Which statement about force is incorrect

A. Some forces cause objects around us to move.
B. Some forces keep objects around us from moving
C. Force is the ability to change motion and transfer matter.
D. Force causes changes in the motion and energy of matter.​

light

Explanation:

a computer has a screen and speakers, which produce light and siund

Answer:

yes because if red light was natural then it should cause more damage because that how it is

Answer:

its yes because if red light was natural then it should cause more damage because that how it is

Explanation:

Efficiency is defined as the ratio between the useful output over the total amount consumed. [tex]E = \frac{useful}{total}[/tex]

The fan does 500W of useful work while wasting 300 W. The total power consumption is 800 W (500 + 300).

Answer:

crest moon

Explanation: because you ar etalking about moons

Answer:

The metal screw is pushing on the magnet.

Answer:

6 Kg.

Explanation:

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

Force (F) = 30 N

Acceleration (a) = 5 m/s²

Mass (m) =?

Force (F) is defined as the product of mass (m) and acceleration (a). Mathematically, it can be expressed as:

Force (F) = mass (m) × acceleration (a)

F = ma

With the above formula, we can obtain the mass of the object as follow:

Force (F) = 30 N

Acceleration (a) = 5 m/s²

Mass (m) =?

F = ma

30 = m × 5

Divide both side by 5

m = 30 / 5

m = 6 Kg

Therefore, the mass of the object is 6 Kg

Answer:

the answer would be the first choice!

Explanation:

Answer:

G.) The number atoms of that element in the molecule

Explanation:

F is incorrect because the coefficient represents the amount of one type of molecule, not the subscript

G is correct because subscripts represent how many atoms of that element are present in that single molecule

H is incorrect because energy is not represented in this simple type of equation

J is incorrect because it doesn't even make sense

Answer:

[tex]136.28\ \text{s}[/tex]

19.08 m/s or 68.688 km/h

Explanation:

a = Aceleración = [tex]0.14\ \text{m/s}^2[/tex]

s = Desplazamiento = [tex]1.3\ \text{km}=1300\ \text{m}[/tex]

u = Velocidad inicial = 0

t = Tiempo empleado

De las ecuaciones cinemáticas obtenemos

[tex]s=ut+\dfrac{1}{2}at^2\\\Rightarrow 1300=0+\dfrac{1}{2}\times 0.14t^2\\\Rightarrow t=\sqrt{\dfrac{1300\times 2}{0.14}}\\\Rightarrow t=136.28\ \text{s}[/tex]

El tiempo necesario para recorrer una distancia de 1,3 km es [tex]136.28\ \text{s}[/tex]

[tex]v^2-u^2=2as\\\Rightarrow v=\sqrt{2as+u^2}\\\Rightarrow v=\sqrt{2\times 0.14\times 1300+0}\\\Rightarrow v=19.08\ \text{m/s}=19.08\times 3.6=68.688\ \text{km/h}[/tex]

La velocidad final del automóvil es 19.08 m/s so 68.688 km/h.

Answer:

1. Sound waves are changed into electrical

2. Radio waves are released by transmitter

by radios

3. Radio waves are converted to sound waves

Explanation:

Answer:

The person in front of me is right

Explanation:

There’s my proof

Answer:

the friction force is 41.4N

Explanation:

from f=μ R, where R is the normal reaction. this is equal to the weight of the object

therefore, f = 0.46*90 = 41.4 N

Answer:

Work done = -220,000 Joules.

Explanation:

Given the following data;

Mass = 1100kg

Initial velocity = 20m/s

To find workdone, we would calculate the kinetic energy possessed by the car.

Kinetic energy can be defined as an energy possessed by an object or body due to its motion.

Mathematically, kinetic energy is given by the formula;

[tex] K.E = \frac{1}{2}MV^{2}[/tex]

Where,

Substituting into the equation, we have;

[tex] K.E = \frac{1}{2}*1100*20^{2}[/tex]

[tex] K.E = 550*400[/tex]

K.E = 220,000J

Therefore, the workdone to bring the car to rest would be -220,000 Joules because the braking force is working to oppose the motion of the car.

Answer:

They contain iron.

Explanation:

Iron is made of metal and magnets attract to metal Iron.

Answer:

Question: Find out more about either one of these forms of energy

Answer:

Solar energy: This is energy generated from the sunlight, and it can be converted to other energy that can be useful. Solar energy from the sun considered a clean source of electricity can be converted to a usable electricity source or stores the light in batteries for thermal use. This energy conversion is possible through the use of solar panels attached to where the conversion would take place so as to capture the light from the sun.

