Answer:
Explanation:
Average speed is always: ( total distance traveled ) / ( time elapsed )
The time for the walk is +150+%2B+30+%2B+140+=+320+ s
The distance traveled is +160+%2B+210+=+370+ m
( total distance traveled ) / ( time elapsed ) = +370+%2F+320+=+1.156+ m/s
How much GPE is stored when an 80kg astronaut climbs to the top of a 5m high lunar lander? The gravity strength on the moon is 1.6N/kg.
Answer:
The GPE, stored is 640 Joules
Explanation:
The given parameters are;
The given mass of the astronaut, m = 80 kg
The height of the top of the lunar lander to which the astronaut climbs, h = 5 m
The gravity strength on the moon, g = 1.6 N/kg
The Gravitational Potential Energy, GPE, stored is given according to the following equation;
GPE stored = m·g·h
Therefore, by substituting the known values, we have;
GPE Stored = 80 kg × 1.6 N/kg × 5 m = 640 Joules
The GPE, stored = 640 Joules.
How does the energy in the light of the aurora borealis compare to the energy as an excited electron returns to its original energy level?
twice the energy
one-third of the energy
half of the energy
equal to
Answer:
I THINK IS HALF OF THE ENERGY
Explanation:
PLEASE MARK ME AS BRAINLIEST
Answer:
equal to
Explanation:
(Not for cheating,just for help)
How does the energy in the light of the aurora borealis compare to the energy as an excited electron returns to its original energy level?
twice the energy
one-third of the energy
equal to
half of the energy
A car is coasting backwards downhill at a speed of 3.0 m/s when
the driver gets the engine started. After 2.5 sec, the car is
moving
uphill at 4.5 m/s. Assuming that uphill is the positive
direction, what is the car's average acceleration?
If a car is coasting backward downhill at a speed of 3. 0 meters / s when the driver gets the engine started. After 2.5 sec, the car is moving uphill at 4.5 meters / second . Assuming that uphill is the positive direction the average acceleration of the car would be 3.0 meters / second².
What is acceleration?The rate of change of the velocity with respect to time is known as the acceleration of the object. Generally, the unit of acceleration is considered as meter / seconds².
As given in the problem If a car is coasting backward downhill at a speed of 3. 0 meters / s when the driver gets the engine started. After 2.5 sec, the car is moving uphill at 4.5 meters / second .
The average acceleration of the car = + 4.5 - ( - 3 .0) / 2.5
= 3.0 meters / second ²
Thus , the average acceleration of the car would be 3.0 meters / second².
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Mike was driving 30km/hr and slowed to 20km/hr in 10 seconds what is his acceleration? (number only)
Answer:
-0.28 m/s²
Explanation:
acceleration, a = (v - u)/t where u = initial velocity = 30 km/hr = 30 × 1000/3600 = 8.33 m/s and v = final velocity = 20 km/hr = 20 × 1000/3600 = 5.56 m/s and t = time = 10 s.
Substituting the values of the variables into the equation, we have
a = (v - u)/t
= (5.56 m/s - 8.33 m/s)/10 s
= -2.77 m/s ÷ 10 s
= -0.277 m/s²
≅ -0.28 m/s²
Factor the expression 27x-18y
Answer:
9(3x-2y)
Explanation:
27x-18y, the common factor here is 9
9(3x-2y)
What was the problem with the lightbulbs in the study?
A. The lightbulbs were exploding because the current was too high.
B. The lightbulbs were burning out too quickly because the current
was too high.
C. The lightbulbs did not work at all because the current was too low.
D. The lightbulbs were not bright enough because the current was
too low
Answer:
D. The lightbulbs were not bright enough because the current was
too low
Answer:
A. the lightbulbs were exploding because the current was too high.
Explanation:
a p e x
describe how your data supports the statement the rate of movement of dna fragments is inversely proportional to the log of their size in kb
Answer: Is there supposed to be something elses here because this question is unclear.
Explanation:
a body accelerates uniformly from rest at 2m/s square. calculate it's velocity after traveling 9m.
Answer:
6m/s
Explanation:
Given parameters:
Initial velocity = 0m/s
Acceleration = 2m/s²
Distance = 9m
Unknown:
Final velocity = ?
Solution:
To solve this problem, we use the expression below:
v² = u² + 2as
v is the final velocity
u is the initial velocity
a is the acceleration
s is the distance
v² = 0² + (2 x 2 x 9) = 36
v = 6m/s
an electric lamp transfers 500j in 5s what is it’s power
Explanation:
An electric lamp transfers 500j in 5s
So in 1s = 500/5
= 100
So, it's strength is 100j/s
So, 100j in 1s
A rocket of mass 1200kg is travelling at 2000m/s .It fires its engine for 1 min .The forwarded thrust provided by the rocket engines is 10KN (10000 N) .
a)Use the equation of momentum x t to calculate the increase in the momentum of the rocket .
b)use your answer a to calculate the increase in velocity of the rocket and its new velocity after firing the engines .
Answer:it fires its engine for 1 minute. If the forward thrust provided by the rocket engines is 10000 N, what is the increase in ... From this, work out the increase in velocity of the rocket and its new velocity ... You can put this solution on YOUR website! . From Physics (Mechanics), there is this impulse-momentum change equation: ...
Explanation:
Why does a person in a freely falling elevator
feel weightless?
Answer:Earth-orbiting astronauts are weightless for the same reasons that riders of a free-falling amusement park ride or a free-falling elevator are weightless. They are weightless because there is no external contact force pushing or pulling upon their body. In each case, gravity is the only force acting upon their body.
Explanation:
What is the best insulator?
A) copper
B) aluminum
C) a soda can
D) a staple
E) rubber
Answer:
E
Explanation:
All others conduct electricity and heat.
Answer:
E.Rubber
Explanation:
Rubber is the best insulator, they have them coated around electricity wires, while metals are good conductors.
If u could give me brainly that would be awsome-u dont have to tho, HAVE A GREAT DAY!! :))
how far will a body move in 4 seconds if uniformly accelerated from rest at the rate of 2m/s square
Answer:
16m
Explanation:
Given parameters:
Time = 4s
Initial velocity = 0m/s
Acceleration = 2m/s²
Unknown:
How far will the body move = ?
Solution:
To solve this problem, we use the expression below:
s = ut + [tex]\frac{1}{2}[/tex] at²
s is the distance
u is the initial velocity
t is the time
a is the acceleration
s = (0 x 4) + ( [tex]\frac{1}{2}[/tex] x 2 x 4²) = 16m
A 2 kg cart has a momentum of 16 kg m/s. What is its velocity?
Answer:
v = 8 m/s
Explanation:
p = m × v
16 = 2 × v
2v = 16
v = 16/2
v = 8 m/s
The velocity is 8 m/s
The calculation can be done as follows;
Mass= 2kg
momentum= 16 kg
The formula is;
momentum= mass × velocity
16= 2 × v
16= 2v
v= 16/2
v= 8
Hence the velocity is 8m/s
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r
2r
Two objects gravitationally attract with a force of 18.0 N. If the distance between the two
objects' centers is doubled, then the new force of attraction is N.
Answer:
[tex]4.5\ \text{N}[/tex]
Explanation:
[tex]F_1[/tex] = Gravitational force between the objects = [tex]18\ \text{N}[/tex]
[tex]r_1[/tex] = Initial distance between the two objects
[tex]r_2[/tex] = Final distance between the two objects = [tex]2r_1[/tex]
Gravitational force between two objects is given by
[tex]F=\dfrac{Gm_1m_2}{r^2}[/tex]
So
[tex]F\propto \dfrac{1}{r^2}[/tex]
[tex]\dfrac{F_2}{F_1}=\dfrac{r_1^2}{r_2^2}\\\Rightarrow \dfrac{F_2}{F_1}=\dfrac{r_1^2}{(2r_1)^2}\\\Rightarrow \dfrac{F_2}{F_1}=\dfrac{1}{4}\\\Rightarrow F_2=\dfrac{F_1}{4}\\\Rightarrow F_2=\dfrac{18}{4}\\\Rightarrow F_2=4.5\ \text{N}[/tex]
The new force of attraction between the objects is [tex]4.5\ \text{N}[/tex].
*need help asap! on a timer* Please select the word from the list that best fits the definition
Simplified diagram that shows the movement of an object as a series of single points
Answer:
particle model
Explanation:
A particle model is a simplified version of a motion diagram in which the object in motion is replaced by a series of single points.
What is the IMA of the following pulley system?
Answer ideal mechanical advantage
How will the electrostatic force be changed if the distance between two electric charges is tripled?
A) 9 times the original force
B) 3 times the original force
C) 1/9 of the original force
D) 1/3 of the original force
Answer:
How will the electrostatic force be changed if the distance between two electric charges is tripled?
B) 3 times the original force
What is a common criticism of both the Milgram experiment and the Stanford Prison experiment?
A 1100 kg car starts from rest and accelerates for 5 seconds at 4.6m/s/s how much power does the car generate
Answer:
The power expended by the car during the acceleration is 116.38KW
Explanation:
Power is a term that defines the rate at which energy is expended whenever work is done.
Power can be given as Force X velocity.
Force can be found using the formula:
F = mass X acceleration.
In this case,
F = 1100kg X 4.6m/s2
F = 5060 N
The final velocity, v of the car can be obtained from this formula:
v = u+ at
U = initial velocity = 0 (since the car started from rest)
a = acceleration = 4.6m/s2
t = time = 5 seconds
v = 0 + 4.6 X 5 = 23 m/s
Therefore, the power expended is 5060N X 23m/s=116,380W
The power expended by the car during the acceleration is 116.38KW
A car starting from rest accelerates at a rate of 8.0 m/s/s. What is its final speed at the end of 4.0 seconds?
what is the velocity ratio of n inclined plane? Write
Answer:
Answer is on the pic
Explanation:
I hope it's helpful!
State the parallelogram law of vectors
Answer:
If two vectors acting simultaneously on a particle are represented in magnitude and direction by the two adjacent sides of a parallelogram drawn from a point, then their resultant is completely represented in magnitude and direction by the diagonal of that parallelogram drawn from that point.
:-))
Choose the correct answer: A simple pendulum makes 40 oscillations in 200 seconds.
A) 10 seconds
B) 20 seconds
C) 50 seconds
D) 5 seconds
Marissa keeps track of all attendance records for the local preschool. Which
two options are advantages of her keeping the records online?
A. The records are digital, so they do not change during
transmission
B. The records can be transmitted by an analog device without
losing strength of signal.
C. The records can be stored in the cloud, making them accessible
to her from anywhere.
D. The records could be accessed by anybody if no security
programs are provided.
SUBMIT
Answer: C and A
Explanation: a p e x :)
Fllw me on ig (Kyojei)
Recording it in digital, so they do not change during transmission and records can be stored in the cloud, making them accessible to her from anywhere can aids for keeping the records online. The correct options are A and C.
What is digital storage?Digital storage helps in storing large amounts of data in a small amount of space and easily sharing information with anyone else. Digital items are simple to edit, enhance, or crop.
Cloud storage is a data deposit model wherein digital data including such documents, photos, and so on are stored on virtual or cloud servers hosted by external parties.
It enables you to store data on an offsite storage system and access it whenever necessary.
Thus, the correct options are A and C.
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Final Exam
5 seconds after starting from rest, a car is moving at 45 m/s. What is the car's average acceleration?
Time= 5 sec
Initial velocity(u)= 0
Final velocity( v)=45 m\s
Accleration(a)=?
We have,
[tex]a = \frac{v - u}{t} [/tex]
[tex]a = \frac{45 - 0}{5} [/tex]
[tex]a = \frac{45}{5} [/tex]
a=9m\s
When warm air rises, cold air will _____.
sink and be pushed aside
sink and fill in space
be pushed up with it
get colder
Explanation:
sink and fill in space..........
Write a sentence on how these words are used in real life situations
1. Frame of Reference
2. Displacement
3. Average Velocity
4. Instantaneous Velocity
Answer:
they can all be used on motor vehicles or transpostation
Explanation:
Calculate the frequency (v) in Hertz (Hz) of a wave that has a wavelength of 4.71 meters.
Answer:
6.37 x 10⁷Hz
Explanation:
Given parameters:
Wavelength = 4.71m
Unknown:
Frequency = ?
Solution:
To solve this problem, we use the expression below:
V = F∧
V is the velocity = 3 x 10⁸m/s
F is the frequency
∧ is the wavelength
3 x 10⁸ = F x 4.71
F = 63694267.52Hz = 6.37 x 10⁷Hz
If a television draws 9 amperes at
120 volts, at how many watts is it
rated?
Answer:
1080 watts
Explanation:
