Explanation:
Taking g=10m/s²
P.E= mgh
490J= m×10×10.
490J=100m
m. = 490J/100
m. =4.9kg
As the cross-sectional area of a conductor increases, its resistance .
Answer:
Yess it’s resistance
Explanation:
Answer:
DECRAAAASESSSS
Explanation:
Two foam peanuts become equally charged as they fall out of a cardboard box. Each foam peanut carries a charge of 8 x 10^-4 C. If the peanuts are 0.05 m apart, what is the electric force between them? Assume that k = 9 x 10^9 Nm^2/C^2. Use Coulomb’s law equation: F = kq1q2/r^2.
A. 115,200 N
B. 2,304,000 N
C. 0.000000434 N
D. 0.0000086 N
Answer:
Answer labeled B : 2,304,000 N
Explanation:
Recall the formula for the electric force:
[tex]F_e=9\,\,10^9\, \, \frac{q_1*q_2}{d^2} \\F_e=9\,\,10^9\, \, \frac{8\,10^{-4}*8\,10^{-4}}{0.05^2} \\F_e=2,304,000\,\,N[/tex]
which agrees with answer B provided.
A 40-gram block of copper at 95*C is placed in 105 g of water at an unknown temperature. After equilibrium is reached, the final temperature of the water is 24*C. What was the initial temperature of the water?
The initial temperature of the water was approximately 81.67°C.
To solve this problem, we can apply the principle of energy conservation. The heat lost by the copper block is equal to the heat gained by the water.
The heat lost by the copper block can be calculated using the formula: Q1 = m1 * c1 * ΔT1,
where m1 is the mass of the copper block (40 g), c1 is the specific heat capacity of copper (0.39 J/g°C), and ΔT1 is the change in temperature (final temperature - initial temperature of the copper block).
The heat gained by the water can be calculated using the formula: Q2 = m2 * c2 * ΔT2, where m2 is the mass of the water (105 g), c2 is the specific heat capacity of water (4.18 J/g°C), and ΔT2 is the change in temperature (final temperature - initial temperature of the water).
Since the copper block and the water reach equilibrium, Q1 = Q2. Therefore, we can equate the two equations:
m1 * c1 * ΔT1 = m2 * c2 * ΔT2
Substituting the given values:
(40 g) * (0.39 J/g°C) * (95°C - initial temperature) = (105 g) * (4.18 J/g°C) * (24°C - initial temperature)
Simplifying the equation and solving for the initial temperature of the water gives us approximately 81.67°C.
for such more questions on temperature
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If the force causing a mass to accelerate is multiplied by a number while keeping the mass the same, what happens to the acceleration of the object?
Answer: If mass remains constant and you double the force you will double the acceleration.
What can affect the acceleration of objects? (multiple choice)
a. the objects have the same force acting on them
b. none of the above
c. the objects have the same force and mass acting on them
d. the objects have the same shape but different masses.
Which chemical equation obeys the Law of Conservation of Mass?
A. 2NO2 → O2 + N2
B. 2NO2 → O2 + 2N2
C. 2NO2 → 2O2 + N2
D. NO2 → O2 + N2
Answer:
c according to me the correct answer is C
Who was the first man on planet Jupiter
What is it called when you extend the graph, along the same slope, above or below measured data?
a. Extrapolate
b. Interpolate
a. Examine
d. Experiment
b interpolate loskkdkskmdrmdr
If a vehicle accelerating at 2.7 m/s2what is it's velocity at 20 meters 12.63m/s,1.03m/s,10.39m/s,6.39m/s
Answer:
The final velocity of the vehicle is 10.39 m/s.
Explanation:
Given;
acceleration of the vehicle, a = 2.7 m/s²
distance moved by the vehicle, d = 20 m
The final velocity of the vehicle is calculated using the following kinematic equation;
v² = u² + 2ah
v² = 0 + 2 x 2.7 x 20
v² = 108
v = √108
v = 10.39 m/s
Therefore, the final velocity of the vehicle is 10.39 m/s.
A machine with a mechanical advantage of 10 is used to produce an output force of 250 Newton’s. What input force is applied to this machine
Answer:
que tue nesisitas
Explanation:
39. I also use it when I do the homework. (par 1 line 3).
The underlined word has the closest meaning with...
a. assignment
b. agreement
c. dictionary
d. teamwork
Answer:
A
Explanation:
If you are inside a car and the car is struck by lightning, it is best to stay inside because the electric field inside the car is ________?
Answer:
Get out if the car
Explanation:
Get out of the car because the car could explode by over eclectic power
get out of the car as fast as possible
if volume is constant and heat is added, what happens to the
temperature and pressure?
- increases
- decreases
- stays the same
Answer:
the temperature would Increase and pressure would increase
Explanation:
This would occur because the temperature would move to the liquid through conduction and the pressure would increase because the heat would cause more and more pressure
Write two reasons for using mercury in a thermometer ️️
Answer:
my first reason is that Mercury is the only one in liquid state at room temperature and thermometers because it has high coefficient of expansion . my second reason is that mercury its can changes in temperature, the mercury expands and contracts, and the temperature can be read from the scale, and also Mercury thermometers can be used to determine body, liquid, and vapor temperature.
match the quote about working in government to the correct branch. Then name
the article that describes the powers of this branch.(Giving Brainlist and doubling points for Correct answer!)
