Which equation correctly relates mechanical energy, thermal energy, and total
energy when there is friction present in the system?
A. Ethermal
Ethermal
=
ME
B. Ethermal = Etotal - ME
C. Ethermal = ME - Etotal
D. Ethermal = Etotal + ME
Answers
Answer:
B
This is because frictional energy is similar to thermal energy in a system. Therefore the thermal energy produced is equal to
Related Questions
a=(v – u)/t
i. V as subject
ii. U as subject
iii. T as subject
Answers
Answer:
i.
[tex]a = \frac{(v - u)}{t} \\ v - u = at \\ v = at + u[/tex]
ii.
[tex]a = \frac{(v - u)}{t} \\ v - u = at \\ u = v - at[/tex]
iii.
[tex]a = \frac{(v - u)}{t} \\ ta = v - u \\ t = \frac{(v - u)}{a} [/tex]
I hope I helped you^_^
PLEASE HELP ONLY 30 MINS
Answers
Answer:
your answer is 0 m/s because the object is in rest
what is simple machine
Answers
the particles in the nucleus that have a positive charge are the
Answers
Answer:Protons
Explanation:
The apparent bending of a wave around the edge of an object is called _____. If a wave passes through a slit that has a width of the same order of magnitude as its _____, it will bend around both edges of the slit to give a semicircular wave.
Answers
Answer:
Diffraction and Wavelengyh
Which statement describes the distribution of charge in an atom?
O A neutral nucleus is surrounded by one or more negatively charged electrons.
O A positively charged nucleus is surrounded by one or more negatively charged electrons.
O A neutral nucleus is surrounded by one or more positively charged electrons.
O A positively charged nucleus is surrounded by one or more positively charged electrons.
Answers
Answer:
hope this helps
Explanation:
one in which a positively charged nucleus is surrounded by one or more negatively charged electrons.
A 10cm tall object is placed perpendicular to
the principal axis of a convex lens of focal length
30cm. The distance of the object from the line is
20cm.find the i)position ii)nature and iii) size of
the image formed.
Answers
My answer is in the picture
Swipe the pictures to see the others
PLZ HELP WILGIVE BRAINIEST!Read the false statement.
Each atom within a specific element has the same number of neutrons, which determines its atomic number.
Reword the statement so it is true.
Answers
Each atom within a specific element has the same number of protons, which determines its atomic number.
Protons determine an atoms atomic number
Ex:
Carbons atomic number: 6
Carbons number of protons: 6
Oxygens atomic number: 8
Oxygens number of protons: 8
Each atom within a specific element has the same number of protons, which determines its atomic number. The correct statement.
This is inaccurate because the atomic number of an element is determined by the number of protons in the nucleus of its atoms, not by the number of neutrons.
Each atom within a specific element has the same number of protons, which determines its atomic number. The atomic number of an element is a fundamental property that defines the element and its place on the periodic table.
The number of protons in the nucleus of an atom of that element. Neutrons, do affect the atom's mass and stability but do not determine their atomic number.
The correct statement is Each atom within a specific element has the same number of protons, which determines its atomic number.
To know more about neutron and proton:
https://brainly.com/question/29771588
#SPJ3
If the density of a liquid is 20gcm - 3 height is 4cm and gravitational field strength is 10 N kg, the pressure of the liquid is
Answers
Answer:
Pressure is 1.96 × 10^12 Pa
Explanation:
[tex]{ \bf{pressure = \frac{force}{area} }}[/tex]
height = 4 cm = 0.04 m
density = 20 g/cm³ = 20,000 kg/m³
But for force:
[tex]{ \sf{force = mass \times acceleration}} \\ { \sf{force = ( \frac{density}{volume} ) \times acceleration}} \\ \\ { \sf{force = ( \frac{20000 }{0.04 {}^{3} }) \times 10 }} \\ \\ { \sf{force = 3.13 \times {10}^{9} \: newtons}}[/tex]
For area:
[tex]{ \sf{area = 0.04 \times 0.04 = 0.0016 \: m {}^{2} }}[/tex]
[tex] { \tt{pressure = \frac{3.13 \times {10}^{9} }{0.0016} }} \\ \\ = { \tt{1.96 \times {10}^{12} \: pascals}}[/tex]
How far will a car move if it starts from rest, reaches a final speed of 40 m/s, and accelerated at 2 m/s/s?
