Answer:
There is no diagram soory
a runner covers the last straight stretch of the race in 4 s. durning that time, he speeds up from 5 m/s to 9m/s what is the runners acceleration in this part of the race?
Answer:
The runner's acceleration was \(1\ m/s^2\)
Explanation:
Constant Acceleration Motion
It's a type of motion in which the velocity of an object changes by an equal amount in every equal period of time.
Being a the constant acceleration, vo the initial speed, vf the final speed, and t the time, the following relation applies:
\(v_f=v_o+at\)
Solving for a:
\(\displaystyle a=\frac{v_f-v_o}{t}\)
The runner speeds up from vo=5 m/s to vf=9 m/s in t=4 seconds, thus:
\(\displaystyle a=\frac{9-5}{4}\)
\(\displaystyle a=\frac{4}{4}=1\)
The runner's acceleration was \(1\ m/s^2\)
a car starts from rest and drives at 45 m/s in 20 s. how far did it travel
Answer:
distance=speed×time.
45×20=900m.
Two boxes of different masks are at rest. If both boxes are acted upon by equal force, which of the following statements is then true?
-If both boxes are push the same distance, then both boxes will have the same final kinetic energy.
-If both boxes are push the same distance, then the heavier box will have the smaller final momentum.
-If both boxes are push the same distance, then the lighter box will have the greater final momentum.
-If both boxes are push the same amount of time, than the heavier box will have the greater final kinetic energy.
-If both boxes are pushed for the same amount of time, then both boxes will have the same final kinetic energy.
If both boxes are push the same distance, then the heavier box will have the smaller final momentum, Option 2 is correct
What is momentum?
A characteristic of a moving body that it possesses due to its mass and motion and which, in general, is equal to the product of the body's mass and velocity: a characteristic of a moving body that establishes how long it will take to bring the body to rest when subjected to a constant force.
The product of a particle's mass as well as velocity is momentum. Momentum is a vector quantity that has both magnitude as well as direction. The force exerted on a particle is equated to the time rate of change of momentum by Isaac Newton's second equation of motion.
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the equation for density is a physical model true or false
Answer:
No
Explanation:
Because it is mass ÷ volume and its not an actual model
2. A 1,100 kg car comes uniformly to a stop. If the vehicle is accelerating at -1.2 m/s ², which force is closest to the net force acting on the vehicle? (8.6A) *
Answer:
Since the car comes uniformly to a stop, the force that acts on the vehicle is the net force whose magnitude is equal to 1320 N.
Explanation:
The force acting on the vehicle is given:
\( F = ma \)
Where:
m: is the mass = 1100 kg
a: is the acceleration = -1.2 m/s²
We can find the magnitude of the net force:
\( F = ma = 1100 kg*1.2 m/s^{2} = 1320 N \)
Since the car comes uniformly to a stop, the force that acts on the vehicle is the net force calculated above.
I hope it helps you!
Answer: its d because it said net force meaning the sum of the forces equaling to d
Explanation:
An isolated conducting rod of length 8.00 cm is oriented parallel to the x-axis. it moves in the y-direction at 3.90 m/s in the presence of a uniform magnetic field of magnitude 0.600 t that points in the -z-direction. find the magnitude of the motional emf in the rod.
The magnitude of the motional emf in the rod is 0.1872 when an isolated conducting rod of length 8.00 cm is oriented parallel to the x-axis. The speed of rod in y-direction is 3.90m/s.
Given an isolated conducting rod of length (l) = 8.00 cm = 8x10-2m
it moves in the y-direction at (v) = 3.90 m/s
uniform magnetic field of magnitude (B)= 0.600T
Let the magnitude of the motional emf in the rod be E
We know that E = BxlxV
E = 0.600T x 3.90m/s x 8x10-2m = 18.72x10-2
Hence the magnitude of the motional emf in the rod is 0.1872
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a car accelerates from 300 km/h to 140 km/h in 2.53 seconds. what is the distance covered?
