Answer:
amplitude is commonly for transmitting messages with a radio carrier wave, the amplitude (signal strength) of the carrier wave is varied in proportion to that of the message signal. at the receiving end, the message signal is extracted from the modulated carrier by demodulation. frequency is the encoding of information in a carrier wave with instantaneous frequency. with digital data, the frequency of the carrier is shifted among a set of frequencies, using digits like 1 and 0
physics
please help
its physic based on the law of movement
Explanation:
4) The net torque on the on the meter stick is equal to zero in order to have no rotation.
[tex]\tau_{1} = \tau_{2}[/tex]
[tex]F_{1}d_{1} = F_{2}d_{2}[/tex]
[tex](8 \:N)(0.3\: m) = F_{2}(0.1 \:m)[/tex]
[tex]F_{2} = \frac{(8 \:N)(0.3 \:m)}{(0.1 \:m)} = 24 \:N[/tex]
5) We are going the same equations in #4 here.
[tex]F_{1}d_{1} = F_{2}d_{2}[/tex]
[tex](500 \:N)(2.4 \:m) = F_{2}(3.0 \:m)[/tex]
[tex]F_{2} = \frac{(500 \:N)(2.4 \:m)}{(3.0 \:m)} = 400 \:N[/tex]
Un cuerpo permanecerá en movimiento rectilíneo uniforme o en reposo si la fuerza neta sobre él es nula o si sobre este no actúa ninguna fuerza". ¿A qué concepto corresponde la definición? *
Answer:
Primera Ley de Newton, también llamado Ley de la Inercia de Newton.
Explanation:
Este concepto es la Primera Ley de Newton o Ley de la Inercia de Newton, la cual dice textualmente que todo cuerpo al cual no se aplica ninguna fuerza externa neta no nula sobre sí se encuentra en reposo o desplazándose a velocidad constante.
Entiéndase a la inercia como la tendencia de un cuerpo a oponerse al cambio en su estado de movimiento.
What is the main energy source that causes changes in the atmosphere of Earth?
A. fossil fuels
B. the moon
C. the sun
D. greenhouse gases
Answer:
C is the correct answer.
Fiona followed these steps for a scientific investigation: 1. Collect baking soda and vinegar 2. Pour baking soda into a bowl. 3. Pour vinegar into the bowl. 4. Record observations Choose the statement which shows what Fiona is most likely investigating. This mixture will cause a physical and chemical change to the bowl. Mixing baking soda and vinegar will cause a physical and chemical change. Combining baking soda and vinegar will cause a chemical change. Combining baking soda and vinegar will cause a physical change.
Answer: The correct statement is combining baking soda and vinegar will cause a chemical change.
Explanation:
A chemical reaction is defined as the reaction in which two or more chemical substances react to form two or more different chemical substances
A new substance (product) is formed in a chemical reaction when the bonds between the reactants are broken so that the new bonds between the products can be formed.
A physical process is defined as the process in which the physical state of matter takes place. Like, in the process of vaporization, a liquid state changes to the gaseous state without changing the composition of species.
When baking soda (Sodium bicarbonate) is reacted with vinegar (acetic acid), it leads to the formation of sodium acetate, water, and carbon dioxide.
A new compound is getting formed in this process which is denoted by the chemical equation:
[tex]NaHCO_3+CH_3COOH\rightarrow CH_3COONa+H_2O+CO_2[/tex]
Hence, the correct statement is combining baking soda and vinegar will cause a chemical change.
I WILL MARK BRAINLLIEST IF U ANSWER
PLS FASTTTT
Answer:
1) vitamins
2) Meat, eggs, liver
Explanation:
1) Low levels (deficiency) in vitamins such a vitamin B12 and vitamin D can lead to tiredness.
Vitamin B12 is one of the most important nutrients for energy because it helps the blood, digestive system, brain and nervous system. Vitamin D is necessary for bone health and good immune function.
2) To prevent deficiency in vitamins, foods such as beef, eggs, liver, fish can be eaten. Also, supplements such as B-complex vitamin can be taken.
Describe How digestive system work for class 7
Answer:
Each part of your digestive system helps to move food and liquid through your GI tract, break food and liquid into smaller parts, or both. Once foods are broken into small enough parts, your body can absorb and move the nutrients to where they are needed.
Explanation:
The image shows a model of the gravitational field around Earth.
Which best describes the model?
Answer:
B not to sure tho sorry
Explanation:
sorry
Answer:it is b.
Explanation:only answer that makes sense :)
A battery-powered set of five patio lanterns is connected in series. An ammeter measures the current through the battery as 0.75 A. The total resistance of the circuit is 52 0. (a) Calculate the voltage drop across the battery. (b) Calculate the voltage drop across each load.
(a) 39 V
(b) 7.8 V
Explanation:(a) Neglecting the internal resistance of the battery, the voltage drop (V) across the battery is found from Ohm's law as follows;
V = IR -------------------------(i)
Where;
I = current through the battery
R = total resistance of the circuit.
From the question;
I = 0.75A
R = 52.0Ω
Substitute the values of I and R into equation (i)
=> V = 0.75 x 52.0
=> V = 39Volts
Therefore, the voltage drop across the battery is 39 Volts
(b) Since the set of lanterns is connected in series, then the same current flows through each of the lanterns. Also, since the lanterns are identical, the resistance ([tex]R_{L}[/tex]) of each of them is given by the total resistance (R = 52.0Ω) divided by the number of lanterns. i.e
[tex]R_{L}[/tex] = [tex]\frac{52.0}{5}[/tex]
[tex]R_{L}[/tex] = 10.4Ω [Each lantern has a resistance of 10.4Ω]
The current flowing through them is the same as the current (I = 0.75A) flowing the circuit.
Therefore, using Ohm's law, the voltage drop ([tex]V_L[/tex])across each load (lantern) is
[tex]V_L[/tex] = I x [tex]R_{L}[/tex]
[tex]V_L[/tex] = 0.75 x 10.4
[tex]V_L[/tex] = 7.8Volts
Therefore, the voltage drop across each load is 7.8 Volts
A strong magnetic field surrounds Earth. How does Earth’s magnetic field help humans?
It holds people’s belongings tight to Earth’s surface.
It’s responsible for cycling water through Earth’s four spheres.
It keeps the solar wind from reaching Earth.
It helps people navigate using a compass.
It helps cool Earth’s surface.
Answer:
-It holds people's belongings tight to Earth's surface
-it helps cool Earth's surface
- it keeps the solar wind from reaching earth
Which nucleus completes the following equation?
A. 299 Np
B. 20Pa
C. 2 Pa
D. - Np
Answer:
Option D. ²³⁹₉₃Np
Explanation:
Let the unknown be ʸₓA.
Thus, the equation becomes:
²³⁹₉₂U —> ⁰₋₁e + ʸₓA
Next, we shall determine the x, y and A. This can be obtained as follow:
92 = –1 + x
Collect like terms
92 + 1 = x
93 = x
x = 93
239 = 0 + y
239 = y
y = 239
ʸₓA => ²³⁹₉₃A => ²³⁹₉₃Np
Thus, the complete equation is:
²³⁹₉₂U —> ⁰₋₁e + ²³⁹₉₃Np
Consider a simple circuit. What can we do to make the bulb
dimmer?
-add longer wires
-increase voltage
-increase the current of the wire
-increase the resistance of the bulb
-shorten the wires
Answer:
increase the resistance of the bulb
Explanation:
In a simple circuit the power dissipated in a light bulb is proportional to the product of the voltage and the current
P = i V
Besides the voltage is
V = i R
P = i² R
Therefore, a simple method to decrease the power dissipated in a bulb to increase the resistance of the bulb, for this a series resistance is placed in the circuit.
Consequently the correct answer is increase the resistance of the bulb
A cylinder has length "L" and area of cross-section "A" what is its volume
Answer:
[tex]{ \tt{volume = \pi {r}^{2} h}}[/tex]
(v) A car
A car is pulled with a force of 60.N at angle of 30 ron, the
horizontal. Find the vertical and horizontal components of the applied
force.
Answer:
Explanation:
The vertical component is found in the magnitude of the force times the sine of the angle; the horizontal component is found in the magnitude of the force times the cosine of the angle. Thus:
vertical component = [tex]60.0sin(30.0)=30.0[/tex] and
horizontal component = [tex]60.0cos(30.0)=52.0[/tex]
Write 5 advantages of electricity.
Answer:
Quick, Efficient, Reliable, Safe and Continous
Answer:
Five advantages of electricity are :Advantages
It is transportable over long distances
It is silent
It can be used produce magnetic fields, which can be used to propel motors
It is very transformable
It is very fast, virtually the speed of light
It can be used to produce other forms of radiant energy, such as radio waves, microwaves, radiant heat and light
The physical quantity represented as rate of change of change in position in a
particular direction.
a) Speed
b) Velocity
c) Average speed
d) acceleration
Answer:
B
rate of change of its position with respect to a frame of reference, and is a function of time.
A 10 kg bowling ball is lifted from the ground to a height of 1 meter. Assuming the bowling alley is on Earth, which type of potential energy is stored in a ball and why? Class 6
gravitational potential energy because the ball move towards the earth and to balance the weight of the ball so it moves in the right direction
A new roller coaster is advertised as having a perfectly efficient (energy is conserved) first drop without the presence of an additional applied force. Upon riding this roller coaster, a group of students question whether the roller coaster is actually perfectly efficient and want to design an experiment to test this question. The students hypothesized that inclined surfaces approach perfect efficiency as the surface increases in steepness.
Describe the procedure to be used to test the hypothesis in narrative form. Give enough detail so that another student could replicate the experiment. The procedure should include an explanation of how efficiency will be determined/calculated. (2 points)
The Procedure to be used is by applying the formula of the efficiency
What is conservation of energy? A fundamental law of physics stating that the total energy of an isolated system is constant despite internal changes.What is Efficiency?It is a comparison of the energy output to the energy input in a given system.We can say that the percentage ratio of the output energy to the input energy.Efficiency = output energy / input energy
What is the procedure to be used in the test?The student should mark the efficiency of the roller coaster and they should just calculate the output energy and input energy Where input energy and output energy will be the potential energy converted to kinetic energy by the roller coaster The efficiency can be calculated by the ratio of output energy and input energy The Input energy describes the amount of electric current provided by the students and the output energy describes the speed of the roller coaster where the potential energy will be converted to kinetic energy As the voltage increases the speed of the roller coaster increases and from that the efficiency of the roller coaster can be calculated.
Learn more about the Efficiency here
https://brainly.com/question/15418098
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difference between local system and si system
Answer:
In antiquity, systems of measurement were defined locally: the different units might be defined independently according to the length of a king's thumb or the size of his foot, the length of stride, the length of arm, or maybe the weight of water in a keg of specific size, perhaps itself defined in hands and knuckles.
Systems of Measurement: there are two main systems of measurement in the world: the Metric (or decimal) system and the US standard system. ... The US Standard system uses units that have no predictable relationship to each other. For example, there are 2 cups in a pint, but 4 quarts in a gallon.
Calculate the average velocity of the cart for each fan mass. Round your answers to the nearest tenth.
The cart with Low fan mass has an average velocity of cm/s.
The cart with Medium fan mass has an average velocity of cm/s.
The cart with High fan mass has an average velocity of cm/s.
Answer:
Part A
The cart with low fan mass has an average velocity of approximately 63.29 cm/s
Part B
The cart with medium fan mass has an average velocity of approximately 45.[tex]\overline{045}[/tex] cm/s
Part C
The cart with high fan mass has an average velocity of approximately 36.496 cm/s
Explanation:
Part A
The average velocity is given as follows;
[tex]Average \ velocity, v_{average} = \dfrac{Total \ distance}{Elapsed \time \ to \ finish \ line} = \dfrac{\Delta x}{\Delta t}[/tex]
The average velocity for the 2 kg fan mass, which is the cart with low fan mass, is [tex]v_{average}[/tex] = 500 cm/7.9 s ≈ 63.29 cm/s
The cart with low fan mass has an average velocity [tex]v_{average}[/tex] ≈ 63.29 cm/s
Part B
The average velocity of the cart with medium fan mass, 4 kg, is [tex]v_{average}[/tex] = 500 cm/11.1 s = 45.[tex]\overline{045}[/tex] cm/s
The cart with medium fan mass has an average velocity [tex]v_{average}[/tex] ≈ 45.[tex]\overline{045}[/tex] cm/s
Part C
The average velocity of the cart with high fan mass, 6 kg, is [tex]v_{average}[/tex] = 500 cm/13.7 s = 36.496 cm/s
The cart with high fan mass has an average velocity [tex]v_{average}[/tex] ≈ 36.496 cm/s.
