because i said so
the answer is 80 diveded by 8 equalzzzz
Transforme: a) 2 km em m b) 1,5 m em mm c) 5,8 km em cm d) 0,4 m em mm e) 27 mm em cm f) 126 mm em m g) 12 m em km
Answer:
a) 2000 m
b) 1500 mm
c) 580000 cm
d) 400 mm
e) 2.7 cm
f ) 0.126 m
g) 0.012 km
Explanation:
Transform
a) 2km to m
1 km = 1000m
hence : 2 km = 2 * 1000 = 2000 m
b) 1.5m to mm
1 m = 1000 mm
hence: 1.5 m = 1.5 * 1000 = 1500 mm
C) 5.8 km to cm
1 km = 100000 cm
hence ;5.8 km = 5.8 * 100000 = 580000 cm
D) 0.4 m to mm
1 m = 1000 mm
hence; 0.4 m = 0.4 * 1000 = 400 mm
E) 27 mm to cm
1 mm = 0.1 cm
hence ; 27 mm = 27 * 0.1 = 2.7 cm
F) 126mm to m
1 mm = 0.001 m
hence ; 126 mm = 126 * 0.001 = 0.126 m
G) 12m to Km
1 m = 0.001 km
hence ; 12 m = 12 * 0.001 = 0.012 km
why is the time every 15° eastward one hour ahead?..
Explanation:
The reason time zones are 15 degrees wide is because there are 24 hours and 360/24 = 15. As you move east by 15 degrees the sun’s position in the sky changes relative to us and it looks an hour later in the day, so we advance our clocks to match the sun’s position.
So every 15° eastward one hour ahead.
Is this spring or winter?
A dwarf planet is likely to
O A. have a bright tail and a glowing nucleus
O B. have chunks of rocks and that never clump together
O C. have a liquid hydrogen layer that surrounds a solid core
O D. have objects similar in mass orbiting nearby
Answer:
a have a bright tail and a glowing nucleus
A dwarf planet is most likely to have a bright tail and a glowing nucleus. Thus, the correct option is A.
What is a dwarf planet?A dwarf planet is a small planetary-mass object which is in direct orbit that of the Sun, it is smaller than any of the eight classical planets however it is still a world in its own right.
The prototypical dwarf planet is Pluto. The dwarf planets is that the geologically active bodies, which is an expectation that was borne out in 2015 by the Dawn mission to Ceres and the New Horizons mission to Pluto.
Dwarf planets always being in orbit around the Sun. They are not being a satellite of a planet. They having a mostly round shape due to its own gravity. They also have not cleared its neighboring region of debris.
Therefore, the correct option is A.
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Kerry drops her iPhone accidently as she is standing on an overview. How fast is the iPhone moving after 3s?
Answer:
really fast? xP
Explanation:
A body is at equilibrium under the action of three forces. One force is 10N acting due east and one is 5N in the direction 60° north east. What is the magnitude and direction of the third force?
Answer:
If the body is in equilibrium the two forces add up and the third is the opposite of the resultant.
F(1x)=F(1)=10 N
F(2x)=F(2)cos60=5•0.5=2.5 N
F(2y) =F(2)sin60 = 5•0.866= 4.33 N
F(3x) =- F(x)=- (10+2.5 )= -12.5 N
F(3y) =- F(2y)= - 4.33 N
F(3) = sqrt{ F(3x)²+F(3y)²} =13.23 N
tan φ = F(3y)/F(3x) =4.33/12.5=0.364
φ = 19.1⁰ (south-west)
Explanation:
Which is a benefit of strength training? O Decreased blood flow to muscles O Improved oxygen delivery Flexibility of tendons and joints O Increased lean muscle tissue
Answer:
Increased lean muscle tissue.
Explanation:
I hope this helps :) Tell me if I am wrong!
Answer:
Increased lean muscle tissue.
Explanation:
i took the test!
A 2750 kg helicopter flies horizontally at constant speed. Air resistance creates a 7510 n backward force. What is the magnitude of the lift force created by the propellers
Answer:
Explanation:
Let lift force F be created by propellers at angle of Ф with the horizontal .
The vertical component of this force will balance the weight of helicopter and horizontal component will balance the air resistance .
F sinФ = mg = 2750 x 9.8 = 26950 N
F cosФ = 7510 N
Squaring and adding ,
F² = 26950² + 7510²
= 726302500 + 56400100
= 782702600
F = 27976.82 N .
Under constant acceleration, the average velocity of a particle is half the sum of its initial and final
velocities. Is this still true if the acceleration is not constant? Explain.
