Answer:
13.5
Explanation:
x= Length
.5 = Center Point
x=0.5(9)= 4.5
So total length over the edge will be given as
Length (L) =9+4.5=13.5
The maximum overhang for two uniform bricks of length 18 m each, when stacked, is 13.5 m. This is determined by considering the center of mass and static equilibrium of the bricks.
Explanation:The question involves the concept of static equilibrium and center of mass in the field of physics. When two uniform bricks of length 18 m are stacked and placed such that they overhang the edge of a surface, the maximum overhang is achieved when the center of mass of the system is still supported by the surface. To find the maximum overhang for two bricks, we can apply the principle of moments. For two stacked bricks, the bottom brick can overhang by half its length, namely 9 m. The top brick can be shifted further out but must keep its center of mass over the bottom brick. The maximal overhang of the second brick is therefore half of what remains from the first brick, which is ½ × 9 m = 4.5 m. Hence, the maximum overhang for the top brick is 4.5 m beyond the end of the bottom brick, which itself overhangs by 9 m. Consequently, the total maximum overhang for two stacked bricks is 13.5 m.
A mass on a spring with k=88.7 N/m oscillates 15 times in 9.24s. what is the objects mass? unit=kg?
The mass on the spring is 0.86 kg
Explanation:
The period of a mass-spring system is given by the equation
[tex]T=2\pi \sqrt{\frac{m}{k}}[/tex]
where
m is the mass
k is the spring constant
In this problem, we have:
k = 88.7 N/m is the spring constant
The system makes 15 oscillations in 9.24 s: therefore, the period of the system is
[tex]T=\frac{9.24}{15}=0.62 s[/tex]
Now we can re-arrange the first equation to solve for the mass:
[tex]m=k(\frac{T}{2\pi})^2=(88.7)(\frac{0.62}{2\pi})^2=0.86 kg[/tex]
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Answer:
0.86
Explanation:
Acellus
!!MARKING BRAINLIST!! WORTH 30 | You are walking down the hallway and your mean little brother sticks his foot out to trip you. You don't notice and land- SPLAT! - sprawled out on the floor. Based on the laws of motion, why did you fall?
3rd Law: Action- brother sticks out his foot. Reaction- you fall.
1st Law: Your body was an object in motion and stayed in motion.
Since the force stopped only your feet, the rest of your body kept going and fell
2nd Law: You weigh more than your little brother, so you had more acceleration.
4th Law: Little brothers are always mean
Answer:
Since the force stopped only your feet, the rest of your body kept going and fell
Explanation:
Answer:
the answer is the 3rd Law: Action- Brother sticks out his foot. Reaction- you fall.
Hope it helps!
What does M represent in the equation below?
m = M + 5 log(d/10)
A. luminosity
B. spectral class
C. absolute magnitude
D. apparent magnitude
Answer:
m represents apparent magnitude in the equation m = M + 5 log(d/10).
Explanation:
Hii:) anyone able to help with this question? ( it’s in the pic above)
Thank you :) !
Answer:
dang your teacher gave you a hard one xD
Explanation:
Answer:
4.0s
Explanation:
The period of the pendulum is the time taken for it to complete 1 full oscillation. This means that the pendulum moves this way for it to be 1 oscillation:
P ➟ Q ➟ R ➟ Q ➟ P
Since the pendulum only moved back to midpoint Q and not back to P, it has completed less than 1 oscillation.
Let each movement to the next section be 1 unit.
So 1 oscillation - 4units
In this case, the pendulum moved 3 units.
3 units ----- 3s
1 unit ----- 3÷3
1 unit ----- 1s
Thus 1 full oscillation would take 4(1)= 4s
Therefore, period of pendulum= 4s.
A 1.000kg block of phosphorus-32, which has a half life of 14.3 days, is stored for 100.1 days. At the end of this period, how much phosphorus-32 remains?
Answer: 0.0078 kg
Explanation:
The answer can be found using the Radioactive Half Life Formula:
[tex]A=A_{o}.2^{\frac{-t}{h}}[/tex]
Where:
[tex]A[/tex] is the final amount of phosphorus-32
[tex]A_{o}=1 kg[/tex] is the initial amount of phosphorus-32
[tex]t=100.1 days[/tex] is the time elapsed
[tex]h=14.3 days[/tex] is the half life of phosphorus-32
Solving with the given data:
[tex]A=(1 kg)2^{\frac{-100.1 days}{14.3 days}}[/tex]
[tex]A=0.0078 kg[/tex] This is the remaining amount of phosphorus-32
Given a 1.000kg block of phosphorus-32 with a half-life of 14.3 days, we can calculate the remaining amount after 100.1 days using exponential decay and the half-life formula.