Answer:
Acceleration = Change in Velocity/Time
Change in Velocity = 36-18 = 18 km/h=5 m/s
Time= 5 Seconds
Acceleration = 5/5= 1 m/s2
Equation of motion,s=ut+(1/2)at2
u=18 km/h=5 m/s
t=5 s
a=1 m/s2
s= (5*5)+(1/2*1*5*5)
s=25+12.5 i.e., s=37.5 m
Hope you are clear with my explanations
A spring has a spring constant of 300 N/m. How much force is in thespring if it is stretched 0.25 m?32
Force applied is directly proportional to displacement.
It is given by the formula
\(F=-kx\)Here F is the force , k is the spring constant , x is the displacement.
Substituting the values,
\(F=-300\text{ }\ast0.25\)\(F=-75\text{ N}\)A rubber band has an un-stretched length of 0. 10m. If someone picks up a paper clip that has a mass of 10g (0. 010kg) and pulls back on it with a rubber band to a distance of. 25 m. With what speed would the paper clip be launched horizontally? The spring constant of the rubber band is 15 N/m
The speed at which the paper clip be launched horizontally, given that the paper clip has a mass of 0.01 Kg is 5.81 m/s
How do I determine the speed?We'll begin by obtaining the energy stored in the stored in rubber. This is shown below:
Initial length = 0.10 mNew length = 0.25 mExtension (e) = 0.25 - 0.10 = 0.15 mSpring constant (K) = 15 N/mEnergy stored (E) =?E = ½Ke²
E = ½ × 15× 0.15²
E = 7.5 × 0.0225
E = 0.16875 J
Finally, we shall determine the speed. Details below:
Mass (m) = 0.01 KgEnergy (E) = 0.16875 JSpeed (v) = ?KE = ½mv²
0.16875 = ½ × 0.01 × v²
0.16875 = 0.005 × v²
Divide both side by 0.005
v² = 0.16875 / 0.005
Take the square root of both side
v = √(0.16875 / 0.005)
v = 5.81 m/s
Thus, the speed is 5.81 m/s
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The diagram shows a model of an atom. Who first proposed this model?
A. Bohr
B. Thomson
C. Rutherford
ОО
D. Dalton
A.Bohr
His model postulated the existence of energy levels or shells of electrons. Electrons could only be found in these specific energy levels; in other words, their energy was quantised, and couldn’t take just any value. Electrons could move between these energy levels but had to do so by either absorbing or emitting energy.
A. Bohr!
This answer is correct because I read the information.
you wash four loads of dishes with a single type of detergent using cold water in the first load, warm water in the second load, hot water in the third load, and room temperature water that has been neither heated nor cooled, in the fourth load. You then test the effects of the experiment by comparing how clean the dishes were in each load. Identify the control, dependent variable, and independent variable in the experiment.
please help me!?
Answer:
The water temperature is independent, and the cleanliness of the dishes is dependent.
Explanation:
You can change the independent variable in an experiment, in this case it's the water temperature. The dependent variable is the outcome from the independent variable, in this case being the cleanliness of the dishes. You can't control the cleanliness, but you can control the water temperature.
Hope my explanation isn't too confusing, hope this helps.
separate an order of 253 light fixtures so that the number of led light fixtures will be 23 fewer than twice the number of incandescent light fixtures.
Let the number of incandescent light fixtures be x; therefore, the number of led light fixtures will be (2x - 23) after separating an order of 253 light fixtures.
We know that the total number of light fixtures is 253.
x + 2x - 23 = 253
3x = 276
x = 92
Therefore, the number of incandescent light fixtures will be 92 and the number of led light fixtures will be (2 × 92 - 23) = 161.
Given that the number of light fixtures in the order is 253 and that the number of led light fixtures will be 23 fewer than twice the number of incandescent light fixtures.
Let x be the number of incandescent light fixtures in the order; hence, the number of led light fixtures will be 2x - 23.
Now, we can form an equation to solve for x using the sum of the two types of light fixtures as the total number of light fixtures given to be 253. Thus, we can write:
x + (2x - 23) = 253
3x - 23 = 253
3x = 253 + 23
3x = 276
x = 92
Hence, the number of incandescent light fixtures is 92 while the number of led light fixtures is 2x - 23 = 2(92) - 23 = 161.
