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Answer:

4.Given:

m=1000kg

a=(3m/s)^2

F=m×a

=1000×3

=3000N

5.Given:

m=50kg

a=(5m/s)^2

F=m×a

=50×5

=250N

6. Given

F=250N

a=(5m/s)^2

m=?

F=m×a

250N=m×(5m/s)^2

m×(5m/s)^2=250N

m=250N÷(5m/s)^2

m=50kg

1. Our solar system is the only place in the universe where gravity played a key part in the formation of planets.

2. Rocky planets are small, dense, and orbit relatively close to the sun, compared to the Jovian planets, which are large, less dense, and orbiting far from the sun.

3. _______

Answer:

The speed decreases and the frequency remains the same.

Explanation:

Had it for a castle learning assignment, guessed and got it correct.

The speed of a light ray decreases and its frequency remains the same when it passes from glass into water.

The speed of light, also known as the velocity of light, is a fundamental constant of nature and is one of the most well-known physical quantities. It is defined as the speed at which electromagnetic radiation (light) travels through a vacuum, which has a constant value of 299,792,458 meters per second (m/s).

This speed is considered to be the fastest that anything can travel in the universe, and it is a critical component in many physical and biological processes. The speed of light is used in a wide range of scientific and technological fields, including optics, electronics, astronomy, and quantum mechanics. It is considered to be a universal constant and does not change with time, distance, or the medium through which it travels.

Learn more about light ray, here:

https://brainly.com/question/13851007

#SPJ6

The free body diagram allows to find the results for the forces applied on the refrigerator are;

       a) Free-body diagram with applied force.

       b) Free-body diagram without applied force.

A free-body diagram is a diagram of the forces without the details of the body, these diagrams are important to clearly visualize the forces and the coordinate systems against which to take measurements.

In the attached we have a free-body diagrams for a refirerator, represented by the box where the forces are appreciated:

Newton's second law states that the net force is proportional to the mass times the acceleration of the body.

             ∑ F = ma

where F is the force, m the mass and the acceleration

          ∑ F = F - fr = 100 N

          a = 100 / m

In conclusion with the free body diagram we can find the results for the forces applied on the refrigerator are;

a) Free-body diagram with applied force.

b) Free-body diagram without applied force.

Learn more about the free-body diagram here:  brainly.com/question/16799228

Answer:

The correct answer is - Lemon juice hydrolyzes sugar and dissolves it faster and creates a solution.

Explanation:

When mixing lemon juice and sugar in water are mixed together, the lemon juice dissolves the sugar faster as it has citric acid that hydrolyzes sucrose molecules of sugar in glucose and fructose.

This mixing of all three lemon juice, water, and sugar form a solution. Here in this solution, water is solvent, and sugar and lemon juice are solutes. The quantity of all three determined the nature of the solution if it will be acidic or more diluted.

Answer:

They are both proportional to the product of their masses and inversely proportional to the square distance between the masses.

Answer:

Explanation:

As given, the student has three balloons and rubs two of them on a piece of wool. The rubbing of balloon on wool is the independent variable as it was done on two and not on the third as control.

Answer:

the acceleration of an object is directly pro to the net force acting on it and indirectingly proportional to its mass

Answer:

In the solar cells, the energy is obtained only during the day, when the Sun shines. .So, it increases the cost of using solar panels as the source of energy. So, the solar cell is not used to meet all our energy needs

hope this helps

have a good day :)

Explanation:

Answer:

In the solar cells, the energy is obtained only during the day, when the Sun shines. ... So, it increases the cost of using solar panels as the source of energy. So, the solar cell is not used to meet all our energy needs

Explanation:

n the solar cells, the solar panel convert solar energy into electricity, which is stored in storage battery. The storage battery give the direct current but all the appliances are working by the alternating current, so first of all direct current is converted into alternating current by any suitable appliances before it can be used to run various devices. So it increases the cost of using solar panels as the source of energy. 

Explanation:

The reading on the scale is

W = m(g + a)

= (77 kg)(9.8 m/s^2 + 2 m/s^2)

= 908.6 N

Answer:

B: 28m/s

Explanation:

Use the speed formula

Speed =distance / time

Answer:

[tex]\boxed {\boxed {\sf B. \ 28 \ m/s}}[/tex]

Explanation:

If we want to know how fast the cheetah is running, we need to calculate its speed. This is the rate at which an object moves and the formula is distance divided by time.

[tex]s=\frac{d}{t}[/tex]

The cheetah ran 112 meters in 4 seconds.

Substitute the values into the formula.

[tex]s=\frac{112 \ m}{ 4\ s}[/tex]

Divide.

[tex]s= 28 \ m/s[/tex]

The cheetah's speed is 28 meters per second and choice B is correct.

Answer:

hope you can understand the calculations

Answer:

there it is fella tried on ma own consciousness

Answer: Hello your question is incomplete, I was able to find the question online but I am unable to attach it due to plagiarism rules

answer : Lithium and Potassium

Explanation:

The elements that are in the unknown sample are : Lithium and Potassium

An Emission spectrum is used to determine the composition of a material and it is distinctively different for each element that us found on the period table

Answer:

B

Explanation:

Newton's first law of motion states that every object will continue in a state of rest or uniform motion in a straight line unless a resultant force acts on it

balanced force means resultant force is 0N

this means that the speed will not change as it uniform and the direction will not change because it will continue at the same speed in a statight line and direction

sorry man, I think it was late

hope this helps

Answer:

letter C. they are bad for the environment

Answer:

Calculations involving forces

The resultant force is the single force that has the same effect as two or more forces acting together.

