a) An inflated balloon was pressed against a wall after it has been rubbed with a piece of synthetic cloth. It was found that the balloon sticks to the wall. This is because a positive and negative electric charge is produced, therefore the balloon sticks to the wall.
b) When an object is thrown up, it comes back to ground because of gravitational attraction force of earth.
c) Mountaineers suffer nose bleeding at higher altitudes because the oxygen level decreases with increase in altitude, which the body cannot adjust.
d) Foundations of high rise buildings are kept wide because more is the area of contact, less is the pressure efforts. So, foundations are wide so as to decrease the possibility of the building from falling down.
e) Deep sea divers or high altitude fliers wear special suits so as prevent their body from being crushed by the water pressure. Since water pressure is maximum at deep seas and oceans, therefore, more is the risk of being injured.
f) Walls of a dam are thickened near the base so that the dam can handle the kinetic energy pressure and prevent itself from breaking down, which if not, can lead to flooding.
HOPE IT HELPS...
difference between:
1.distance and displacement
2.centripetal froce and centrifugal force
3.speed and velocity
4.velocity and acceleration
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.Which type of bond and how many bonds would occur as carbon dioxide (CO2) is formed from carbon in Group IVA and oxygen in Group VIA?(1 point)
one covalent bond
two ionic bonds
three metallic bonds
four covalent bonds
Answer:four covalent bonds
Explanation:
It’s right
The number of flowers on different breeds of bushes in a greenhouse is recorded every week for two months.
Is there a equation or something so I can do the math of how many flowers there are at the end of the two monthsm
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!!
7. Graphs
8. Experiment
9. Problem
14. Observations
**The rest of the points are correct .^_^
I hope I helped you^_^
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?
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
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
Explanation:
Just adding up the horizontal and vertical components of both vectors separately.
What will happen to the gravitational force when the distance between the centre of the two bodies is halved?
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?
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
In AC Theory, we are going to add components that will cause use to rely on Trigonometry to evaluate different types of Electrical Power. What three units of power will we be measuring
Answer:

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Home / AC Circuits / Power in AC Circuits

Power in AC Circuits
Electrical power consumed by a resistance in an AC circuit is different to the power consumed by a reactance as reactances do not dissipate energy
  
In a DC circuit, the power consumed is simply the product of the DC voltage times the DC current, given in watts. However, for AC circuits with reactive components we have to calculate the consumed power differently.
Electrical power is the “rate” at which energy is being consumed in a circuit and as such all electrical and electronic components and devices have a limit to the amount of electrical power that they can safely handle. For example, a 1/4 watt resistor or a 20 watt amplifier.
Electrical power can be time-varying either as a DC quantity or as an AC quantity. The amount of power in a circuit at any instant of time is called the instantaneous power and is given by the well-known relationship of power equals volts times amps (P = V*I). So one watt (which is the rate of expending energy at one joule per second) will be equal to the volt-ampere product of one volt times one ampere.
Then the power absorbed or supplied by a circuit element is the product of the voltage, V across the element, and the current, I flowing through it. So if we had a DC circuit with a resistance of “R” ohms, the power dissipated by the resistor in watts is given by any of the following generalised formulas:
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
Answer:
C) presence of chloroplast
Explanation:
Animal cells have Chloroplast unlike plant cells.
PLEASE HELP ONLY 30 MINS
Answer:
your answer is 0 m/s because the object is in rest
diffrence between UFP&LFP
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.
what is simple machine
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.
Answer:
Diffraction and Wavelengyh
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.
My answer is in the picture
Swipe the pictures to see the others
A person walks 5,000 cm per day. How many km does that person walk in a year?
Answer:
18.25 km
Explanation:
Convert 5,000 cm to km: 5,000 cm / 10000 = 0.05 km
That person walks 0.05 km per day.
You will get the answer by multiply 365 days (a year): 0.05 km x 365 = 18.25 km
the particles in the nucleus that have a positive charge are the
Answer:Protons
Explanation:
There is a current of 0.24A in a lamp connected to a 240V supply. What is the input power to the lamp?
Answer:
Explanation:
Wattage = E * I
E = 240
I = 0.24
Wattage = 240 * 0.24
Wattage = 57.6
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!!!!!
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.
When is the pressure of the man on the ground more – lying position or standing
position? Explain.
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...
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.
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
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
Answer:
D is the answer
Explanation:
6.45×7.44= 47.98800
Which if we round of we get 48m
different between seed and grain
Answer:
Hope it helps u
Be happy
Stay healthy
a=(v – u)/t
i. V as subject
ii. U as subject
iii. T as subject
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^_^
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.
Force = Mass x Acceleration
i. Mass as subject.
ii. Acceleration as subject.
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!what is the density of a 75 g block of wood measuring 12 cm x 8cm x 9cm
Answer:
density is equal to mass divided by volume (m/v)
volume: 12×8×9=864cm³
75÷864=0.09
Answer: 0.09g/cm³
0.098x0.4x280................
Answer:
10.976hope that helps uh..☺
please mark this answer as brainlist
The larger the number of charges flowing through the wire, the larger is the ____________ flowing in the wire.
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
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?