Answer:
Silk fibre is obtained from silkworms
whereas artificial silk is obtained by
chemical treatment of wood pulp/cellulose.
Explanation:
Artificial silk, or rayon, is made from cellulose, obtained from cotton or wood pulp.
So any one of them in 2nd blank is correct.
What process is represented by this redox equation ? 6H 2 O+6CO 2 C 6 H 12 O 6 +6O 2
What process is represented by this redox equation ?
6H 2 O+6CO 2 C 6 H 12 O 6 +6O 2
Answer:-This equation is of the process of photosynthesis. The proper equation is :-
6CO2+6H2O→C6H12O6+6O2.
will and elephant fall faster than a mouse and why
Answer:
elephant fall faster then a mouse because of the air resistance.
hope it helps.
Explanation:
elephant fall faster than a mouse and because of the air resistance .
hope it is helpful to you
9. Bryce drove his car 10 km from his house to Belle Plaine. It took him 8 minutes. He got stopped at a long
traffic light on the return home and so he took 2 minutes longer on the return trip. What was Bryce's average
speed in km per minute? (3 pt)
Answer:
2 km/minuteExplanation:
Here, we are asked to calculate the average speed in km/minute.
As we know that,
Average speed = Total distance ÷ Total time takenHere,
→ Total distance = 10 km + 10 km
Because, he first drove 10 km from his house to Belle Plaine and then he again came back to his house.→ Total distance = 20 km
→ Total time = 8 minutes + 2 minutes
→ Total time = 10 minutes
Substitute the values in the formula of average speed,
→ Average speed = Total distance ÷ Total time taken
→ Average speed = 20km ÷ 10 minutes
→ Average speed = 2 km per minuteA resistor is connected to a 36v power supply. An ammeter measures a current of 2.0 A going through it. Determine the resistance in ohm
R = 18 ohms
Explanation:
Given:
V = 36 volts
I = 2.0 A
R = ?
Use Ohm's law to solve for the resistance:
V = IR
or
R = V/I
= (36 volts)/(2.0 A)
= 18 ohms
A regular incandescent bulb is 7% efficient. Which of the following statements best explains this statement?
A.
For every 100 units of electrical energy that enter a light bulb, 7 units are changed into light energy.
B. Every hour that a light bulb is on it uses 7 kW of electric energy.
C. 7 % of the electrical energy that reaches a light bulb is wasted as heat.
D. 7 % of the electrical energy that reaches a light bulb goes right through without being used.
Answer:
Fossil fuels store energy from the sun as
can someone help? i don’t need 14
Answer:
Explanation:
11.) d
12.) f
13.) c
15.) i
pls give me brainliest
How much work is done by 0.070 m3 of gas, when the volume remains constant with pressure of 63 x 105 Pa?
Answer:
W = 0 J
Explanation:
The amount of work done by gas at constant pressure is given by the following formula:
[tex]W = P\Delta V[/tex]
where,
W = Work done by the gas
P = Pressure of the gas
ΔV = Change in the volume of the gas
Since the volume of the gas is constant. Therefore, there is no change in the volume of the gas:
[tex]W = P(0\ m^3)\\[/tex]
W = 0 J
The diagram below shows a periodic wave. Which two points on the wave are 180 degrees out of phase?
Please explain as well, thanks so much
Answer:
A and C are 180 deg out of phase (opposite points on a 360 deg wave)
The two points on the periodic wave which are 180 degrees out of phase are point A and Point C.
When two points of wave are out of phase?The two points of a wave is said to be out of phase when they show up or down motion at different times.
If a point on the wave, say (X) is reached to the maximum or minimum point before the other point. Then these two points are said to be out of phase.
Also, when the points are 180 degree apart from each other. Which means if a point is in the crest of the wave and other is on the through.
The diagram below shows a periodic wave. In this diagram,
A and I are the end points of the periodic wave.B,C,D,E,F and G are the other points on the periodic wave.Here, the point A and C are opposite point of each other. So they are 180 degrees out of phase.Hence, the two points on the periodic wave which are 180 degrees out of phase are point A and Point C.
Learn more about the periodic wave here;
https://brainly.com/question/16749356
How does the current in a circuit change if the resistance is doubled? The current is halved. The current is doubled. The current is multiplied by four. The current stays the same.
Answer:
The current is halved
Explanation:
The relationship between the current and the resistance is given by Ohm's Law, as follows:
[tex]V = IR\\I = \frac{V}{R}[/tex]
where,
V = Voltage
I = Current
R = Resistance
Therefore, if we double the resistance:
[tex]I' = \frac{V}{2R}\\\\I' = \frac{1}{2}I[/tex]
Hence the correct option is:
The current is halved
Answer:
A
Explanation:
Help please please it's due today
Answer:
the right answer is option 2
What is the intensity of sound produced by an elephant's call if it has a power of 0.45 W and you are standing 32.5 m away from the lumbering beast
Answer:
I = 1.36 x 10⁻⁴ W/m²
Explanation:
The intensity of the sound produced by the Elephant can be calculated by using the following formula:
[tex]I = \frac{P}{A} \\\\[/tex]
where,
I = Intensity of sound = ?
