Answer:
The answer is 222.4 mExplanation:
The distance covered by an object given it's velocity and time taken can be found by using the formula
distance = velocity × timeFrom the question
velocity = 27.8 m/s
time = 8 s
We have
distance = 27.8 × 8
We have the final answer as
222.4 mHope this helps you
A student is planning to make changes to a circuit. Which change will
increase the voltage?
A. Add another switch between the lightbulb and the battery.
B. Replace the existing battery with a larger battery.
c. Add another lightbulb between the battery and the switch.
D. Remove the existing lightbulb from the circuit.
Answer: B replace the battery with a larger one
Explanation: B
Answer:
Replace the wire with one that is thicker.
Explanation:
Please help me fast
A house uses eight 60 W lamps for lighting. On an average, each lamp is switched on for 6 hours each day. If the electricity tariff is Rs. 15 per unit, find the cost of electricity
a) for one day
b) for the month of January
(a) The cost of electricity for one day is Rs. 42 .
(b) The cost of electricity for the month of January is Rs. 1,302.
Average energy usedThe electric energy consumed in each is calculated as follows;
E = Pt
E = 60 x 6 = 360 Wh
E(total) = 8 x 360 Wh = 2880 Wh
The cost of Electricity is in kWh
2880 Wh = 2.8 kWh
Cost of electricicty for one dayC = 2.8 kWh x (Rs. 15)/kWh
C = Rs. 42
Cost of electricity for the month of January (31 days)C = Rs.42 x 31
C = Rs. 1,302
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A water-skier with weight Fg = mg moves to the right with acceleration a. A horizontal tension force T is exerted on the skier by the rope, and a horizontal drag forcc Fa is cxertcd by thc watcr on the ski. The water also exerts a vertical lift force L on the skier. Which of the following are correct relationships between the forces exerted on the skier-ski system? Select two answers. (A) T-Fd = ma (B) L-Fg=ma (C) L- =0 (D) T- Fd 0
Answer:
The correct relationships are T-fg=ma and L-fg=0.
(A) and (C) is correct option.
Explanation:
Given that,
Weight Fg = mg
Acceleration = a
Tension = T
Drag force = Fa
Vertical force = L
We need to find the correct relationships
Using balance equation
In horizontally,
The acceleration is a
[tex]T-Fd=ma[/tex]...(I)
In vertically,
No acceleration
[tex]w=L[/tex]
[tex]mg-L=0[/tex]
Put the value of mg
[tex]L-fg=0[/tex]....(II)
Hence, The correct relationships are T-fg=ma and L-fg=0.
(A) and (C) is correct option.
In the attached picture we can see the original question.
A water-skier with weight Fg = mg moves to the right with acceleration a. A horizontal tension force T is exerted on the skier by the rope, and a horizontal drag force Fd is exerted by the water on the ski. The water also exerts a vertical lift force L on the skier. The correct relationships are:
(A) [tex]T - F_d = ma[/tex]
(C) [tex]L - F_g = 0[/tex]
A water skier is moving to the right with acceleration a. If we analyze the forces in the horizontal direction, we can identify the tensión force (T), in the direction of the movement and the drag force (Fd), opposing to the movement. According to Newton's second law of motion, the resultant of these forces is equal to the product of the mass of the water skier and its acceleration.
[tex]T - F_d = ma[/tex]
In the vertical direction, we have the weight of the water skier (Fg) and the lift force (L) exerted on the skier by the water. The resultant of these 2 forces is zero, since there is no acceleration in the vertical direction.
[tex]L - F_g = 0[/tex]
A water-skier with weight Fg = mg moves to the right with acceleration a. A horizontal tension force T is exerted on the skier by the rope, and a horizontal drag force Fd is exerted by the water on the ski. The water also exerts a vertical lift force L on the skier. The correct relationships are:
(A) [tex]T - F_d = ma[/tex]
(C) [tex]L - F_g = 0[/tex]
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PLEASE HELP I NEED THIS FAST
Describe how electric potential energy, kinetic energy, and work change when two charges of opposite sign are placed near each other.
Answer:
If the charges have the same sign, so that qsqt>0, then the potential energy decreases as the charges separate; if the charges have opposite sign, the potential energy increases from negative infinity.
Explanation:
I hope this answered your question!
what is capacity and capacitor
Answer:
Explanation:
Capacity: the max amount that something can contain.
"the capacity of the freezer is 1.1 cubic feet"
capacitor: device for storing electrical energy, includes two conductor that are close to one another and insulated from each other. A simple example is a parallel-plate capacitor.
Source: Britannica.com
Answer:
capacitythe maximum amount that something can containcapacitora device used to store an electric charge, consisting of one or more pairs of conductors separated by an insulatorExplanation:
hope it helpslearn with brainlyA 100V battery is connected to two oppositely charged plates that are 10cm apart. i. What is the magnitude of the electric field? ii. Calculate the Electric Force exerted on a +200 C point charge. iii. What is the electric potential energy of the charge when it's 8cm and 2cm from the negatively charged plate? iv. How much work was required to move the charge from 8cm to 2cm? v. If the 10gram point charge was at rest at point A, what is the final speed at point B?
Answer:
1.) 1000 N/c
2.) 200000 N
3.) 60v
4.) 120000J
5.) 4899 m/s
Explanation:
Given that a 100V battery is connected to two oppositely charged plates that are 10cm apart.
1.) The magnitude of electric field strength is the ratio of potential difference per distance between the plates. That is,
Electric field = V/d
Electric field = 100/0.1
Electric field = 1000 wb
2.) Electric field strength is also the ratio of force per unit ccharge. That is,
Electric field = F / q
1000 = F / 200
Cross multiply
F = 1000 × 200
F = 200000 N
3.) What is the electric potential energy of the charge when it's 8cm and 2cm from the negatively charged plate?
The distance = 8cm - 2cm = 6cm
Electric field = V / d
Substitute the electric field and the distance into the formula
1000 = V / 0.06
Make V the subject of formula
V = 1000 × 0.06
V = 60 V
4.) How much work was required to move the charge from 8cm to 2cm?
Work done = VQ
Since V = 60v
Then,
Work done = 60 × 200
Work done = 120000 J
5.) If the 10 gram point charge was at rest at point A, what is the final speed at point B?
Work done = 1/2mv^2
120000 = 1/2 × 0.01 × v^2
V^2 = 120000/ 0.005
V^2 = 24000000
V = 4899 m/s
The magnitude of electric field strength has been 1000 wb.
The electric force (F) applied by 200 C charge has been 2000,000 N.
The values for electric potential energy has been 60 V.
The work done in moving the charge across the plate has been 12 kJ.
The speed of charge at point B has been 48.98 m/s.
The magnitude of electric field strength has been defined as the force per unit charge.
The expression for magnitude of electric field strength (E) has been:[tex]E=\dfrac{V}{d}[/tex]
Where, the voltage of battery, [tex]V=100\;\rm V[/tex]
The distance between plates, [tex]d=10\;\rm cm\;;0.1\;m[/tex]
Substituting the values for magnitude of electric field strength (E):
[tex]E=\dfrac{100}{0.1} \\E=1000\;\rm wb[/tex]
The magnitude of electric field strength has been 1000 wb.
The expression of electric force (F) applied by the battery has been given as:[tex]F=E\;\times\;q[/tex]
Where, the magnitude of electric field strength, [tex]E=1000\;\rm wb[/tex]
The charge for the force has been, [tex]q=200\;\rm C[/tex]
Substituting the values for electric force (F):
[tex]F=1000\;\times\;200\\F=200000\;\rm N[/tex]
The electric force (F) applied by 200 C charge has been 2000,000 N.
The electric potential energy (E) for charge has been given as:[tex]E=\dfrac{V}{d}[/tex]
The magnitude of electric field strength, [tex]E=1000\;\rm wb[/tex]
The distance between plates, [tex]d=8\rm \;cm-6\;cm\\d=2\;cm\;;0.02\;m[/tex]
Substituting the values for electric potential energy, (V):
[tex]1000=\dfrac{V}{0.0.06} \\V=1000\;\times\;0.06\\V=60\;\rm V[/tex]
The values for electric potential energy has been 60 V.
The work done (W) to move a charge has been given by:[tex]W=Vq[/tex]
Where, the electric potential energy of the battery has been, [tex]V=60\;\rm V[/tex]
The charge for the force has been, [tex]q=200\;\rm C[/tex]
Substituting the values for work done, (W):
[tex]W=60\;\times\;200\\W=12,000\;\text J\\W=12\;\rm kJ[/tex]
The work done in moving the charge across the plate has been 12 kJ.
The speed (v) of 10 g charge has been given as:[tex]W=\dfrac{1}{2}mv^2\\\\v=\sqrt{\dfrac{2W}{m} }[/tex]
Where, the work done on unit charge, [tex]W=12,000\;\rm J[/tex]
The mass of the charge, [tex]m=10\;g[/tex]
Substituting the values for calculating the speed of charge, (v):
[tex]v=\sqrt{\dfrac{2\;\times\;12,000}{10} } \\v=\sqrt{24,000}\\v=48.98\;\rm m/s[/tex]
The speed of charge at point B has been 48.98 m/s.
