I think ....... the answer will be ......
like a theory
A coin dropped in the lift it takes time 0.5 s to reach the floor when lift is staionary it takes time t when lift is moving up
Answer:
t₁ > t₂
Explanation:
A coin is dropped in a lift. It takes time t₁ to reach the floor when lift is stationary. It takes time t₂ when lift is moving up with constant acceleration. Then t₁ > t₂, t₁ = t₂, t₁ >> t₂ , t₂ > t₁
Solution:
Newton's law of motion is given by:
s = ut + (1/2)gt²;
where s is the the distance covered, u is initial velocity, g is the acceleration due to gravity and t is the time taken.
u = 0 m/s, t₁ is the time to reach ground when the light is stationary and t₂ is the time to reach ground when the lift is moving with a constant acceleration a.
hence:
When stationary:
[tex]s=\frac{1}{2}gt_1^2\\\\t_1^2=\frac{2s}{g} \\\\When\ moving\ with\ acceleration(a):\\\\s=\frac{1}{2}(g+a)t_2^2\\\\t_2^2=\frac{2s}{g+a}[/tex]
Hence t₂ < t₁, this means that t₁ > t₂.
does anybody have social media and could help me with my homework ? i will send you pictures of my work please all of my work is due tomorrow!! i need help
An organism with the alleles Aa is called __________, while one with AA or aa is called __________.
A. heterozygous, hom/ zygous
B. heterozygous, homo/zygous
Answer:
Hetefrozygous, homofzygous
pls help
What graph indicates no reference to direction of motion, and explain why.
Answer:
graph A
Explanation:
the slope of the distance-time graph is speed, speed is a scalar (with magnitudes but no direction)
but the slope for the velocity time graph is acceleration, acceleration is vector quantity ( has magnitude and direction)
Which of the following are vector quantities? Check all that apply.
A. Distance
B. Acceleration
C. Time
D. Velocity
Could someone please help me..?
Protons:
A. are found in the nucleus and are "locked" in.
B. are found on energy levels and are "locked" in.
C. are found in the nucleus and are able to travel.
D. are found on energy levels and are able to travel.
Answer:
a
Explanation:
are found in the nucleus and are locked in
Answer:
A
Explanation:
Thats what I think the answer is because protons and neutrons bond together in the nucleus.
If a car is traveling 35 m/s for 200 seconds, how far will the car travel?
jack tries to place magnets on the door of his refrigerator. he observes that the magnets don't stick. he guesses that the door of the refrigerator is made of a non magnetic substance. what stage of scienctific investigation does his guess represent
a. ask questions
b. construct a hypothesis
c. explain the results
d. make observation
Answer:D
Explanation:
Because u have to make observation then ask a question
At t = 3 seconds, what is the velocity of the object
Answer:
NO ANSWER
Explanation:
there is no tragectory or diagram given
WHICH OBJECT?
What has gravity led scientists to understand?
Answer:
Gravity is a non-contact force that was observed famously by Sir Isaac Newton, who watched an apple falling from a tree to the ground. ... Newton was the first to realise that gravity existed in space and it was the force which holds the Moon in orbit around the Earth and planets in orbit around the Sun.
Answer:
Newton's theory had prove that all objects, as small as an apple and as large as a planet, are subjected to gravity. Gravity helped to keep the planets rotating around the sun and creates the ebbs and flows of rivers and tides.What is the wavelength of an earthquake wave if it has a speed of 10 km/s 3 points
and a frequency of 15 Hz?*
.67 km
1.5 km
150 k
Answer:
0.67 km
Explanation:
Given that,
The speed of a wave, v = 10 km/s = 10000 m/s
The frequency of a wave, f = 15 Hz
We need to find the wavelength of the wave. The speed of wave in terms of wavelength and frequency is given by :
[tex]v=f\lambda\\\\\lambda=\dfrac{v}{f}\\\\\lambda=\dfrac{10000}{15}\\\\=666.66\ m[/tex]
or
= 0.67 km
So, the wavelength of the wave is 0.67 km.
An alpha particle (the nucleus of a helium
atom), carrying a charge of 3.2 x 10-19 C
moves at 4.1 x 107 m/s at a right angle to a
magnetic field.
If the particle experiences a force of
2.3 x 10-14 N due to the magnetic field, what
is the magnitude of the magnetic field?
Answer in units of T.
Answer:
QuestionExplanation:
Could someone please help me..?
Electrons:
A. are found in the nucleus and are "locked" in.
B. are found on energy levels and are "locked" in.
C. are found in the nucleus and are able to travel.
D. are found on energy levels and are able to travel.
Why is the global temperature increasing? Explain the science behind it.
En que porcentaje varia la aceleracion de un cuerpo cuando su masa que reduce en un 50% y la fuerza resultante aplicada sobre el permanece constante
Answer:
La aceleración aumentaría en un 100%
Explanation:
Según la ley de Newton, la aceleración de un objeto es directamente proporcional a la fuerza aplicada al objeto. Está dado por:
Fuerza = masa * aceleración
Supongamos que la fuerza inicial es F, la aceleración inicial es a₁, mientras que la masa inicial es m. Por eso:
F = ma₁
a₁ = F / m
Si la masa se reduce en un 50% (0,5 m) y la fuerza se mantiene constante, la aceleración es:
a₂ = F / (0.5 m)
a₂ = 2 (F / m)
a₂ = 2a₁
La aceleración aumentaría en un 100%
As a object falls from a high-flying stationary helicopter, its velocity increases and its acceleration ____.
increases.
decreases.
stays at 10 m/s2.
is zero the entire time.
which of the following is NOT an example of a heating appliance?
A. steam engine
B. curling iron
C. coffemaker
D. clothes iron
ay wants to buy a new fireplace insert that will burn gas instead of wood. She normally uses two cords of wood in the winter. Wood costs $250/cord. She is interested in knowing how much she will save if she burns gas in the fireplace insert. Gas costs $0.91 per therm. One therm is 100,000 BTU. The fireplace insert burns 33,000 BTU per hour. Kay figures she will burn the fireplace 5 hours per day for 120 days. How much will she save in one winter if she burns gas instead of wood
Answer:
Saved Money = $ 319.82
Explanation:
First, we will calculate the cost of wood:
[tex]Wood\ Cost = (No.\ of\ Cords)(Unit\ Cost)\\Wood\ Cost = (2 cords)(\$ 250/cord)\\Wood\ Cost = \$ 500\\[/tex]
Now, we calculate the time to burn gas:
[tex]Time\ to\ burn\ gas = (5\ hours/day)(120\ days)\\Time\ to\ burn\ gas = 600\ hr\\[/tex]
Now, we calculate the energy:
[tex]Energy\ Required = (600\ hr)(33000\ BTU/hr)(\frac{1\ therm}{100000\ BTU})\\\\Energy\ Required = 198\ therm\\[/tex]
Now, we will calculate the cost of gas:
[tex]Gas\ Cost = (Energy\ Required)(Unit\ Cost)\\Gas\ Cost = (198\ therm)(\$\ 0.91/therm)\\Gas\ Cost = \$\ 180.18\\[/tex]
Now, we will calculate the amount of money saved:
[tex]Saved\ Money = Wood\ Cost - Gas\ Cost\\Saved\ Money = \$\ 500 - \$\ 180.18\\[/tex]
Saved Money = $ 319.82
1. The energy an object has while it is moving is called kinetic energy, or the energy of
A)traction
B)friction
C)magnetism
D)motion
Answer:
D
Explanation:
I hope this helps :)
Let me know if you want a full explanation
The energy an object has while it is moving is called kinetic energy, or the energy of motion. Thus, the correct option for this question is D.
What do you mean by Kinetic energy?Kinetic energy may be defined as a type of energy that an object possesses due to its motion. It is defined as the work that is required in order to accelerate a body of a given mass from rest to its stated velocity. It is also known as the energy that is possessed by an object by the virtue of its motion.
Kinetic energy is the energy of motion, observable as the movement of an object, particle, or set of particles. Any object in motion is using kinetic energy: a person walking, a thrown baseball, a crumb falling from a table, and a charged particle in an electric field are all examples of kinetic energy at work.
Therefore, the energy an object has while it is moving is called kinetic energy, or the energy of motion. Thus, the correct option for this question is D.
To learn more about Kinetic energy, refer to the link:
https://brainly.com/question/25959744
#SPJ2
Una bola se lanza verticlamente de la parte superior de un edificio con una velocidad inicial 25 m/s la bola impacta al suelo en la base del edificio 7 segundos despues de ser lanzada ¿que altura subio la bola
Answer:
S = 415.1 meters
Explanation:
Dados los siguientes datos;
Velocidad inicial = 25 m/s
Tiempo, t = 7 segundos
Para encontrar la altura (desplazamiento) de la pelota, usaríamos la segunda ecuación de movimiento;
[tex] S = ut + \frac {1}{2}at^{2}[/tex]
Dónde;
S representa el desplazamiento o altura medida en metros.
u representa la velocidad inicial medida en metros por segundo.
t representa el tiempo medido en segundos.
a representa la aceleración medida en metros por segundo cuadrado.
