YALLL I NEED HELP ASAP... THIS DUE AT 11:59 AND ITS 10.42 RIGHT NOW
What is mast often givena value of zero to describe an object's position on a straight line? Odisplacement Oreference point O distance Oending location Mak Save and Exit
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This element has four valance electrons and four energy levels.
The typical elemental semiconductors are silicon and germanium, each atom of which has four valence electrons.
When energy is transferred from one part of a system to another, some of the
energy is lost during the transfer and cannot be used as it was intended.
Which two sentences describe examples of this?
A. Friction between a car's tires and the road produce heat.
N
B. Sunlight strikes a solar panel, generating electricity.
I c. Stereo speakers emit sound when powered by electrical energy,
D. Wind moves a turbine, generating electricity.
I E. Power lines heat up as electricity flows through them.
When energy is transferred from one part of a system to another, some of the energy is lost during the transfer are:
A. Friction between a car's tires and the road produce heat.
E. Power lines heat up as electricity flows through them.
What is energy transfer?Energy cannot be created or destroyed, but it can be transferred and transformed. There are a number of different ways energy can be changed, such as when potential energy becomes kinetic energy or when one object moves another object
There are three types of thermal energy transfer: conduction, radiation, and convection. Convection is a cyclical process that only occurs in fluids. Water molecules at the bottom of a heated pot begin to move faster and then spread out. These excited molecules rise; the cooler, denser waterfalls. The process then repeats.
At the time of transformation, there is a loss of energy in the atmosphere the two examples are Friction between a car's tires and the road producing heat. and Power lines heat up as electricity flows through them.
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If the entire chart repersents 100 homes, how many households have a pet bird?
Answer:
10
Explanation:
10% of 100 total pets equals 10 :) hope this helps
whound bus is travelling at 60 miles per hour on rte 95 going south west (for example travelling
3) A Greyhound bus is travelling at 60,
from Boston to New York city)
a. what is its velocity component
bat is its velocity component along the south direction?(5 pts)
h what is its component of speed along the west directionale
of speed along the west direction? (5 pts)
Bus travelling south west
Answer:
The velocity component in south direction is 42.42 miles/hour and in west direction is 42.42 miles/hour.
Explanation:
Given that,
Speed = 60 miles/hour
Direction = south west
Let the south in y axis and west in x axis.
Angle between x and y will be θ.
The component of speed is [tex]V_{x}[/tex] of x axis and [tex]V_{y}[/tex] of y axis.
[tex]\vect{V}=\vec{V_{x}i}+\vec{V_{y}j}[/tex]
Where,
[tex]V_{x}=|\vec{V}|\cos\theta[/tex]...(I)
[tex]V_{y}=|\vec{V}|\sin\theta[/tex]....(II)
We know that,
The south west direction makes 45° with west direction in x axis.
(a). We need to calculate the velocity component in south direction
Using equation (I)
[tex]V_{x}=|\vec{V}|\cos\theta[/tex]
Put the value into the formula
[tex]V_{x}=60\times\cos45[/tex]
[tex]V_{x}=42.42\ miles/hour[/tex]
(b). We need to calculate the velocity component in west direction
Using equation (II)
[tex]V_{x}=|\vec{V}|\sin\theta[/tex]
Put the value into the formula
[tex]V_{x}=60\times\sin45[/tex]
[tex]V_{x}=42.42\ miles/hour[/tex]
Hence, The velocity component in south direction is 42.42 miles/hour and in west direction is 42.42 miles/hour.
how is sound wave produced?
Answer:
Sound is produced when an object vibrates, creating a pressure wave.
Explanation:
This pressure wave causes particles in the surrounding medium (air, water, or solid) to have vibrational motion. ... The human ear detects sound waves when vibrating air particles vibrate small parts within the ear.
Answer:
A sound wave is created by continuous vibration of an object. We hear sound when these waves created by vibrations reach our eardrum.
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A car accelerates uniformly from rest to a speed of 58.3 mi/h in 9.47 s. Find the constant acceleration of the car.
what has been happening to the cosmic microwave background radiation since the Big Bang?
Answer:
Explanation:
Cosmologists refer to a "surface of last scattering" when the CMB photons last hit matter; after that, the universe was too big. So when we map the CMB, we are looking back in time to 380,000 years after the Big Bang, just after the universe was opaque to radiation. But the CMB was first found by accident.
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a car travels 554 miles south in 10.4 hours . what is the velocity of the car ? show all steps
Answer:
The answer is 53.27 mi/hrExplanation:
To find the velocity covered by the car we use the formula
[tex]v = \frac{d}{t} \\ [/tex]
where
d is the distance
t is the time
From the question
d = 554 miles
t = 10.4 hrs
We have
[tex]d = \frac{554}{10.4} \\ = 53.2692307...[/tex]
We have the final answer as
53.27 mi/hrHope this helps you
When you put your hands on a cold object, like
a glass of ice water, your hands become____________
The glass of water______________becomes
___________if you leave your hands on it for a long time. If you
leave the glass of ice water out in the sun, the
ice will start to ____________________.
Answer:
cold, warm and melt
Explanation:
What is the voltage of a circuit with 15 amps (bedroom) of current and a bedroom light with 12 ohms of resistance?
[tex] \sf• \: There \: is\: a \: circuit \: with\: 15 \: amps. \: (bedroom) \: of \: current \: and \: a \: bedroom \: light \: with \: 12\: ohms\: of \: resistance.[/tex]
[tex] \\ [/tex]
[tex]\bf{ \underline{To \: Find :- }}[/tex][tex] \sf{• \: The \: Voltage\: of\: the\: circuit. }[/tex]
[tex] \\ [/tex]
[tex] \huge\bf{ \underline{ Solution:- }}[/tex]
[tex] \sf According \: to \: the \: question, [/tex]
[tex] \sf• \: Current \: (I) = 15 \: 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 =15 \times 12[/tex]
[tex] \rightarrow \sf V =180[/tex]
[tex] \\ [/tex]
[tex] \sf \purple{Therefore, \: the \: voltage \: of \: the \: circuit \: is \: 180 \: v \: .}[/tex]
Considering the Ohm's law, the voltage of a circuit with 15 amps (bedroom) of current and a bedroom light with 12 ohms of resistance is 180 volts.
Current is the physical quantity that expresses the amount of electricity that flows through a conductor in the unit of time and is measured in amperes
The voltage is the difference that exists between the electrical charge that leaves the source and with which it finally reaches the end of the circuit. It is expressed in volts.
Resistance is the difficulty that a circuit opposes to the passage of a current. They are measured in ohms.
Ohm's law establishes the relationship between current, voltage, and resistance in an electrical circuit. This law establishes that the current through a circuit is directly proportional to its voltage or voltage and inversely proportional to the resistance it presents.
Mathematically Ohm's law is expressed as:
[tex]I=\frac{V}{R}[/tex]
Where I is the intensity that is measured in amps (A), V the voltage that is measured in volts (V); and R is the resistance measured in ohms (Ω).
In this case, you know:
I= 15 ampsV=?R= 12 ohmsReplacing in Ohm's law:
[tex]15 amps=\frac{V}{12 ohms}[/tex]
Solving:
V= 15 amps× 12 ohms
V=180 volts
In summary, the voltage of a circuit with 15 amps (bedroom) of current and a bedroom light with 12 ohms of resistance is 180 volts.
Learn more about the Ohm's law:
https://brainly.com/question/25799337?referrer=searchResultshttps://brainly.com/question/3493479?referrer=searchResultshttps://brainly.com/question/9771342?referrer=searchResultshttps://brainly.com/question/11806215?referrer=searchResultsA dump truck is at rest on a section of road that is at an angle of 5.00° to the horizontal. The truck's mass is 15500 kg. What force must the brakes exert to keep the truck from rolling down the sloped road?
Answer:
F = 13252.46 [N]
Explanation:
To solve these types of problems we must make a free body diagram. Attached we cand find a diagram of this free body diagram with the forces acting on the truck, since the truck does not move it follows that it is in static equilibrium so the sum of the forces on the X and Y axes must be equal to zero.
In the free body diagram it is necessary to use a Force F, which prevents the truck from going downhill, the direction of this force must be opposite to the movement towards the downhill.
Thus performing a sum of forces on the X-axis equal to zero, we can find the Force F corresponding to the brakes of the truck.
6.1x10^-4 in expanded form
Answer:fghkigf
Explanation:gbjyfd
In a mixture the original substances change to form a new substance.
A. True
B. False
A car is parked on a cliff overlooking the sea. The cliff is inclined at an angle of 40.0 degrees below the horizontal. The
negligent driver leaves the car in neutral and it begins rolling from rest towards the cliff's edge with an acceleration 5.00
m/s/s. The car moves a linear distance of 70.0 to the edge of the cliff before plunging into the ocean below. The cliff is
50.0 m above the sea. Round everything to 3 significant digits! Use 9.80 for gravity. (hint - because the initial velocity is
down, this causes the cosine rule to flip. Use sin to find Vox. Use cosine to find Viy)
Fact: Parking a car on a cliff? That is unsafe and probably also illegal.
If a coconut drops from its tree and takes 3.34 seconds to hit the ground, calculate the velocity.
you have not given any information how could we answer this
A scooter traveling at 4 m/s rides 800 meters. For what duration of time has the scooter been traveling?
Answer:
The answer is 200 sExplanation:
To find the duration or time taken we use the formula
[tex]t = \frac{d}{v} \\ [/tex]
where
d is the distance
v is the velocity
From the question
d = 800 m
t = 4 m/s
We have
[tex]t = \frac{800}{4} \\ [/tex]
We have the final answer as
200 sHope this helps you
200secs
The equation is Distance ÷ speed = time so, 800m ÷ 4m/s = 200 secs.
A 400kg rock sits on top of a 250m cliff. During an earthquake, the rock falls from the cliff. What is the rock's PE when it is 50m from the ground? PE = mgh = Wh 9 = 9.8 m/s2
Answer:
Explanatioidk
n:
they say what goes up must come down does that mean that all of our intelligence will... is everybody in the future gonna be more and more dumb!
How might you estimate the minimum temperature?
a.
Find the temperature that lines exactly up with the two ends of the red line
c.
Use the number that lines up with the top part of the blue line on the left of the thermometer
b.
Use the number that lines up with the bottom part of the blue line on the left of the thermometer
d.
Find the midpoint of the redline
Answer:
d. find the midpoint of the redline
Which equation correctly relates mechanical energy, thermal energy and total of energy when there is friction present in the system?
The equation which correctly relates mechanical energy, thermal energy and total of energy when there is friction is E total = ME + E thermal.
What is Friction?This is the force which resists the relative motion of an object and it produces thermal energy.
This is why the appropriate equation is denoted as the sum of the mechanical energy and thermal(heat energy).
E total = Mechanical energy + E thermal.
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How can the motion of two objects be described relative to each other
Answer:
Explanation:
The force on an object causes an a object to move
You are walking in Paris alongside the Eiffel Tower and suddenly a croissant falls on your head and knocks you to the ground. If you neglect air resistance, calculate how many seconds the croissant dropped before it knocked you over if the velocity is 76.4 m/s.
Answer:
7,79 seconds
Explanation:
[tex]{\displaystyle {\overline {a}}={\frac {\Delta v}{t}}}[/tex]
You need to use the acceleration formula. A is acceliration, [tex]\displaystyle \Delta \mathbf {v}[/tex] is change in velocity and t is time.
You need to multiply the formula with t and divide by a and you get
a*t=[tex]\displaystyle \Delta \mathbf {v}[/tex]
t= [tex]\displaystyle \Delta \mathbf {v}[/tex]/a
after that you just need to insert the numbers
change in velocity is 76.4 minus 0.
acceliration is gravitational acceleration which is 9.81.
After that you get
t=76.4/9.81
t= 7,787971458 s
Answer:
seconds of freefall and calculate the velocity at impact in mi/hr. I VE = 10.78 m/s ... You are walking in Paris alongside the Eiffel Tower and suddenly a croissant smacks you on the head and knocks you to the ground. From your handy ... If you neglect air resistance, calculate how many seconds the croissant dropped before it.
Explanation:
A horizontal force of 400 N is exerted on a 2.0-kg ball as it rotates (at
arm's length) uniformly in a horizontal circle of radius 0.50 m Calculate
the speed of the ball ?
Answer:
the speed of the ball is 10 m/s
Explanation:
Given;
magnitude of exerted force, F = 400 N
mass of the ball, m = 2 kg
radius of the circle, r = 0.5
The speed of the ball is calculated by applying centripetal force formula;
[tex]F = \frac{mv^2}{r} \\\\v^2 = \frac{Fr}{m}\\\\v = \sqrt{\frac{Fr}{m}}\\\\ v = \sqrt{\frac{400*0.5}{2}}\\\\v = 10 \ m/s[/tex]
Therefore, the speed of the ball is 10 m/s
Answer:
The speed of the ball is 10 meters per second.
Explanation:
The fact that ball rotates uniformly means that speed of the ball is constant and resulting acceleration is centripetal, which means that external horizontal force exerted on the ball goes towards the center of rotation. We can estimate the speed of the ball by this equation of equilibrium:
[tex]\Sigma F_{r} = F = m\cdot \frac{v^{2}}{R}[/tex] (Eq. 1)
Where:
[tex]F[/tex] - External force exerted on the ball, measured in newtons.
[tex]m[/tex] - Mass of the ball, measured in kilograms.
[tex]v[/tex] - Linear rotation speed, measured in meters per second.
[tex]R[/tex] - Radius of rotation, measured in meters.
We clear the linear speed in (Eq. 1):
[tex]v^{2} = \frac{F\cdot R}{m}[/tex]
[tex]v = \sqrt{\frac{F\cdot R}{m} }[/tex]
If we know that [tex]F = 400\,N[/tex], [tex]m = 2\,kg[/tex] and [tex]R = 0.50\,m[/tex], the speed of the ball is:
[tex]v =\sqrt{\frac{(400\,N)\cdot (0.50\,m)}{2\,kg} }[/tex]
[tex]v = 10\,\frac{m}{s}[/tex]
The speed of the ball is 10 meters per second.
Calculate the mass (in g) of 0.8 cm³ of steel. The density of steel is 7.8 g/cm³. Give your answer to 2 decimal places.
mass= density times volume so 7.8 g/cm3 by0.8 cm3 answer is 6.24 g and it's already in two decimal places
Answer:
[tex]\boxed{6.24g}[/tex]
Explanation:
→ Utilise the density formula
Density = Mass ÷ Volume
→ Rearrange to make mass the subject
Mass = Density × Volume
→ Identify the density and volume values
Density = 7.8 and Volume = 0.8
→ Substitute the values into the density equation
Mass = 7.8 × 0.8 = 6.24 g
a macine that increases speed, a machine that changes the direction of force and a machine that increases force
What is the transfer of electricity in a motor?
Answer:
Electrical motor
Explanation:
Converts electrical energy to mechanical energy
PLEASE PLEASE HELP!!!!!!
The atomic mass is a measure of _____.
A. charge
B. protons plus neutrons
C. atomic energy
Answer:
the answer is B
Explanation:
The atomic mass of an atom is the sum of the protons plus neutrons it has.
Anyone knows this please help me
Answer:
True
Explanation:
