Answer:
784,000 J
Explanation:
For this question we can simply use the equation for the Kinetic Energy which is : [tex]\frac{1}{2} mv^2[/tex], where m = the mass and v = the velocity.
So let's put the values given into the equation.
[tex]K.E = \frac{1}{2} *2000*(28)^2 = 784000 J[/tex]
The car's kinetic energy is 784,000 Joules
Describe how an oscilloscope should be used to measure the frequency of the sound wave from the sonometer
Answer:
T = reading (cm) time base (s / cm)
f = 1 / T
Explanation:
An oscilloscope is a piece of equipment that allows you to visualize and measure a wave that reaches you, in the case of having a sonometer this transforms the sound wave into an electrical signal to be introduced through one of the voltage channels of the equipment, on the screen we will see the oscillating alternating signal, if it is fixed we can make the reading, if it is moving the time base and the trigger must be adjusted to stop it.
In the oscilloscope we can read the period of the signal, this is the time it takes for the signal to repeat itself with this value, we can calculate the frequency with the formula, for the reading of the period the distance is measured on the labeled screen and multiplied by the time base
T = reading (cm) time base (s / cm)
f = 1 / T
Khalid has been studying the gravitational attraction between three pairs of objects. The table shows the distance between each pair and the gravitational attraction between them relative to the other pairs. Which two objects have the greatest
gravitational force, Explain Your Answer?
Answer:
Explanation:
Probably the most famous force of all is gravity. We humans on earth think of gravity as an apple hitting Isaac Newton on the head. Gravity means that stuff falls down. But this is only our experience of gravity. In truth, just as the earth pulls the apple towards it due to a gravitational force, the apple pulls the earth as well. The thing is, the earth is just so massive that it overwhelms all the gravity interactions of every other object on the planet. Every object with mass exerts a gravitational force on every other object. And there is a formula for calculating the strengths of these forces, as depicted in the diagram below:
Diagram of gravitational forces between two spheres
Diagram of gravitational forces between two spheres
Let’s examine this formula a bit more closely.
F refers to the gravitational force, the vector we ultimately want to compute and pass into our applyForce() function.
G is the universal gravitational constant, which in our world equals 6.67428 x 10^-11 meters cubed per kilogram per second squared. This is a pretty important number if your name is Isaac Newton or Albert Einstein. It’s not an important number if you are a ProcessingJS programmer. Again, it’s a constant that we can use to make the forces in our world weaker or stronger. Just making it equal to one and ignoring it isn’t such a terrible choice either.
m_1m
1
m, start subscript, 1, end subscript and m_2m
2
m, start subscript, 2, end subscript are the masses of objects 1 and 2. As we saw with Newton’s second law (\vec{F} = M\vec{A}
F
=M
A
F, with, vector, on top, equals, M, A, with, vector, on top), mass is also something we could choose to ignore. After all, shapes drawn on the screen don’t actually have a physical mass. However, if we keep these values, we can create more interesting simulations in which “bigger” objects exert a stronger gravitational force than smaller ones.
\hat{r}
r
^
r, with, hat, on top refers to the unit vector pointing from object 1 to object 2. As we’ll see in a moment, we can compute this direction vector by subtracting the location of one object from the other.
r^2r
2
r, squared refers to the distance between the two objects squared. Let’s take a moment to think about this a bit more. With everything on the top of the formula—G, m_1m
1
m, start subscript, 1, end subscript, m_2m
2
m, start subscript, 2, end subscript—the bigger its value, the stronger the force. Big mass, big force. Big G, big force. Now, when we divide by something, we have the opposite. The strength of the force is inversely proportional to the distance squared. The farther away an object is, the weaker the force; the closer, the stronger.
Hopefully by now the formula makes some sense to us. We’ve looked at a diagram and dissected the individual components of the formula. Now it’s time to figure out how we translate the math into ProcessingJS code. Let’s make the following assumptions.
We have two objects, and:
Each object has a PVector location: location1 and location2.
Each object has a numeric mass: mass1 and mass2.
There is a numeric variable G for the universal gravitational constant.
Given these assumptions, we want to compute a PVector force, the force of gravity. We’ll do it in two parts. First, we’ll compute the direction of the force \hat{r}
r
^
r, with, hat, on top in the formula above. Second, we’ll calculate the strength of the force according to the masses and distance.
Remember when we figured out how to have an object accelerate towards the mouse? We're going to use the same logic.
Which of these would NOT produce visible light? A) flint B) lightning C) microwave D) sun
Answer:
A microwave
Explanation
The human retina can only detect incident light that falls in waves 400 to 720 nanometers long, so we can't see microwave or ultraviolet wavelengths. This also applies to infrared lights which has wavelengths longer than visible and shorter than microwaves, thus being invisible to the human eye.
Answer:
C.) Microwave
Explanation:
USAtestprep
According to the law of reflection, what is the angle of incidence?
