Answer:
See explanations below
Explanation:
Force = m(v-u)/t
mass m = 1.5*10^3kg = 1500kg
v = 30m/s
u = 10m/s
Time t = 15secs
F = 1500(30-10)/15
F = 1500(20)/15
F = 100 * 20
F = 2000N
Force acting on it is 2000N
momentum = mass * velocity
final momentum = 1500 * 30
final momentum = 45000kgm/s
initial momentum = 1500 * 10
initial momentum = 15000kgm/s
The initial momentum, Final momentum and net force acting on the body are 15000 kgm/s, 45000 kgm/s, and 2000 N respectively.
To solve for initial momentum, Final momentum, and average force, we use the formulas below.
⇒ Formulas
M = mu................. Equation 1M' = mv................... Equation 2F = M'-M/t................ Equation 3⇒ Where:
M = Initial momentum of the carM' = Final momentum of the caru = Initial velocity'v = Final velocityt = timeF = net force acting on the car.From the question,
⇒ For The Initial momentum
m = 1.5×10³ kgu = 10 m/s east⇒ Substitute these values into equation 1
M = 1.5×10³×10M = 15000 kgm/sAlso for Final momentum,
⇒ Given:
v = 30 m/s⇒ Substitute into equation 2
M' = 1.5×10³×30M' = 45000 kgm/sAnd finally for net force,
⇒ Given:
t = 15 seconds⇒ substitute into equation 3
F = (45000-15000)/15F = 30000/15F = 2000 NHence,The initial momentum, Final momentum and net force acting on the body are 15000 kgm/s, 45000 kgm/s and 2000 N respectively.
Learn more about momentum mere: https://brainly.com/question/1591712
Cutting down the forest reduces the size of animal habitats, increases erosion, and results in an increase in the amount of carbon dioxide in the atmosphere. In order to stop the harmful effects of cutting down trees, humans can A. clean up litter along the sides of the road. B. clear away the tree trunks and leave the land bare. C. dig up the land and use it as a landfill. D. plant more trees where forests are cut down.
Answer: D. plant more trees where forests are cut down.
Explanation:
Deforestation has to do with the cutting down of trees. Cutting down the forest reduces the size of animal habitats, increases erosion, and results in an increase in the amount of carbon dioxide in the atmosphere.
Ok order to tackle the above, it is necessary that we should plant more trees where forests are cut down.
. Si mi mejor amigo vive a 100 metros de mi casa (una cuadra aproximadamente) y sabe qué cuando pongo una canción determinada es porque me voy a poner a bailar ¿Cuándo escuchará más rápido la música mi amigo en un día que la temperatura este en 27°C o en 36°C?
Answer:
Nuestro mejor amigo escuchará la música más rápido a una temperatura de 36 ºC (309.15 K)
Explanation:
Supongase que el aire se comporta como un gas ideal y que experimenta un proceso adiabático, entonces la velocidad del sonido ([tex]v[/tex]), medida en metros por segundo, queda traducida en la siguiente fórmula:
[tex]v = \sqrt{\frac{\gamma \cdot R_{u}\cdot T}{M} }[/tex] (1)
Donde:
[tex]\gamma[/tex] - Coeficiente de dilatación térmica, sin unidad.
[tex]R_{u}[/tex] - Coeficiente universal de los gases ideales, medido en kilogramo-metros cuadrados por mol-Kelvin-segundo cuadrado.
[tex]T[/tex] - Temperatura, medida en Kelvin.
[tex]M[/tex] - Masa molar, medida en kilogramos por mol.
Como se puede ver, la velocidad del sonido es directamente proporcional a la raíz cuadrada de la temperatura. Por tanto, nuestro mejor amigo escuchará la música más rápido a una temperatura de 36 ºC (309.15 K)
THE RIGHT ANSWER WILL RECEIVE A BRAINLESS AND POINTS AND THANKS!!! THE RIGHT ANSWER WILL RECEIVE A BRAINLESS AND POINTS AND THANKS!!! What is the fundamental frequency of a mandolin string that is 42.0 cm long when the speed of waves of the string is 329 m/s? with working outs
Answer:
[tex]f_{o}[/tex] = 391.67 Hz
Explanation:
The sound of lowest frequency which is produced by a vibrating sting is called its fundamental frequency ([tex]f_{o}[/tex]).
The For a vibrating string, the fundamental frequency ([tex]f_{o}[/tex]) can be determined by:
[tex]f_{o}[/tex] = [tex]\frac{v}{2L}[/tex]
Where v is the speed of waves of the string, and L is the length of the string.
