Explanation:
Given : S=400Jkg
−1
C
−1
and L
f
=3.5×10
5
Jkg
−1
Mass of copper block m=2kg
Heat released by the copper block is equal to the heat gained by the ice to melt.
Let the mass of the ice melted be M.
Change in temperature of copper block ΔT=500−0=500
o
C
∴ mS(ΔT)=ML
f
Or 2×400×500=M×3.5×10
5
⟹ M=1.14kg
hope it help u
We have that If a 2kg block of copper is heated and a temperature increase of 50C is measured,the energy has been provided is
E=418KJ
From the question we are told
If a 2kg block of copper is heated and a temperature increase of 50C is measured, how much energy has been provided?
Generally the equation for the Energy is mathematically given as
[tex]E=mC(T_1-T_2)\\\\E=2*4180(50)\\\\E=418000J\\\\E=418KJ[/tex]
Therefore
If a 2kg block of copper is heated and a temperature increase of 50C is measured,the energy has been provided is
E=418KJ
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HELP!!!! ASAP!! Two ballons rubbed on the same material are Brought clos3 to each other.what was likely to be observed? A. they burst B .attract C.repel D. no change
Answer:
B
Explanation:
helicopter flies an average velocity of 70 m/s2 for 10.0 seconds. What ios ther magnitude of the helicopter's displacement? answer should have 3 significant figures
The uniform movement allows finding the results for the helicopter displacement during the 10 s is: 700 m
Kinematics studies the motion of bodies, finding relationships between the position, velocity and acceleration of the body, in the special case that the acceleration is zero, it is called uniform motion and is described by the equation
[tex]v = \frac{\Delta s}{t}[/tex]
Where v is the average velocity, Ds is the displacement and t is the time
Δs = v t
They indicate that the average speed is 70 m / s and the travel time is t=10.0s
Let's calculate
Δs = 70 10.0
Δs = 700 m / s
In conclusion using the uniform movement we can find the results for the helicopter displacement is: 700 m
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The magnitude of the helicopter's displacement is 700 meters.
Given the following data:
Velocity = 70 m/sTime = 10 seconds.To find the magnitude of the helicopter's displacement:
Velocity can be defined as the rate of change in displacement (distance) with time.
Also, velocity is a vector quantity and as a result of this, it has both magnitude and direction.
Mathematically, velocity is given by the formula;
[tex]Velocity = \frac{displacement}{time}[/tex]
Making displacement the subject of formula, we have:
[tex]Displacement = velocity[/tex] × [tex]time[/tex]
[tex]Displacement = 70[/tex] × [tex]10[/tex]
Displacement = 700 meters.
Therefore, the magnitude of the helicopter's displacement is 700 meters.
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Which object is in the sample of chemical change?
* Digesting a salad
* Mixing a salad dressing
* Dicing an onion
* Preparing a salad
Can someone answer this quickly, sorry if it’s rushed. ~Ty
Answer:
Digesting a salad
Explanation:
All the other ones are physical changes because you're changing its form but not its chemical identity and not changing the substance. Digesting a salad is a chemical change because you're both changing its form AND its chemical identity
calculate the volume of sphere with radius 7 cm
Explanation:
the formula is:
[tex](4\pi \times r {}^{3} ) \div 3 [/tex]
where r is the radius
so
(4π × 7³) ÷ 3 =
(4π × 343) ÷ 3 =
[tex] \frac{1372\pi}{3} [/tex]
Answer:
V=4 /3πr3
=4/ 3·π·73
≈1436.75504cm³
Explanation:
answer??????
pls help
--------------
Answer:
Explanation:
electroscope
Answer:
I think electroscope.
If the force squeezing two surfaces together is decreased, the force of dry sliding friction between the two surfaces will most likely: a. increase b. decrease c. stay about the same
If the force squeezing two surfaces together is decreased, the force of dry sliding friction between the two surfaces will most likely decrease.
therefore your answer is B)decrease
Hope this helps you- have a good day bro cya)
The force of dry sliding friction between the two surfaces will most likely decreases.
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.
If the force squeezing two surfaces together is decreased, the force of dry sliding friction between the two surfaces will most likely decrease.
The force of dry sliding friction between the two surfaces will most likely decreases.
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You kick a ball with a speed of 18 m/s at an angle of 32°. How far away does the ball land
Answer:
d = V^2/g*sin(32*2) = 18^2/9.8*0.90 = 29.72 m
Explanation:
nakuha ko den sa brainly :,) so di sakin tong sagot na toh
Un alambre de 2m de longitud soporta una carga de 5400 N. El diámetro de la sección transversal es de 2 mm y el módulo de Young es de 4.2x1010 N/m2. Determine el alargamiento del alambre.
Which list correctly orders effort (E), fulcrum (F), and load (L) for each lever class? (1 point)
class 1 = F, E, L (or L, E, F)
o class 2 = L, F, E (or E, F, L)
class 3 = F, L, E (or E, L, F)
class 1 = F, L, E (or E, L, F)
o class 2 = F, E L (or L, E, F)
class 3 = L, F, E (or E, F, L)
class 1 = L, F, E (or E, F, L)
o class 2 = F, L, E (or E, L, F)
class 3 = F, E, L (or L, E, F).
class 1 = F. E, L (or L, E, F)
o class 2 = F, L, E (or E, L, F)
class 3 = L. F. E (or E, F. L)
The list that correctly orders effort (E), fulcrum(F) and load (L) for each lever class is
class 1 = L, F, E (or E, F, L) class 2 = F, L, E (or E, L, F) class 3 = F, E, L (or L, E, F).Machine are instruments that make work easier, faster, and convenient to do,
The lever is an example of the machine and we have 3 classes of lever depending on the position of the Load, Effort, and Fulcrum.
Three types of lever are;
First-class lever - The fulcrum (F) is between the Load and the effortSecond class lever: The load (L)is between the effort (E) and the fulcrum(F).Third class lever: The effort (E) is between the load (L) and the fulcrum (F)Learn more here: https://brainly.com/question/24115317
Help me to solve it . It’s urgent
Answer: 0°
Explanation:
Step 1: Squaring the given equation and simplifying it
Let θ be the angle between a and b.
Given: a+b=c
Squaring on both sides:
... (a+b) . (a+b) = c.c
> |a|² + |b|² + 2(a.b) = |c|²
> |a|² + |b|² + 2|a| |b| cos 0 = |c|²
a.b = |a| |b| cos 0]
We are also given;
|a+|b| = |c|
Squaring above equation
> |a|² + |b|² + 2|a| |b| = |c|²
Step 2: Comparing the equations:
Comparing eq( insert: small n)(1) and (2)
We get, cos 0 = 1
> 0 = 0°
Final answer: 0°
[Reminders: every letters in here has an arrow above on it]
составьте сложный план к тексту казахстан принимает азиаду
Answer:
no hablo russian
how long does it take to charge a 64-kwh battery from 0 to full using a level 1, 120v charger?
The time required to charge the 64 kwh battery from 0 to full is 45.7 hours.
A level 1 120 V charger supplies a power of 1.4 kW at 20 A.
Since we need to charge a 64 kwh battery with a level 1 120 V charger, the total energy required by the battery is E = 64 kwh.
Since the power rating from the charger is P = 1.4 kW, we know that
energy, E = power, P × time
So, time = energy/power
So, the time required to charge the 64 kwh battery from 0 to full is
time = 64 kwh/1.4 kW
= 45.71 hours
≅ 45.7 hours
So, the time required to charge the 64 kwh battery from 0 to full is 45.7 hours.
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How do the force factors compare to the products of the masses?
Answer:
The force is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.
HELP Where would you predict the highest atmospheric pressure?
A. In the southwest
B.In the northwest
C. In the southeast
D. In the northeast
Answer:
B
Explanation:
The correct answer is B: in the northwest.
Explain why a person's hand will not go through a wall when the person pushes on it
Answer:
BECAUSE WALL IS SOLID .......
What does Newton's second law describe?