Explanation:The question pertains to the concept of radioactive decay, particularly concerning the half-life of an isotope. The block of phosphorus-32 being referred to undergoes radioactive decay, and its half-life, or the time required for half of the substance to decay, is 14.3 days.
To find out how much remains after a certain number of days, we can use the equation N = N0*(1/2)^(t/T), where N is the final amount, N0 is the initial amount, t is the elapsed time, and T is the half-life. In this case:
N0 = 1.000 kg (initial amount)T = 14.3 days (half-life)t = 100.1 days (elapsed time)
Inserting the respective values into the formula, we find how much phosphorus-32 remains at the end of this period.
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a bat traveling at 10m/s for 10 seconds has traveled how much distance
Answer:
100m
Explanation:
Speed = distance divided by time or v=d/t . By making d the subject of the formula we have d = v x t which is 10 x 10 = 100
3 m/s north is an example of a(n) ____.
It is velocity. Velocity is a vector quantity. Vector quantity has both magnitude and direction. 3 m/s north has 3 m/s as magnitude and north as direction.
Velocity is a vector quantity. The movement of an object 3 m/s north is an example of Velocity.
Velocity:
It is defined as the rate of change in the position of an object with time, respect to a frame of reference.
In simple word it is the speed of object in a particular direction.It is a vector quantity.Here, 3 m/s second is the speed of the object but the direction of movement is also given hence it is velocity.
Therefore, the movement of an object 3 m/s north is an example of Velocity.
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If gravity between the Sun and the Earth suddenly vanished, Earth would continue moving
A. in a curved path B. an outward spiral
C. an inward spiral path D. in a straight-line
Answer:
D, if the sun was removed, all the planets would go flying off into space.
Explanation:
If gravity between the Sun and the Earth disappeared, the Earth would continue moving in a straight line according to Newton's first law of motion or the law of inertia. This law states that an object in motion stays in motion unless acted upon by an external force. In absence of the Sun's gravitational force, Earth would just continue in the direction it was heading, essentially a straight line.
Explanation:If the gravity between the Sun and the Earth suddenly vanished, the Earth would continue moving in a straight line. This principle is based on Newton's first law of motion, also known as the law of inertia. This law states that an object in motion tends to stay in motion unless acted upon by an external force. In our solar system, that external force is primarily gravity from the Sun which keeps Earth in its elliptical orbit. Without this gravitational force, Earth would simply continue in the direction it was heading when the gravity disappeared, which is essentially a straight line.
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Ultraviolet radiation is dangerous because it has a high enough energy to damage skin cells. What is the BEST explanation of the relationship between wavelength and wave energy? A) Wave energy is related only to frequency, not wavelength. B) Longer wavelengths have lower frequencies but higher energy. C) The shorter the wavelength, the lower the frequency and the higher the energy. D) The shorter the wavelength, the higher the frequency and the higher the energy.
The answer is shorter the wavelength, higher the frequency and higher the energy.
Explanation:
The sun radiates UV energy in a wide range of wavelength, which are invisible to human eyes. The shorter the wavelength, the more energetic the radiation, and the greater the potential for harm.
The relationship between wavelength and wave energy is shorter the wavelength, higher the frequency and higher the energy.
It has a frequency ranges from 8 × 10^14 to 3 × 10^16 cycles per second, or hertz (Hz), and wavelengths id about 380 nanometers to about 10 nm.
Answer:
A
Explanation:
explain why solar eclipses do not occur every time the moon revolves around earth
Answer:
the moon, earth, and sun all must be in alignment ; not just the moon and earth
Final answer:
Eclipses occur when the Moon, Earth, and Sun align, but the Moon's orbit inclination causes eclipses to be rare occurrences due to the specific alignment needed for an eclipse to happen.
Explanation:
Eclipses occur when the Moon, Earth, and Sun are directly lined up in the full Moon (lunar eclipse) and new Moon (solar eclipse) positions. Eclipses do not occur every month because the Moon's orbit is inclined about 5 degrees so usually the Moon is little above or a little below the direct line of sight from the Sun.
