Answer:
The centripetal acceleration, [tex]a_c = 1280 m/s^2[/tex]
Explanation:
Centripetal acceleration is given by the formula:
[tex]a_c = \frac{v^2}{r}[/tex]
Where the speed of the ball, v = 16 m/s
Length of the string, r = 0.2 m
Substituting these parameters into the centripetal equation above:
[tex]a_c = \frac{16^2}{0.2}\\a_c = \frac{256}{0.2}\\a_c = 1280 m/s^2[/tex]
The weight of the buggy was 40 N on Mars. When the buggy landed on Mars it rested on an area of 0.025 m2.Calculate the pressure exerted by the buggy on the surface of Mars. Give the unit.
Answer:
P = 1600 W
Explanation:
The weight of the buggy on Mars is 40 N.
It landed on area of 0.025 m^2.
Pressure is given as force per unit area:
P = F / A
where F = force
A = area
Weight is a force, therefore, the pressure exerted by the buggy on that surface of Mars is:
P = 40 / 0.025
P = 1600 W
Sound travels at approximately 1,500 m/s in sea water. How far will a sonar pulse travel in 90 s?
Answer:
135,000 m
Explanation:
(1500 m/s) (90 s) = 135,000 m
The distance travelled by sonar pulse will be 135,000 m. Distance is a numerical representation of the distance between two objects or locations.
What is wavelength ?The distance between two successive troughs or crests is known as the wavelength. The peak of the wave is the highest point, while the trough is the lowest.
The wavelength is also defined as the distance between two locations in a wave that have the same oscillation phase.
The length of a wave is measured in its propagation direction. The wavelength is measured in meters, centimeters, nanometers, and other units since it is a distance measurement.
The distance travelled by sonar pulse is found as;
[tex]\rm d = v \times t \\\\ \rm d = 1500\times 90 \\\\ \rm d = 135,000 \ m[/tex]
Hence, the distance travelled by sonar pulse will be 135,000 m.
To learn more about the wavelength, refer to the link;
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What happens when you decrease the thrust on your scooter? A. You stop B. Nothing happens C. You fall over D. You speed up Reset Selection
Answer:
you fall over
Explanation:
its not D
i already tried it
When you decrease the thrust on your scooter by fall over. The correct option is D.
What is thrust?The thrust is the pressure exerted the on the surface area.
When you decrease the thrust on your scooter by speeding up.
When the speed increases, the thrust decreases.
Thus, the correct option is D.
Learn more about thrust.
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a) What is the meaning of specific heat capacity ?
Explanation:
the heat required to raise the temperature of the unit mass of a given substance by a given amount (usually one degree).
Differences Between light year and astronomical unit in two points .
Answer:
A light year is the distance light travels in a year. ... And an astronomical unit is the average distance between the earth and the sun. So the distance to the sun is by definition one AU. A parsec is the distance at which one astronomical unit subtends an angle of one second of arc.
Answer: A light year is the distance light travels in a year. ... And an astronomical unit is the average distance between the earth and the sun. So the distance to the sun is by definition one AU. A parsec is the distance at which one astronomical unit subtends an angle of one second of arc
Explanation:
How is speed calculated? A)multiply velocity by displacement B)divide velocity by displacement C)multiply distance by time D)divide distance by time
Answer:
D
Explanation:
to work out units for speed, you need to know the unit for distance and time.
Answer:
divide distance by time, so D
Explanation:
I did it on edge
Examples of drawing packages
Answer:
The answer are given above in attachment.
a 35g ball is lifted up from 1.0m to 3.0m. How much work is done?
[tex]\mathfrak{\huge{\pink{\underline{\underline{AnSwEr:-}}}}}[/tex]
Actually Welcome to the Concept of the Work And Energy.
So we here use the formula as,
W= Mgh
so after solving we get as,
W = 0.686 Joules
What does the use of the phrase "the lucky ones"
convey about the author's viewpoint?
What does the phrase "But we never ate enough to
satisfy our hunger" demonstrate about the author?