Answers
Answer:
800 m
Explanation:
Acceleration (a) = Velocity (v) / Time(t)
a = (v-u) /t
where, v = final speed
u = initial speed
2m/s² = (40m/s - 0m/s)/t
that is, from rest is no speed.
2m/s² = (40m/s) /t
t = (40m/s)/2m/s²
t = 20 s
hence, the car has accelerated for 20 s.
From,
Velocity (v) = Displacement (d) /time(t)
displacement is the distance the car has travelled.
40m/s = d/20s
d = 40m/s × 20s
d = 800 m
A blue train of mass 50 kg moves at 4 m/s toward a green train of 30 kg initially at rest. The trains collide. After the collision the green train moves with a speed of 3 m/s. What is the final speed of the blue train?
Answers
Momentum = mass x speed
p = (30 kg) (3 m/s)
p = 90 kg m/s
0.098x0.4x280................
Answers
Answer:
10.976hope that helps uh..☺
please mark this answer as brainlist
different between seed and grain
Answers
Answer:
Hope it helps u
Be happy
Stay healthy
Use the list to answer the question.
potassium, Group 1
calcium, Group 2
iodine, Group 17
neon, Group 18
Which two elements in the list would bond together based on their ionic charges?(1 point)
potassium and neon
potassium and iodine
calcium and neon
calcium and potassium
Answers
Answer:
potassium and iodine
Explanation:
A stone is dropped from the top of the tower at height h. After 1 second another stone is dropped from balcony 20m below the top.Both reach ground at same time. What us the value of h.
Answers
There is a current of 0.24A in a lamp connected to a 240V supply. What is the input power to the lamp?
Answers
Answer:
Explanation:
Wattage = E * I
E = 240
I = 0.24
Wattage = 240 * 0.24
Wattage = 57.6
What will happen to the gravitational force when the distance between the centre of the two bodies is halved?
Answers
Heh I need some more help… imma just put all of them on one question… (•_•) It’s a crossword puzzle by the way!
7) Scientists use their data to make charts and (blank) to communicate the results of an experiment. [ 6 spaces ]
8) After the scientist makes a hypothesis, they perform an (blank) to collect data. [ 10 spaces ]
9) The first step of the scientific method is to define or identify the (blank). [ 7 spaces ]
14) Scientists make (blank) to help them make a hypothesis or collect data during an experiment. [ 12 spaces ]
Please help with the blanks, if you don’t know each answers don’t answer the question thats a waste if space!
ACTUALLY I’LL GIVE YOU A PICTURE AS WE! I hope it will help, so you can see what I am doing. ^v^
Thanks!!
Answers
7. Graphs
8. Experiment
9. Problem
14. Observations
**The rest of the points are correct .^_^
I hope I helped you^_^
MATHIMATICALY DETERMINE THE RESULTANT FORCE IF TWO FORCES A AND B ACT ON ANOBJECT
FORCE A IS 85N AND IS AT AN ANGLE OF 20 DEGREE TO HOIRZONTZL.FORCE B IS 125N AND IS AT AN ANGLE OF 60 DEGREE TO THE HOIRZONTAL
Answers
Explanation:
Just adding up the horizontal and vertical components of both vectors separately.
PLS, HELP WILL GIVE BRAINLIEST TO WHOEVER ANSWERS FIRST Think back to what you read about golf, volleyball, and tennis.
Which of these sports do you think you would be best able to play?
Why do you think so?
Which sport do you think you would have the toughest time playing?
Why do you think this is so?
Answers
golf, because I can aim at anything!
tennis because I'm not the best viewer. that is so fast and I won't be able to respond to the shot so fast
ina drew an animal cell in her science notebook. What’s wrong with the cell?
