kg )

v = speed of the object ( m/s )

Let us now tackle the problem !

[tex]\texttt{ }[/tex]

Given:

mass of the car = m = 0.05 kg

initial speed of toy car = u = 0 m/s

initial height position of the car = h₁ = 0.95 m

final height position of the car = h₂ = 0 m

gravitational acceleration = g = 9.81 m/s²

Asked:

final kinetic energy of the car = Ek₂ = ?

Solution:

We will use Conservation of Energy to solve this problem:

[tex]Ep_1 + Ek_1 = Ep_2 + Ek_2[/tex]

[tex]mgh_1 + \frac{1}{2} m u^2 = mgh_2 + Ek_2[/tex]

[tex]mgh_1 + \frac{1}{2} m (0)^2 = mg(0) + Ek_2[/tex]

[tex]mgh_1 = Ek_2[/tex]

[tex]Ek_2 = 0.05 \times 9.81 \times 0.95[/tex]

[tex]Ek_2 \approx 0.466 \texttt{ J}[/tex]

[tex]\texttt{ }[/tex]

[tex]\texttt{ }[/tex]

Grade: High School

Subject: Physics

Chapter: Energy

Answer:

it would be an atom!!!

Explanation:

Answer:

Your answer would be a penny.

Explanation:

Every other answer would have fallen slower because:

A large poster would work as a parachute (which falls slowly.)

A shoe box is empty and big, therefore would fall slowly due to the hollowness and size.

A cell phone is flat and wide (relatively) and would fall slower than the penny EVEN THOUGH it has more weight.

The penny would fall quickly, due to aerodynamics and size. It is small, has weight to it, and other contributing factors prove my point. :)

Final answer:

Adding soap to water decreases its surface tension due to the interaction between soap molecules and water, resulting in fewer drops of water fitting on a penny.

Explanation:

Yes, adding soap to water will affect how many drops of water will fit on a penny. This is because soap reduces the surface tension of water. Normally, water has a high surface tension due to the polar nature of water molecules, which allows it to pile up in drops. However, when soap is added, the soap molecules disrupt the water's cohesive forces by inserting themselves between water molecules.

The ionic-salt end of the soap molecule dissolves in water, while the non-polar hydrocarbon tail sticks out, reducing the attraction between water molecules. This results in lower surface tension, causing the water to spread out more thinly and not pile up as effectively on the surface of a penny. Therefore, you would expect fewer drops of water to fit on a penny after soap has been added to the water.

In adverse weather conditions, drivers should turn on headlights, slow down, and increase their following distance to enhance road safety.

During adverse weather conditions such as rain or fog, drivers should indeed respond by adapting their behavior to maintain safety. The first action to be taken is to turn on the car's headlights. This helps other vehicles and pedestrians on the road see you. Secondly, one should slow down. Reduced visibility means that hazards may not be perceived until they are closer, and the wet road conditions may increase stopping distance. Finally, the driver should increase the following distance. This gives you more time to react if the car in front stops suddenly. These three actions can greatly enhance road safety in adverse weather conditions.

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Answer:

1 - 340/3:

    113.3333333 seconds.