Answer:
1. He feels worse off.
2. His awareness of the grim situation.
Explanation:
Elie Weisel's memoir "Night" is about the persecution of the jews by the Germans during the worst genocide in world history. The events leading up to the Holocaust and the resulting after-effects through his personal experience provides one of the most prominent witness accounts of the crime.
When Weisel states that "lying down wasn't an option", he reveals how congested space was in the cabin. The "lucky ones" were able to breathe in the fresh air from the window, while the rest have to be satisfied with wherever they are. This reveals his realization of the grim situation inside the over-packed cabin, where there is hardly any space to move.
And when he said that they "never ate enough to satisfy our hunger", he presents the realization and understanding of the grim situation in the train's cabin where eating is not a luxury, but a necessity to stay alive. And for that, they know they have to "economize, to save for tomorrow" rather than just stay full once.
Answer:
1. He feels worse off.
2. His awareness of the grim situation.
Explanation:
does the area of contact effect the frictional force . explain?
Answer:
The force due to friction is generally independent of the contact area between the two surfaces. This means that even if you have two heavy objects of the same mass, where one is half as long and twice as high as the other one, they still experience the same frictional force when you drag them over the ground.
Plz mark 5 star, thanks, and brainliest
Which is defined as a disturbance in matter that carries energy from one place to another? A. a mechanical wave B. a surface wave C. a transverse wave D. a longitudinal wave
Answer:
A. A mechanical wave
Explanation:
A wave is a disturbance which transfers energy from one point to another through a medium, with the average position of the medium remaining constant.
technician a says the charging system is needed to keep the battery fully charged and recharge the battery after starting. technician b say the charging system supplies all the vehicle's electrical current needs after the engine starts. who is correct?
Answer:
Technician A is correct
Explanation:
The statement "charging system is needed to keep the battery fully charged and recharge the battery after starting" is correct
from technician's B point of view, that the charging system supplies electrical current needs after engine start is incorrect.
In-fact the charging system is dedicated to the battery alone, the electrical needs of the system is gotten from the battery.
The capacitance of a Pt-n-type GaAs Schottky diode is given by 1 (C(μF))2 = 1.0 × 105 − 2.0 × 105 V The diode area is 0.1 cm2. Calculate the built-in voltage Vbi, the barrier height, and the doping concentration
Answer:
built in potential Vbi = +0.5V
barrier height = 0.139 V
doping concentration = 5.39 × 10²³cm³
Explanation:
What is the measure, in degrees, of the acute angle formed by the minute hand and the hour hand on a standard clock when it indicates $9$:$40$
Answer:
9.666666º
Explanation:
In this exercise we must transform from hexadecimal units and decimal units.
For this we must take into account that in the sexagesimal system the base is 60 and in the decimal system the base is 10. This means that by taking 60 minutes we have a degree
transform
9º 40 ’a Aº
we use a direct proportion rule, where 60 minutes is equivalent to 10 decinal minutes
40 ’[hexadecimals] = 40‘ (10/60) = 6,666 ’[decimals]
let's take these pleasant decimal minutes
6.666 ’= 6.6666 (1/10) = 0.66666º
we already have all the units in degrees, we can add them
9º + 0.666666º = 9.666666º
A baboon steals an apple and runs to a nearby boulder 10.0\,\text m10.0m10, point, 0, start text, m, end text to its left. The baboon reaches the boulder in 1.0\,\text s1.0s1, point, 0, start text, s, end text with a constant acceleration of 20.0\,\dfrac{\text m}{\text s^2}20.0 s 2 m 20, point, 0, start fraction, start text, m, end text, divided by, start text, s, end text, squared, end fraction leftward. What was the baboon's initial velocity when it started running to the boulder?