Sustituyendo en la ecuación, tenemos;
[tex] S = 25*7 + \frac {1}{2}*(9.8)*7^{2}[/tex]
[tex] S = 175 + 4.9*49 [/tex]
[tex] S = 175 + 240.1 [/tex]
S = 415.1 meters
2.Write the formula associating energy with power
3.Write the formula associating potential energy with height.
4. By substitution of the formula on question 3 for the formula in question 2, rewrite the formula for power.
(PLEASE PLEASE HELP ASAP ILL MARK BRAINLIEST)
Answer:
[tex] Power = \frac {mgh}{time} [/tex]
Explanation:
2. Power can be defined as the energy required to do work per unit time.
Mathematically, it is given by the formula;
[tex] Power = \frac {Energy}{time} [/tex]
3. Potential energy can be defined as an energy possessed by an object or body due to its position.
Mathematically, potential energy is given by the formula;
[tex] P.E = mgh[/tex]
Where,
P.E represents potential energy measured in Joules.
m represents the mass of an object.
g represents acceleration due to gravity measured in meters per seconds square.
h represents the height measured in meters.
4. Substituting the equation in 3 into equation in 2 above, we have;
[tex] Power = \frac {mgh}{time} [/tex]
A healthy breakfast should include foods from the Grains group, the Vegetables OR Fruits group, and the Dairy OR the Protein group. * O True O False
Answer:
vry true
Explanation:
yes because ll thoes give you protien sorry for my bad spelling
Answer:
True
I Had this before
Miles Tugo is camping in Glacier Canyon and he makes a loud holler. The sound bounces off the nearest canyon wall (which is located 170 meters away from Miles) and returns to Miles.
Determine the time elapsed between when Miles makes the holler and the echo is heard.
Answer:
It would take 1 s to hear the echo.
Explanation:
Here, the sound covered a total of 340 meters, since it bounces off the canyon wall and travels back to Miles in the form of echo.
The time elapsed can be determined by,
v = [tex]\frac{2D}{t}[/tex]
⇒ t = [tex]\frac{2D}{v}[/tex]
where: v is the speed of sound in air (343 m/s), D is the distance of the nearest canyon (170 m).
So that,
2D = 2 x 170 = 340 m
Thus,
t = [tex]\frac{340}{343}[/tex]
= 0.9913 s
t = 1 s
It takes 1s for Miles to hear his echo.
Pls someone help me!!!!!
Answer:
Seeing as how the balloon is mainly negatively charged and the paper being positively charged, the answer would be B: The tissue paper will stick to the balloon because the tissue paper is positively charged!
This project will allow you to “see” the difference between AC and DC.
You will need the following:
• Metal plate or pan
• Paper clip
• Piece of cloth
• Cornstarch
• Potassium iodide (available at a pharmacy)
• 9 volt battery
• 3 insulated wires with the insulation stripped off the ends
• Low voltage bell transformer (available at electronics or hardware stores)
Follow these steps:
1. Soak the piece of cloth well in a thick solution of cornstarch and water mixed with the
potassium iodide.
2. Lay the metal plate or pan with the bottom up. Wring the cloth out and lay it across the
metal plate or pan.
3. Use a wire to connect the negative terminal to one edge of the pan, using an alligator clip
or paper clip.
4. Connect the other wire to the positive end, and then slowly stroke the exposed end across
the cloth. (The electric current frees the iodine from the potassium iodide, making a dark
blue mark.) What pattern do you see? What kind of current are you using? Write your
answers.
Answer: uhhhhhhh what is this for?
Explanation i so confused
what is the mass of modelling clay?
the mass of modelling clay is 500g
Describe the movement of sperm in the female reproductive system. State the different structures that it must pass in order to meet the egg for successful fertilization. plzz help me
Answer:
After a male ejaculates, many sperms move to the upper vagina (via contractions from the vagina) through the cervix and across the length of the uterus, reaching the fallopian tubes. Here they will meet the egg cell ready to be fertilized
Approximately what % of the moons surface is illuminatednon a new-moon day?
Answer: 0%
Explanation: hope this help
Describe the method of obtaining pure drinking water from the sea water with a labelled diagram.
( plzzzz answer correctly )
Answer:
Desalination is a process that takes away mineral components from saline water.
Explanation:
u welcome
What is the atomic number the atom shown?
A. 3
B. 13
C. 14
D. 27
Answer:
13
Explanation:
Brainlest pls
Answer:
B-13
Explanation:
The protons listed in the atom are 13, and the protons are the same number as the atomic number.