The reason for the rarity of eclipses lies in the inclination of the Moon's orbit. This inclination causes the Moon to mostly be positioned either above or below the Earth during a new moon, preventing a solar eclipse every month.
While the Moon revolves around the Earth close to once a month, the specific alignment required for an eclipse to occur is met only occasionally due to the intricate orbital dynamics between the Earth, Moon, and Sun.
if an object was dropped from an airplane and took 14.2s to fall to the earth , what was the height of the plane
Answer:
1008.2m
Explanation:
H = 1/2gt^2
g is acceleration due to gravity 10m/s^2
= 1/2 x 10 (14.2)^2
= 1/2 x 10 x 201.64
= 1008.2m
is the SI unit of work newton?
Answer:
No
Explanation:
The s.i. unit of work is Joules. Work is measured in Joules. It is the product of force and the distance moved in the direction of the force. Force is in Newton while distance is measured in metres.
A ball is dropped off the side of a bridge. after falling 1.55 s, what is its velocity?
Answer:
-15.19 m/s
Explanation:
The 1D kinematic equation for velocity is the v = v0 * at.
In this case, v is the final velocity (what we're after), v0 is the initial velocity, a is the acceleration, and t is the time elapsed.
v0 is 0 because at 0 seconds we are just releasing the ball.
a is the acceleration due to gravity as no other factors are specified.
t is the change in time.
v = 0 * -9.8 m/s^2 * 1.55 = -15.19 m/s.
Answer:
-15.19
Explanation:
Would a wire carrying more electrons transfer more energy than a wire carrying fewer electrons? Explain why or why not.
Answer:
no
Explanation:
abcdefghijklmnopqrstuvwxyz
Answer:IT depends on the material of the wire
Explanation:certain materials help them move faster
Which statement best describes the weather shown by the purple combination of semicircles and triangles on a line on a weather map? An occluded front can cause light to heavy precipitation that may last several days. A stationary front may produce rainy or snowy weather for several days. A warm front brings drizzly weather. A cold front can cause heavy rain, thunder, and lightning.
Answer: the answer is:
" An occluded front light to heavy precipitation that my last several days.''
Explanation: i got it right on my test
hope it helps
A warm front is the best description of the weather combinations that are seen in semi-circles and triangles on the weather map.
A warm front is a leading edge of an equator facing warm air mass. A warm front lies in place of low pressure. The front is usually followed by cooler air and gets lifted as a result of this light weight. The warm front is characterized by relatively stable and increasing rainfall.Hence the option C is correct.
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when two object P and Q are supplied with the same quantity of heat, the temperature change in P is observed to be twice that of Q. The mass of P is half that of Q. The ratio of the specific heat capacity of P to Q
When two object P and Q are supplied with the same quantity of heat, the temperature change in P is observed to be twice that of Q. The mass of P is half that of Q. The ratio of the specific heat capacity of P to Q
Explanation:
Specific heat capacity
It is defined as amount of heat required to raise the temperature of a substance by one degree celsius .
It is given as :
Heat absorbed = mass of substance x specific heat capacity x rise in temperature
or ,
Q= m x c x t
In above question , it is given :
For Q
mass of Q = m
Temperature changed =T₂/2
Heat supplied = x
Q= mc t
or
X=m x C₁ X T₁
or, X =m x C₁ x T₂/2
or, C₁=X x 2 /m x T₂ (equation 1 )
For another quantity : P
mass of P =m/2
Temperature= T₂
Heat supplied is same that is : X
so, X= m/2 x C₂ x T₂
or, C₂=2X/m. T₂ (equation 2 )
Now taking ratio of C₂ to c₁, We have
C₂/C₁= 2X /m.T₂ /2X /m.T₂
so, C₂/C₁= 1/1
so, the ratio is 1: 1
Which of the following planets has a diameter that is larger than the diameter of the Earth? A. Mars B. Venus C. Neptune D. Mercury
Answer:
Neptune.
Explanation:
Earth has a diameter of 7,915 miles. I know that both Mars, Venus, and Mercury have a smaller size than earth so they must have a smaller diameter. Neptune, with a diameter of 30,599 miles, is the only one bigger than earth.
hope this helps!
What is an acid-base reaction also called?
A. Antacid reaction
B. Neutralization reaction
C. Salt-water reaction
D. Single-displacement reaction
Answer:
B. Neutralization reaction.
Explanation:
Acid base reaction is called neutralization reaction because the product of this reaction are neutral substances.(i.e. salt and water which are neutral in nature as their PH value is 7).