Given that,
Distance = 10 m
Time = 1.0 sec
Acceleration a =20 m/s²
We need to calculate the baboon's initial velocity
Using equation of motion
[tex]s=ut+\dfrac{1}{2}at^2[/tex]
Where, s = distance
t = time
a = acceleration
Put the value in to the formula
[tex]10=u\times1+\dfrac{1}{2}\times20\times1^2[/tex]
[tex]u=10-10[/tex]
[tex]u=0\ m/s[/tex]
Hence, The baboon's initial velocity is zero.
A voltage has been applied across a capacitor. If the dielectric is replaced with another dielectric constant eight times as great and the voltage is reduced to half of what it was, the ENERGY STORED in the capacitor is how many times the original stored energy?
Answer:
2
Explanation:
. A sample of 4 g of cobalt isotope is produced. If the half-life of is 30 years, what will be the mass of the cobalt remaining after 90 years?
Answer:
Half Life = 90/30 = 3 Half lives
Half Life = 30 years
So,
4 g Cobalt after 30 years = 4/2
=> 2 g
2 g Cobalt after next 30 years = 2/2
=> 1 g
1 g Cobalt after next 30 years = 1/2
=> 0.5 g
So, After 90 years, 0.5g of cobalt isotope will be left.
Will mark as BRAINLIEST.... Given that 2 vectors , vector A and vector B , | vector A×vectorB |= vector A .Vector B. Find acute angles between vector A and vector B .
Plzzzzzzzz help !!!!!!!!!!!
Answer:
It depends on the values of A and B vectors and angle between them. then angle between vectors A+B and A -B is 90°.
Explanation:
Which statement describes one feature of Rutherford’s model of the atom? A) The atom is mostly empty space B) The atom cannot be divided into smaller particles. C) Electron clouds are regions where electrons are likely to be found. D) The electrons are located within the positive material of the nucleus.
Answer:
Option C.
Now give the other dude brainliest. He deserves it. :)
A statement that is a feature of the Rutherford’s model of the atom is; "the atom is mostly empty space".
According to Rutherford's model of the atom, the atom is composed mostly of empty space and there is a positive nucleus that contains dense positive particles. This led to the planetary model of the atom.
In his legendary experiment, alpha particles were focused on a thin gold foil. Some of the alpha particles were deflected through large angles. Some were renounced and some went through without deflection.
Learn more:https://brainly.com/question/730256
Which describes reproducibility? The ability of data to be published. The ability of data to be duplicated. The ability of data to be changed. The ability of data to be invalidated.
Answer:
the ability of data to be duplicated well described reproducibility
Explanation:
Reproducibitity of a data is the ability of a data to be produced in multiple times using the same procedure. It is used to test how precise a data is and it's usually known as standard deviation
Reproducibility is the closeness of the understanding between the consequences of measurements of the equivalent measurand did with a similar procedure depicted in the relating logical proof (for example a distribution in a companion surveyed diary).
Answer:
the ability of data to be duplicated well described reproducibility
Average acceleration. Please help!
Answer:
8.43 m/s²
Explanation:
Average acceleration is the change in velocity over change in time.
a = Δv/Δt
First, convert km/h to m/s.
45 km/h = 12.5 m/s
500 km/h = 138.9 m/s
Now find the acceleration.
a = (138.9 m/s − 12.5 m/s) / 15.0 s
a = 8.43 m/s²
An iron nail floats in mercury and sinks in water. Explain why?
Answer:
this is because mercury is more dense than iron nail, while water is less dense than the nail.
Explanation:
Answer:
Density
Explanation:
This is because of difference in densities of iron nail, mercury and water. Iron nail is less dense than mercury so it floats on mercury while it is more dense than water so it sinks!
DOUBLE POINTS
A musical pipe is closed at both ends. Resonance is created. What would happen if one end were opened?
The pitch would increase.
The pitch would stay the same.
The pitch would decrease.
The pitch would increase slowly over time.
Find the force that is necessary! Multiple choice. 8 points. Will give brainliest.
Answer:
F/6.
Explanation:
Let 'M' represent the mass of the block.
Let 'F' represent the force on earth.
Let 'a' represent the acceleration on earth.
Let 'Fm' represent the force on the moon.