L = 42.0 cm = 0.42 m
v = 329 m/s
[tex]f_{o}[/tex] = [tex]\frac{329}{2*0.42}[/tex]
= [tex]\frac{329}{0.84}[/tex]
[tex]f_{o}[/tex] = 391.6667 Hz
The fundamental frequency of the string is 391.67 Hz.
Lightning McQueen races with an average speed of 125 miles per hour. He drives 400 miles in a
race, how much time does it take him to complete the race?
Please help 20 points!!!!
Answer:
3.2 hours
Explanation:
400÷125=3.2
3.2 or 3 hours and 12 minutes.
Garen is climbing stairs to the castle. He travels a distance of 350 stairs in 5 minutes of time.
What is his speed?
Please help ASAP!!!
Calculate equivalent resistance in the following between points P and Q
[tex] \sf{(i) \: We \: are \: given \: a \: figure \: of \: Series \: Circuit. }[/tex]
[tex] \sf{Here \: Resistances \: are ,}[/tex]
[tex] \sf• \: R_{1} =3 Ω[/tex]
[tex] \sf• \: R_{2} =3Ω[/tex]
[tex] \sf• \: R_{3} =3Ω[/tex]
[tex] \sf{We \: know \: the \: formula \: of \: the \: Equivalent \: Resistance \: for \: Series \: Circuit, }[/tex]
[tex] \bf \orange {\bigstar {\: R_{s} = R _{1} + R _{2} + R_{3}+...+ R_{n}}}[/tex][tex] \sf ⇒ R_{s} =(3 + 3 + 3)Ω[/tex]
[tex] \sf \therefore R_{s} =9Ω[/tex]
[tex] \sf \pink{ \boxed{Answer : 9 Ω.}}[/tex]
[tex] \\ \\ [/tex]
[tex] \sf{(ii) \: We \: are \: given \: a \: figure \: of \: Parallel \: Circuit. }[/tex]
[tex]\sf{Here \: Resistances \: are ,}[/tex]
[tex] \sf• \: R_{1} =3 Ω[/tex]
[tex] \sf• \: R_{2} =3 Ω[/tex]
[tex] \sf• \: R_{3} =3 Ω[/tex]
[tex] \sf{We \: know \: the \: formula \: of \: the \: Equivalent \: Resistance \: for \: Parallel \: Circuit, }[/tex]
[tex] \bf \orange {\bigstar {\: \frac{1}{R_{p}} = \frac{1}{R _{1}} + \frac{1}{R_{2}} + \frac{1}{R_{3}}+...+\frac{1}{R_{n}} }}[/tex][tex] \sf⇒ \frac{1}{ R_{p} } = \frac{1}{3} + \frac{1}{3} + \frac{1}{3} [/tex]
[tex] \sf⇒ \frac{1}{ R_{p} } = \frac{1 + 1 + 1}{3} [/tex]
[tex] \sf⇒ \frac{1}{ R_{p} } = \frac{3}{3} [/tex]
[tex] \sf⇒ \frac{1}{ R_{p} } = 1[/tex]
[tex] \sf \therefore R_{p} = 1Ω[/tex]
[tex] \sf \pink{ \boxed{Answer : 1 Ω.}}[/tex]
Which one of these contains two carbon atoms and six hydrogen atoms
A stalled car is pushed with a force of 342 N from rest. How far does the car travel in 12 seconds if its mass is 989 kg?
Answer:
Roughly 25 meters
Explanation:
Use the formula D=1/2*a*t^2 where d=distance, a=acceleration, and t=time
Plug in all the variables we know...
D=1/2*a*12^2
in order to solve for acceleration, we use the formula F=ma where F=force, m=mass, and a=acceleration.
Plug in known variables,
342N=989kg*a
solve for a and we get...
342N/989kg=a
Now that we know the acceleration, we can plug that into our original equation and solve for distance.
D=1/2*342N/989kg*12s^2
Simplify,
D=72s^2*342N/989kg
D=72s^2*342kgm/s^2/989kg
D=72s^2*342m/s^2/989
D=72*342m/989
D=24624/989 meters, or 24.898meters which rounds up to 25.
The ________________of an element is the average mass of the element’s ____________________.
Answer:
The average atomic mass (sometimes called atomic weight) of an element is the weighted average mass of the atoms in a naturally occurring sample of the element. Average masses are generally expressed in unified atomic mass units (u), where 1 u is equal to exactly one-twelfth the mass of a neutral atom of carbon-12.(I hope this helps!)
Mechanical Advantage!
Need help fast.
name two types of sound wave
Explanation:
two types of sound wave
transverse wave Longitudinal waveIdentify the two layers of the earth in which the actual temperature is hotter than the melting point
Answer:
outer core.....
The two layers of the earth where the actual temperature is hotter than the melting point is outer and inner core.
Layers of the earthThe Earth is separated into four layers.
These layers are the crust, the mantle, the outer core, and the inner core.
The hottest layer is the inside of the Earth.
The inner core is more hot than the outer core.
The force on the inner core is higher.
Therefore we can conclude that both the inside layers of the earth are hotter than the melting point.
Learn more about the Earth’s crust here:
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A large, heavy cargo container is taken from the surface of the Earth and
brought to the Moon to begin building a base camp. What is MOST different
about this cargo container on the Moon?
a
b
On the Moon, the cargo container has a different volume.
On the Moon, the cargo container has a different shape.
On the Moon, the cargo container has a different mass.
On the Moon, the cargo container has a different weight.
с
d
Answer:
D
Explanation:
A different weight
Why would a tuba have a lower pitch than a trumpet. Be sure to discuss air molecules in your answer!
Answer:
The tuba is the biggest, and among the newest, of all the brass instruments. Tuba players create the low-pitched sound by making a kind of "buzz" with their breath against the mouthpiece and pressing the tuba's valves to form notes.
Explanation:
in other words it because less air molecules are abloe to go through the mouth peiece of the tuba
Help anyone?
Moving causes your muscles to release molecules, which helps process the fats and sugars you eat. If you don't do this, it can cause:
a.
weight gain
b.
heart disease
c.
tight hips
d.
varicose veins
Answer:
A
Explanation:
I thinks is A Im pretty sure its the right answer.
What conclusion can be drawn from the fact many of the best international players want to play in the NBA
Answer:
The NBA is a place the best players want to show off their talents at and possibly be very successful.
Explanation:
The players would like fame, the games, and fans that would cheer their name.
A force of 3kN acts on a car to make it accelerate by 1.5m/s/s. What is the mass of the car?
Answer:
2
Explanation:
To find force it's force = mass times acceleration so to find mass you would divide force by acceleration
If the initial speed of the ball was increased, the time of flight of the ball would
1) decrease 2) increase 3) remain the same
Answer:2 increase
Explanation:
A girl walks 5km due north,then in the direction of 60° of northeast towards her final destination.If the magnitude of her resultant displacement is 8km,how far she must have travelled in north east direction?
Answer:
4.2 km
Explanation:
A triangle is a polygon with three sides and three angles. There are different types of triangles such as isosceles triangle, scalene triangle, equilateral triangle and right angled triangle.
Sine rule states that for a triangle with angles A,B and C and corresponding opposite sides a, b, and c, the following formula holds:
[tex]\frac{a}{sin(A)}=\frac{b}{sin(B)}=\frac{c}{sin(C)}[/tex]
Let the starting point be A, hence the side opposite to the angle = a = distance travelled in north east direction.
Let the point of 60° of northeast be B = 90° + (90° - 60°) = 120°, hence the side opposite to the angle = b = resultant displacement = 8 km.
Let C be the endpoint, hence the side opposite to the angle = c = distance travelled north = 5 km
Using sine rule:
[tex]\frac{b}{sin(B)}=\frac{c}{sin(C)} \\\\\frac{8}{sin(120)}=\frac{5}{sin(C)} \\\\sin(C)=\frac{5*sin(120)}{8} =0.5412\\\\C=sin^{-1}(0.5412)=32.8^o\\\\[/tex]
∠A + ∠B + ∠C = 180° (sum of angle in a triangle)
∠A + 120 + 32.8 = 180
∠A = 27.2°
[tex]\frac{b}{sin(B)}=\frac{a}{sin(A)} \\\\\frac{8}{sin(120)}=\frac{a}{sin(27.2)} \\\\a=\frac{8*sin(27.2)}{sin(120)} \\\\a=4.2\ km[/tex]
Therefore she travelled 4.2 km in the north east direction
what energy change takes place when the cell absorbs sunlight
Answer:
It is called photosynthesis.
Explanation:
Properties of helium
Answer:
Helium has many unique properties: low boiling point, low density, low solubility, high thermal conductivity and inertness, so it is use for any application which can explioit these properties. Helium was the first gas used for filling balloons and dirigibles
Using the picture below, what is the displacement of the triangle?