It is the angle the incident ray makes with a line drawn perpendicular to the viewer.
It is the angle the incident ray makes with a line drawn perpendicular to the reflecting surface.
It is the angle the incident ray makes with a line drawn parallel to the reflecting surface.
the angle of incidence is always equal to the angle of reflection,
Explanation:
Important Information. When light is reflected from a surface, the angle of incidence is always equal to the angle of reflection, where both angles are measured from the path of the light to the normal to the surface at the point at which light strikes the surface. This equality is known as the law of reflection.
Answer:
It is the angle the incident ray makes with a line drawn perpendicular to the reflecting surface
Energy can enter and exit which of the following systems?
A. Both open and close
B. Both open and isolated
C. Open Only
C. Isolated only
Answer:
A. Both open and close
Explanation:
just took the test
Can you help me please? I'll mark brainiest
Answer:
picture isn't rlly clear :/
Answer:
Don't know this but I will do research
a wave having a wavelength of 4.7 meters and an amplitude of 2.5 meters travels a distance of 28 meters in 7 seconds. determine the frequency and period of the wave
Answer:
T(Period) = 1.33sf(Frequency) = 0.75Hz (cycles/second)Explanation:
Given:λ = 4.0mAmplitude = 25md = 24ms = 8.0sRequired:f = ?T = ?Analysis:v = λff =N/tT = 1/fv = d/tSolve:v = d/t = 24/8.0 → v = 3.0m/sv =λf → f = v/λ = 3.0/4.0 → f = 0.75HzT = 1/f = 1/0.75 → T = 1.33sHopes this helps. Mark as brainlest plz!Why can elastic band particles stay together
Answer:
The particles are held rigidly in place by all the other particles around them so they can't slip past one another or move apart. This gives solids a fixed shape and a fixed volume.
How much time would it take for an object to fall 4.7 meters
Answer:
4.7 is 10 as much as the number 0.47.
If you multiply 0.47 x 10 it will equal 4.7
Explanation:
An Abrams tank has a mass of 62,Ō00 kg. If its top speed is 20.0 m/s, what is its momentum at top speed?
Answer:
1240000 kg * m/s
Explanation:
p = momentum
p = mass * velocity in kg* m/s
62,000 kg * 20 m/s = 1240000 kg * m/s
2. Perform the following:
2. 1111+1102
[tex]\huge{\textbf{\textsf{{\color{pink}{An}}{\red{sw}}{\orange{er}} {\color{yellow}{:}}}}}[/tex]
ㅤ1,111+1,102
ㅤ= 2,213
Thanks Pls mark as brainliestHope it helpsUn tanque de 50 litros tiene un gas a CNPT. ¿Cuánto valdrá la presión si la temperatura aumenta 40 °C, y el volumen permanece constante?
Answer:
La presion a 40 °C es 1.05 atm.
Explanation:
Usando la ecuación ideal de los gases.
[tex]PV=nRT[/tex]
Debemos recordar, que CNPT significa condiciones normales de presión y temperatura.
Para el primer estado tenemos:
[tex]P_{1}V_{1}=nRT_{1}[/tex]
Donde:
P(1) es la presion en el estado incial (1 atm)V(1) es el volumen incial (50 L)T(1) es la temperatura incial (25 °C = 298 K)Para el segundo estado:
[tex]P_{2}V_{2}=nRT_{2}[/tex]
Donde:
P(2) es la presion en el estado final ( x atm)V(2) es el volumen final (50 L)T(2) es la temperatura final (40 °C = 313 K)Como ambas ecuaciones tienen el mismo valor de volumen podemos igualarlas:
[tex]\frac{nRT_{1}}{P_{1}}=\frac{nRT_{2}}{P_{2}}[/tex]
n y R permanecen constantes, se puden cancelar.
[tex]\frac{T_{1}}{P_{1}}=\frac{T_{2}}{P_{2}}[/tex]
Despejamos P(2).
[tex]P_{2}=\frac{P_{1}T_{2}}{T_{1}}[/tex]
[tex]P_{2}=\frac{1*313}{298}[/tex]
[tex]P_{2}=1.05\: atm[/tex]
Espero te haya sido de ayuda!
please help me asap thankss
EXPLAIN WHY A POLYTHENE ROD GAINS A NEGATIVE CHARGE WHEN IT IS RUBBED WITH A CLOTH
Answer:
When a polythene rod is rubbed with a duster, the friction causes electrons to gain energy. Electrons gain enough energy to leave the atom and 'rub off' onto the polythene rod. The polythene rod has gained electrons, giving it a negative charge.
Explanation:
Hope it helps
What is the wavelength?
