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
ehidna [41]
3 years ago
11

Using your own words, describe why melting ice with salt freezes cream. Describe how you could change the setup to freeze the cr

eam faster, to produce colder temperatures or to cool other substances.
Physics
1 answer:
max2010maxim [7]3 years ago
3 0

Answer:

-salt raises the melting point of the ice. Mix ice with salt then put the bottle of cream in the ice-salt mixture to freeze the cream.

Explanation:

-Salt lowers the freezing point of water in a phenomena called freezing point depression.

-Mix the ice with salt to lower it's freezing point below zero.

-Now, put the bottle of cream in the mixture, the ice will freeze faster due to the lowered temperature.

You might be interested in
A loaf of bread (volume 3100 cm3) with a density of 0.90 g/cm3 is crushed in the bottom of the grocery bag into a volume of 1240
andrew11 [14]

Answer:

2,25 g/cm3

Explanation:

Hi, you have to know one thing for this.. Density = mass/Volume,

When you have the loaf of bread with 3100 cm3 and a density of 0.90 g/cm3, the mass of that bread is 2790 g because of if you isolate the variable mass from the equation you get..  mass= density x volume

Later, have on account the mass never changes, so you crush the bread and the mass is the same.. so when you have the mashed bread.. you know that the mass is 2790 g and the volume of the bag is 1240 cm3, so you apply the main equation.... density=2790 g / 1240 cm3 , so density =  2,25 g/cm3

8 0
3 years ago
As an intern at an engineering firm, you are asked to measure the moment of inertia of a large wheel for rotation about an axis
klio [65]

Hi there!

We can begin by finding the acceleration of the block.

Use the kinematic equation:

d = v_0t + \frac{1}{2}at^2

The block starts from rest, so:

d = \frac{1}{2}at^2\\\\12 = \frac{1}{2}a(4^2)\\\\\frac{24}{16} = a = 1.5 m/s^2

Now, we can do a summation of forces of the block using Newton's Second Law:

F = ma = m_bg - T

mb = mass of the block

T = tension of string

Solve for tension:

T = m_bg - ma = 8.2(9.8) - 8.2(1.5) = 68.06 N

Now, we can do a summation of torques for the wheel:

\Sigma \tau = rF\\\\\Sigma\tau = rT

Rewrite:

I\alpha = rT

We solved that the linear acceleration is 1.5 m/s², so we can solve for the angular acceleration using the following:

\alpha = a/r\\\\\alpha = 1.5/.42= 3.57 rad/sec^2

Now, plug in the values into the equation:

I(3.57) = (0.42)(68.06)\\\\I = (0.42)(68.06)/(3.57) = \boxed{8.00 kgm^2}

8 0
3 years ago
The Capacitive reactance of a 0.094uF capacitor when a frequency of 25kHz is applied is lus 68 Ohms 0.68 Ohms luf
Nana76 [90]

Answer:

Capacitive reactance of the capacitor is 68 ohms

Explanation:

It is given that,

Capacitance, C=0.094\ \mu F=0.094\times 10^{-6}\ F

Frequency, f=25\ kHz=25\times 10^3\ Hz

Capacitive reactance is given by :

X_C=\dfrac{1}{2\pi fC}

X_C=\dfrac{1}{2\pi 25\times 10^3\times 0.094\times 10^{-6}}

X_C=67.72\ \Omega

or

X_C=68\ \Omega

So, the capacitive reactance of the capacitor is 68 ohms. Hence, this is the required solution.

8 0
3 years ago
The tendency for an object at rest to remain at rest
Zarrin [17]
Inertia is the force in play here
7 0
3 years ago
A)
Ksenya-84 [330]

Answer:

50N

Explanation:

is the opposing fotce

4 0
3 years ago
Other questions:
  • Charge Q is distributed uniformly throughout the volume of an insulating sphere of radius R = 4.00 cm. At a distance of r = 8.00
    11·1 answer
  • A horizontal spring-mass system has low friction, spring stiffness 160 N/m, and mass 0.3 kg. The system is released with an init
    14·1 answer
  • Sound waves move the fastest through which medium?
    5·2 answers
  • What is another name for the electromagnetic spectrum?
    5·1 answer
  • A 600kg car is at rest , and then accelerates to 5n/s what is the original kinetic energy?
    9·1 answer
  • Muscles make up ore than __ of a person body?<br>a.10<br>b.25<br>c40<br>d.75
    13·2 answers
  • On which planet would a 15.0 kg object weigh the most? How much would a 15.0 kg object weigh on that planet? Round the answer to
    13·2 answers
  • How can we show magnetic field lines?
    11·2 answers
  • Does an eclipse occur every time the moon is in the new or full moon phase?
    6·2 answers
  • A spring has a natural length of 28.0 cm. If a 23.0-N force is required to keep it stretched to a length of 36.0 cm, how much wo
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!