if a truck has 40,00kg*m/s of momentum and is moving with a velocity of 90m/s.what is the trucks mass?
Answers
Answer:
mass = 444.44 kg
Explanation:
To calculate the mass of the truck, we can use the formula for momentum:
Momentum (p) = mass (m) × velocity (v)
Given:
Momentum (p) = 40,000 kg·m/s
Velocity (v) = 90 m/s
We can rearrange the formula to solve for mass (m):
m = p / v
Substituting the given values:
m = 40,000 kg·m/s / 90 m/s
m ≈ 444.44 kg
Therefore, the mass of the truck is approximately 444.44 kg.
Related Questions
(b) With a current of 0.38 A, the average velocity of an electron in the wire is 5.5 10-6 m s-1 and the average magnetic force on one electron is 1.4 10-25 N. Calculate the flux density B of the magnetic field.
Answers
Answer:
B = 0.159 T
Explanation:
Given that,
Current, I = 0.38 A
The average velocity of the electron, \(v=5.5\times 10^{-6}\ m/s\)
The average magnetic force on the electron, \(F=1.4\times 10^{-25}\ N\)
We need to find the flux density B of the magnetic field. We know that the magnetic force is given by :
\(F=qvB\\\\B=\dfrac{F}{qv}\)
Put all the values,
\(B=\dfrac{1.4\times 10^{-25}}{1.6\times 10^{-19}\times 5.5\times 10^{-6}}\\\\B=0.159\ T\)
So, the required flux density of the magnetic field is 0.159 T.
A body of mass 12kg traveling at 4.2m/s collides with a second body of mass 18kg at rest. Calculate their common velocity if the bodies coalesce after collision
Answers
Answer:
.
The common velocity of the two bodies after the collision is 2.7 m/s.
This can be calculated using the equation of conservation of momentum:
m1v1 + m2v2 = (m1 + m2)v
where m1 is the mass of the first body (12 kg), v1 is the velocity of the first body (4.2 m/s), m2 is the mass of the second body (18 kg), v2 is the velocity of the second body (0 m/s), and v is the common velocity of the two bodies after the collision.
Substituting the given values into the equation, we get:
12(4.2) + 18(0) = (12 + 18)v
Solving for v, we get:
v = 2.7 m/s
La respondería si supiera inglés, pero es que no entiendo nada…
Levees are used ________. A) to block water flow and hold water in a reservoir B) to pump water from an aquifer C) to prevent flooding and facilitate shipping D) to transport water from a river to an urban center E) along scenic byways so drivers can get a better view of a river
Answers
Levees are used C) to prevent flooding and facilitate shipping.
Levees are structures built along riverbanks or coastlines to provide protection against flooding. They are designed to confine water within the natural channels, preventing it from overflowing onto adjacent land areas. Levees are typically constructed using materials such as soil, rocks, or concrete.
The primary purpose of levees is to prevent flooding by controlling the flow of water during periods of high water levels, such as heavy rainfall or spring snowmelt. They act as barriers, preventing the water from spilling over onto flood-prone areas and protecting communities and infrastructure located in floodplain regions.
In addition to flood control, levees also play a role in facilitating shipping. By confining the water within the river channels, levees help maintain a consistent water depth, allowing for the navigation of ships and barges. This is particularly important in areas with navigable rivers, as it enables the transportation of goods and facilitates commerce.
The other options listed in the question are not accurate descriptions of the primary purpose of levees. Levees are not used to block water flow and hold water in a reservoir (A), pump water from an aquifer (B), transport water from a river to an urban center (D), or solely for providing a better view of a river along scenic byways (E).
Levees serve the crucial purpose of preventing flooding and facilitating shipping. They provide protection against floodwaters by controlling the flow of water within river channels and help maintain consistent water levels for navigation. These structures play a vital role in safeguarding communities, infrastructure, and economic activities in flood-prone regions.
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can someone please help
Answers
Answer:
The last one
Explanation:
Pick the last one : )
Help Quick!!!!
In the formation of metamorphic rocks, what effect do temperature and pressure primarily have?
A:They erode rocks.
B:They create layers.
C:They make rocks smaller.
D:They change existing minerals.
HURRY PLEASE!!!
Answers
give reason standard physical quantity is used for correct measurement of the given body
Answers
Answer:
Physical quantities are the substances which can be measured. By measuring physical quantities, we can measure the mass, weight and other physical properties
Standard physical quantity is used for measurement because they are the components of a given body that can be measured using physical measuring tools and are less prone to errors; weighing balance, Rule are some of the measuring tools
Physical and non-physical quantities can be measured but the measurement carried out on physical quantities are less prone to error, when compared to non-physical measurement. Non-physical measurements are carried out using the Ordinal scale ( more or less an estimate measurement )
Examples of physical quantities includes : mass , height , temperature while Non-physical quantities includes : anger , personal feelings e.t.c
Hence the reason why standard physical quantities are used is because they are measured using measuring tools and are less prone to error
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At which point(s) does the ball have 25% potential energy and 75% kinetic energy?*
Answers
Answer:
hey
Explanation:
hey
Which is the most likely a reason why? A tobacco company funded Amelia to run experiments and publish a paper. She spent a year completing several experiments to find a way to process tobacco leaves that would be better for health. Amelia conducted controlled experiments, and her results were the same each time. When scientists began conducting peer review, several of them were concerned that the results would be biased. O Her funding was from a source that could profit from the results. O She did not carry out the experiments for the minimum of 5 years. Most scientists do not conduct research on tobacco products. O Her results should have shown variation in the outcome.
Answers
Answer:
A. Her funding was from a source that could profit from the results.
Explanation:
GOT IT RIGHT
Calculate the ratio of neutrons to protons in lead-206 and uranium-238. In which nucleus is the ratio closer to 3:2?
Answers
Answer:
Pb =- Lead No. 82 Wt 206 N = 206 - 82 = 124 Rat = 124/82 = 1.5`1
U = Uranium No. 92 Wt 238 N = 238 - 92 = 146 Rat = 146/92 = 1.59
3:2 = 1.50 Pb is closer to 3:2
Periodontal diseases in teeth and osteoarthritis are common problems that show up on skeletal remains.
O A. True
OB.
False
Answers
If a rock sample has a mass of 1.17 g and a volume of 0.33 cm3,
Answers
Answer:
then it's a rock
Explanation:
if all the energy stored in the capacitor is delivered in electric current, what is the voltage difference at which the current was delivered? give your answer in volts.
Answers
If all the energy stored in the capacitor is delivered in electric current, the voltage difference at which the current was delivered is 124V.
The voltage difference at which the current was delivered is equal to the voltage stored in the capacitor. In other words, if the capacitor is charged to a certain voltage, then the current delivered will be at that same voltage. So, the voltage difference is equal to the voltage stored in the capacitor in Volts.
The voltage difference at which the current is given by the formula:
V = sqrt(2E/Q)
Where, V is the voltage difference, E is the energy stored in the capacitor and Q is the capacitance of the capacitor. Thus, the voltage difference at which the current was delivered can be found by calculating the square root of two times the energy stored in the capacitor divided by the capacitance of the capacitor. This is given as:
V = sqrt(2E/Q)
Where, E = 1/2 × C × V² (energy stored in capacitor), C = 1.8 × 10^-3 F (capacitance of the capacitor), V = 120V (voltage of the capacitor)
Substituting the values above:
E = 1/2 × 1.8 × 10^-3 F × (120 V)^2 = 13.824 J
Therefore,
V = sqrt(2 × 13.824 J/1.8 × 10^-3 F) = sqrt(15360) = 124 V
Thus, the voltage difference at which the current was delivered is 124V.
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mars has two moons, phobos and deimos, that are most similar in character to ______________
Answers
Mars' two moons, Phobos and Deimos, are small and irregularly shaped, making them more similar in character to asteroids than to other moons in our solar system.
They are believed to be captured asteroids that were pulled into Mars' orbit by its gravity. Phobos is the larger of the two moons and is heavily cratered, while Deimos is smaller and smoother. The moons have been the subject of scientific study and exploration, including a number of missions by space agencies such as NASA, the European Space Agency, and the Soviet Union.
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Which forces could be used to conduct a simple experiment that tests the effect of force on an object?
Answers
Answer: electrostatic force
Explanation:
electrostatic forces pull or push on objects without touching them, which is how when you rub some materials together they can result in something called a 'charge', being moved from point A to point B.
If the number of wavelengths that pass a point in a given time increases, what has increased?
A.frequency
B.amplitude
C.intensity
D.wavelength
Answers
Wat is acceleration!???
Answers
Explanation:
Acceleration , rate at which velocity changes with time, in terms of both speed and direction.Scientists speculate that the properties (laws) of the universe must be the way they are because if they were significantly different, we would not be here to think about them. This idea is called
Answers
The idea that the properties of the universe are finely tuned to support life and that any significant deviation from these properties would make life impossible is called the anthropic principle.
It suggests that the universe appears to be designed for the existence of intelligent life because any other type of universe would not allow the emergence and evolution of life forms. The anthropic principle is a controversial topic in the philosophy of science and cosmology, and there are different versions of it, including the weak anthropic principle and the strong anthropic principle.
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What is the speed of a Olympic diver just before they hit the water if they jump from a 9.14 m (30)foot platform ? assume they dive straight down.A) 24.26 m/s B) 57.25 m/sC) 179.33 m/s D) 13.39 m/s
Answers
We will have the following:
\(\begin{gathered} d=vt+\frac{1}{2}at^2 \\ \\ \Rightarrow9.14=(0)t+\frac{1}{2}(9.8m/s^2)t^2\Rightarrow t^2=\frac{9.14}{4.9} \\ \\ \Rightarrow t=\sqrt{\frac{457}{245}}\Rightarrow t\approx1.365762103...s \end{gathered}\)Now, we determine the velocity:
\(\begin{gathered} v_f=v_it+at \\ \\ \Rightarrow v_f=(0m/s)(\sqrt{\frac{457}{245}}s)+\frac{1}{2}(9.8m/s^2)(\sqrt{\frac{457}{245}}s)^2\Rightarrow v_f=\frac{457}{50}m/s \\ \\ \Rightarrow v_f=9.14m/s \end{gathered}\)So, the velocity is 9.14 m/s.
What causes enhancement artifact ?
a. sound beams bending
b. linear array transducer architecture
c. unexpectedly low acoustic attenuation
d. acoustic energy radiating in a direction other than the beam's main axis
Answers
They can cause other types of artifacts in ultrasound imaging.
Enhancement artifact in ultrasound imaging is caused by unexpectedly low acoustic attenuation in the tissue being imaged.
Attenuation refers to the weakening of the ultrasound signal as it passes through tissue, and it is influenced by various factors such as the tissue's density, composition, and structure. When an area of tissue has lower attenuation than its surroundings, more of the ultrasound signal passes through that area, resulting in an increase in signal intensity and brightness on the image. This can give the false impression that the tissue has a higher density or composition than it actually does, leading to an enhancement artifact.
Therefore, the correct answer is c. unexpectedly low acoustic attenuation.
Sound beams bending, linear array transducer architecture, and acoustic energy radiating in a direction other than the beam's main axis are not direct causes of enhancement artifacts. However, they can cause other types of artifacts in ultrasound imaging.
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0.362 in standrad form is
\(0.362\)
Answers
Answer:
3.62 x 10^-1
Explanation:
Remember to use the decimal to determine the power of the 10
which type of star has the least amount of pressure in its atmosphere?
Answers
Answer:
red dwarfs
Explanation:
they are very low mass stars, as a result they have relatively low pressures
Do heavier bowling balls go faster than lighter ones?
Answers
Answer:
lighter ones will go faster
Explanation:
assuming you throw both bolwing ball with 10N of force. one is 3kg and the other is 5kg.
by using the equation: F = ma
a = F/m
a = 10/5 = 2m/s^2
a = 10/3 = 3.33333 m/s^2
A monochromatic light source illuminates a double slit and theresulting interference pattern is observed on a distantscreen. Let d=center to center slit spacing, a=individualslit width, D= screen to slit distance and L=adjacent dark linespacing in the interference pattern. The wavelength of lightis then:
a: dl/D
b: Ld/a
c: da/D
d: lD/a
e Dd/L
Answers
The wavelength of light can be determined using the double-slit interference equation.The wavelength of light is Ld/a So, so the correct option is b: Ld/a.
L = (mλD)/d
Where L is the distance between adjacent bright or dark fringes, m is the order of the fringe (starting at m=1 for the first bright fringe), λ is the wavelength of the light, D is the distance from the slits to the screen, and d is the distance between the centers of the two slits.
If we rearrange this equation to solve for λ, we get:
λ = (Ld)/mD
Note that a and D do not appear in this equation, so options a, c, and e can be eliminated.
Option b, Ld/a, does not match this equation and is therefore also incorrect.
The correct answer is d, lD/a, which is equivalent to the equation we derived above, but with m=1. This gives us the wavelength of the light for the first bright fringe:
λ = (LD)/d
So, the wavelength of the light is directly proportional to the distance between the screen and the slit, and inversely proportional to the distance between the centers of the two slits.
The correct formula for the wavelength of light in a double-slit interference pattern is:
λ = (Ld) / D
where λ represents the wavelength of light, L is the adjacent dark line spacing in the interference pattern, d is the center-to-center slit spacing, and D is the screen-to-slit distance.
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it takes light approximately 8 minutes to reach the earth from the surface of the sun. the distance between jupiter and the sun is five astronomical units (5 au). how long does it take light to travel that distance?
Answers
It takes light approximately 39.5 minutes to travel the distance from the Sun to Jupiter.
Since it takes light approximately 8 minutes to reach the Earth from the surface of the sun, we know that the distance between the sun and the Earth is 1 astronomical unit (1 au).
Therefore, to find out how long it takes light to travel 5 au (the distance between Jupiter and the sun), we can use the following formula:
time = distance ÷ speed of light
The speed of light is approximately 299,792,458 meters per second.
So,
time = 5 au x 149,597,870,700 meters/au ÷ 299,792,458 meters/second
time = 39.5 minutes
Therefore, it takes approximately 39.5 minutes for light to travel from the surface of the sun to Jupiter.
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Which element forms more com-
pounds than all the other elements
combined?
Answers
Answer:
Terms in this set (7) Which element forms more compounds than all the other elements combined? Carbon.
Explanation:
Hope its helps you ✌️
Lab: Kinetic Energy What is the purpose of the lab, the importance of the topic, and the question you are trying to answer? What is your hypothesis (or hypotheses) for this experiment? What methods are you using to test this (or each) hypothesis? Section II: Data and Observations Locate the data and observations collected in your lab guide. What are the key results? How would you best summarize the data to relate your findings? Do you have quantitative data (numerical results or calculations)? Do you have qualitative data (written observations and descriptions)? How can you organize this date for your report? Section III: Analysis and Discussion What do the key results indicate? If you constructed graphs, what trends do they indicate in your data? Were there any problems with the experiment or the methods? Did you have any surprising results? Section IV: Conclusions What do the results tell you about your hypothesis(es)? How do the data support your claim above? If you could repeat the experiment and make it better, what would you do differently and why?
Pls hurry!!!!!!!! Worth 100 pts!
Answers
You climb to the top of a ladder. You drop a a ball from height H, it reaches the ground with speed V if there is no air resistance. From what height should you drop it so it will reach the ground with three times the original speed?
√3H
H
6H
9H
(pls help its due today)
Answers
Answer:
heymelissa its amanda i hate ms spearman
Explanation:
yuh
A string of density 0.01 kg/m is stretched with a tension of 5N and fixed at both ends. The length of the string is 0.1m. What is the first four resonance frequencies in the string?
Answers
Answer:
The first four resonance frequency in the string are;
1) 50·√50 Hz
2) 100·√50 Hz
3)150·√50 Hz
4) 200·√50 Hz
Explanation:
The given parameters of the string are;
The density of the string, ρ = 0.01 kg/m
The tension force on the string, T = 5 N
The length of the string, l = 0.1 m
Therefore the mass of the string, m = Length of string × Density of the string
∴ m = 0.01 kg/m × 0.1 m = 0.001 kg
The formula for the fundamental frequency, f₁, is given as follows;
\(f_1 = \dfrac{\sqrt{\dfrac{T}{m/L} } }{2 \cdot L} = \dfrac{\sqrt{\dfrac{T}{\rho} } }{2 \cdot L}\)
Where;
f₁ = The fundamental frequency in the string
T = The tension in the string = 5 N
m = The mass of the string = 0.001 kg
L = The length of the string = 0.1 m
ρ = The density of the string = 0.01 kg/m
By plugging in the values of the variables, we have;
\(f_1 = \dfrac{\sqrt{\dfrac{5}{0.01} } }{2 \times 0.1} = 50 \cdot \sqrt{5}\)
The first four harmonics are;
f₁, 2·f₁, 3·f₁, 4·f₁
Therefore, we have the first four resonance frequency of the string are as follows;
1 × 50·√50 Hz = 50·√50 Hz
2 × 50·√50 Hz = 100·√50 Hz
3 × 50·√50 Hz = 150·√50 Hz
4 × 50·√50 Hz = 200·√50 Hz
How long will it take a projectile to hit the ground from a 400 m tall cliff when launched at 30 m/s horizontally?
19.55 sec
13.33 sec
9.03 sec
4.54 sec
Fast reply if possible
Answers
Explanation:
two skaters push off, one heads right with a momentum of -85.0kgm/s and one heads left with a momentum of -65.0kgm/s. what was their momentum before they pushed off from each other
Answers
Before the two skaters pushed off from each other, their total momentum was zero. This is because the momentum of one skater going to the right (-85.0kgm/s) is exactly balanced by the momentum of the other skater going to the left (-65.0kgm/s).
According to the law of conservation of momentum, the total momentum of a closed system remains constant unless acted upon by an external force. In this case, the two skaters are the only objects in the system and they are pushing off from each other, but the total momentum of the system remains zero.
It is important to note that momentum is a vector quantity, meaning it has both magnitude and direction. The negative sign in front of the momentum values indicates the direction of the skaters' motion, with one going to the right and the other to the left. The magnitude of their momentum values (85.0kgm/s and 65.0kgm/s) tells us how difficult it would be to stop their motion if they were to collide with another object.
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