P = power of sound = 0.45 W
A = area = πr² = π(32.5 m)² = 3318.3 m²
Therefore,
[tex]I = \frac{0.45\ W}{3318.3\ m^2} \\\\[/tex]
I = 1.36 x 10⁻⁴ W/m²
is a
The wire in a simple circuit
which forms an
unbroken pathway, allowing the
electric charges to flow.
A. switch
B. insulator
C. resistor
D. conductor
Answer:
I believe the answer is D: Conductor.
a bicycle process 1000 unit of momentum what would be the bicycles Momentum if its mass is tripled
The bumper cars crash into each other and stop. Explain why both bumper cars stop after the crash. [4marks]
Answer:
The collision is inelastic
Explanation:
There are two kinds of collision; elastic collision and inelastic collision. In an elastic collision, both momentum and kinetic energy are conserved.
However, in an inelastic collision, kinetic energy is not conserved. So, when the bumper of two cars collide, the cars come to a stop because the collision is inelastic.
What is the difference between the spectrum of an incandescent solid and the spectrum of an incandescent gas?
Incandescent solids emit bright-line spectra; incandescent gases emit continuous spectra.
Incandescent solids emit one wavelength; incandescent gases emit several wavelengths.
Incandescent solids emit continuous spectra; incandescent gases emit bright-line spectra.
Incandescent solids emit scattered spectra; incandescent gases emit continuous spectra.
Answer:
ncandescent solids emit continuous spectra; incandescent gases emit bright-line spectra.
Explanation:
Materials when heated emit a continuous spectrum with all wavelengths.
Hot gas gases emit a spectrum that depends on the transitions between atomic states, therefore it is a discrete spectrum.
When reviewing the answers, the correct one is:
ncandescent solids emit continuous spectra; incandescent gases emit bright-line spectra.
AYUDAAAAAAA Un ciclista de montaña se mueve cuesta abajo por la pendiente, si acelera a 3 m/s2 y se demora en bajar 15 minutos (900 segundos) ¿Qué distancia recorre? AYUDENME PORFAVOOOR
The question is: HELPAAAAAAA A mountain biker moves downhill if he accelerates at 3 m / s2 and takes 15 minutes (900 seconds) down, how far does he travel? HELP ME PLEASE
Answer: The distance travelled by the mountain biker is 2430 km.
Explanation:
Given: Acceleration = [tex]3 m/s^{2}[/tex]
Time = 15 minutes (900 sec)
Displacement = ?
Formula used to calculate the final velocity is as follows.
[tex]v = u + at[/tex]
where,
v = final velocity
u = initial velocity = 0 m/s (here)
t = time
a = acceleration
Substitute the values into above formula as follows.
[tex]v = u + a \times t\\v = 0 + 3 m/s^{2} \times 900 s\\= 2700 m/s[/tex]
The relation between velocity (speed) and distance is as follows.
[tex]Speed = \frac{Distance}{time}\\2700 m/s = \frac{Distance}{900 s}\\Distance = 2430000 m (1 m = 0.001)\\= 2430 km[/tex]
Thus, we can conclude that distance travelled by the mountain biker is 2430 km.
A box is being moved with a velocity v by a force p (parallel to v) along a level horizontal floor. The normal force is FN, the kinetic firictional force is fk, and the weight of the box is mg. Decide which forces do positive, zero, or megative work. Provide a reason for each of your answers
1. You and your forensics team are working a crime scene of a 19 year-old female who was found in the woods behind
the local hospital. She is found lying on her torso (face down), but lividity is present on the dorsal (back) side of the
victim.
What can you conclude about the victim/situation?
Answer:
You could conclude the 2nd fact
Explanation:
The conclusion will be that she died before 4-5 hours and she has been poisoned.
What will be the conclusion?It is found that the 19 years old female was found in the woods and she finds lying her face down and also the lividity is present on the backside of the woman.
First of all, we will understand what is lividity. Lividity is the process in which the color of the body changes and it starts after 1-4 hours of death.
lividity occurs when the blood does not pump the blood in the body and the blood is collected to the particular area where the gravity is acting.
If the body is found face down with signs of blanching on its back, it suggests to forensic scientists that the individual had likely died on their back and been moved.
If the body color changes to red cherry then it can be predicted that the individual died from carbon mono oxide poisoning
If the body color changes to pink it can be due to cyanide poisoning.
Thus the conclusion will be that she died before 4-5 hours and she has been poisoned.
