4. A car slows down from 36 km.h to stop in 25 s. 4.1 Define "acceleration”. 4.2 Convert 36 km:h-' to m's-1.
1. Acceleration is the change in velocity of an object per unit time.
2. 36 km/h
= 36000 m/60×60 s
= 36000 m/3600 s
= 10 m/s
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Closure: Jenga's Pizza Delivery
A pizza delivery guy will travel 17km to the first house, 13km to the second house, 137km to the 3rd
house. Would he want to get paid by KM of distance traveled or kilometer of displacement
traveled? “He would want to be paid by..."
Answer:
distance traveled
Explanation:
Assuming he ends where he started, his displacement is zero, while his distance traveled is 17 +13 +137 = 167 km. He would want to be paid by distance traveled.
an energy transformation flow diagram is shown what type of energy does X most likely represent
X represent the wind energy that converted to electrical energy
Báo cáo thực hành
Bài 1: Sóng trên dây: https://phet.colorado.edu/vi/simulation/wave-on-a-string
Bài 2: Cầu cân bằng: https://phet.colorado.edu/sims/html/circuit-construction-kit-dc-virtual-lab/latest/circuit-construction-kit-dc-virtual-lab_vi.html
Answer:
which language is this
Explanation:
A submarine deep underwater releases a bubble of air. The total pressure at this depth is P. The bubble has diameter, D, and absolute temperature, T. As the bubble rises, it expands. When it reaches a certain smaller depth, where the total pressure is 0.22P, it has absolute temperature 1.17. In terms of D, what is the diameter of the bubble at this depth? You may assume that no air leaves the bubble, and that the air behaves as an ideal gas.
Answer:
P V = n R T ideal gas equation
P2 V2 / P1 V1 = T2 / T1
V2 / V1 = T2 / T1 * P1 / P2 = T2 P1 / (T1 P2)
V2 / V1 = (1.17 T1) / T1 * (P1 / .22 P1) assuming absolute temp as 1.17 P1
V2 / V1 = 1.17 / .22 = 5.32
V = 4/3 pi R^3 = 4/3 pi (D/2)^3 = 4/3 pi D^3 / 8 = pi D^3 / 6
V2 / V1 = D2^3 / D1^3
D2 = (V2 / V1 * D1^3)^1/3
D2 = 5.32^1/3 * D = 1.75 D (D1 = D)
In a model of the solar system that was about as large as a college campus how large would the Sun be?
About the size of a basketball.
About the size of a marble.
About the size of a softball.
About the size of a small car
If Scobie could drive a Jetson's flying car at a constant speed of 160.0 km/hr across oceans and space, approximately how long would Scoobie take to drive around Earth's equator in days
Scobie will take 10 days to drive around Earth's equator.
To calculate the time that takes Scobie to drive around Earth's equator we need to find the distance, which is given by the equation of a circumference:
[tex] d = 2\pi r [/tex]
Where:
r: is the Earth's radius = 6371 km
Then, the distance is:
[tex] d = 2\pi r = 2\pi*6371 km = 40030.2 km [/tex]
Now, if we divide the above distance by the speed of the car we can find the time:
[tex] t = \frac{d}{v} = \frac{40030.2 km}{160.0 km/h} = 250.2 h*\frac{1 d}{24 h} = 10 d [/tex]
Therefore, Scobie will take 10 days to drive around Earth's equator.
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Estimate the magnitude of the electric field due to the proton in a hydrogen atom at a distance of 5.29 x 10-11 m, the expected position of the electron in the atom.
a) 1012 N/C
b) 10-11 NIC
c) 106 N/C
d) 1014 N/C
e) 108 N/C
The magnitude of the electric field due to the proton in a hydrogen atom at a distance of 5.29 x 10-11 m, the expected position of the electron in the atom will be a) 1012 N/C
What is electric field due to a charge ?Electric field is defined as the electric force per unit charge. The direction of the field is taken to be the direction of the force it would exert on a positive test charge.
