1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
seropon [69]
3 years ago
8

In un lento processo di riscaldamento di 200 g di H2O da 60 gradi a 100 gradi evaporano 10 g di H2O. Assumendo per il calore lat

ente di vaporizzazione dell'H2O il valore costante di 540 cal/g, stabilire , con un calcolo di prima approssimazione, il calore totale che si deve fornire all'H2O per eseguire il riscaldamento
soluzione: Q=13 000 circa cal
Physics
1 answer:
Lyrx [107]3 years ago
7 0

https://www.khanacademy.org/science/physics/thermodynamics/specific-heat-and-heat-transfer/v/specific-heat-and-latent-leat-of-fusion-and-vaporization-2

https://www.khanacademy.org/science/physics/thermodynamics/specific-heat-and-heat-transfer/v/specific-heat-and-latent-leat-of-fusion-and-vaporization-2

This link might help

You might be interested in
Help plz will give brainliest
vazorg [7]

Answer:

The forces acting on the root beer is the ice cream. This means that the 'air' in the ice cream keeps it at the top of the root beer enabling it to float right at the top.

4 0
3 years ago
Definition: A command economy is where a central government makes all economic decisions. The government or a collective owns th
denis-greek [22]
A command economy<span> is a system where the government, rather than the free market, determines what goods should be produced, how much should be produced and the price at which the goods are offered for sale.</span>
7 0
3 years ago
The solid steel shaft AC has a diameter of 25 mm and is supported by smooth bearings at D and E. It is coupled to a motor at C ,
Degger [83]

Answer:

Maximum shear stress in region AB=1.04 MPa

Maximum shear stress in region BC=3.11 MPa

Explanation:

The explanation is attached in the attachments.

4 0
3 years ago
A certain atom has atomic number Z = 25 and atomic mass number A = 52. a. What is the approximate radius of the nucleus of this
wlad13 [49]

Answer:

a)The approximate radius of the nucleus of this atom is 4.656 fermi.

b) The electrostatic force of repulsion between two protons on opposite sides of the diameter of the nucleus is 2.6527

Explanation:

r=r_o\times A^{\frac{1}{3}}

r_o=1.25 \times 10^{-15} m = Constant for all nuclei

r = Radius of the nucleus

A = Number of nucleons

a) Given atomic number of an element = 25

Atomic mass or nucleon number = 52

r=1.25 \times 10^{-15} m\times (52)^{\frac{1}{3}}

r=4.6656\times 10^{-15} m=4.6656 fm

The approximate radius of the nucleus of this atom is 4.656 fermi.

b) F=k\times \frac{q_1q_2}{a^2}

k=9\times 10^9 N m^2/C^2 = Coulombs constant

q_1,q_2 = charges kept at distance 'a' from each other

F = electrostatic force between charges

q_1=+1.602\times 10^{-19} C

q_2=+1.602\times 10^{-19} C

Force of repulsion between two protons on opposite sides of the diameter

a=2\times r=2\times 4.6656\times 10^{-15} m=9.3312\times 10^{-15} m

F=9\times 10^9 N m^2/C^2\times \frac{(+1.602\times 10^{-19} C)\times (+1.602\times 10^{-19} C)}{(9.3312\times 10^{-15} m)^2}

F=2.6527 N

The electrostatic force of repulsion between two protons on opposite sides of the diameter of the nucleus is 2.6527

6 0
3 years ago
A small dog is trained to jump straight up a distance of 1.2 m. How much kinetic energy does the 7.2-kg dog need to jump this hi
LUCKY_DIMON [66]
Answer:84.672 joules.

Explanation:

1) Data:

m = 7.2 kg
h = 1.2 m
g = 9.8 m / s²

2) Physical principle

Using the law of mechanical energy conservation principle, you have that the kinetic energy of the dog, when it jumps, must be equal to the final gravitational potential energy.

3) Calculations:

The gravitational potential energy, PE, is equal to m × g × h

So, PE = m × g × h = 7.2 kg × 9.8 m/s² × 1.2 m = 84.672 joules.

And that is the kinetic energy that the dog needs.
8 0
3 years ago
Other questions:
  • An 80 kg man is standing in an elevator which is moving down and slowing down at a rate of 2.0 m/s2. how hard must the floor of
    10·1 answer
  • Consider the motion of a bullet that is fired from a rifle 6 m above the ground in a northeast direction. The initial velocity o
    8·1 answer
  • The elements helium neon and Zion are all part of the same___on the periodic table
    7·1 answer
  • Find the net rate of heat transfer by radiation in watts from a skier standing in the shade, given the following. She is complet
    9·1 answer
  • Please help on magnitude !
    6·1 answer
  • What properties does a loud, shrill whistle have? a.) high amplitude, high frequency
    7·1 answer
  • Which of the following characteristics are displayed by hard magnetic materials?
    9·1 answer
  • Suppose someone gives you an alloy that is made of both zinc and nickel. In general, how do you think the physical properties of
    13·1 answer
  • A 1kg sphere rotates in a circular path of radius 0.2m from rest and it reaches an angular speed of 20rad/sec in 10 second calcu
    11·1 answer
  • The first law of motion is also called as law _ fill up the blanks ​
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!