To know more about lividity follow
https://brainly.com/question/18215801
The probability which is based on the observations of an experiment is called: A. Theoretical Probability B. Axiomatic Probability C. Experimental Probability D. None of these
Answer:
C. Experimental Probability
Explanation:
The empirical (or experimental) probability means the event that arise and depend how the event arise when the data is collected from an experiment in a more no of trials. It would be depend upon the direct observation. Here each and every observation in an experiment is known as trial
So the probability that depend upon the experiment observation is known as the experimental probability
Hence, the option c is correct
As an electric current flows through the copper sulfate solution, copper settles on the negative electrode. How will the mass of the copper covering this electrode change if we increase the current by 4 times and halve its flow time?
Answer:
Ține ogaru ca să o lingă pe măta în cur să nu mai facă alt prost ca tine
A fairground ride consists of a large vertical drum that spins so
fast that everyone inside it stays pinned against the wall when
the floor drops away. The diameter of the drum is 10 m. Assume
that the coefficient of static friction between the drum and the
rider’s clothes are 0.15.
a) What is the minimum speed required for the riders so that
they stay pinned against the inside of the drum when the
the floor drops away?
Answer:
v = 3.84 m/s
Explanation:
In order for the riders to stay pinned against the inside of the drum the frictional force on them must be equal to the centripetal force:
[tex]Centripetal\ Force = Frictional\ Force\\\\\frac{mv^2}{r} = \mu R = \mu W\\\\\frac{mv^2}{r} = \mu mg\\\\\frac{v^2}{r} = \mu g\\\\v = \sqrt{\mu gr}[/tex]
where,
v = minimum speed = ?
g = acceleration due to gravity = 9.81 m/s²
r = radius = 10 m
μ = coefficient of friction = 0.15
Therefore,
[tex]v=\sqrt{(0.15)(9.81\ m/s^2)(10\ m)}[/tex]
v = 3.84 m/s
What happens to the force of gravity between two masses if they are moved closer?
It fluctuates.
It decreases.
It stays the same.
It increases.
The force of gravity between two masses increases as they are moved closer together.
option D.
What is Newton's law of universal gravitation?Newton's law of universal gravitation states that the magnitude of the force between two masses is directly proportional to the product of the two masses and inversely proportional to the square of the distance between them.
F = GM²/R²
where;
M is massR is the distance between the massesThe force of gravity between two masses increases as they are moved closer together. This is because gravity is an attractive force that depends on the distance between the masses.
Learn more about force of gravity here: https://brainly.com/question/2537310
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Which is not true about the role of gravity in the formation of planets?
Dust and gas particles that were attracted to each other began to rotate into a protoplanetary disk.
Gravity between planetesimals caused them to join together into conglomerate clumps. Our solar system is the only place in the universe where gravity played a key part in the formation of planets.
Gravity of larger objects in orbit around the sun attracted, and cleared the orbital path of, smaller planetesimals, gas, and dust.
Our solar system is the only place in the universe where gravity played a key part in the formation of planets.
This is Flase
what do you think "you see the world the way you feel" means
According to the graph, how many atoms would remain after two half-lives?
20 atoms
80 atoms
40 atoms
50 atoms
Answer:
Let No be initial no of atoms
N = N0 / 2 after 1 half-life
N = N0 / 4 after 2 half-lives
So after 2 half-lives 20 of the 80 atoms remain
Lithium has an atomic number of 3. How many electrons does it have?
A 4
B. 1
C. 2
D. 3
Answer:
it has 3 electrons. brainliest please
I need help , Please help .
Answer: Instead, A increases slightly with temperature as the increased kinetic energy of molecules at higher temperatures causes them to move slightly faster and thus undergo more collisions per unit time.
*Edited*
How many snowmen do you think this sled can destroy? Explain your answer.
Answer:
342,690
Explanation:
I think, given 342,690 snowmen down a giant hill, that sled could destroy every single snowman :)
Un diapasón vibra a 140 [Hz] y la onda emitida por él se propaga con una rapidez de 340 m/s.Considerando lo anterior, se puede afirmar correctamente que la longitud de onda de la onda emitida por el diapasón es
The question is: A tuning fork vibrates at 140 [Hz] and the wave emitted by it propagates with a speed of 340 m / s. Considering the above, it can be correctly stated that the wavelength of the wave emitted by the tuning fork is
Answer: Wavelength of the wave emitted by the tuning fork is 2.43 m.
Explanation:
Given: Frequency = 140 Hz
Speed = 340 m/s
wavelength = ?
Formula used to calculate the wavelength is as follows.
[tex]\lambda = \frac{v}{f}[/tex]
where,
[tex]\lambda[/tex] = wavelength
v = speed
f = frequency
Substitute the values into above formula.
[tex]\lambda = \frac{v}{f}\\= \frac{340 m/s}{140 Hz} (1 Hz = 1 s^{-1})\\= 2.43 m[/tex]
Thus, we can conclude that wavelength of the wave emitted by the tuning fork is 2.43 m.
Do you think the amount of positive charge on the glass after rubbing it with silk cloth will be equal to the amount of negative charge on the silk? explain.