electric field = k * q / r^2
given
distance (r) = 5.29 x 10-11 m
q of proton = + 1.602 * 10 ^ -19 C
k = 9 * 10 ^9 Nm^2 / C^2
Electric field = (9 * 10 ^9 Nm^2 / C^2 * 1.602 * 10 ^ -19 C )/ (5.29 x 10-11 m)^2
= 14.418 * 10 ^ (-10) / 27.98 * 10 ^ (-22)
= 0.5153 * 10 ^12 N/C
correct option a) 1012 N/C
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2 Examples of Gravitational Potential Energy
Answer:
Examples of items with gravitational potential energy include:
A raised weight
Water that is behind a dam
A car that is parked at the top of a hill
A yoyo before it is released
River water at the top of a waterfall
A book on a table before it falls
A child at the top of a slide
Ripe fruit before it falls
I hope this help you! If it help pls mark me brainlest!
plz help me with this question
Explanation:
Here,
initial velocity(u)=25m/s
final velocity (v)=0m/s
time taken(t)= 5 second
Now,
Pls help me how to find absolute uncertainties in (M+m)
Answer:
m uncertainty percentage :
+- 2.5
+- 7.5
+- 12 5
+- 17.5
+- 25
+- 30
M uncertainty percentage = 16.5
m + M uncertainty percentage;
+- 19
+- 24
+- 29
+-34
+- 41.5
+- 46.5
ex 50 × 5 ÷100 = 2.5
a 24kg remote control car travels 7 meters in 3 seconds. calculate the car's momentum
Answer:
Explanation:
ASSUMING that velocity is constant during the 3 seconds,
or that we are satisfied with AVERAGE momentum
p = mv = 24(7/3) = 56 kg•m/s
what conditions might a cause scientist to modify or revise a hypothesis
Answer:
scientists might modify or revise a hypothesis after a trial run that didn't go how they thought.
What is the kinetic energy of a 0.5 kg soccer ball that is traveling at a
velocity of 3 m/s?
What’s the answer
Answer:
kinetic energy = 1/2mv²
k.E =1/2 X 0.5 X 3²
k.e = 9/4
K.E = 2.25j
If Scoobie could drive a Jetson's flying car at a constant speed of 160.0 km/hr across oceans and space, approximately how long would Scoobie take to drive around Earth's equator in days
Yo someone help me on dis jawnt rq plzzz!
Answer:
the answer is 45.6 kg = 45600 g
what is work - energy theorem ??
The work-energy theorem explains the idea that the net work - the total work done by all the forces combined - done on an object is equal to the change in the kinetic energy of the object. After the net force is removed (no more work is being done) the object's total energy is altered as a result of the work that was done.
This idea is expressed in the following equation:
is the total work done
is the change in kinetic energy
is the final kinetic energy
is the initial kinetic energy
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For a company to develop an effective customer-centric culture, there is always room for:
A. Larger product research and development investment
B. Improvement
C. More customers
D. More accurate market research
how far will a rubber ball fall in 10 seconds
what would be the final velocity of this and what would be the average velocity
Answer:
490 meters
Explanation:
hope this helps!
What topic name does this equation go into in physics?[tex]A_{x} = A cos\theta[/tex]
Answer:
Trigonometry
Explanation:
[tex] \huge \boxed{\mathfrak{Question} \downarrow}[/tex]
What topic name does this equation go into in physics?[tex]A_{x} = A cos\theta[/tex][tex] \large \boxed{\mathfrak{Answer \: with \: Explanation} \downarrow}[/tex]
[tex] \huge \boxed{\sf \: A_{x} = A cos\theta}[/tex]
So, I think this equation will go under Types of Physical quantities, Vector Quantities, Magnitude, Direction, etc. under physics & Trigonometry under Mathematics.This formula is used when we need to find the 'x' component of the vector. You need to know basic trigonometry to solve these type of equations & also how to convert between magnitude & angles.As more information is found, some scientific theories are adapted and others are discarded. Because science can adapt to account for new information, it has proved durable over time.