For example...
HCl + NaOH -----> NaCl + H2O
Here, acid(HCl) reacts with base(NaOH) to give nutral substances salt(NaCl) and water(H2O).
What does the graph of acceleration vs. time look like for something going a
constant velocity?
O
A. A downward sloping straight line
O
B. A vertical line.
O
C. A horizontal line.
O
D. A curving line with upward slope.
Acceleration vs time graph would show C. A horizontal line (at zero)
Explanation:
The acceleration of an object is the rate of change of velocity of the object:
[tex]a=\frac{\Delta v}{\Delta t}[/tex]
where
[tex]\Delta v[/tex] is the change in velocity
[tex]\Delta t[/tex] is the time interval
For an object moving at constant velocity,
[tex]\Delta v = 0[/tex]
This means that also the acceleration is zero:
[tex]a=0[/tex]
And therefore, if we plot the graph of the acceleration vs time, we would see a horizontal line (cosntant acceleration) at zero (because the acceleration is zero).
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What projection angle produces the longest distance?
Answer:
The sine function reaches its largest output value.
Explanation:1 with an input angle of 90 degrees, so we can see that for the longest-range punts 2θ = 90 degrees and, therefore, θ = 45 degrees. A projectile, in other words, travels the farthest when it is launched at an angle of 45 degrees.
HELP ASAP
Explain why someone driving a modern vehicle is more likely to survive a car accident than someone driving a classic car (50 years old or older). Assume the details of the crashes are the same other than the type of vehicle being driven.
Modern vehicles tend to have more safety measures, such as more efficient airbags and seatbelts, which can prevent some deadly injuries that come from car crashes. Older vehicles don't have as many safety features due to the lack of technology.
Answer: Its more better bc the modern car has more protection.
Explanation:Hope this helps.
1600 AM broadcasts radio waves with wavelengths
of about 187.37 m. Convert this to miles.
Answer:
The wavelength in miles is 0.1165 miles.
Explanation:
Given:
Wavelength of the radio wave is 187.37 m.
Now, the wavelength is given in meters.
We need to convert the wavelength from meters to miles.
In order to convert meters to miles, we have to use their conversion factor.
We know that,
1 meter = [tex]\frac{1}{1609}\ miles[/tex]
Therefore, the conversion factor is given as:
[tex]CF=\frac{1}{1609}\ miles\ per\ meter[/tex]
So, the wavelength in miles is given as:
[tex]Wavelength=\textrm{Wavelength in meters}\times CF\\\\Wavelength=187.37\ m\times \frac{\frac{1}{1609}\ miles}{1\ m}\\\\Wavelength=\frac{187.37}{1609}\ miles\\\\Wavelength=0.1165\ miles[/tex]
Hence, the wavelength in miles is 0.1165 miles.
What is the difference between accurate data and
reproducible data?
Answer:
Reproducible data is one component of the precision of a measurement or test method and accurate data is one of the components of data quality.
OR
The data which is accurate means it can't be changed further is called accurate data. while, The data which is changed again and again is called reproducible data. Reproducible data is one component of the precision of a measurement or test method and accurate data is one of the components of data quality.
Answer:
Accuracy is a general concept while precision is more of a mathematical concept. On the whole though, the conceptual boundary between the use of the two words is kind of fuzzy. While accuracy means being correct and true in every detail, precision means being more exact and to the point in reference to a certain standard or method. For example, you can be accurate with your answer but you can be precise with the method of calculation.
Accuracy may also refer to the truthfulness of data and records. For example, you can have accurate demographic data of the people in a city. But, in this case precise would refer more to the inferences you have drawn from the accurate date in your possession about the demography of the city in question.
While accuracy refers more to the correctness of data, precision can also refer to greater detail in description of an object or concept. For example, accuracy can be kept in mind while collecting people’s opinion on the social system of marriage but precision will be required in detailing each case study and interpreting it.
Both accuracy and precision can also refer to results obtained from mechanical objects like a compass and watch. For example, if you have tuned or set your watch and compass accurately, it will be able to give you the current time and direction at any given moment with precision.
Explanation:
Which is the best description of a molecule?
A molecule of an element is composed of at least two types of atoms.
Amolecule of a compound is composed of only one type of atom.
A molecule of a compould is composed of at least two types of atoms.