14 What is the weight of each of
the following masses on Eth?
a) 2 kg
b) 3.5kg
c) 5.25 kg
Newton’s
Explanation:
On earth,
g=10 m/s^2
When M=2 kg,
weight on earth=2×10
=20N
When M=3.5 kg,
weight on Earth=3.5×10
=35N
When M=5kg,
weight on Earth=5.25×10
=52.5N
a wave is a disturbance that carries energy from one place to another true or false
A 12-ohm resistor is connected in series with a 23-ohm resistor. They are placed across a 120-volt power source. What is the current in the circuit?
A) 35 amps
B) 10 amps
C) 5.2 amps
D) 3.4 amps
Answer:
3.43 A
Explanation:
Applying,
V = IR'.............. Equation 1
Where V = Voltage, I = current, R' = Total resistance
Make I the subject of the equation
I = V/R'........... Equation 2
From the question
Given: V = 120 volt, R' = (12+23) = 35 0hm
Substitute these values into equation 2
I = 120/35
I = 3.43 A
como te llamas?
(nom
Answer: como mi llamo yo?
Explanation: in rlf Maria
Answer:nai
Explanation:
Transverse and longitudinal waves both have what?
Answer:
Following features are similar in longitudinal and transverse waves: Both waves are mechanical waves. Both transport energy without transporting matter. Particles oscillate about their mean position in both waves.
Why do you think fixed boundaries ""flip"" waves and loose boundaries do not?
Answer:
When the obstacle is fixed, the law of action and reaction, makes the reflected wave is inverted.
When the obstacle is mobile, he mobile point, it moves in the direction of the wave, therefore there is no inversion of it.
Explanation:
Waves when they reach an obstacle behave like a shock, therefore if we use the conservation of momentum the wave must reverse its speed, this explains that the speed changes sign, the wave is reflected.
When the obstacle is fixed, the wave when it reaches the obstacle exerts a force on the point, by the law of action and reaction the point exerts on the wave a force of equal magnitude but in the opposite direction, this reaction force which makes the reflected wave is inverted.
When the obstacle is mobile, this is without friction, when the wave arrives it exerts a force on the mobile point, it moves in the direction of the wave, reaching the maximum amplitude of the incident wave, when it is reflected the point begins to go down along with the wave, therefore there is no inversion of it.
Danny measures the temperature of a 1.0-kg sample of sand and a 1.0-kg sample of soil. He then leaves both samples in the Sun for the 2.0 hours. At the end of this time, he measures their temperatures again.
A.
The soil absorbed more heat than the sand.
B.
The sand absorbed more cold energy than the soil.
C.
The soil absorbed more cold energy than the sand.
D.
The sand absorbed more heat than the soil.
Answer:
The sand absorbed more heat than the soil.
Explanation:
your welcome
What feature means the Earth wire will take current away from the case reducing the chance of accidental electrocution?
A:
A high resistance
B:
A fuse connected to it
C:
A very low resistance
D:
Stops the flow of the current
«
A gold pendulum swings with angular acceleration a, and a point on the edge has tangential acceleration a. A silver pendulum swings with angular acceleration 3a, and a point on the edge has tangential acceleration 5a. How does the radius of the gold pendulum r gold compare with the silver pendulum r silver ?
A 1/15
B 5/3
C 15
D 3/5
Answer:
D - 3/5r
Explanation:
Khan Academy
For a series circuit:
а. the value of resistance may be different for each resistor in the circuit.
b. the total resistance is the sum of the resistance in the circuit.
c. the total resistance increases as resistors are added to the circuit.
d. All of the above
Answer:
b
Explanation:
because the same current flows through the lamps and the total voltage across all the lamps is the sum of all the separate voltages across them.
1 point
The Sun is a massive star at the center of our Solar System. The planets
closest to the Sun are terrestrial planets, and those farther away are gas
giants. Which force maintains this arrangement of the Solar System? *
Electromagnetism
Friction
Gravity
Torsion
Answer:
Gravity
Explanation:
It is gravity because the sun's gravity pulls all the planets towards itself and keeps the planets in the sun's orbit
Give an example of a genotype for a person with brown hair. (brown is dominant)
Answer:
Bb can be an example
Explanation:
That is Because brown is dominated, so it is in Capital.
Elements in Group
are common alkaline earth metals.
Answer here
Due in a few minutes plzzzz help! Will mark brainliest
Answer:
1. 960
2. 16.6666
3. 0.41666666666
4. 10
Explanation:
A*V=W
A*120=50
V=I*R
R being resistance
(I'm not a 100% sure on 2 & 3)
When a wave is allowed to pass through a medium, the wave has been
a)transmitted
b)reflected
c)absorbed
d)encoded
Suppose you take
a short piece of wire that is not
attached to anything and move it up and down in a
magnetic field. Explain whether or not a current will be
induced, and why.
Answer:
a current will be induced.
Explanation:
Answer:
Explanation:Sample Response: A current will not be induced because the wire is not part of a closed circuit. The electrons have no place to flow to.
What did you include in your response? Check all that apply.
A current will not be induced.
The wire is not part of a closed circuit.