A. How inertia affects the motion of an object
B. The relationship between force, mass, and acceleration
C. Action-reaction pairs
D. How friction and the normal force are related
true or false
your mass would be the same on the moon as it is on the earth??
I need helppp
Answer: False
Explanation: The Earth has more gravitational pull than the moon.
When does he reach the stick?
Answer:
more information? who?
Explanation:
URGENT PLEASE HELP
A ball is thrown upward from the top of a 22.0 m tall building. If the ball's initial speed is 11.0 m/s and travels to a height of 6.2 m, with what final velocity does the ball hit the ground?
Answer:
It is launched with a speed of 11 m/s.
Explanation:
least three different types of energy
Answer:
Kinetic, Potential, and Chemical energy
Explanation:
If you want to know the six basic ones they are, chemical, electrical, radiant, mechanical, thermal and nuclear energy. Hope this helps!
Answer:
If talking about forms of energy, the answer would be:
Kinetic, potential, and chemical energy
If asking for types, the answer could be:
Nuclear, Electrical, and Thermal
. Choose one of the compounds from numbers of atoms in your formula .
methylene carbene
Sodium carbide
Diatomic carbon
Hydrogen gas
Acetylene
Tricarbon
diamond
Answer:
carbon
Explanation:
Jus answer pls I’m done with physics
5. 35 - (-20) = 55
6. [tex]v_{av}=\frac{\Delta s}{\Delta t}=\frac{20-(-20)}{6-0} =\frac{40}{6} =6.67[/tex]
7. D and G
8. A, C, and E
9.
At t = 19,
[tex]s=\frac{s_{final}-s_{initial}}{t_{final}-t_{initial}}(t_1-t_{initial})+s_{initial}=\frac{40-(-20)}{23-18}(19-18)-20=12-20= -8[/tex]
At t = 27,
[tex]s=\frac{s_{final}-s_{initial}}{t_{final}-t_{initial}}(t_1-t_{initial})+s_{initial}=\frac{0-40}{29-26}(27-26)+40=\frac{-40}{3}+40=26.67[/tex]
Therefore, displacement between t = 19 and t = 27 is:
26.67 - (-8) = 34.67
10. [tex]v=\frac{\Delta s}{\Delta t}=\frac{0-40}{29-26}=-13.33[/tex]
11. -20
12. [tex]v=\frac{\Delta s}{\Delta t}=\frac{20-(-20)}{6-0}=\frac{40}{6}=6.67[/tex]
heeelllllpppp plleeeaaassseee
Explanation:
We call the magnitude of the charge of an electron as ELEMENTARY CHARGE.
when the driver of a car applies the brakes a force of 4000N brings the car to a stop over a distance of 50m.calculate the work done by the braking force.
Answer:
W = F*d
W = 4000*50
W = 200000J
W = 200KJ
the area under a velocity-versus-time graph of an object is
Answer:
Displacement
Explanation:
The area under a velocity-time graph is the displacement. Velocity can be negative if an object is moving backwards.
Sana makatulong!!
what form of energy is released by radioactive particles during a nuclear reaction.
The energy of nuclear fission is released as kinetic energy of the fission products and fragments, and as electromagnetic radiation in the form of gamma rays; in a nuclear reactor, the energy is converted to heat as the particles and gamma rays collide with the atoms that make up the reactor and its working fluid, ...
No one has actually seen any other layers beneath the surface of the Earth.
A: True
B: False
Answer:
A: true
Explanation:
The precision of a balance is ±0.02 g. The accepted value for a measurement is 26.86 g. Which measurement is in the accepted range?
[tex]\sf{ [26.84, 26.88] }[/tex]
Explanation:
The precision of a balance is ±0.02 g.
The accepted value for a measurement is 26.86 g.
The accepted range is:=[26.86-0.02, 26.86+0.02]= [26.84, 26.88]Can someone help me with this? (The answer marked in red text is a incorrect answer)
Answer:
the answer is A
Explanation:
because I just know
Could someone please help me
Answer:
For the first one I Would just draw a triangle type shape going out towards the screen like light is being shined upon it. And the next question I would say the answer is yes.Explanation:
Hope this helps :)
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