Answer:
t = 8.94 s
Explanation:
We will use the second equation of motion to calculate the time taken by the cart:
[tex]s = v_it + \frac{1}{2} at^2[/tex]
where,
s = distance = 200 m
vi = initial speed = 0 m/s
t = time taken = ?
a = acceleration = 5 m/s²
Therefore,
[tex]200\ m = (0\ m/s)(t)+\frac{1}{2}(5\ m/s^2)t^2\\\\t^2 = \frac{(200\ m)(2)}{5\ m/s^2}\\\\t = \sqrt{80\ s^s}[/tex]
t = 8.94 s
HELP ME ASAP I WILL MARK YOU THE BRAINLIEST NO LINKS
Answer:
rolling friction is the lady in the forest
static friction is the man pushing the fridge
sliding friction is the snow kid
and fluid fraction is the bird I'm pretty sure
television set changes electrical energy to sound and light energy. In this process, some energy is *
Answer :light
Explanation:
A television set is another device that operates by the transformation of energy. An electrical beam from the back of the television tube strikes a thin layer of chemicals on the television screen, causing them to glow. In this case, electrical energy is converted into light.
What is the temperature difference between 65 degree Celcius and 212 degree Farenheit.
Find the temperature difference in both Celcius and Farenheit scale.
Answer:
65 deg C = 35 deg C below boiling
35 deg C = 35 * 9 deg F / 5 deg c = 63 below boiling deg F
(1 deg C = 9/5 deg F)
212 - 63 = 149
So 65 deg C = 149 deg F
Not sure exactly what's wanted, but
212 deg F = boiling
65 deg C = 149 deg F
Check: 65 * 9/5 + 32 = 149 as found above
Answer:
65 deg C = 35 deg C below boiling
35 deg C = 35 * 9 deg F / 5 deg c = 63 below boiling deg F
(1 deg C = 9/5 deg F)
212 - 63 = 149
So 65 deg C = 149 deg F
Not sure exactly what's wanted, but
212 deg F = boiling
65 deg C = 149 deg F
Check: 65 * 9/5 + 32 = 149 as found above
Explanation:
Sound waves require a medium to travel. *
True
False
Answer:
false
Explanation:
Answer:
true
Explanation:
Space is not a medium. and we can not her anything in space. therefore you need a medium in order to hear sound waves.
I have no idea so i'm screwed please help me
Beryllium-11 has a half-life of 13.81 s. What percent of the initial sample will remain aft er 30.0 s?
Answer:
Let N0 be the initial atoms of Be11
N0 / 2^1 = N0 / 2 Number of Be11 after 1 half-life
N0 / 2^2 = N0/ 4 Number of Be11 after 2 half-lives
30/13.81 = 2.17 half lives
N0 / 2^2.17 = N0 / 4.51 = .222 N0 or 22.2 % of atoms remain
The percentage of the initial sample that will remain after 30.0 s is 22.2 % of atoms remain.
What is half-life?A half of existence is the duration required for something to reduce in size by half. The phrase is most frequently used in reference to radioactive decay, which takes place as unstable atomic particles weaken. There are 29 known factors that can operate in this way.
Every chemical has a unique half-life. Since carbon-10, for instance, has a half-life of only 19 seconds, it is impossible for this isotope to be found in nature.
Let No of the initial atoms of Beryllium-11
No / 2¹ = N0 / 2 Number of Be11 after 1 half-life
No / 2² = N0/ 4 Number of Be11 after 2 half-lives
30 / 13.81 = 2.17 half lives
No / 2²·¹⁷ = N0 / 4.51 = .222 N0 or 22.2 % of atoms remain
Therefore, the percentage of the initial sample will remain after 30.0 s is 22.2 %.
To learn more about half-life, refer to the link:
https://brainly.com/question/16387602
#SPJ2
The force of ____________ exists between any two objects that have mass.
free fall
acceleration
weight
gravity
Answer:
gravity
Explanation:
Please help me to solve this, I don’t really know what to do.
A device requires 5 amps to operate properly.