For which claim does this statement provide evidence?
(1 point)
O A strength of science is that its theories are easily derived.
O A strength of science is that it supports one explanation over others.
O A strength of science is that it provides consistent explanations
O A strength of science is that its theories are tested.
Answer:
A strength of science is that it's theories are tested
Rowenda is stopped on the side of the road. She then starts pedaling her bicycle for 15 seconds. Her final
velocity is 9 m/s. What is her acceleration while she is pedaling?
Explanation:
acceleration = change in velocity / change in time
a = v2-v1
- - - - - -
t
V1 = 0 ( since she stopped)
V2 = 9 m/s
t =15s
a = 9 - 0
- - - -
15
= 0.6m/s^2
Convert the following statement to the language used by physicists, "I am cold, please turn on the heat."
Answer:
Explanation:fog
A rock is thrown downward from the top of a cliff with an initial speed of 20 m/s. If the rock hits the ground after 5.0 s, what is the height of the cliff? (Disregard air resistance. a =-g=-9.81 m/s2.)
（i want step by step)
Answer
I hope it's helps you
The microwave portion of the spectrum has wavelengths ranging from 1 mm to 1 m. Find the corresponding frequencies. g
Answer:
f = c / y where y is the wavelength
f1 = 3 *10E8 m/s / .001 m = 3 * 10E11 / s
f2 = 3 * 10E8 m/s / 1 m = 3 * 10E8 / s
Explain how the lithosphere, hydrosphere, and atmosphere individually and collectively affect the biosphere. (2 points)
The lithosphere is the solid layer of Earth, the hydrosphere is the water-based part, and the atmosphere is the air, they work together to shape the biosphere.
What is the lithosphere?The lithosphere is the soil part that composes the Earth's planet (i.e., the soil), the hydrosphere refers to oceans and all water bodies, while the atmosphere is the layer of air. These three layers interact with biotic factors to shape the biosphere.
In conclusion, the lithosphere is the solid layer of Earth, the hydrosphere is the water-based part, and the atmosphere is the air, they work together to shape the biosphere.
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For each of the problems below, you will need to draw a graph to find the solution.
3. A driver who is moving at 15 m/s, sees a stop light and puts on the brakes 30 m before an intersection.
a) What acceleration will the driver have to have to stop before entering the intersection?
b) How much time will it take to stop the car?
4. A boy standing on a bridge spits into the water below. He hears the splash 1.5 seconds later. How high is the bridge?
5. A ball is thrown upwards at 20.0 m/s.
a) How far has it traveled after 4.0 seconds?
b) What is its velocity at that time?
Answer:
Final velocity (v) of an object equals initial velocity (u) of that object plus acceleration (a) of the object times the elapsed time (t) from u to v. Use standard gravity, a = 9.80665 m/s2, for equations involving the Earth's gravitational force as the acceleration rate of an object.
Explanation:
When you put water in the ice tray in the freezer, water becomes ice. Ice is more ordered than water. Is this a violation of Second Law of Thermodynamics
Answer:
No because the heat that moved out of the water to make ice caused an even greater disorder in the environment around it.
Explanation:
The fastest and longest skydive fell an amazing 19.5 miles. His average speed while falling was 254 mi/hr. How much time did the dive last? Show Work
We have that the time the dive lasted was
[tex]T=0.076771 hours[/tex]
From the Question we are told that
Fall distance 19.5 miles
Velocity v= 254 mi/hr
Generally the equation for the Time is mathematically given as
[tex]T=\frac{v}{d}\\\\T=\frac{19.5}{254}[/tex]
[tex]T=0.076771 hours[/tex]
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What is the average velocity if the initial velocity of an object is 10 m/s & the final velocity is 28 m/s
Answer:
[tex]v_{1} = 19 m/s[/tex]
Explanation:
[tex]v_{1} = \frac{(v_{2} + u)}{2}[/tex], where [tex]v_1[/tex] = avg. velocity, [tex]v_2[/tex] = final velocity, and [tex]u[/tex] = initial velocity.