Two forces in the same direction

Two forces that act in the same direction produce a resultant force that is larger than either individual force.

You can easily calculate the resultant force of two forces that act in a straight line in the same direction by adding their sizes together.

Example

Two forces, 3 N and 2 N, act to the right. Calculate the resultant force.

Two arrows, one above the other, both pointing to the right, one labelled 2 N and one labelled 3 N. Then an equals sign and then another arrow to the right labelled 5 N.

Two forces acting in the same direction

Resultant force F = 3 N + 2 N = 5 N to the right.

The resultant force is 5 N to the right.

Two forces in opposite directions

Two forces that act in opposite directions produce a resultant force that is smaller than either individual force.

To find the resultant force subtract the magnitude of the smaller force from the magnitude of the larger force.

The direction of the resultant force is in the same direction as the larger force.

Example

A force of 5 N acts to the right, and a force of 3 N act to the left.

Calculate the resultant force.

Two arrows, one above the other, one pointing to the left, labelled 2 N, the other pointing to the right labelled 3 N. Then an equals sign, with an arrow to the right labelled 1 N.

Two forces acting in opposite directions

Resultant force F

Resultant force F = 5 N - 3 N = 2 N to the right.

The resultant force is 2 N to the right.

Explanation:

Thanks me later

Answer:

2+2 =4

Explanation:

i counted my fingers ✌✌

Answer: 29.48 s

Explanation:

Given

The initial height of the ball is [tex]h=2.6\ m[/tex]

The ball leaves with an initial velocity of [tex]u=-20\ m/s[/tex]

Using the equation of motion

[tex]h=ut+\dfrac{1}{2}at^2\\\text{Insert the values}\\\\2.6=20\cdot t+\dfrac{1}{2}\times 9.8\times t^2\\\\\Rightarrow 9.8t^2+20t-5.2\\\\\Rightarrow t=\dfrac{-20\pm \sqrt{20^2-4\times 9.8\times (-5.2)}}{2\times 9.8}\\\\\Rightarrow t=\dfrac{-20\pm 603.84}{19.8}\\\\\Rightarrow t=29.48\ s\quad [\text{Neglecting negative t}][/tex]

Therefore, it take 29.48 s for ball to reach the ground.

Answer:

The best statement which describe this is actually:

D. Temperature decreases with altitude until the stratosphere is reached, and then it increases from there.

Explanation:

From the graph shown, it could be seen that, temperature decrease with height. The higher the height, the lower the temperature. For example, from the graph, when the height was around 50 km, the temperature was within the range of -10⁰C to 0⁰C. On the other hand, when the height increases around 78 km, the temperature decreases to the range of  to -70 ⁰C to -80⁰C

Answer:

0.909 J/gºC.

Explanation:

From the question given above, the following data were obtained:

Heat (Q) = 17000 J

Initial temperature (T₁) = 16 °C

Final temperature (T₂) = 38 °C

Mass (M) = 850 g

Specific heat capacity (C) =?

Next, we shall determine the change in the temperature of the metal. This can be obtained as follow:

Initial temperature (T₁) = 16 °C

Final temperature (T₂) = 38 °C

Change in temperature (ΔT)

ΔT = T₂ – T₁

ΔT = 38 – 16

ΔT = 22 °C

Finally, we shall determine the specific heat capacity of the metal. This can be obtained as follow:

Heat (Q) = 17000 J

Change in temperature (ΔT) = 22 °C

Mass (M) = 850 g

Specific heat capacity (C) =?

Q = MCΔT

17000 = 850 × C × 22

17000 = 18700 × C

Divide both side by 18700

C = 17000 / 18700

C = 0.909 J/gºC

Therefore, the specific heat capacity of the metal is 0.909 J/gºC.

Answer:

(1600 m east) + (800 m west) = (800m east)

Her displacement is 800 m east.

Explanation:

Displacement is the distance and direction between the starting point and ending point,regardless of the route traveled between them.

Answer:

From big bang and stars.

Explanation:

The extra helium got into the universe through big bang and fusion reaction that occur in stars. Our universe formed about 13.7 billion years ago with big explosion, this event is known as big bang. The fusion of hydrogen nuclei in the stars produces helium and energy so we can say that most of the extra helium got into the universe through fusion reaction that occur in the stars continuously.

Answer:

58.6 m/s²

Explanation:

Applying,

s = ut+gt²/2............ equation 1

Where s = height of the rock, u = initial velocity, t = time, g = accelration due to gravity of the planet.

From the question,

Given: s = 1.55 m, t = 0.23 s, u = 0 m/s (dropped from an height)

Substitute these values into equation 1

1.55 = (0×0.23)+g(0.23²)/2

1.55 = 0.0529g/2

0.0529g = 3.1

g = 3.1/0.0529

g = 58.6 m/s²

Answer:

Water ;)

Explanation:

have a great rest of your day :)

Answer: the answer is medium

Explanation: