Answer:
the mechanical advantage David had when using the pulley is 2.
Explanation:
Given;
load moved by David, L = 350 N
effort applied by David, E = 175 N
The mechanical advantage David had when using the pulley is calculated as;
[tex]M.A = \frac{Load}{Effort} \\\\M.A = \frac{350}{175} \\\\M.A = 2[/tex]
Therefore, the mechanical advantage David had when using the pulley is 2.
If the small piston has an area of .004 square
meters and Bob pushes down on it with 225 N of
force, what is the magnitude of the pressure
increase in the system?
The magnitude of the pressure : P = 56,250 N/m
Further explanationGiven
Area of 0.004 m²
Force 225 N
Required
the magnitude of the pressure
Solution
Pressure = force exerted per unit of surface area(perpendicular)
Can be formulated :
P = F/A
Input the value :
P = 225 N / 0.004 m
P = 56,250 N/m
An object that is slowing down is accelerating.
True
False
Part C
How many combined bits of storage are there on the two tablets?
Answer:
IVE BEEN TRYNA FIND THE ANSWER FOR THE PAST HOUR T-T
Explanation:
Answer:
3.2 x10^11 bits of storage
Explanation:
how do you fix a broken foot
my sister is in literal tears and i dont have a phone and
our parents are out of the house rn
How much heat energy is given out when 500g of steam at 100 degrees celcius condenses to water at 100 degrees celcius
Explanation:
How much thermal energy is released when 500g of steam at 100° C condenses into water and cools to 50°C
Givens: m=0.5 kg
t = 50
c = 2.010
Qtotal = Q1 + Q2
Qtotal = QmcΔt + mLv
Qtotal = (0.5kg)(2.010)(50) + (0.5)(2.3*10^6)
Qtotal = 1.15 * 10^6
The book says that the answer is 1.3*10^6?
What did I do wrong here?
James is planning a science fair project on sound waves. He places an alarm inside a jar which he can remove the
air from. Before he removes the air, he can hear the alarm ringing. After he removes the alr, he cannot hear the
alarm ringing. What condusion can you draw from this experiment?
A. Sound waves can travel in a vacuum
B. Sound waves are transverse waves and are loud
C. Sound waves cannot travel through a medium
D. Sound waves require a medium to travel through
Answer: c
Explanation:
Sound waves cannot travel through a medium
PLEASE HELP ASAP!!!!
Sort the statements based on whether they are correct or incorrect.
All waves have the same
wavelength.
Radio telescopes give us
information about the
birthplace of a star.
If the wavelength of a wave
increases, its frequency
also increases.
Visible light is a kind of
electromagnetic wave.
All objects emit
electromagnetic waves.
Answer: the first is incorrect the second is correct the third is correct
Explanation: the fourth is correct the fifth is incorrect
Which distance increases?
Answer:
wY
Explanation:
it increases my mercury righy basically also on the atmosphere pressure
1
AI
A3
If A1 = 27A and A3 = 1.9A, what would A2 read?
Answer:
0.8A
Explanation:
because im very intelligent and beautiful so the answer is correct and its 0.8A
Horse's Motion
Pamond
25
20
Account
Velocity
(meters per second)
15
10
Dashboard
5
0
Courses
0 5 10 15 20 25
Time (seconds)
Groups
Based on the information in the graph, which statement is
true?
Calendar
The horse maintained a constant acceleration during this portion of the race.
Inbox
The horse maintained a constant velocity during this portion of the race.
The horse increased its acceleration during this portion of the race.
History
The horse decreased its velocity during this portion of the race.
Studio
Answer:
The answer will be the number 15 because it is subtracted to the number itself
Which green shape is the least reactive?
(Subjective is actually science)
Answer:
the green smiley face
Explanation:
its is farthest from the right
and as stated on the chart, the farther left, the more reactive
less stable=more reactive
more stable= less reactive
Student agrees to do only 300 joules of work, how far will the student push the box using a constant 84 N force
Answer:
Explanation:
Work = Force*Distance
300 = 84*d
d = 3.57 meters
A boat travels 90 m in 10 seconds, what is its speed?
90 m/s
9 mi/hr
9 m/s
900 m/s
Answer:
it is 9m/s , hope it helps
If a girl does 1,350 Joules of work to pedal her bike using a force of 75 N, how far did she ride her bike?
Answer:
D = 18m
Explanation:
We use this formula:
Work = Force * Distance
Now, we replace it:
W = F*D
1,350J = 75N * D
D = 1,350/75
D = 18m
Hope it was helpful ;)
a car takes 4 hours to cover a distance if it takes at a speed of 40mph. what should be it's speed to cover the same distance in 1.5 hours
Answer:
Speed = 106.67mph
Explanation:
Let the first motion be A.
Given the following data;
Speed A = 40mph
Time A = 4 hours
To find the distance covered in A;
Distance = speed * time
Distance = 40 * 4
Distance = 160 miles.
To find the speed required to cover the above distance in 1.5 hours;
Speed = distance/time
Speed = 160/1.5
Speed = 106.67mph
What force will accelerate a 20 kg object at 4 m/s 2? *
Answer:
80 N
Explanation:
mass = 20 kg
acceleration = 4 m/s^2
Force = mass * acceleration
= 20 *4
= 80 N
what kind of waves travel as transverse waves
A. Only mechanical
B. All waves
C. Some waves
D. No waves
Answer:
C. Some waves
Explanation:
The answer is some waves because transverse waves are not the only types of waves we have on the earth. We also have longlitudal waves, which means only some waves can only be transverse. The answer to the question should be C. Some waves.
Question 1
3 pts
When eating out in a restaurant, you
should
Answer:
Wear a mask and keep a solid 6 feet of social distance
Explanation:
Answer:
Be polite, wear a mask, social distance, don't eat sloppy, have a good time lol
Explanation:
how much potential energy does the ball have when it reaches the top of its ascent
PE = 450 m
Further explanationGiven
The initial problem might be like this
A 1.0-kg ball is thrown into the air with an initial velocity of 30 m/s.
Required
Potential energy
Solution
h max = vo²sin²θ/2g
h max = 30²sin²90/2.10
h max = 45 m
PE = m.g.h
PE = 1 x 10 x 45
PE = 450 m
V,? = V2 + 2a Ax
1. A toy car increases velocity over a displacement of 15.2 m. If
the car starts at rest and has a final velocity of 0.76 m/s, what
is the magnitude of its acceleration?
Answer:
Explanation:
[tex]V^2=V^2_i+2a(x_f-x_i)[/tex]
[tex]0.76^2=0^2+2a(15.2)[/tex]
[tex]0.5776=30.4a[/tex]
[tex]a=0.019m/s^2[/tex]
what are the laws of motion
mary travelled 70mph due north
this is an example of
Acceleration
distance
speed
velocity
Two lasers are shining on a double slit, with slit separation d. Laser 1 has a wavelength of d/20, whereas laser 2 has a wavelength of d/15. The lasers produce separate interference patterns on a screen a distance 4.60 mm away from the slits.
A) Which laser has its first maximum closer to the central maximum?
B) What is the distance between the first maxima (on the same side of the central maximum) of the two patterns?
Answer:
A. Laser 1 has its first maximum closer to the central maximum.
B. 0.077 mm
Explanation:
A) Which laser has its first maximum closer to the central maximum?
Since for a double slit interference, sinθ = mλ/d where θ is the angle between the central axis and the maximum point, m = order of fringe, λ = wavelength of light and d = width of slit.
Also tanθ = y/D where θ is the angle between the central axis and the maximum point, y = distance between maximum point and central axis and D = distance between slit and screen = 4.60 mm.
Since θ is small, sinθ ≅ θ and tanθ ≅ θ
So, sinθ ≅ tanθ
mλ/d = y/D
So, y = mλD/d for the first maximum, m = 1.
So, y = (1)λD/d
y = λD/d
For the Laser 1, λ = d/20
So, y = λD/d
y = (d/20)D/d
y = D/20
y = 4.60 mm/20
y = 0.23 mm
For the Laser 2, λ' = d/15
So, y' = λ'D/d
y' = (d/15)D/d
y' = D/15
y' = 4.60 mm/15
y' = 0.307 mm
Since y = 0.23 mm < y' = 0.307 mm, Laser 1 has its first maximum closer to the central maximum.
B) What is the distance between the first maxima (on the same side of the central maximum) of the two patterns?
The distance between the first maxima (on the same side of the central maximum) of the two patterns is Δy = y' - y = 0.307 mm - 0.23 mm = 0.077 mm
How much does a crate weigh (force) if it is 0.25 meters wide and 1.5 meters long and it
exerts 800 pascals of pressure on the ground when it lands?
Force of a crate : 300 N
Further explanationGiven
0.25 meters wide and 1.5 meters long
Pressure = 800 Pa
Required
Force
Solution
P = F/A
A = 0.25 x 1.5
A = 0.375 m²
P = 800 Pa = 800 N/m²
Input the value :
F = P x A
F = 800 N/m² x 0.375 m²
F = 300 N
Think about a situation at school where you or someone you know
has demonstrated grit. Describe the situation. Pls help me
Answer:
to have courage and show the strength of your character. ... A person with true grit has passion and perseverance. Goals are set and followed through.
Explanation:
for example: i had the passion and the courage to finish my school work and chores for i can go out with my friends and to get out of the house for a bit and have fun so i had the courage to finish chores from the house and do some schoolwork for i can finish ad hang out with some friends. so i had the strength to finish everything because i didn't want to be doing school work and chores any more so i had the passion to finish up quickly
What is the centripetal acceleration of an object moving 25 m/s around a 6 m curve?
O 104.2
O 84.2
O 64.2.
O 44.2
Answer:
Centripetal acceleration = 104.2 (Approx)
Explanation:
Find:
Centripetal acceleration
Given:
Velocity = 25 m/s
Radius r =6 m
Computation:
Centripetal acceleration = v² / r
Centripetal acceleration = 25² / 6
Centripetal acceleration = 104.467
Centripetal acceleration = 104.2 (Approx)
As the Sun ages, what will happen to life here on Earth? Why?
Answer:
As the Sun ages it will enter another stage of stellar evolution where it's atmosphere begins to inflate.As the Sun heats up and expands, life on Earth will become increasingly difficult. Long before the Sun becomes a red giant some 4 or 5 billion years from now, our planet will be rendered uninhabitable.
~I HOPE IT HELPS♡
how find \empirical formula
Please Help Fast Select the correct answer. Which equation correctly relates kinetic energy, mass, and velocity? A. B. C. D.
Answer:
KE = 1/2 m v^2
Explanation:
When there are too many neutrons compared to the number of protons, the atomic nucleus is
A. Stable
B. Unstable
C. Explosive
D . Noble gases
Answer:
99.9% sure it B. Unstable but if that’s wrong try A.stable
Explanation:
Too many protons (or too few neutrons) in the nucleus result in an imbalance between forces, which leads to nuclear instability.
if a nucleus is unstable due to too many neutrons, it will undergo Beta decay - this means they become stable by emitting a beta particle.