Answer:
i think it is 40 kilometers in the positive direction... if not im sorry
Explanation:
What is the velocity of an object with a mass of 4 kg and a momentum of 24 kg.m/s
Please help
Answer:
6m/s
Explanation:
momentum = mass × change in velocity
∆p =m(v)
24 = 4(v)
V =>24/4 = 6m/s
Some knowledge of radioactivity would be useful for understanding which of
the following?
Check all that apply.
A. certain medical procedures
n B. radon in homes
C. rocket boosters on the space shuttle
O D. determining ages of fossils
SUBMIT
Some knowledge of radioactivity would be useful for understanding the certain medical procedures. Option A is correct.
What is radioactivity?The act of producing radiation spontaneously is known as radioactivity. This is accomplished by an unstable atomic nucleus that want to give up some energy in order to move to a more stable form.
Radiation is being employed to assist humanity in medical, academia, and industry, as well as to generate power.
Radiation is also important in agriculture, archaeology, space exploration, law enforcement, geology a variety of other fields.
Some knowledge of radioactivity would be useful for understanding the certain medical procedures.
Hence, option A is correct.
To learn more about the radioactivity, refer to the link;
https://brainly.com/question/1770619
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on what factors do pressure depend
Answer:
*pressure of solid depends on:
1/Magnitude of the force.
2/contact area.
*pressure of liquid depends on:
1/Depth inside the fluid.
2/density of the fluid.
3/Acceleration due to gravity.
___________________ is the opposition to the flow of electric charge. (Resistance or Electric power)
Answer:
The answer is Resistance
Answer:
Resistance
Explanation:
it opposes the flow of energy
You have 12 Mohms of resistance, 9 amps of current, what is the voltage within the circuit?
[tex] \sf• \: We \: have \: 12 \: ohms \: of \: resistance, \: 9 \: amps \: of \: current.[/tex]
[tex] \\ [/tex]
[tex]\bf{ \underline{To \: Find :- }}[/tex][tex] \sf{• \: The \: Voltage\: within \: the\: circuit. }[/tex]
[tex] \\ [/tex]
[tex] \huge\bf{ \underline{ Solution:- }}[/tex]
[tex] \sf According \: to \: the \: question, [/tex]
[tex] \sf• \: Current \: (I) = 9 \: Amps.[/tex]
[tex] \sf• \: Resistance \: (R) = 12 \: Ω[/tex]
[tex] \sf{We \: know \: that, }[/tex]
[tex] \bf \red{ \bigstar{ \: V = IR }}[/tex]
[tex] \rightarrow \sf V = 9 \times 12[/tex]
[tex] \rightarrow \sf V = 108[/tex]
[tex] \\ [/tex]
[tex] \sf \purple{Therefore, \: the \: voltage \: within \: the \: circuit \: is \: 108 \: v \: .}[/tex]
The attaction between magnets is a chemical property.
True
Or
False
Answer:
false its an attraction property
Answer:
True
The attraction is a chemical property.
the graph shows how temperature varies with time as is it heated (not drawn to scale). explain what is happening to the substance in sections AB and BC of the graph
Answer:
The substance is increasing
Hope this helps!
In AB and BC of the graph, the substance is first under the constant temperature condition then under section BC the linear increment in the temperature with the time.
What is a graph ?A graph is a pattern consisting of a collection of elements, some of which are connected in some way.
In the isothermal process, the change in the temperature is zero. While if temperature is increasing along the time, a linear relationship is found.
Hence, in AB and BC section of the graph, the substance is first under the constant temperature condition then under section BC the linear increment in the temperature with the time.
To learn more about the graph, refer to the link;
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you are on a walk moving at 3m/s forward what would happen i you stepped off onto the floor? what if you stepped onto another walkaway moving with the same velocity?
Answer:
1) The person ma tend to fall
2) The person will remain upright
Explanation:
1) According to Newton's first law of motion, an object will continue in its state of rest or maintain its uniform motion on a straight line unless acted on by a force
Therefore, when a person steps off onto the floor from a walkway moving at 3 m/s, the friction between the floor and the person's feet prevents the forward motion of the feet, however the person's upper body will tend to continue with the forward motion, and the person may tend to tilt and fall over
2) If the person steps onto another walkway moving with the same velocity, the initial velocity of all parts of the person's body is maintained, such that the person will continue in his uniform motion without experiencing any force and therefore, the person will remain upright