Therefore, an order of 253 light fixtures can be separated into 92 incandescent light fixtures and 161 led light fixtures.
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Suppose we have a problem that currently takes 100,000 hours of computer time using current technology to solve. Which of the following would give us the solution first: (1) Replace the algorithm used in the current solution by one that runs twice as fast and run it on the current technology, or (2) Wait 3 years, assuming Moore's law doubles the performance of a computer every 18 months, and find the solution using the current algorithm with the new technology?
Suppose we have a problem that currently takes 100,000 hours of computer time using current technology to solve. Which would give us the solution first and find the solution using the current algorithm with the new technology is as follow:
In the given case, whether replacing the algorithm used in the current solution by one that runs twice as fast and run it on the current technology or waiting 3 years, assuming Moore's law doubles the performance of a computer every 18 months, which would give us the solution first:
Replacing the algorithm used in the current solution by one that runs twice as fast and run it on the current technology would give us the solution first. This is because the running time of the new algorithm is half the running time of the current algorithm. Therefore, the new algorithm would take 50,000 hours of computer time to solve the problem.
The solution using the current algorithm with the new technology would take 25,000 hours of computer time to solve the problem as 3 years is equal to 6 half-lives of 18 months for Moore's law to double the performance of a computer. The performance would increase by a factor of 2^6 = 64 times.
Therefore, the running time of the current algorithm with the new technology would be 100,000 / 64 = 1,563 hours, which is much faster than the original 100,000 hours of computer time but slower than 50,000 hours of computer time.
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Stationary charges produce _________fields, and moving charges produce _________fields respectively. *
Answer:
A stationary charge produces only electric field whereas a moving charge produces both electric as well as magnetic fields.
You are raising up a big bucket of water from a 22.5 m deep well. The combined mass of the water and the bucket is 11.3 kg. The bucket is attached to a heavy duty steel chain. The mass of the chain is 17.9 kg. How much work do you perform during the lifting process? Tries 0/12 If it takes 1.75 minutes for you to raise the bucket of water out of the well, then what was your average power?
The amount of work done during the lifting process is 4465.125 J and our average power will be 42.525 W.
Given:
Depth of the well, h = 22.5m
Mass of heavy-duty steel chain, M = 17.9 kg
The combined mass of the water and bucket, m = 11.3 kg
time taken to raise the bucket out of the water, T = 1.75 min = 105 s
Calculation:
Consider that the center of mass of the steel chain is at the midpoint of the depth of the well.
Now, the work done during the lifting process can be calculated as:
W.D = (Work done in lifting bucket filled with water) + (work done to lift
the steel chain)
W.D = mgh + Mg (h/2) -( 1 )
where g is the acceleration due to gravity
Applying values in the above equation we get:
W.D = mgh + Mg (h/2)
= (11.3 kg)(9.8 m/s²)(22.5 m) + (17.9 kg)(9.8 m/s²)(22.5 m / 2)
= 2491.65 + 1973.475
= 4465.125 J
We know that the average power is given as:
P_avg = W.D / T - ( 2 )
where W.D is the work done during the lifting process
T is the time taken to raise the bucket out of the well
Applying values in the above equation, we get:
P_avg = W.D / T
= (4465.125 J)/(105 s)
= 42.525 W
Therefore, the amount of work done during the lifting process is 4465.125 J and our average power will be 42.525 W.
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Chris shines a white light onto a surface, and the surface appears to be green. What color will the surface appear if he shines a combination of blue and green light on the surface?.
Answer: just realized this is more advanced physics so if this doesn't seem right I apologize, I had a really bad physics teacher lol. So ignore this for now!
Hey there! I think this might just be basic color mixing! The color would be a turquoise
Explanation: R G B make up our visible light spectrum. This has documented graphs. Through basic use of one, you can determine that the color would be a blue-green, commonly referred to as turquoise! There are many more color combinations then just this one as well!
What is the acceleration of a car making a turn in a circle with a 100m radius traveling at
17m/s?
