Answer:
The cost of electric energy, per week, is $3.15
Explanation:
Given that,
Power = 60 W
Time = 10 hours
Cost of electric energy = $ 0.75
We need to calculate the energy
Using formula of energy
[tex]E=Pt[/tex]
Where, P = power
t = times
Put the value into the formula
[tex]E=60\times10[/tex]
[tex]E=600\ Wh[/tex]
[tex]E=0.6\ kw h[/tex]
We need to calculate the energy consume in a week
Using formula of energy
[tex]E'=0.6\times7[/tex]
[tex]E'=4.2\ kwh[/tex]
We need to calculate the cost of electric energy, per week,
Using energy for cost
[tex]Cost\ of\ 1\ kWh=\$0.75[/tex]
[tex]Cost\ of\ 4,2\ kwh=4.2\times0.75[/tex]
[tex]Cost\ of\ electric\ energy=$ 3.15[/tex]
Hence, The cost of electric energy, per week, is $3.15
Joe runs 30 meters in 5 seconds. He then rests for 15 seconds. Joe runs another 20 meters in 5 seconds. What is joes average speed
Answer:
His average speed is through 4-6.
Explanation:
Because if you divide them both by 5 you get 4 and 6.
If an object starts at rest, what is necessary to make it start moving?
It will need a force acceleration
Energy must be measured in
Answer:
joule
Explanation:
hop it helps give a good rate ples
Answer:
joule
Explanation:
3. What is the instantaneous speed of a car after 3 seconds that is traveling at 30 m/s and accelerates at a constant
rate of 10m/s??
Plz help i need help on my homework
How do stars serve as evidence for the expansion of the universe and the Big Bang theory?
Answer:
The Doppler red-shift of light observed from distant stars and galaxies gives evidence that the universe is expanding (moving away from a central point). This allows for Big Bang Theory, because after a “bang” occurs all of the matter moves away from the point of origin.
place /our live /music / important / has / in / an
Answer:
Music has an important place in our lives.
Which best describes why heat pumps are reversible?
O They can heat and cool an indoor space.
O They involve a metal expanding or contracting against another.
They combust and can also add coolant.
They allow a piston to move up and down.
Answer:
I would say the first one.
A: They can heat and cool an indoor space.
Explanation:
Reversible heat pumps are capable of providing both heating and cooling processes using the same two environments. When heating, they use the external pipes to absorb heat and release that heat into the indoor environment. When cooling, they absorb the heat from indoors and release that heat into the outside environment.
Answer:
A
Explanation:
Why is circular motion at constant speed not a natural state of motion?
The reason behind circular motion at constant speed is not a natural state of motion is centripetal acceleration acting on it.
What is centripetal acceleration?
Centripetal acceleration is a characteristic of an object's motion along a circular path. Centripetal acceleration applies to any item travelling in a circle with an acceleration vector pointing in the direction of the circle's center.
A natural state of motion is that motion where object moves with constant velocity and no acceleration. As in circular motion of an object at constant speed, a constant centripetal acceleration remains, this is not a natural state of motion.
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Anyone get this please help me step by step
Explanation:
Okayyy.. So..
12 pounds = 26.00
1 pound=2.17
Now you have to use cross multiplication method
[tex]1 = 2.17 \\ = 18.00[/tex]
The answer is 8.3
If I'm not mistaken
-A pool ball leaves a 0.70 meter high table with an initial velocity of 2.4 m/s. Predict the time required for the pool ball to fall to the ground.
-A rock is thrown with a velocity of 23.7 m/s horizontally off the top of a bridge and lands in the water 35.0 meters away. What is the vertical velocity just before the rock hits the water below?
-A plane moving at a velocity of 205 m/s drops a piece of cargo which lands 6.5 seconds later. How far did the cargo box land after it's release?
Answer:
0.70+2.4=23.7+35.0=answer
Explanation:
Answer:
First Question:
If the initial velocity is horizontal: It doesn't really matter how fast it is going horizontally if we want to calculate time.
Since it rolled off the table, the initial vertical velocity is 0. The displacement will be -0.7 meters since the table is 0.7 meters high. The acceleration will be -9.8 m/s^2 because that's just earth's gravity.
We can plug the variables into the formula Displacement = Initial Velocity*Time + 1/2*Acceleration*Time^2:
[tex]-0.7 = 0\cdot t + 1/2\cdot-9.8\cdot t^2\\-0.7 = -4.9*t^2\\t^2 = \frac{10}{7} \\t = \sqrt{\frac{10}{7}}[/tex]
Rounded to the nearest hundredths, the answer is 1.2 seconds.
Second Question:
We can use the horizontal variables to find out the time to solve for the vertical velocity.
The acceleration is going to be 0(assuming no air resistance), the initial velocity is going to be 23.7 m/s, and the displacement is going to be 35.0 meters.
Again, we can plug the variables into the formula Displacement = Initial Velocity*Time + 1/2*Acceleration*Time^2:
[tex]35 = 23.7\cdot t + 1/2\cdot 0\cdot t^2\\35 = 23.7\cdot t\\t = \frac{35}{23.7}[/tex]
Rounded to the nearest hundredth, t = 1.48.
Now, we're going to find the vertical variables:
The acceleration will be -9.8 m/s^2 because that's just earth's gravity. The initial velocity will be 0 because the rock was launched horizontally. The time, as calculated before, is 1.48.
Now, we can plug t into the formula Velocity = Initial Velocity + Acceleration *Time:
[tex]v = 0 + -9.8\cdot1.48\\v = -14.504[/tex]
Rounded to the nearest hundredth, the answer is -14.5 meters per second.
Third Question:
Let's find the horizontal variables:
Assuming no air resistance, the final velocity is 205 m/s. The initial velocity will also be 205 m/s. The time will be 6.5 seconds.
We can use the formula Displacement = (Final Velocity+Initial Velocity)/2 * Time. In this case, the final velocity and the initial velocity are the same, so the formula reduces to Displacement = Final Velocity * Time:
[tex]d = 205\cdot6.5\\d = 1332.5[/tex]
Therefore, the answer is 1332 meters.
I really hoped this helped you because I spent more than 1 hour explaining. If you have more questions don't hesitate to ask. If it helped you, please consider giving me brainliest? :)
How much clothes should be applied on 100 cm² area using pressure of 25 Pa
Answer:
hi !
Pressure = Force/Area
Force = Pressure*Area
Pressure = 25 Pa
Area = 100 cm² = 0.01 m²
F = 25*0.01
= 0.25 N
Explanation:
Convert 6.6 meters to centimeters
Answer:
6.6 Meters = 660 Meters
Explanation:
1 Meter = 100 Centimeters
if you put something like apiece of cardboard between a magnet and a iron nail, the magnet still holds the nail. how?
Ruth throws a baseball straight up at 22 m/s. What is the ball's velocity after 1.4 seconds?
Answer: v = 43.98 m/s
Explanation: 22 + 15.7x1.4 = 43.98.
Hope this helps!
You pull a sled with a package on it across a snow-covered flat lawn. If you
apply a force of 65.1 N to the sled, it accelerates at 1.24 m/s2. What is the
combined mass of the package and the sled? (Assume there is no friction.)
Answer:52.5
Explanation:
You pull a sled with a package on it across a snow-covered flat lawn. If you apply a force of 65.1 N to the sled, it accelerates at 1.24 m/s2. The combined mass of the package and the sled m = 52.50 kg
The given data to find Mass,
The force applied to the sled, F = 65.1 N
Acceleration of the sled, a = 1.24 m/s²
What is force?Forces are defined by both strength and direction.
Force is a vector quantity. It is a quantity that is described by Magnitude and Direction. The strength of a force is its magnitude and the direction, well it is the direction the magnitude is applied on the object.
We need to find the combined mass of the package and the sled. Let it is m. Using definition of force as follows :
F = ma
m = F/a
m = 65.1 /1.24
Mass, m = 52.5 Kg.
If you apply a force of 65.1 N to the sled, it accelerates at 1.24 m/s2. The combined mass of the package and the sled m = 52.50 kg
Hence, Option C is the correct answer.
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Debby and Ben took different routes to travel from Point A to Point E. Debby took the
route along A, B, C, D, and E. Ben took the route along A, G, F, and E. Debby and Ben
both took 4 hours to complete their walk. Their routes are shown.
Route in miles
D2 E
End
B2C
li
F
2
LL
3
10
Start
G
A
Which statement is true about Debby and Ben's average speed?
Debby's average speed was twice Ben's average speed,
Ben and Debby's average speed was the same,
Debby's average speed was three times Ben's average speed,
Ben's average speed was twice Debby's average speed.
what is the net force on a car stopped at a stop sign? what is the net force on a car moving in a straight line with a constant speed?
How did the motion of the ball change when John kicked it?
A
The ball continued moving in the same direction and its speed increased.
B
The ball continued moving in the same direction and its speed decreased.
C
The ball changed directions and its speed increased.
D
The ball came to a complete stop.
Answer:
The ball continued moving in the same direction and its speed increased.
When John kicked the ball, this was an example of motion. The ball's force increased because the ball got force from John's leg. So, the answer is option A.
Hope this helps you!
The part of a longitudinal wave where the particles are spread apart is called a______?
Answer:
Rarefaction (I think so..)
The part of a longitudinal wave where the particles are spread apart is called a rarefactions.
What is longitudinal wave?Longitudinal waves are waves in which the displacement of the medium is in the same (or the opposite) direction as the wave propagation and the medium vibration is parallel ("along") to the direction the wave travels.
Because they create compression and rarefaction when passing through a material, mechanical longitudinal waves are also known as compressional or compression waves. They are also known as pressure waves because they cause pressure changes.
The part of a longitudinal wave where the particles are spread apart is called a rarefactions and the part of a longitudinal wave where the particles are closed together is called a compression.
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A bus is moving at a constant speed of 30 m/s. How many hours will it take to travel 200 miles?
Answer:
200/67.1224321241 = 2.97962981482 hours to travel 200 miles.
Hope this helps :)
Explanation:
First, convert the speed of the bus back to km/h so it makes things easier. The bus is going at an unreasonably high seed of 108 km/h and will usually result in a crash caused by the driver being unable to control the bus at such high speeds, even it won’t topple over at an inclination of 28 degrees for double decker buses (when the bus is stationary. If the prototypes can’t meet this requirement, the prototype fails the safety test and won’t be used as a bus for carrying passengers).
If you ignore that problem, we will start to do the calculation. 108 km/h is equal to 67.1224321241 mph, so it would take 200/67.1224321241 = 2.97962981482 hours to travel 200 miles.
2.97962981482 hours is equal to 2 hours, 58 minutes, 46 seconds, 667 milliseconds, 333 microseconds and 352 nanoseconds.
Here is the list of descending order of time magnitude of smaller than one second for extra information.
Decisecond = 0.1 second (one tenth)
Centisecond = 0.01 second (one hundredth)
Millisecond = 0.001 second (one thousandth)
Microsecond = 0.000001 second (one millionth)
Nanosecond = 0.000000001 second (one billionth)
Picosecond = 0.000000000001 second (one trillionth)
Femtosecond = 0.000000000000001 second (one quadrillionth)
Attosecond = 0.000000000000000001 second (one quintillionth)
Zeptosecond = 0.000000000000000000001 second (one sextillionth)
Yoctosecond = 0.000000000000000000000001 second (one septillionth)
Planck time = 0.00000000000000000000000000000000000000000001 second
Planck time is the smallest measurable time interval in theory.
Based on its location on the periodic table, which metal is likely to be less reactive than rubidium and more reactive than calcium?
a) potassium (K)
b) cesium (Cs)
c) magnesium (Mg)
d) titanium (Ti)
Answer:
A i think tell me if i got it right
Explanation:
Based on the location on the periodic table, Potassium (K) is the metal that will be less reactive than rubidium and more reactive than calcium.
The mass of a solid cube is 1370 g, and each
edge has a length of 5.18 cm.
Find the density of the cube.
Answer in units of kg/m3
Answer:
D=m/v
Explanation:
1.37kg/1.3899m cube
0.9927kg meter cube
2. Rusting is an
example of a
a. physical property.
b. physical change.
C. chemical property.
d. chemical change.
Answer:
rusting is a chemical property because it is irreversible it changes the identity of a substance
Answer:
C. chemical property
Explanation:
a chemical property of iron is that it is capable of combining with oxygen to form iron oxide，the chemical name of rust
The variable that you/I the researcher get to choose.
Independent Variable
Dependent Variable
Experimental
Control
Answer:
Independant Variable
the efficiency of transformer is not 100%why?
Answer:
Hysteresis, Eddy current, flux leakage and resistance of winding are those four reasons. It is impossible to overcome this four reasons, Hence transformer never be 100% efficient.
Force is defined as
Change in momentum b)rate of change of momentum
c)The quantity that opposes inertia d)The quantity that keeps the velocity constant
Answer:
c) the quantity that opposes inertia
Please help me plzzzzz
Answer:
what
Explanation:
Explain the meaning of the name "black hole". This should be 2-3 sentences. Hint- relate this to density and how it effects things. *
A decomposition ________ occurs when a substance is broken down into two or more simpler substances in a chemical reaction.
(APEX)
need the answer as fast as possible
Answer:
Element is the answer ok