Matching the quote about working in government to the correct branch will give us:
The second bubble describes the power of the executive branch
The third bubble describes the power of the judicial branch
The first bubble describes the power of the legislative branch
What is the executive branch?The power of the Executive Branch is vested in the President of the United States, who also acts as head of state and Commander-in-Chief of the armed forces.
The executive branch or is the part of government that enforces law, and has responsibility for the governance of a state.
In political systems based on the principle of separation of powers, authority is distributed among several branches (executive, legislative, judicial)—an attempt to prevent the concentration of power in the hands of a single group of people.
The executive enforces the law as written by the legislature and interpreted by the judiciary.
The executive can be the source of certain types of law, such as a decree or executive order. Executive bureaucracies are commonly the source of regulations.
What is the judicial branch?The third branch of government is the Judicial branch. The Judiciary is made up of courts -- Supreme, Circuit, the magistrate (local) and municipal (city) courts. The Judicial branch interprets the laws.
The state judges are elected by the citizens rather than being appointed. They also run for their office as members of a political party.
The judiciary is the system of courts that interprets, defends, and applies the law in the name of the state. The judiciary can also be thought of as the mechanism for the resolution of disputes.
In many jurisdictions, the judicial branch has the power to change laws through the process of judicial review.
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Aranza is 17 years old. What is her Target Heart Rate at 70%? I will give brainliest
Answer:
Her target Heart rate is maybe around 141-172.
Explanation:
hope this is helpful!
What is the kinetic energy of a ball at rest with a mass of 10 Kg?
а 100j
b 0j
c 10j
d 1000j
Answer:
B 0j
Explanation:
It is at rest, not moving
Two students push on a box in the same direction and a third student pushes in the
opposite direction. What is the net force on the box if each push with a force of 50 N?
A.50 N towards the side with one student
B.50 N towards the side with two students
C.150N
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Love:
⊂ヽ
＼＼ Λ＿Λ
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> ⌒ヽ
/ へ＼
/ / ＼＼
ﾚ ノ ヽ_つ
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( (ヽ
| |、＼
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ノ ) Lﾉ
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Life:
⊂ヽ
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＼( ˘ω˘ )
> ⌒ヽ
/ へ＼
/ / ＼＼
ﾚ ノ ヽ_つ
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( (ヽ
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Dream:
⊂ヽ
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> ⌒ヽ
/ へ＼
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URGENT PLEASE HELP!!!! GIVING BRAINLIEST!! If you answer this correctly ill answer some of your questions you have posted! (60pts)
Answer:
5
Explanation:
100 newtons pulling a 500 newton object has the mechanical advantage of 5 since it pulled 5x its weight
the expression is simple: 500/100= 5 (5 is the mechanical advantage)
pls mark me brainliest if this is right lol ty
How could you calculate the elasticity of a collision if you know the approach velocity and separation velocity of the colliding objects
Answer: Based on your table, how could you calculate the elasticity of a collision if you know the approach velocity and separation velocity of the colliding objects? You can calculate the elasticity of a collision by dividing separation velocity by approach velocity (Equation: Vs/Va).
Explanation:
plz mark me branilest
→ [tex]Elastic \ collision = \frac{V_s}{V_a}[/tex]
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Which of the following is a subatomic particle?
Particle
Atom
Neutron
Element
Answer:
neutron.
Explanation:
subatomic particles include,
neutron.
proton.
electron.
hope it helps. :)
What is the name for the amount of energy transferred every second by an electrical appliance?
The most appropriate term used for the amount of energy transferred every second by an electrical appliance would be electric power.
What is power?The rate of doing work is known as power. The Si unit of power is the watt.
Power =work/time
The mathematical expression for the power is as follows,
P = VI
where P is the power
V is the voltage
As given in the problem we have to find out the name of the term used for the amount of energy transferred every second by an electrical appliance,
The electric power = The amount of energy transferred / time for use of appliances
Thus, Electric power would be the most appropriate term to describe the quantity of energy transferred by an electrical item per second.
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1. The force due to gravity acting on an object is called what?
Answer:
Near the surface of the earth such objects are accelerating. This acceleration is due to the gravitational force acting between the objects and the earth. ... It points straight downward towards the center of the earth. The force of gravity acting on an object is called its weight.
10. The force that causes damage to objects during a collision is
friction
kinetic energy
momentum
inertia
what will happen when two wave pulses that are the same size approach one another from opposite directions?
Are all sound frequencies audible to the human ear? Why or Why not?
Answer:
thank you
Explanation:
what is the role of neutrons in the nucleus.
Answer:
To be neutral
Explanation:
Neutrons are electrically neutral but contribute to the mass of a nucleus to nearly the same extent as the protons. Neutrons can explain the phenomenon of isotopes (same atomic number with different atomic mass). The main role of neutrons is to reduce electrostatic repulsion inside the nucleus.
Answer: The role of neutrons is to reduce electrostatic repulsion inside the nucleus.
Explanation:
Because they are neutral, so they help hold the nucleus together.
The efficiency of lever is always less than 100%why
Answer:
The output work is always less than the input work because some of the input work is used to overcome friction. Therefore, the efficiency is always less than 100 percent.
10. Forces have different effects
Use the correct answer from the box to complete the sentence.
Slowing
Stretching
Turning
The moment of a force is the __________ effect of the force
Answer:
turning
Explanation:
because the moment of a force is for pivots
the moment of a force can be clockwise motion and anti clockwise motion
hope this helps