What total resistance is needed in order to obtain 5 amps when 110 volts is applied across a circuit?
If the device has a resistance of 8 ohms, what additional resistor needs to be added to the circuit and how should the resistor and device be hooked up?
Explanation:
Use Ohm's Law
V / R = I
I = 5A
V = 110V
R =?
Solve for R
if you need further help let me know
pls how do i do this my grades are due today:(! i have to pass this class
Answer:
B, A, E, D, C
Explanation:
If the arrow points to the right, then the force is positive.
If the arrow points to the left, then the force is negative.
Also, remember that the force does not relate (necessarily) to the mass, so the different blocks having different masses is not an important factor in this problem.
Let's find the force in each block.
A)
Here we have a positive force of 3N and a negative force of 1N
Then the net force (the sum of all the forces) is:
F = 3N - 1N = 2N
B)
Here we have two positive forces, one of 1N and other that I cant see, I guess that it is 3N
Then the net force is:
F = 1N + 3N = 4N
C)
Here we have two negative forces of 2N
Then the net force is:
F = - 2N + ( - 2N) = -4N
D)
Here we have a single force of 2N that is negative, then the net force is:
F = -2N
E)
Here we have a negative force of 3N and a positive force of 2N
then the net force is:
F = -3N + 2N = -1N
Then, the order of greatest to least (from positive to negative) is:
B, A, E, D, C
Astronomical observatories have been available since ancient times, and many cultures set aside special sites for astronomical observations. The thing modern observatories have that was missing from these older observatories until about 1610 was __________________. Group of answer choices
Answer:
The answer is "telescopes".
Explanation:
Throughout ancient times, astronomical observatories have indeed been available, and so many historical locations were reserved for astronomical observations. All contemporary astronomers lacked within those older telescopes were lenses until 1610. A telescope is indeed an instrument used to view far-off objects. Telescopes often are being used to look at planets and stars.
What are some core features of waves in physics?
Answer:
Waves are disorders that travel through a fluid medium. Several simple wave features include frequency, period, wavelength, and amplitude.
Explanation:
Select the correct answer.
What does the number, or density, of field lines on a source charge indicate?
O A.
direction of charge on the source charge
OB.
amount of charge on the test charge
O c.
amount of charge on the source charge
OD.
direction of charge on the test charge
Reset
Next
Answer:
amount of charge on the source charge
A ticker timer makes 50 dots per second. When a body is pulled by a tap through the timer, the distance between the third and fourth dot is 3cm and the distance between the fourth and fifth dot is 4cm.what was the acceleration of the body?
Answer:
The acceleration is 1 cm/s^2.
Explanation:
The acceleration is defined as the rate of change of velocity.
Here, initial velocity, u = 3/1 = 3 cm/s
final velocity, v = 4/1 = 4 cm/s
time, t = 1 s
Let the acceleration is a.
Use first equation of motion
v = u + at
4 = 3 + 1 x a
a = 1 cm/s^2
I really need help.
yeah i did, hope you understand
I Need help please.
Answer:
5.83
Explanation:
Divide the distance by velocity
What happens when magma moves the tectonic plates and pressure builds up
The amount of water in rivers and lakes is always changing due to inflows and outflows. Based on the information in this passage and the diagram, what are these inflows and outflows part of?
A: the evaporation process
B: the water cycle
C: the precipitation process
D: human-controlled systems
Answer:
B. Water Cycle
Explanation:
A car is traveling at a speed of 20m/s and has a mass of 1200kg how much kinetic energy does it have
Answer:
Explanation:
The formula for Kinetic Energy is
[tex]KE=\frac{1}{2}mv^2[/tex]. Filling in:
[tex]KE=\frac{1}{2}(1200)(20)^2[/tex] It looks like we only need 1 significant digit here but I'll give you 2 and you can round how you want.
KE = 2.4 × 10⁵ J
a wire is carrying a 2.45 A current. at what distance from the wire is the magnetic field 1.00x10^-6t
Answer:
0.49m
Explanation:
So you need to change the original equation for finding fields to find distance, and then just plug in the numbers
Which equals 0.49meters
Also it was right on Acellus :)
Hope this helps
Gravity is not considered matter.
A. True
B. False
Answer:
false gravity is not considered matter
plsss helpp i really need this now thank u ❤️
Answer:
10.
parabolic
11.
Entirely horizontal
12.
45°
A physical science test book has a mass of 2.2 kg what is the weight on the earth
Answer:
21.582 Newtons
Explanation:
The weight of an object on Earth is equal to W=9.81M where M is the mass of the object and the acceleration due to gravity is 9.81 m/s^2. Therefore, the weight of the book on the earth is W=9.81(2.2)=21.582N, or 21.582 Newtons
Can someone please help me with this its worth all the points i have left
Answer:
1. Yes
2. Yes
3. 292 joules
4. 90 watts
5. By increasing the force
Explanation:
Have a wonderful day :)
plss plss plss help ASAP. thank u
Answer:
13. (A) 20°
14. (D) 65°
15. (A) 0 m/s
As thermal energy is added to a sample of water, the kinetic energy of its
molecules increases, but the particles remain close together. Which part of
the heating curve illustrates this process?
Answer:
B
Explanation:
Answer:
B. C
Explanation:
took the test :V
EASY BRAINLIEST PLEASE HELP!!
-if you answer correctly ill give you brainliest which will give you 90pts-
(if you put links or don't answer accordingly im reporting your account)
Explain how a compass can get you out of the woods if you are lost.
Answer:
Explanation:
A compass always (or usually always) points to the magnetic north. If you came in from the south east and got lost, it will point north and you can adjust the way you travel by going 90 off of where the compass points. Keep walking on that line until you hit a place that you recognize and there is no more need for the compass.
Answer: The first thing you have to do is locate east on your compass housing. Turn your compass until you see that east lines up directly with your direction of travel arrow. Quite simply, that is the direction you want to walk. You can do this for any direction.
Explanation:
What would make oppositely charged objects attract each other more?
increasing the positive charge of the positively charged object and increasing the negative charge of the
negatively charged object
decreasing the positive charge of the positively charged object and decreasing the negative charge of the
negatively charged object
increasing the distance between the positively charged object and the negatively charged object
maintaining the distance
tance between the positively charged object and the negatively charged object
Hurry I need answers quick I’m timed
Answer:
A). Increasing the positive charge of the positively charged object and increasing the negative charge of the negatively charged object.
Explanation:
The two objects possessing opposite or unlike charges attract one another due to the electromagnetic force between the electrons, as well as, protons in order to develop ionic lattices.
As per the question, the objects having unlike charges would attract one another more when we 'escalate the positive charge of the object having a positive charge and enhance the negative charge of the object possessing negative charge.' This will lead the atoms that are losing electrons to be positively(+ve) charged and the atoms gaining electrons to be negatively
(-ve) charged. Thus, the electromagnetic force among them increases and a stronger ionic network develops leading them to attract each other more. Hence, option A is the correct answer.
Answer:
The person above me is wrong the answer is actually B
Explanation:
I put his/her answer and got it wrong and it showed me theat the answer is b not a
How far will a brick starting from rest fall freely in 3 seconds
Answer:
When object falls freely we can say
its initial speed will be ZERO
and its acceleration due to gravity must be
a = g = 9.8 m/s^2a=g=9.8m/s2
Now we need to find the distance of free fall in 3 s of time
So here we will use kinematics
y = v* t + \frac{1}{2} at^2y=v∗t+21at2
now we will plug in all values in it
y = 0 + \frac{1}{2}* 9.8 * 3^2y=0+21∗9.8∗32
y = 44.1 my=44.1m
So it will fall by total distance of 44.1 m
There are six important things to keep in mind on your fitness journey. Please list and define at least four of the things we should remember.
What is meant by denser medium?
Explanation:
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Calculate their speed between points A and B. Include the units.
What was their average speed for this ride? Include the units.
= Total Distance/Total time
= 30/3
= 10 km/h
Average speed for this rideAverage speed = Total distance travelled/time taken
= 50/6
= 8.3 km/h