For more information about electric field, refer to the link:
https://brainly.com/question/12757739
An advertisement for a new car states that its top speed is 180 km/h. If it could
travel at this speed for 3h, how far would it go?
4
Answer:
Distance = speed×time = 180×3 = 540 Km
Help me please........
Answer:
He must be riding on a horse named Saturday.
Explanation:
He rode Saturday on Friday, stayed in the town for 3 days and left on his horse, named Saturday.
I've heard this many times.
he left his house on a Thursday got their on a Friday and left on Saturday Explanation:
this is the best i can do
A 120 watt bulb is a connected to a 48v line what is the current the flows in the bulb
[tex]\\ \sf\Rrightarrow P=VI[/tex]
[tex]\\ \sf\Rrightarrow 120=48I[/tex]
[tex]\\ \sf\Rrightarrow I=120/48[/tex]
[tex]\\ \sf\Rrightarrow I=2.5A[/tex]
what is the difference between positive and negative work? (no links)
Answer:
Positive work is said to be done when the force acting on a body produces a displacement in the direction of the force. Negative work is said to be done when the force acting on a body produces a displacement opposite to the direction of the force
Explanation:
When the displacement of the body the in the direction of the force then the work done is positive. For example :- a man pushing a car in a straight path.
When the displacement is in a direction opposite to the direction of the force then the work done is said to be negative. For example :- work done by the friction.
An 800 kg car exerts 4000N of applied force on a level road while
being opposed by 700 N of friction. Determine the acceleration of the car.
Answer:
a = 4.125 [m/s^2]
Explanation:
In order to calculate the value of acceleration, we must use Newton's second law, which tells us that the sum of forces must be equal to the product of mass by acceleration.
ΣF = m*a
where:
ΣF = sum of forces [N]
m = mass [kg]
a = acceleration [m/s^2]
Performing a summation of forces on the x-axis, we have:
4000 - 700 = m*a
4000 - 700 = 800*a
a = 4.125 [m/s^2]
How do the atomic numbers of different isotopes of an element compare?
Answer:
Different isotopes of an element have the same number of protons in the nucleus, giving them the same atomic number, but a different number of neutrons giving each elemental isotope a different atomic weight.
Explanation:
Answer:
Different isotopes of an element have the same number of protons in the nucleus, giving them the same atomic number, but each element isotope has a different atomic weight due to the different number of neutrons.
Explanation:
I hope my answer helps u :)
Idris has a mass of 65 kg. He is standing on the second floor of his apartment building, 5 meters above the ground. What is his gravitational potential energy (GPE)? O A. 325J O B. 31,213 J O C. 3,185 J O D. 79.8J
Answer:A.325J
brainliest would be apreciated!
hope I helped!
Using the diagram, what season is it in the northern hemisphere?
OWinter
OSummer
OAutumn (fall)
O Spring
As light from a star spreads out and weakens, do gaps form between the photons?
Answer:
ggggggfjhfbgehfe no idk yes maybe
Explanation:
Which of these words describes a chemical property of gold?
A. Shiny
B. Insoluble
C. Inert
D. Malleable
Answer:
D. Malleable
Explanation:
Gold is metallic, with a yellow colour when in a mass, but when finely divided it may be black, ruby, or purple. It is the most malleable and ductile metal; 1 ounce (28 g) of gold can be beaten out to 300 square feet. It is a soft metal and is usually alloyed to give it more strength.
A car is moving at 18km/hr when it accelerates at 4m/² for 2 seconds. What is the car's new velocity?
Answer:
44
Explanation:
v=u+a(t)
v=18+4(2)
v=22(2)
v=44 (where v=final velocity,u=initial velocity,a=acceleration,and t=time)
ii. Describe how thermal pollution from power plant discharge would affect the frequency of dead zones.
Answer:
Warmer water cannot hold as much dissolved oxygen as cold water can hold, which would increase the number of hypoxic zones/dead zones.
Which of these is most directly related to the mass of an object? A. inertia B. acceleration C. velocity D. volume
Answer:
A. Inertia
Explanation:
Answer:
A inertia is directly related to mass
Explanation:
inertia
How much to spend on groceries per month for 1 person.
USDA Food Plan Spending for a Single Person
Low-cost: $222.60. Moderate-cost: $272.20.
can someone right me a flooding psa ?
Answer:
Here is what I thought of: Below;
Explanation:
Floods, big or small, can have devastating effects on your home and your family. You can take steps to reduce the harm caused by flooding. Learn how to prepare for a flood, stay safe during a flood, and protect your health when you return home after a flood.
Preparing for a Flood
Learn how to prepare for a flood, including how to create a plan, supplies you’ll need, and getting your home ready.
Floodwater Safety
Floodwater and standing water can be dangerous. Protect yourself and your loved ones from risks brought on by floods.
Returning Home
Returning home after a flood? Be aware that your home may be contaminated with mold or sewage. Take steps to keep yourself and your loved ones safe.
Hope this helps you. :)
1. What is the weight (force due to gravity) of an object that has a mass of 15 kg?
Answer: 1470 N
Explanation: mass = 15
weight is the product of mass and force due to gravity
AS WE KNOW THAT
W = mG
W = 15 X 9.8
W = 1470 N
3. Similar cells work together in a_
which is part of an_
which is part_
Billiard balls moving across a pool table is an example of _____ friction.
Rahul kept two plane mirrors at a certain angle in front of a burning candle. He could see 5 images of the candle in the mirrors. What might be the angle between the mirrors? PLEASE NOW I WILL MARK AS BRAINLIEST
Answer:
The angle between the mirrors is 90°.
Explanation:
Given that,
Number of image = 5
Rahul kept two plane mirrors at a certain angle in front of a burning candle.
We need to find the angle between the mirrors
Using given data
When Rahul kept two plane mirrors at a certain angle in front of a burning candle then see the 5 image of candle in the mirrors.
If rahul kept two plane mirrors at a 90° then we get the 5 image of candle.
Firstly we see the two images in both mirror and now first image of first mirror is see in second mirror and second image of second mirror is see in first mirror.
So, we can say that we see the 5 image of candle in the mirrors.
Hence, The angle between the mirrors is 90°.
Betty drew the life cycle of a butterfly for a science exhibition. The life cycle showed the various stages of growth before the egg turns into a butterfly. What type of model did Betty use?
A. hypothetical
B. conceptual
C. mathematical
D. physical
Answer:
D.physical model
Explanation:
it is the evolution of butterfly
The kinetic energy of a moving car is less than the amount of chemical potential energy that is released when fuel is burned in the engine. Which statement best explains why this is so? A. Some chemical energy is transformed into potential energy as the particles in the fuel are rearranged. B. The force of gravity transforms some kinetic energy into gravitational potential energy. c. More of the car's energy is transformed into potential energy the faster it goes D. Friction causes some of the energy released by the fuel to be transformed into thermal energy.
Answer:
A moving car possesses mechanical energy due to its motion (kinetic energy). A moving baseball possesses mechanical energy due to both its high speed (kinetic energy) and its vertical position above the ground (gravitational potential energy).
Explanation:
A bar magnet is falling toward the center of a loop of wire, with the north pole oriented downwards. Viewed from the same side of the loop as the magnet, as the north pole approaches the loop, what is the direction of the induced current?.
The direction of the induced current is counterclockwise.
What is Lenz law?This states that induced electric current flows in a direction such that the current opposes the change that induced it.
The direction of the induced current is counterclockwise as a result of the north pole being oriented downwards which is the opposite direction of the hands of a clock movement.
Read more about Lenz law here https://brainly.com/question/13744192
The resulting net force of an object is represented below. →10 N Which most likely represent the forces acting on the object? ↑ 63 N and ↓ 73 N ↑ 97 N and ↓ 87 N ← 63 N and → 73 N ← 97 N and → 87 N.
Resulting force is the vector sum of all the forces acting on an object. The resulting net force of →10 N can be represented by ← 63 N and → 73 N
Net force on an objectThe net force on an object is the sum of all the forces acting on an object. Resolving the forces in vertical direction and horizontal direction separately gives the net force on the object.
∑Fx = ma
∑Fy = ma
The net force is pointing towards the right and the correct option must contain two horizontal forces whose resultant is towards the right.
Considering following horizontal forces,
← 63 N and → 73 N, the net force = - 63 N + 73 N = 10 N (→ 10 N)← 97 N and → 87 N, the net force = -97 N + 87 N = -10 N (← 10 N)Thus, the resulting net force of →10 N can be represented by ← 63 N and → 73 N
Learn more about net force here: https://brainly.com/question/14361879
Answer: C, 63N and 73 N
Explanation:
if a tennis ball of 50g mass is thrown at 20m/s velocity and it hits a wall and bounces back, what will be the change of momentum?
Answer:
Gold is a relatively dense metal because its atoms have more protons then atoms of many other metals
Explanation: