Answer:
PE = mgh
Explanation:
m is mass, g is gravitational constant (9.81) and h is height
While working out a man preformed 200 J of work in 3 seconds. What was his power?
A. 600 W
B. 33.3 W
C. 66.7 W
D. 112.3 W
Answer:
C
Explanation:
A watt is a joule per second. Since he is working over 3 seconds you have to divide his work over three seconds which is 200/3. This gets you 66.7 watts.
How should the student change the circuit to give negative values for current and
potential difference?
Answer:
changing the polarity or direction of the battery changes the sign of the voltage and the current
Explanation:
The sign of current and voltage are due to established conventions.
The way that a DC circuit with negative current values is by changing the polarity of the power source or by inverting the battery, this creates that the electrons move in the opposite direction
Changing the battery also changes the direction of the power difference, since the potential from positive to negative, in most cases negative is assigned a potential of zero volts
In summary, changing the polarity or direction of the battery changes the sign of the voltage and the current
W&P3)A janitor pushes a mop with a force of 52 N. If the mop handle is at an angle of 52 degrees above the horizontal, how much work is required to push the mop 4.6m?
Answer:
[tex]the \: required \: work is \to \\ \boxed{w = 147.3 \: J}[/tex]
Explanation:
[tex]the \: required \: force \: is \: the \: horizonal \: component \: of \: \\ the \: force \: f_{x} = 52 \cos(52) = \boxed{32.014396716 \: N} \\ the \: work \: to \: be \: done \: is \to \\ w = f \times s = 32.014396716 \times 4.6 \\ \boxed{w = 147.26622489 \: J}[/tex]
gasoline burning in a car engine
Is what type of energy?
Answer:
convection
Explanation:
A machine has mechanical advantage 2,what does it mean?
Answer:
The mechanical advantage of a machine is 2. Mechanical advantage MA is the ratio of output (generated by the machine) force to input (applied to the machine) force. So MA = 2 means that for example if you apply 100 N then your machine will multiply that force and generate 200 N .
An object with an initial speed of 4.0 m/s accelerates uniformly at 2.0 m/s^2
in the direction of its motion for a distance of 5.0 meters. What is the final
speed of the object?
Beer producers and bread bakers depend on types of yeast to respirate anaerobically to make their products.
True
False
Answer:
True
Explanation:
Identifying Characteristics Common to All Protists Use the drop-down menus to complete the statements. All protists live in environments that are . All protists must . All protists have . All protists make or consume .
Answer:
Use the drop-down menus to complete the statements.
All protists live in environments that are
✔ wet
.
All protists must
✔ reproduce
.
All protists have
✔ a nucleus
.
All protists make or consume
✔ food
Explanation:
I got it right hope its the right one
Answer:
Use the drop-down menus to complete the statements.
All protists live in environments that are
✔ wet
.
All protists must
✔ reproduce
.
All protists have
✔ a nucleus
.
All protists make or consume
✔ food
.
Explanation:
А
train moves with
uniform velocity of 36km/h
for 1os, calculate
total distance travelled
travelled
Explanation:
Distance is the product of speed and time:
Distance is the product of speed and time:[math]36 \frac{km}{h[/math]} ×5seconds
Distance is the product of speed and time:[math]36 \frac{km}{h[/math]} ×5seconds = 180km3600seconds×seconds = 1803600 km
Distance is the product of speed and time:[math]36 \frac{km}{h[/math]} ×5seconds = 180km3600seconds×seconds = 1803600 km= 0.05 km
Distance is the product of speed and time:[math]36 \frac{km}{h[/math]} ×5seconds = 180km3600seconds×seconds = 1803600 km= 0.05 km= 20 m
Hope u this answer cleared ur doubt
Approximately what percentage of the almost 1,500
highway deaths in Pennsylvania each year are
attributed to aggressive driving?
A. 50%
B. 60%
C.70%
D.80%
Answer:
50% are attributed to aggressive driving
The percentage of the almost 1,500 highway deaths in Pennsylvania each year attributed to aggressive driving will be 50%.
What is aggressive driving?Aggressive driving is defined as any behind-the-wheel activity that, without regard for safety, puts another person (or people) and/or property in danger.
Aggressive driving can vary from potentially dangerous conduct to serious assault.
From the data obtained the percentage of the almost 1,500 highway deaths in Pennsylvania each year attributed to aggressive driving will be 50%.
Hence option A is correct.
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Which state(s) of matter can be compressed?
Which statement describes the path of electrons from a battery to a circuit?
O A. Electrons move away from the positive end of a battery and then
through the circuit toward the negative end of the battery.
B. Electrons move through the battery from the negative terminal to
the positive terminal and then into the circuit.
C. Electrons move through the battery from the positive terminal to
the negative terminal and then into the circuit.
D. Electrons move away from the negative end of a battery and then
through the circuit toward the positive end of the battery.
Answer:D
Explanation:
C is wrong
Electrons move away from the negative end of a battery and then through the circuit toward the positive end of the battery. So, the correct option is (D).
What is Circuit?An electronic circuit is made up of individual electronic components, such as resistors, transistors, capacitors, inductors and diodes, connected by conductive wires or traces through which electric current can flow.
A circuit is a complete circular path through which electricity flows where the circuit consists of a current source, a conductor, and a load. The term circuit can be used in a general sense to refer to a fixed path that electricity, data, or signals can travel.
In the electric circuit, electrons move away from the negative end of a battery and then through the circuit toward the positive end of the battery.
Thus, electrons move away from the negative end of a battery and then through the circuit toward the positive end of the battery. So, the correct option is (D).
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A 1000-kg car traveling with a speed of 35 m/s skids to a stop in 25m. Determine the average force applied to the breaks. If it took 3.2s to stop, who much power was generated by the breaks?
Answer:
1. 24500 N.
2. 191406.25 watt
Explanation:
From the question given above, the following data were obtained:
Mass (m) of car = 1000 Kg
Initial velocity (u) = 35 m/s
Distance (s) = 25 m
Final velocity (v) = 0 m/s
Time (t) = 3.2 s
Force (F) =?
Power (P) =?
Next, we shall determine the acceleration of the car. This can be obtained as follow:
Initial velocity (u) = 35 m/s
Distance (s) = 25 m
Final velocity (v) = 0 m/s
Acceleration (a) =?
v² = u² + 2as
0 = 35² + (2 × a × 25)
0 = 1225 + 50a
Collect like terms
0 – 1225 = 50a
– 1225 = 50a
Divide both side by 50
a = – 1225 / 50
a = –24.5 m/s²
1. Determination of the force.
Mass (m) of car = 1000 Kg
Acceleration (a) = –24.5 m/s²
Force (F) =?
F = m × a
F = 1000 × –24.5
F = –24500 N
The negative sign indicate that the force is in opposite direction to the motion of the car.
2. Determination of the power
Force (F) = 24500 N
Distance (s) = 25 m
Time (t) = 3.2 s
Power (P) =?
Next, we shall determine the energy.
Energy = force × distance
Energy = 24500 × 25
Energy = 612500 J
Finally, we shall determine the power. This is illustrated below:
Power = Energy /time
Power = 612500 /3.2
Power = 191406.25 watt
What is the kinetic energy of a 620.0 kg roller coaster moving with a velocity of 9.00 m/s? Round to 3 significant
figures
0 2.790 J
5,580 J
025,100 J
050,200 J
Answer:
I think C
Explanation:
kinetic energy formula: 1/2mv^2
1/2(620kg)(9m/s)^2
1/2(620kg)(81m/s)
1/2(50220)
KE = 25110 J
How is energy sent from Earth to space?
conduction and convection
radiation and conduction
reflection and conduction
radiation and reflection
Answer:
radiation and reflection
hope helps you
have a nice day
For each of the variables, make a hypothesis.
1. Egg Size: As I break. the size of the egg, it will be likely to the drop height, the egg will be
2. Drop height: As I likely to break. 3. Landing Surface: (write your own statement here, think about the surface and what might be important about it that would increase or decrease the likelihood that the egg will break)
There is a data table on the next page. Be sure to conduct your trials in an organized manner to allow for the data table to be of maximum use to you in answering the questions.
Answer:
Hope this helps :)
Explanation:
Let's start b writing down coordinates of all points:
A(0,0,0)
B(0,5,0)
C(3,5,0)
D(3,0,0)
E(3,0,4)
F(0,0,4)
G(0,5,4)
H(3,5,4)
a.) When we reflect over xz plane x and z coordinates stay same, y coordinate changes to same numerical value but opposite sign. Moving front-back is moving over x-axis, moving left-right is moving over y-axis, moving up-down is moving over z-axis.
A(0,0,0)
Reflecting
A(0,0,0)
B(0,5,0)
Reflecting
B(0,-5,0)
C(3,5,0)
Reflecting
C(3,-5,0)
D(3,0,0)
Reflecting
D(3,0,0)
b.)
A(0,0,0)
Moving
A(-2,-3,1)
B(0,-5,0)
Moving
B(-2,-8,1)
C(3,-5,0)
Moving
C(1,-8,1)
D(3,0,0)
Moving
D(1,-3,1)
If the strength of the magnetic field at B is 6 units, the strength of the magnetic field at A is _____.
A. 1.5 units
B. 0.75 units
C. 24 units
D. 10.6 units
Answer:
I think its c but am not quite sure
Explanation:
pls mark me as brainlist
Answer:
24 units
Explanation:
hope this helps :)
Emotional Intelligence includes:
• sensitivity to others
•recognition that people's reactions may be hiding what they are truly feeling .
•always being kind to everyone in all situations
• d a and b .
• all of the above
The next question
Emotions that seem to happen to you are actually made by you
True or false
what was the main advantage of a dial phone over an operator-controlled switchboard
20 POINTS.
URGENT HELP AND PLEASE EXPLAIN.
Student A states that when she sits down on a chair, she is exerting a force on the chair and that is all that happens. Student B states that when she sits on a chair, the chair is actually exerting a force back on her in reaction to her force exerted upon the chair Which student is correct and why?
Answer:
i think its student b (d)
Explanation:
it might be student b cuz every action creates an equal and opposite reaction
Student B states that when she sits on the chair, the chair is actually exerting a force back on her in reaction to her force exerted upon the chair because of newton's third law. Hence, option D is correct.
What is newton's third law?The third law of Newton asserts that when bodies interact, they exert forces that are equal in size and directed in the opposite direction. Another name for the third law is the law of reaction and action. This law is crucial for understanding issues with static balance, where all pressures are in balance, but it also remains true for bodies moving at a constant or accelerated speed.
It doesn't only use bookkeeping methods; the forces it represents are actual forces. For illustration, a book laying on a table exerts downward pressure equal to the weight of the book on the table. The table produces an equal and opposite force on the book in agreement with the third law.
Therefore, student B is correct that because of Newton's third law there is an equal and opposite action and counteracts the student's so that neither move.
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a five sentence summary about compounds
please it is do In 5min HELP ME PLZZZZ
Explanation:
Compounds are substances composed of two or more kind of atoms or elements joined together in a definite grouping. The properties of compounds are distinct from those of the individual elements that are combined in its make up.
There are several millions of compounds that are known. Compounds are derived from elements. They are usually represented by chemical formulae.
If it takes the watermelon 1 second to reach the ground when it is thrown downward at 10 m/s, how tall are the stands?
what is the density to the object g/cm3
relationship between voltage, resistance and current in a circuit
Answer:
V = I×R
where -
V = potential difference across
I = current flowing in the circuit
R = Equivalent Resistance in the circuit
Answer:
Answer:
V = I×R
where -
V = potential difference across
I = current flowing in the circuit
R = Equivalent Resistance in the circuit
Explanation:
A sound wave generated by a musical note has the characteristics presented
in the table. What is the missing value?
Answer:
The answer is A. 6.3
Explanation:
I took AP EX quiz.
The missing value of the wavelength of air for the given values of wave speed and the frequency is 6.3.
What is wavelength?The wavelength is the distance between the adjacent crest or trough of the sinusoidal wave. The wavelength is the reciprocal of the frequency of the wave.
Wavelength λ = v/f
where v is the speed of wave = 346 m/s
Cordless phones use a frequency of 55Hz , then the wavelength will be
λ = v/f
λ = 346 m/s / 55 Hz
λ = 6.3 m
Thus, the missing value of wavelengths of the air is 6.3.
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the glass cover not the bulb of thermometer is very thin? give reason
Answer:
Its made of glass with very thin walls to allow the heat from sample being measured to reach the liquid quickly for fast response and quick reading (improves the quickness of response by the thermometer).it has a vacuum above the liquid column so there is no resistance to the expanding liquid.
Explanation:
Hope you have a great day ;-)
Materials that resist the charges flowing through
are
Only visibly rough surfaces have friction between them
if a net horizontal force of 175 N is applied to a bike whos mass is 43 kg what acceleration is produced
Explanation:
f=175N
m=43kg
a=?
know
f=ma
a=f/m
a=175/43
a=4.06m/s
If a net horizontal force of 175 N is applied to a bike whose mass is 43 kg, acceleration is produced 4.06 m/s².
What is force?A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.
Given in the question,
f = 175 N
m = 43 kg
a =?
know
f = ma
a = f/m
a = 175/43
a = 4.06 m/s²
If a net horizontal force of 175 N is applied to a bike whose mass is 43 kg, acceleration is produced 4.06 m/s².
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What is Latin word for "little lumps?"
Answer:
tura paulo
Explanation:
sry if im wrong ;)