Question: What is being done to make it a more efficient source of energy

Answer:

1. When using solar energy to power homes, it is more efficient to have panels on a green roof because of the characteristics of this roof not to reflect or lose more light from the sun.

2. Improvements on the type of solar cell to use for instance that are cheaper and could maximize the energy from the sun are all ways that make it more efficient.

3. Since solar panels don't produce energy at night, usage of batteries that could store electricity during the day or when the sun is not obscured would make solar more efficient.

Question: where it is being used in the United States?

Answer:

1. California

2. Nevada

3. New York

4. Texas

(if you have Q1: Carbon is found in: living animals and plants, oceans, rocks, atmosphere, and fossil fuels)

Q2: Humans are burning carbon and putting it into the atmosphere.

Q3: True

Q4: While carbon dioxide is in the air waiting to be reabsorbed it traps the sun's heat.

(and if you have Q5: In the last 250 years, the amount of carbon in the air has increased by 40 percent.)

Answer:

Series.

Explanation:

Ohm's law states that at constant temperature, the current flowing in an electrical circuit is directly proportional to the voltage applied across the two points and inversely proportional to the resistance in the electrical circuit.

Mathematically, Ohm's law is given by the formula;

[tex] V = IR[/tex]

Where;

V represents voltage measured in voltage.

I represents current measured in amperes.

R represents resistance measured in ohms.

A series circuit is when there is only one path to and from the power source. Thus, the amount of current flowing through the circuit is the same while the voltage is given by the summation of each voltage across each component in the electrical circuit.

Answer:

Explanation:

i believe a if not c

Answer:

1. 40/20=2meters per second

2. 0

3.240/20=12 meters per second

Answer:

1.33m/s²

Explanation:

Given parameters:

Initial velocity  = 5m/s

Final velocity  = 25m/s

Time taken  = 15seconds

Unknown:

Acceleration  = ?

Solution:

Acceleration is the rate of change of velocity with time.

  Acceleration  = [tex]\frac{v - u}{t}[/tex]  

  v is the final velocity

  u is the initial velocity

  t is the time taken

 So;

    Acceleration  = [tex]\frac{25 - 5}{15}[/tex]    = 1.33m/s²

Answer:

d = 61.75 m

Explanation:

Given that,

A ball droped from a building.

We need to find how fast is it traveling after falling 3.55 s.

As it is dropped, its initial velocity is equal to 0.

Let d is the distance it covers after falling 3.55 s.

We can use second equation of motion to find d.

[tex]d=ut+\dfrac{1}{2}at^2[/tex]

Here, u = 0 and a =g

[tex]d=\dfrac{1}{2}gt^2\\\\d=\dfrac{1}{2}\times 9.8\times (3.55)^2\\\\d=61.75\ m[/tex]

So, it will cover 61.75 m after falling 3.55 seconds.

Answer:

Explanation: that’s all

Answer:

When the resistances are connected in the parallel the equivalent resistance will be always less than the value of the lowest resistance in the parallel circuit.

The equivalent resistance in the parallel circuit can be calculated using the following formula.

1/R=1/R1+1/R2+1/R3

1/R= 1/10+1/20+1/30

1/R=(6+3+2)/60

1/R=11/60

R=60/11

R=5.45 Ohms

Answer:6.25m/s

Explanation:

V=F*lander

V=FL/2=250*0.05/2

Answer: Local governments can resolve a conflict by cooperating and spreading the costs of expensive projects. What kinds of problems cause state governments to help local governments? No economic growth or improvements are problems that cause governments to help local governments.

Answer its false

Explanation:

Answer:

They are equal

Explanation:

Multiply the mass by the velocity.

Answer:

Try lookin those questions up on Brainly

Explanation:

Answer: 55 degrees celsius

Explanation:

The measured temperature of the mixture of water was 50°C.

When two physical systems are connected by a heat-permeable path, they are in thermal equilibrium if there is no net flow of thermal energy between them.

The zeroth law of thermodynamics governs thermal equilibrium. A system is said to be in thermal equilibrium with itself if the temperature within it is uniform and constant over time.

Initial temperature of 100 mL of water is 20°C

and Initial temperature of 100 mL of water is 80°C

Let at thermal equilibrium, temperature of the mixture is t° C.

Hence, at thermal equilibrium,

100 mL × ρ × ( t - 20°C) × s = 100 mL × ρ × ( 80°C -t) × s

t - 20° C = 80°C -t

2t = 100°C

t = 50°C

Hence, the measured temperature of the mixture of water was 50°C.

Learn more about thermal equilibrium here:

https://brainly.com/question/29736747

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