A.
absence of a cell wall
B.
absence of a nucleoid
C.
presence of chloroplast
D.
presence of a vacuole
Answers
Answer:
C) presence of chloroplast
Explanation:
Animal cells have Chloroplast unlike plant cells.
what is the density of a 75 g block of wood measuring 12 cm x 8cm x 9cm
Answers
Answer:
density is equal to mass divided by volume (m/v)
volume: 12×8×9=864cm³
75÷864=0.09
Answer: 0.09g/cm³
diffrence between UFP&LFP
Answers
Answer:
In the formula, 'X' is the temperature value to be converted, 'UFP' is the upper fixed point and 'LFP' is the lower fixed point of the temperature scale
Explanation:
LFP means Lower fixed point and UFP means Upper fixed point. Explanation: There are different scales with different lower fixed point and upper fixed point to measure temperature but the distance between these scales is same in any table or scale considered.
difference between:
1.distance and displacement
2.centripetal froce and centrifugal force
3.speed and velocity
4.velocity and acceleration
Answers
Explanation:
Distance is a scalar quantity that refers to "how much ground an object has covered" during its motion. Displacement is a vector quantity that refers to "how far out of place an object is"; it is the object's overall change in position.Centripetal force is the force REQUIRED for circular motion. Centrifugal force is the force that makes something flee from the center.Speed is the time rate at which an object is moving along a path, while velocity is the rate and direction of an object's movement.Velocity is the rate of change of displacement. Acceleration is the rate of change of velocity.
Force = Mass x Acceleration
i. Mass as subject.
ii. Acceleration as subject.
Answers
Answer:
1) mass = force / acceleration
2) acceleration = force / mass
Explanation:
Part 1)
Force = Mass x Acceleration
Divide both sides by acceleration
force / acceleration = mass
mass = force / acceleration
Part 2)
Divide both sides by mass
force / mass = acceleration
acceleration = force / mass
[tex]\rule[225]{225}{2}[/tex]
Hope this helped!
~AH1807Peace!When is the pressure of the man on the ground more – lying position or standing
position? Explain.
Answers
Hi,
The man on the ground in standing position has more pressure. This is because when he stands, only his legs are in contact with the ground. While lying, his body is more in contact with the ground, therefore, he exerts less pressure.
To the point, a man standing position on the ground had more pressure.
More is the area of contact, less is the pressure efforted.
Thank you...
Please answer these, I’m willing to give plenty of points.
Does a person with a family history of a breast cancer have a higher chance of developing breast cancer during her life?
IV:_________
DV:__________
Hypothesis:__________
Does grass grow faster under shade of a tree or in direct sunlight?
IV:_______
DV:_______
Hypothesis:_________
Observation: students do not eat very much of their food in the lunchroom.
Question: will students eat more food in lunch room if more fresh fruit and vegetables are used?
IV:_________
DV:__________
Hypothesis:_______
Observation: my dog won’t stop barking whenever someone rings the doorbell.
Question: will my dog bark less when the doorbell rings if he exercises for an hour everyday?
IV:_____
DV:_______
Hypothesis:________
Create your own question.
Observation:___________
Question:_____________
IV:________
DV:_________
Hypothesis:____________
Please send help before school starts!!!!!
Answers
Answer:
IV family history of breast cancer or not.
DV chance of developing breast cancer. Hypothesis Someone with a family history of breast cancer will have a higher chance of developing it.
IV: Where the grass is placed: tree shade or direct sunlight.
Dv:The grasses growth rate
Hypothesis: Grass will grow faster in direct sunlight as opposed to tree shade
IV: Fresh veggies and fruit or not
Dv: how much the students eat: will they eat more or less?
Hypothesis The students will eat more in the lunchroom when Fresh veggies and fruits are served.
IV: The dog exercise everyday for 1 hour or not.
DV: The dogs barking: less or more.
Hypothesis: The dog will bark less when someone rings the doorbell if he exercises for 1 hour every day.
Explanation:
Observation When I wish my face before bed, I get less breakouts in the morning.
Question Does nightly face washing prevent morning breakouts?
IV Washing face at night or not
Dv How much breakouts in the morning.
Hypothesis Washing your face nightly decreases the occurrence of morning breakouts.
what will happen to the gravitational force between two bodies if the distance between them is halved keeping their masses constant
help me
Answers
Answer:
if the distance between them is halved then gravitational force will be doubled....
A sprinter runs for 6.45 s at 7.44 m/s. How far does she get?
A. 0.867 m
B. 13.9 m
C. 1.15 m
D. 48.0 m
Answers
Answer:
D is the answer
Explanation:
6.45×7.44= 47.98800
Which if we round of we get 48m
The larger the number of charges flowing through the wire, the larger is the ____________ flowing in the wire.
Answers
Answer:
The larger the number of charges flowing through the wire,the larger is the current flowing in the wire.
Explanation:
if the wire is large then large amount of current flows through the circuit.but if the wire is small then a smaller amount of current will pass through.
I hope this helps