Answer:
It is not still true that the average velocity of the particle is equal to half the sum of the initial and final velocities when the acceleration of the particle is not constant
Explanation:
The motion of a particle under constant acceleration, 'a', is be given by the following kinematic equations;
v² = u² + 2·a·s
v = u + a·t
Where;
v = The final velocity of the particle
u = The initial velocity of the particle
a = The acceleration of the particle
s = The distance through which the particle travels
t = The time of motion of the particle
By simplifying the above equation, we have;
v² - u² = 2·a·s
(v² - u²)/(2·a) = s
(v - u) × (v + u)/(2 × a) = s
((v - u)/a) × ((v + u)/2) = s
From v = u + a·t, we have;
t = (v - u)/a
∴ ((v - u)/a) × ((v + u)/2) = t × ((v + u)/2) = s
∴ ((v + u)/2) = s/t
The average velocity = (Total distance traveled by the particle) ÷ (The time of travel of the particle)
∴ The average velocity = s/t = ((v + u)/2) = Half the sum of the initial and final velocity
However, it is not still true that the average velocity of the particle is equal to half the sum of the initial and final velocities when the acceleration of the particle, 'a', is not constant, as the velocity time graph is no longer a straight line graph and the distance traveled by the particle, 's', which is the area under the velocity time graph, 'A', (given by the sum of area of the triangle and the rectangle given by the area under straight line graph for constant velocity) cannot be given directly by the product of the time and the average velocity.
an electric heater draws a current of 5 ampere from 220 volt supply.Calculate
(a) its resistance
(b) electrical energy consumed in kwh if it is used for 4 hours
[tex] \bf \underline{Given :-}[/tex]
[tex] \sf{• \: An \: electric \: heater \: draws \: a \: current \: of \: 5 \: ampere \: from \: 220 \: volt \: supply.}[/tex]
[tex] \\ [/tex]
[tex]\bf{ \underline{To \: Find:- }}[/tex]
[tex] \sf• \: ( a) \: lts \: resistance.[/tex]
[tex] \sf• \: (b) \: electrical \: energy \: consumed \: in \: kwh \: if \: it \: is \: used \: for \: 4 \: hours.[/tex]
[tex] \\ [/tex]
[tex]\huge\bf{ \underline{ Solution :-}}[/tex]
[tex] { \boxed{\bf{(a)}}}[/tex]
[tex] \sf• \: Current \: (I) = 5 \: A[/tex]
[tex] \sf• \: Voltage \: (V) = 220 \: v[/tex]
[tex] \bf \red{\bigstar{\: Formula \: of \: Resistance \: (R) = \frac{V}{I} }}[/tex]
[tex] \sf \rightarrow R = \frac{220}{5} [/tex]
[tex] \sf \rightarrow R =44[/tex]
[tex] \bf{Hence, \: it's \: resistance \: is \: \: 44 \: Ω \: .}[/tex]
[tex] \\ \\ [/tex]
[tex] { \boxed{\bf{(b)}}}[/tex]
[tex] \sf• \: Current \: (I) = 5 \: A[/tex]
[tex] \sf• \: Voltage \: (V) = 220 \: v[/tex]
[tex] \bf \red{\bigstar{\: Formula \: of \: Electric \: Power \: (P) = IV }}[/tex]
[tex] \sf \rightarrow P = (5 \times 220) [/tex]
[tex] \sf \rightarrow P = 1100 \:[/tex]
[tex] \\ [/tex]
[tex] \sf \therefore \: P = 1100 \: watt[/tex]
[tex] \sf{• \: Time \: (t) = 4 \: hours }[/tex]
[tex] \bf \red{\bigstar{ \: Formula \: of \: Energy \: (W) = Pt}}[/tex]
[tex] \sf \rightarrow W= 1100 \times 4[/tex]
[tex] \sf \rightarrow W = 4400[/tex]
[tex] \sf \rightarrow W = \frac{4400}{1000} [/tex]
[tex] \sf \rightarrow W = 4.4[/tex]
[tex] \sf \therefore W = 4.4 \: kwh[/tex]
[tex] \bf{Hence, \: Electrical \: Energy \: is \: 4.4 \: kwh.}[/tex]
Answer is 4.4 kwh.
hope it helps you.
Green light travels by what type of wave? (2 points) a Conductive b Electronic c Conducive d Electromagnetic 2
Answer:
Electromagnetic
Explanation:
Electromagnetic waves are those waves that do not require any material medium for propagation. They arise from a vibration of electric and magnetic fields.
The electromagnetic spectrum is comprised of many waves. One of the waves in the spectrum is visible light.
Visible light is in turn composed of seven different wavelengths of which green light is one of them. Hence, green light travels by electromagetic wave.
a plane travels 400km in 3 hours. what is its speed?
A mouse ran 25 meters in 5 seconds, stopped for 10 seconds to eat a piece of cheese, and finally ran another 5 seconds a distance of 15 meters to its home. Calculate the average speed of the mouse.
Answer:
It ran at an average of 2 meters per second.
Explanation:
Which of the following is an example of an opposing force?
A.Gravity pulling a ball down a hill
B.Wind blowing a leaf off of a tree
C.Gravity holding a rock still on the ground
D.Water pushing against someone as they wade through a pool
Can someone help me name the layers.
Answer:
A. Crust
B. Mantle
C. Outer Core
D. Inner Core
Explanation:
Answer:
A. Crust
B. mantle
C. outer core
D. inner core
Explanation:
because it is
How many different atoms are there in a compound?
Answer:
2 or more atoms
Explanation:
yes yes yes yes yes yes yes yes
Answer:
Two or more
Explanation:
It's mostly two but unique structures might compose of more than 2
Two cars start moving from the same point on a rectilinear path at the same time, heading to the same destination 90 km away. The first travels at an average speed of 50 km/h and the second at 60 km/h. Deter- mine the time interval separating the arrival of the two cars to their destination.
Answer:
0.3 hour
Explanation:
From the question given above, the following data were obtained:
Distance travelled = 90 km
Speed of 1st car = 50 km/h
Speed of 2nd car = 60 km/h
Time interval separating the two cars =?
Next, we shall determine the time taken for each car to get to the destination. This can be obtained as follow:
For the 1st car:
Distance travelled (d) = 90 km
Speed of 1st car (S₁) = 50 km/h
Time (t₁) =?
Speed = Distance /time
S₁ = d/t₁
50 = 90 / t₁
Cross multiply
50 × t₁ = 90
Divide both side by 50
t₁ = 90 / 50
t₁ = 1.8 hours
For the 2nd car:
Distance travelled (d) = 90 km
Speed of 2nd car (S₂) = 60 km/h
Time (t₂) =?
Speed = Distance /time
S₂ = d/t₂
60 = 90 / t₂
Cross multiply
60 × t₂ = 90
Divide both side by 60
t₂ = 90 / 60
t₂ = 1.5 hours
Finally, we shall determine the time interval separating the arrival of the two cars. This can be obtained as follow:
Time for the 1st car (t₁) = 1.8 hours
Time for the 2nd (t₂) = 1.5 hours
Time interval separating the two cars (tₛ) =?
tₛ = t₁ – t₂
tₛ = 1.8 – 1.5
tₛ = 0.3 h
Thus, the interval separating the arrival of the two cars is 0.3 hour
In everyday situations, it does seem that a force is needed to keep an object, for example the shopping trolley, moving at a constant speed in a straight line.
Explain why.
[tex]\huge{\textbf{\textsf{{\color{pink}{An}}{\red{sw}}{\orange{er}} {\color{yellow}{:}}}}}[/tex]
An object at rest stays at rest and an object in motion stays in motion at a constant speed and direction unless acted upon by an unbalanced force. ... In the absence of any forces, no force is required to keep an object moving.
Thankshope it helpsIn everyday situations, it does seem that a force is needed to keep an object moving at a constant speed in a straight line because the resistive frictional force acted on every objects against their motion.
What is friction?The resistance provided by surfaces in touch as they move past one another is known as friction.
According to Newton's first law of motion, Unless forced to change its condition by an outside force, every object will continue to be at rest or moving uniformly in a straight line.
But in everyday situations, it does seem that a force is needed to keep an object, for example the shopping trolley, moving at a constant speed in a straight line because of the frictional resistive force acting opposite to the motion. That's why, a force of equal magnitude and opposite direction must be applied on the object, so that, resultant force becomes zero. It can at a constant speed in a straight line.
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Un prisma rectangular con un volumen de 80 m^3 se sumerge hasta la mitad en agua, calcular la fuerza de empuje que recibe.(rho_(del agua)=1000 kg/m^3)
Answer:
400 kN
Explanation:
El principio de Arquímedes establece que, cuando un cuerpo está total o parcialmente sumergido en un fluido, experimenta un empuje hacia arriba que es igual al peso del fluido desplazado.
Dado que;
Volumen del bloque = 80m ^ 3
Densidad del agua = 1000 kg / m ^ 3
Empuje hacia arriba = 1/2 * 80 * 1000 * 10
Empuje hacia arriba = 400 kN
plz help will mark the brainliest
Answer:
yesssssssssssssssssssssssssssssssssssss
Which wave property is related to how loud or soft a sound is?
Answer:Aplitude
Explanation:
a p e x
Someone help me please I need to pass this quiz , this is the only quiz that It making me fail this class !!!
Select the correct items. Click the bottom right arrow to go to the next set . Click the checkmark ( Available on the last set ) to submit all your answers
Slow twitch muscle Fibers
Can contract repeatedly
Only anaerobic sources
Both aerobic & anaerobic
Produce most force
Endurance activities
Fast contraction speed
Fatigue quickly
Only aerobic sources
Speed, strength, power
Fast twitch Type lla muscle Fibers
Only aerobic sources
Fast contraction speed
Speed, strength, power
Only anaerobic sources
Fatigue quickly
Endurance activities
Produce most force
Can contract repeatedly
Both aerobic & anaerobic
Fast twitch type llx muscle Fibers
Can contract repeatedly
Only anaerobic sources
Only aerobic sources
Both aerobic & anaerobic
Fast contraction speed
Produce most force
Fatigue quickly
Endurance activities
Speed, strength, power
Answer:
1. Endurance activities
Only aerobic source
2. Can contract repeatedly
Speed strength and power.
Both aerobic and anaerobic sources
3. Fast contraction speed
Only anaerobic sources
Produce most force
Fatigue quickly
Speed, strength and power
Explanation:
I hope this helps. Although, I'm about 80% sure of the answer.
a body is thrown at an angle 30°to the horizontal with kinetic energy 40J.atbthe highest point of its motion the kinetic energy will be?
A bottle of water with mass 0.9 kg is left out in the sun, the radiation from the sun warms up the water bottle. If the water bottle was initially 10°C and the sun provided 120,000 J of thermal energy, calculate the final temperature of the water. Use C = 4182 j/kgK for the specific heat of water.
Answer:
Final temperature, T2 = 314.9 Kelvin
Explanation:
Given the following data:
Mass = 0.9kg
Initial temperature, T1 = 10°C to Kelvin = 10 + 273 = 283K
Quantity of heat = 120,000 J
Specific heat capacity = 4182 j/kgK
To find the final temperature;
Heat capacity is given by the formula;
[tex] Q = mcdt[/tex]
Where;
Q represents the heat capacity or quantity of heat.
m represents the mass of an object.
c represents the specific heat capacity of water.
dt represents the change in temperature.
Making dt the subject of formula, we have;
[tex] dt = \frac {Q}{mc} [/tex]
Substituting into the equation, we have;
[tex] dt = \frac {120000}{0.9*4182} [/tex]
[tex] dt = \frac {120000}{3763.8} [/tex]
dt = 31.9K
Now, the final temperature T2 is;
But, dt = T2 - T1
T2 = dt + T1
T2 = 31.9 + 283
T2 = 314.9 Kelvin
What is the intensity of the electric current in one coil, if the number of the coils is 10, length of the coil is 5m, and magnetic induction is 8T?
Answer:
I think the answer is D...
Explanation:
Question 3 of 10
Which planet has the largest gravitational force?
A. Mercury
B. Uranus
C. Jupiter
D. Saturn
SUBMIT
3. Bart ran 5000 meters from the cops and an average speed of 10 meters/second before he got
caught. How long did he run?
Answer:
8 minutes and 20 seconds
Explanation:
5000/10 to get the number of seconds, which is 500, then you convert 500 seconds to minutes and you get 8 minutes and 20 seconds
Which of these is NOT used to create a simple electromagnet?
Battery
Light bulb
Copper wire
battery
Explanation:
Electromagnets can be created by wrapping a wire around an iron nail and running current through the wire. The electric field in the wire coil creates a magnetic field around the nail. In some cases, the nail will remain magnetised even when removed from within the wire coil
Answer:
Light Bulb
Explanation:
I did the quiz and i got it right
what is meant by the resultant force acting on an object?
Answer:
The resultant force is the single force that would produce the same effect on an object as two or more forces that are applied to the object. To find the resultant force, first draw a free body diagram, which is a diagram that shows all the applied forces using arrows in the direction of each force.
which organs could be injured if you broke your ribs select all that apply
A.lungs
B.heart
C.brain
D.spinal column
Answer:
If you break a rib in the middle of your rib cage, the sharp end of bone could puncture a lung. If you break a rib toward the bottom of your rib cage, the sharp end of the bone could cause damage to your liver, kidney, or spleen.
Explanation:
Hope this helped..