Answer:
2.89 m/s²
Explanation:
From the question given above, the following data were obtained:
Radius (r) = 100 m
Velocity (v) = 17 m/s
Acceleration (a) =.?
The acceleration of a circular motion is defined by:
a = v²/r
Where:
a is the acceleration.
v is the velocity.
r is the radius.
With the above formula, we can obtain the acceleration of the car as follow:
Radius (r) = 100 m
Velocity (v) = 17 m/s
Acceleration (a) =.?
a = v²/r
a = 17²/ 100
a = 289/100
a = 2.89 m/s²
Therefore, the acceleration of the car is 2.89 m/s²
An object has more elastic potential energy if...
what is the angular momentum vector la if vector ra = <8, -7, 0> m and vector p = <15, 8, 0> kg·m/s?
The angular momentum vector L_ A can be calculated using the cross product of vector r_ A and vector p, represented as L_ A = r_ A x p. Given r_ A = <8, -7, 0> m and p = <15, 8, 0> kg· m/s, follow these steps to find the angular momentum vector:
Explanation:
Step 1: Write down the components of the vectors r_ A and p.
r_ A = <8, -7, 0> and p = <15, 8, 0>
Step 2: Calculate the cross product using the determinant formula.
L_A = <(r_ A_ y * p_ z - r_ A_ z * p_ y), -(r_ A_ x * p_ z - r_ A_ z * p_ x), (r_ A_ x * p_ y - r_ A_ y * p_ x)>
Step 3: Plug in the values and compute the cross product.
L_A = <(-7 * 0 - 0 * 8), -(8 * 0 - 0 * 15), (8 * 8 - (-7) * 15)>
L_A = <0, 0, (64 + 105)>
L_A = <0, 0, 169>
The angular momentum vector L_A is <0, 0, 169> kg·m²/s.
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If you were to push on the wall with a force of 100N, how much force would the wall push back towards you?
Answer:
100n
Explanation:
Answer:
-100N
I hope this helps!
When a rocket accelerates through space is there work done?
What is true about the nodes and antinodes of a standing wave? a. they decrease in number with time. b. they remain in a fixed position. c. their position keeps changing with time. d. they increase in number with time.
The nodes and antinodes of a standing wave always remain in a fixed position.
In a standing wave, the nodes and anti-nodes are present at fixed points.
The pattern of a standing wave shows that nodes result from destructive interference and anti-node result form constructive interference.
From a rest position, if we observe nodes and anti-node positions then we can see that nodes have zero displacement while anti-nodes are points that exhibit maximum displacement between two waves.
To put it simply, in Physics, the nodes and anti-nodes are two integral phases of a standing wave.
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Is the moon in place(in orbit) with Earths gravity or Suns gravity?
Answer:
well I don't know if this answers your question but the moon moves or orbits around the earth at the same time with the sun from some info I got
What is the wavelength of an AM radio wave in a vacuum if its frequency is 810 kHz?
the graph below shows the speed of an object during a 10 s time interval. In which of the following time intervals is the speed of the object was constant?
a. between 6 s and 8 s
b. between 2 s and 4 s
c. between 0 s and 2 s
d. between 2 s and 5 s
Answer:
b. between 2 s and 4 s
Explanation:
2-4 was both 3m/s
3. A baseball player leads off the game and hits a long home run. The ball leaves the bat at
an angle of 30.00 from the horizontal with a velocity of 40.0 m/s. How far will it travel in
the air?
A baseball player launches a big home run to start the game. The ball leaves the bat with a speed of 40.0 m/s and an angle of 30.0° from the horizontal.
What is Projectile Motion?An item or particle that is propelled into a gravitational field, for example from the surface of the Earth, and moves across a curved route only under the influence of gravity is said to be experiencing projectile motion. Most calculations make the assumption that the effects of air resistance are passive and insignificant in the specific instance of Earth projectile motion. The curving path of objects in projectile motion was proved by Galileo to be a parabola, but it could also be a straight line in the specific situation when it is hurled directly upwards. One such trajectory is a ballistic trajectory, which is the study of such motions.
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A square pipe with a side length of 2 is being used in a hydraulic system. The flow rate through the pipe is 15 gallons/second. What is the velocity of the water (in. in./sec). There are 231 cubic inches in a gallon.
Question: A square pipe with a side length of 2 is being used in a hydraulic system. The flow rate through the pipe is 15 gallons/second. What is the velocity of the water (in. in./sec). There are 231 cubic inches in a gallon.
Answer: 866.25 inches/second
Explanation:
To calculate the velocity of water flowing through the square pipe, we can use the equation:
Velocity = Flow rate / Cross-sectional area
Step 1: Calculate the cross-sectional area of the square pipe.
The cross-sectional area of a square can be found by multiplying the length of one side by itself.
In this case, the side length of the square pipe is 2 units.
Cross-sectional area = 2 units * 2 units = 4 square units
Step 2: Convert the flow rate from gallons/second to cubic inches/second.
Given that there are 231 cubic inches in a gallon, we can convert the flow rate as follows:
Flow rate in cubic inches/second = Flow rate in gallons/second * 231 cubic inches/gallon
Flow rate in cubic inches/second = 15 gallons/second * 231 cubic inches/gallon
Flow rate in cubic inches/second = 3465 cubic inches/second
Step 3: Calculate the velocity of water.
Now, we can use the formula mentioned earlier to calculate the velocity:
Velocity = Flow rate / Cross-sectional area
Velocity = 3465 cubic inches/second / 4 square units
Velocity = 866.25 inches/second
Therefore, the velocity of water flowing through the square pipe is 866.25 inches/second.
A red stop light has a frequency of 4.40x10^14Hz. Determine the wavelength.
Wavelength and Frequency:
The relationship between wavelength and frequency of light is inversely proportional.
Mathematically,
\(\lambda=\frac{c}{f}\)Where λ is the wavelength, f is the frequency, and c is the speed of light.
The speed of light is 3×10⁸ m/s
For the given case, the frequency is 4.40×10¹⁴ Hz
\(\lambda=\frac{c}{f}=\frac{3.0\times10^8}{4.40\times10^{14}}=6.81\times10^{-7}\; m\)Therefore, the wavelength of the red stop light is 6.81×10⁻⁷ m
One of the pieces of evidence supporting energy quantization was the line spectra of elements. Why does this demonstrate energy quantization?.
There are distinct emission lines indicating discrete energy levels.
When a component transmits energy in the form of radiation, a spectrum of colors is produced on a photographic plate. This spectrum can be both continuous and discrete. The spectrum persists without distinction between two regions in a continuous spectrum. This represents the uninterrupted radiation emission and thus the uninterrupted emission of energy.
The line spectrum, on the other hand, is made up of discrete and sharp lines that show the emission of radiation in a specific amount over a specific time period, with a break between emission. As a result, the line spectra supports energy quantization.
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A ball with a momentum of 16 kg.M/s strikes a ball at rest. What is the total momentum of both the balls after the collision.
Answer:
Total momentum = 16 Kgm/s
Explanation:
Let the momentum of the two balls be A and B respectively.
Momentum A = 16 kgm/s
Momentum B = 0 kgm/s (since the ball is at rest).
Total momentum = A + B
Total momentum = 16 + 0
Total momentum = 16 Kgm/s
Momentum can be defined as the multiplication (product) of the mass possessed by an object and its velocity. Momentum is considered to be a vector quantity because it has both magnitude and direction.
Mathematically, momentum is given by the formula;
\( Momentum = mass * velocity \)
Total momentum of both the balls after the collision is 16 Kg.m/s
Given:
Momentum= 16 kg.m/s
To find:
Total momentum of both the balls after the collision.
What is momentum?
Momentum can be defined as the product of the mass possessed by an object and its velocity. Momentum is considered to be a vector quantity since it has both magnitude and direction.It is given as: \(\text{P}=\text{m*v}\) where m= mass and v=velocity of an object.Consider the momentum of the two balls be A and B respectively.
Momentum A = 16 kg.m/s
Momentum B = 0 kg.m/s (since the ball is at rest).
Total momentum = A + B
⇒ 16 + 0
Total momentum= 16 kg.m/s
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