These data tables show the distance of various galaxies from Earth in millions of light-years (Mly) at different times. Which table supports the theory of expansion in the formation of the universe?
Answers
Answer: it’s b
Explanation:
I had two attempts to do the test first I picked c but I did it again it’s b .
Related Questions
Just like other scientists and philosophers of his time, Archimedes believed the secrets of the universe could be revealed by thinking alone. *
True!
False!
Answers
A sound wave traveling through dry air has a frequency of 16 Hz, a wavelength of 22 m, and a speed of 350 m/s. When the sound wave passes through a cloud of nitrous oxide, its wavelength changes to 16 m, while its frequency remains the same. What is its new speed? (The equation for the speed of a wave is v= f x 1.)
A. 350 m/s
B. 16 m/s
C. 5,600 m/s
D. 256 m/s
It's D
Answers
Answer:
D. 256 m/s
Explanation:
[tex]f[/tex] = Frequency of the wave = [tex]16\ \text{Hz}[/tex]
[tex]\lambda[/tex] = Wavelength = [tex]16\ \text{m}[/tex]
Speed of a wave is given by
[tex]v=f\lambda[/tex]
[tex]\Rightarrow v=16\times 16[/tex]
[tex]\Rightarrow v=256\ \text{m/s}[/tex]
The speed of the wave as it passes through the cloud of nitrous oxide is [tex]256\ \text{m/s}[/tex].
Answer:
D. 256 m/s
Explanation:
d. d as in dog
4. Priyanshi Is Writing Some Statements But She is Confused To Know Whether The Statements
Are Correct Or Not? Which answer do you think is correct?
[A] We cannot see anything through an opaque object.
[B] Those materials which do not allow any light to pass through them are called opaque
materials.
[C] If we cannot see through an object at all, it is not allowing any light to pass through it and
Answers
Answer:
i think the answre is C but the option is not complete !
Answer:
we cannot see anything through an opaque object
A gas station is charging $1.29 per gallon of gas. What would be the price for a liter of gas?
Answers
Answer: $0.343/liter
Explanation: $1.29/gallon x 1 gallon/3.78541 liters = $0.343/liter
Saeed moves 50 m east then 65 m south to reach the garden. What is the displacement of Saeed?
Answers
Answer:
82.01m
Explanation:
Using the formula:
R^2=A^2+B^2
R= √ A^2+B^2
Where R= displacement
A=50m
B=65m
R= √ 50^2+65^2
R= √ 2500+4225
R= √ 6725
R=82.01m
helpp pls .. Which statement is true about the process shown?
Answers
Answer:
I think its A
Explanation:
Solar energy and hydroelectric energy are important sources of energy. Find out more about either one of these forms of energy. What is being done to make it a more efficient source of energy, and where it is being used in the United States?
Answers
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
Daniel steps on the gas pedal of his car, and the engine increases its performance from zero to
2700 rpms (rotations per minute). What are the frequency and period?
(Hint: frequency is cycles per second.]
Answers
Answer
The frequency and the period are 45 cycles/second and 0.023 seconds
Explanation:
The frequency of the engine is given by :
[tex]f=\dfrac{rpm}{60}[/tex]
We have, the engine increases its performance from zero to 2700 rpms.
Frequency,
[tex]f=\dfrac{2700}{60}\ \text{cycles per second}\\\\f=45\ \text{cycles per second}[/tex]
The time period of the engine is given by :
T = f/f
So,
[tex]T=\dfrac{1}{45}\ s\\\\T=0.023\ s[/tex]
Hence, the required frequency and the period are 45 cycles/second and 0.023 seconds respectively.
change 200km/hr into m/sec
Answers
Answer:
200km/hr=55.55m/sec
Explanation:
200km/1hr×1000m/1km×1hr/3600sec=200,000/36000
5. How fast does a 50 gram arrow need to travel to have 40 Joules of kinetic energy?
Answers
Answer: v = 40 m/5
Explanation:
40 J = 1/2 (105) v^2
1600 = v^2
v = 40 m/5
The velocity of the arrow weighing 50 g or 0.05 Kg to have a kinetic energy of 40 joules is 40 m/s.
What is kinetic energy?Kinetic energy is the energy generated in a body by virtue of the motion of the body. It is dependent on the mass and velocity of the body by the relation written below:
Ke = 1/2 mv²
Given the mass of the arrow = 50 g = 0. 05 kg
kinetic energy = 40 J
Thus velocity of the arrow = √(2 Ke / m)
= √(2 × 40 J / 0.05 Kg)
= 40 m/s .
Therefore, the velocity of the arrow will be 40 m/s
To find more on kinetic energy, refer here:
https://brainly.com/question/26590527
#SPJ2
A penny is dropped off the top of the Stratosphere from rest and falls freely with the
acceleration due to gravity (9.81 m/s2). After 5 seconds, how far has it fallen (Ax)?
Answers
Answer:
S = 122.5m
Explanation:
Given the following data;
Acceleration due to gravity = 9.8m/s²
Time, t = 5 seconds
Since it's a free fall, initial velocity, u = 0
To find the displacement, we would use the second equation of motion given by the formula;
[tex] S = ut + \frac {1}{2}at^{2}[/tex]
Where;
S represents the displacement or height measured in meters. u represents the initial velocity measured in meters per seconds. t represents the time measured in seconds. a represents acceleration measured in meters per seconds square.Substituting into the equation, we have;
[tex] S = 0*5 + \frac {1}{2}*(9.8)*5^{2}[/tex]
[tex] S = 0 + 4.9*25[/tex]
S = 122.5m.
Help!
In a school zone, speeding fines?
A. are the same.
B. are doubled.
C. are tripled.
Answers
Which three statements about gravity and the formation of the solar system
are true?
A. Gravity pulled most of the matter into the center of the solar
system.
B. Gravity caused the planets and Sun to have spherical shapes.
O C. Gravity held the pieces of forming planets together.
D. Gravity evenly distributed matter throughout the solar system.
Answers
Answer:
it's answer is B
A planet is round because of gravity. A planet's gravity pulls equally from all sides. Gravity pulls from the centre to the edges like the spokes of a bicycle wheel. This makes the overall shape of a planet a sphere, which is a three -dimensional circle
Hope it helps you
Two bodies of mass m₁ & m₂ are moving with the same velocity 'v' K.E. will be greater for??
Answers
Answer:
the one with a higher mass
Explanation:
The body with more mass will have the greater kinetic energy of the two.
Kinetic energy is the energy due to the motion of body. It is mathematically expressed as:
K.E = [tex]\frac{1}{2}[/tex] m v²
m is the mass
v is the velocity
Since the velocity of the two bodies are the same, and mass is directly proportional to kinetic energy, the body with more mass will have a higher kinetic energy.
So between mass m1 and mass m2, the one with a greater mass will have a higher kinetic energy
What is the main idea of this text of "Phillis Wheatley"
Answers
Answer:
The main idea of the text is to tell you how Phillis wheatley grew up and what the person life was like
5. Susan exerted 400 newtons of force while pushing on a huge boulder. The boulder moved 0 meters. Calculate work.
Answers
Answer:
0 J
Explanation:
Work is the product of force and distance in the direction of force.
The formula is ; Work = Force * Distance
Given that :
Force = 400 N
Distance = 0 meters
Work = 400 * 0 = 0 J
No work was done because the boulder did not move.
What kind of waves occur when the motion of the medium is parallel the the wave direction
Answers
Answer:
A longitudinal wave is a wave in which particles of the medium move in a direction parallel to the direction that the wave moves.
Explanation:
hope this helped
A 10 kilogram radio controlled airplane at 1000 meters has 100,000
joules of potential energy, and moving at 10 meters per second it has 500
joules of kinetic energy. How much mechanical energy does the radio
controlled airplane have? Include units in your answer but no decimal
point or digits to the right of the decimal point. *
Answers
Answer:
The mechanical energy of the airplane is 100,500 joules
Explanation:
The given parameters are;
The mass of the airplane = 10 kg
The height at which the airplane is located = 1000 meters
The potential energy of the airplane, P.E. = 100,000 joules
The speed of the airplane = 10 m/s
The kinetic energy of the airplane, K.E. = 500 joules
The Mechanical Energy, M.E. = The Potential Energy, P.E. + The Kinetic Energy, K.E.
M.E. = P.E. + K.E.
∴ M.E. = 100,000 joules + 500 joules = 100,500 joules
The mechanical energy of the airplane, M.E. = 100,500 joules.