Let 'am' represent the acceleration on the moon.
Recall:
Force (F) = mass (M) x acceleration (a)
F = M•a
Making M the subject
M = F/a
But,
Acceleration on the moon (am) = 1/6 acceleration (a) of earth.
am = 1/6a
Fm = M•am
M = Fm/am
M = Fm/(1/6a)
Since the mass of an object is constant,
Therefore,
Mass on earth = mass on moon
Mass on earth (M) = F/a
Mass on moon (M = Fm/(1/6a)
F/a = Fm/(1/6a)
Cross multiply
Fm × a = F × 1/6a
Divide both side by a
Fm = (F × 1/6a) /a
Fm = F/6
Therefore, the force necessary to give the moon bound block the same acceleration is F/6.
Two 0.55-kg basketballs, each with a radius of 19 cm , are just touching. You may want to review (Pages 399 - 401) . Part A How much energy is required to change the separation between the centers of the basketballs to 1.4 m ? (Ignore any other gravitational interactions.)
Answer:
ΔU = - 9,179 10-11 J
Explanation:
For this exercise the two basketballs are linked by gravitational interaction, so we can use gravitational energy
U = - G m₁m₂ / R
In this case the mass is equal and the initial distance is r₁ = 19 cm = 0.19 m
U₁ = - G m² / r₁
let's calculate
U₁ = - 6.67 10⁻¹¹ 0.55² / 0.19
U₁ = - 10,619 10⁻¹¹ J
when its centers are separated it is at r₂ = 1.4 m
U₂ = - 6.67 10⁻¹¹ 0.55² / 1.4
U₂ = - 1.44 10-11 J
the energy between these two points is
ΔU = U₂ - U₁
ΔU = (-1.44 +10.619) 10-11
ΔU = - 9,179 10-11 J
name the three main states of matter
Answer:
The primary distinct forms that matter can exist in is solid, liquid, and gas.
Explanation:
Answer:
liquid, solid, and gas
Explanation:
Which of the following units are equivalent to newtons?
A. kg•m/s
B. kg
C. m/s^2
D. kg•m/s^2
Answer:
B. kg
Explanation:
Which of the following units are equivalent to newtons?
A. kg•m/s
B. kg
C. m/s^2
D. kg•m/s^2
How can you prove the mechanical nature of sound by a simple experiment
Answer:
That is, mechanical waves cannot travel through a vacuum. This feature of mechanical waves is often demonstrated in a Physics class. A ringing bell is placed in a jar and air inside the jar is evacuated. Once air is removed from the jar, the sound of the ringing bell can no longer be heard.
It takes 12.8 N of force to pull the
spring in a toy dart gun back
0.0715 m. What is the spring
constant of the spring?
(Unit = N/m)
Answer:
179.02N/m
Explanation:
spring constant = force/extension
(12.8)/(0.0715)= 179.02N/m
A ball is projected upward at time t = 0.0 s, from a point on a roof 70 m above the ground. The ball rises, then falls and strikes the ground. The initial velocity of the ball is What is the velocity of the ball when it is above the ground? −89 m/s − 72 m/s − 36 m/s − 107 m/s − 54 m/s
Answer:
The velocity of a ball will be "-70.13 m/s".
Explanation:
The given values are:
u = 70 m
t = 0.0 s
g = a = -9.8 m/s²
s = -1 m
v = ?
As we know,
The equation of motion will be:
⇒ [tex]v^2-u^2=2as[/tex]
On substituting the estimated values, we get
⇒ [tex]v^2-(70)^2=2\times (-9.8)\times (-1)[/tex]
⇒ [tex]v^2-4900=19.6[/tex]
⇒ [tex]v^2=19.6+4900[/tex]
⇒ [tex]v^2=4919.6[/tex]
⇒ [tex]v=\sqrt{4919.6}[/tex]
⇒ [tex]v=70.13 \ m/s[/tex]
In downward direction, it will be:
⇒ [tex]v=-70.13 \ m/s[/tex]