A molecule of an element is composed of exactly two types of atoms.
Answer:
A molecule of an element is composed of exactly two types of atoms.
Explanation:
Answer: I believe that the correct answer is C....I could be wrong though...
Explanation:
What is the mass of an object that has an acceleration of 2.63 m/s2 when an unbalanced force of 112 N is applied to it?
The mass of object is 42.6 kg
Solution:
Given that,
Acceleration = 2.63 [tex]m/s^2[/tex]
Applied unbalanced force = 112 N
To find: mass of object
Newton's second law gives the relation between the applied force and the acceleration produced by it. Mathematically, it can be written as :
[tex]F = m \times a[/tex]
Where, "m" is the mass and "a" is the acceleration
Substituting the given values we get,
[tex]112 = m \times 2.63\\\\m = \frac{112}{2.63}\\\\m = 42.6[/tex]
Thus mass of object is 42.6 kg
Answer:
42.6kg Is correct
Explanation:
I’m doing it in science class right now
A 0.1 kg apple drops 2m hitting a spring. The spring deforms 0.1m.
What is the spring constant ?
Answer:
392 N/m
Explanation:
We know that the total mechancial enery will be conserved from when the apple drops to when it hit the spring. Therefore, we can set the potential energy of the apple equal to the elastic potential energy of the spring.
PE = mgh and SE = 1/2kx² — PE is the initial potential energy of the apple and SE is the elastic potential energy of the spring.
mgh = 1/2kx². (.1)(9.8)(2) = (1/2)(k)(.1²), solve for k. k = 392
What is the escape velocity on the Venus ? Venus' mass 4.90*10^ 24 kg and radius is 6.86 * 10 ^ 6 * m
The escape velocity on Venus is 9761 m/s
Explanation:
The escape velocity from a planet is the speed that an object on the surface of that planet must have in order to completely escape the gravitational field of the planet.
Mathematically, it is calculated as
[tex]v=\sqrt{\frac{2GM}{R}}[/tex]
where
G is the gravitational constant
M is the mass of the planet
R is the radius of the planet
For Venus, we have:
[tex]M=4.90\cdot 10^{24}kg[/tex] is the mass
[tex]R=6.86\cdot 10^6 m[/tex] is the radius
Substituting, we find the escape velocity on Venus:
[tex]v=\sqrt{\frac{2(6.67\cdot 10^{-11})(4.90\cdot 10^{24})}{6.86\cdot 10^6}}=9761 m/s[/tex]
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A car increases its speed from 4.20 m/s to 8.60 m/s over 3.20 seconds. What is the car’s acceleration?
Answer:1.375metre per second square
Explanation: acceleration=(final velocity-initial velocity)÷time
acceleration=(8.6-4.2)÷3.2
Acceleration=4.4÷3.2
Acceleration=1.375 metre per second square
A roller coaster car rapidly picks up speed as it rolls down a hill. As it starts down the hill, its speed is 4 m/s. But 3 seconds later, at the bottom of the hill, its speed is 22 m/s. What is its average acceleration?
The acceleration is [tex]6 m/s^2[/tex]
Explanation:
The acceleration of an object is the rate of change in velocity, and it is given by the equation
[tex]a=\frac{v-u}{t}[/tex]
where
v is the final velocity
u is the initial velocity
t is the time needed for the velocity to change from u to v
For the roller coaster in this problem, we have
u = 4 m/s
v = 22 m/s
t = 3 s
Substituting, we find
[tex]a=\frac{22-4}{3}=6 m/s^2[/tex]
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A 2000 kg car drives around a circular exit ramp with a radius of 30 meters. The car drives all the way around the ramp in 10 seconds. How fast is the car driving?"
Answer:
The car is driving at the speed of 18.85 meters per seconds.
Explanation:
Given:
The radius of the circular exit ramp = 30 meters
Mass of the car = 2000 kg
Time = 10 seconds
To Find :
The Speed of the car = ?
Solution:
We know that speed = [tex]\frac{distance}{time}[/tex]---------------(1)
Here the distance is the circumference of the circular exit ramp
Then circumference =[tex]2 \pi r[/tex]
where r is the radius
On substituting the values
Distance = [tex]2\pi(30)[/tex]
Distance = 188.5 meters------------------------(2)
Substituting (2) in (1)
speed =[tex]\frac{188.5}{10}[/tex] seconds
Speed = 18.85 meters per seconds