A wooden block has a mass of 12 kg and is experiencing a force of 6 N. Calculate the acceleration that the wooden block will experience. Give your answer to ONE DECIMAL PLACE.
Answers
f = m•a
a = f/m
a = 6N / 12 kg
a = 0.5 m/s
therefore the block is experiencing an acceleration of 0.5 m/s.
The pressure of a liquid at the 10.2 meters depth is 80100 Pascal. - What is the density of the fluid in kg/cubic meter?
Answers
Answer:
8165.138kg/cubic meter
Explanation:
Pressure= 80100 Pascal.= 1N/m^2
Height=10.2 meters
density of the fluid in kg/cubic meter= ?
g=acceleration due to gravity= 9.81m/s^2
The pressure of a system can be calculated using the expression below
P = ρ g h
Where
p =pressure,
h =depth of the liquid,
ρ = density of the liquid,
g = acceleration due to gravity.
If we substitute those values we have
80100 1N/m^2= ρ × 9.81m/s^2
ρ= 80100/9.81
ρ=8165.138kg/cubic meter
Hence, the density of the fluid in kg/cubic meter is 8165.138kg/cubic meter
This type of bike tire is thinner, lighter, more expensive, and punctures easily.
Answers
why mole is called fundamental unit.
Answers
Explanation:
because it doesn't depend upon other unit like kg meter and second
Which one!!!!!!!!!!!!
Answers
Answer:
3N to the right
Explanation:
Increasing the number of loops in a electromagnet or solenoid will cause it to be stronger
True or false?
Answers
The electromagnet will become stronger if we add more coils because there are more field lines in a loop then there is in a straight piece of wire. In a solenoid there are a lot of loops and they are concentrated in the middle, as more loops are added the field lines get larger, therefore making the electromagnet stronger.
Which term describes this diagram
A. food web
B.trophic level
C. Food chain
D. Matter cycle
Answers
Answer:
the answer is letter; C
Explanation:
Describe the disadvantages and advantages of using this element for dating.
Answers
Answer:Each method of dating has constraints around its use and effectiveness. Not all methods are well-suited for each situation – and sometimes it is just not possible to use a particular dating method.
Examples of some of the constraints of using a dating method include:
the size of the sample
the type of sample
contamination of the sample
the type of associated geo-archaeological materials
the need to minimise destructive testing
the chronologies involved
Explanation:
If a device uses mains electricity at 230v and has a 13a fuse in the plug wht is the maximmum power it can safley use?
Answers
Answer:
2990W
Explanation:
Given parameters:
Voltage = 230V
Current = 13A
Unknown:
Maximum power it can safely use = ?
Solution:
To solve this problem;
Power = Current x Voltage
Power = 230 x 13 = 2990W
A ferris wheel with radius r rotates freely about its central
point with initial angular speed wi. A cart on the end
moves at linear speed 2v.
Suddenly, the ride deaccelerates so the cart moves with
speed v. The final angular speed is Of.
How does the angular speed of the ferris wheel
change?
Choose 1 answer:
Answers
Answer:
decreases by 2
Explanation:
The angular speed of the ferris wheel decreased by a factor of 2.
Angular speedThe angular speed of an object is the rate of change of angular displacement with time.
Relationship between angular speed and linear speedv = ωr
[tex]r = \frac{\omega }{v} \\\\\frac{\omega_1 }{v_1} = \frac{\omega_2 }{v_2} \\\\\omega_2 = \frac{\omega _1 v_2}{v_1} \\\\\omega _2 = \frac{\omega _i \times v}{2v} \\\\\omega _2 = \frac{1}{2} (\omega _1)[/tex]
Thus, the angular speed of the ferris wheel decreased by a factor of 2.
Learn more about angular speed here: https://brainly.com/question/6860269
Plz help me
A negative charge of-3.0Cand a lositive charge of 3.0 Care separated by 1m, What is the force between the two
charges?
A negative charge of -0,5 Cexerts a repelling force of 10.0 N on a second charge that is 0.5m away. What is the sign
and magnitude of the second charge?
R21
Answers
Answer:
sign of the other charge is -ve
To remove a nut from an old rusty bolt, you apply a 100-N force to the
end of a wrench perpendicular to the wrench handle. The distance from
the applied force to the axis of the bolt is 25 cm. What is the torque
exerted on the bolt in N-m?
Answers
Answer:
yes its 25cmjdj8dnen8dnejdid