Answer:
its
67.6
78.1
89.3
Explanation:
i just took the assignment, 2021.
Which of the following physical quantity is having same SI units?
a) Speed and average speed
b) Speed and velocity
c) Speed and average velocity
d) All the above
Answer:
d) All the above
Explanation:
Speed SI unit is metre per second.Velocity SI unit is metre per second.Average speed SI unit is metre per second.Average velocity SI unit is metre per second.Therefore, as all of the physical quantities have the same SI units, the answer is d) all of the above.
Incident beam
Which order is the brightest?
Answer:
mark me as the brainliest plss
( Just answer 1 & 2) Please help! This is the last thing I have to do. I will mark brainliest asap!!
Answer:
1. Formula = distance/time
D= 112.0 meters, time =4 secs
Speed = d/t =112.0/4
= 28m/s
2.Formula = distance/time
D= 1/4 x 16093.44 m
= 402.35m
Time = 15secs
Speed= d/t
= 402.35/15
=26m/s
A book with a mass of 2 kg sits on top of a book shelf at a height of 3 m. How much potential energy does the book have
Answer:
Answer is 98 joules
Explanation:
P. E=2*9.8*3=98
S.i unit of potential energy ⚡ is joules
So answer is 98 joules
The name of the SI unit for force is the watt
\
Explanation:
The name of the SI unit for force is NEWTON .
ur statement is false
have a nice day
The number of molecules in 48.0 grams of oxygen gas o2 is
Answer:
9.03 times 10times 23 calculate it and there ya go
Answer:
Ok.
Know this.
1 moles of a gas contains 6.022x10²³molecules.
Given: 48g of Oxygen gas.
Find the moles present
Mole = Mass/Molar Mass
Molar Mass of O2 = 16x2 =32g/mol
Mole = 48/32
=1.5moles of O2.
Recall
1 moles of gas contains 6.022x10²³molecules
1.5moles would contain
1.5 x 6.022x10²³molecules
=9.033 x 10²³ molecules of Oxygen gas.
Have a great day!
A dart with a mass of 0.5kg is thrown at 15m/s and sticks into a 1kg apple hanging
on a string. What is the total momentum of the objects before the collision?
Answer:
Before the collision:
m v1 = .5 kg * 15 m/s = 7.5 kg-m/s
Incidentally, after the collision
(M + m) v2 = 7.5
v2 = 7.5 / (1 + .5) = 5 m/s
Select the vocabulary term that best matches this definition.
Continual rise in the average temperature of Earth's climate system due to the increase of greenhouse gasses in the atmosphere. The rise in Earth's average surface temperature •Fracking
•Global Warming
•Transverse Wave
•Transmission
Answer:
global warming
Explanation:
cuz duh.... .....
calcula el peso de una mesaven la tierra cuya masa es de 60 kg
Answer:
W = 588 N
Explanation:
The given question is ,"calculate the weight of a table on the earth whose mass is 60 kg"
The mass of the table, m = 60 kg
We need to find the weight of a table on the earth.
The weight of an object is given by :
W = mg
Where
g is acceleration due to gravity
W = 60 kg × 9.8 m/s²
W = 588 N
Hence, the weight of the table is 588 N.
You drive a car at a speed of 40 mph for 600 miles. How long did it take you to travel that distance?
A. 18 hours
B. 12 hours
C. 24 hours
D. 15 hours
Answer:
B
Explanation:
What is the net force on the object represented by this FBD?
Answer:
5N up
Explanation:
10N up + 15N up = 25N up
25N up - 20N down = 5N up
