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
BigorU [14]
3 years ago
14

According to Newton's Law of Cooling, if a body with temperature T 1 is placed in surroundings with temperature T 0, different f

rom that of T 1, the body will either cool or warm to temperature T(t) after t minutes, where:
T(t) = T 0 + (T 1 - T 0)e kt

and k is a constant.

A cup of coffee with temperature 140°F is placed in a freezer with temperature 0°F. The constant k ≈ -0.0815. Use Newton's Law of Cooling to find the coffee's temperature, to the nearest degree Fahrenheit, after 15 minutes.

The temperature is about
degrees Fahrenheit.
Physics
2 answers:
Mila [183]3 years ago
3 0

We can substitute the given values into the equation for T, given the surrounding temperature T0 = 0, initial temperature T1 = 140, constant k = -0.0815, and time t = 15 minutes.

T = 0 + (140 - 0)e^(-0.0815*15) = 140e^(-1.2225) = 41.23°F

Anon25 [30]3 years ago
3 0

Answer:

-34º

Explanation:

You might be interested in
A pulley block and tackle is used to lift a piano. The piano weighs 2000N. If the worker used 100 N of force to lift the piano,
kherson [118]
10 because it’s right
4 0
3 years ago
What are the effects of gravity on earth?​
Sliva [168]

Answer:

Without it, we could not survive on Earth. Earth orbits the sun due to the gravity of the sun, which maintains us at a convenient distance from it to enjoy the sun's warmth and light. It keeps the air we need to breathe and our atmosphere in place. Our planet is held together by gravity.

5 0
2 years ago
Read 2 more answers
What is the current in milliamperes produced by the solar cells of a pocket calculator through which 4.2 C of charge passes in 2
Leni [432]

Answer:

<h2>0.432mA</h2>

Explanation:

Current produced by the solar cells of the pocket calculator is expressed using the formula I = Q/t where;

Q is the charge (in Columbs)

t is the time (in seconds)

Given parameters

Q = 4.2C

t = 2.7 hrs

t = 2.7*60*60

t = 9720 seconds

Required

Current produced by the solar cell I

Substituting the given values into the formula;

I = 4.2/9720

I = 0.000432A

I = 0.432mA

Hence, the current in milliamperes produced by the solar cells of a pocket calculator is 0.432mA

5 0
3 years ago
If the roller coaster car in the above problem were moving at twice the speed, then what would be its new kinetic energy
Xelga [282]

Answer:

it would move faster

Explanation:

8 0
3 years ago
Plz help me<br> it is easy for you maybe but for me i am new to it
xeze [42]

Explanation:

the gradient is also know as the slope and is denoted by m" so the slope is 20/100

8 0
3 years ago
Read 2 more answers
Other questions:
  • Which answer below correctly identifies the type of change and the explanation for the heating of copper sulfate pentahydrate?
    5·1 answer
  • If a stone dropped into a well reaches the water's surface after 3.0 seconds, how far did the stone drop before hitting the wate
    10·2 answers
  • The table below shows the acceleration of gravity on different bodies in the solar system.
    14·2 answers
  • "How much work is required to lift an object with a mass of 5.0 kilograms to a height of 3.5 meters?" What would be the formula
    14·1 answer
  • Your spaceship lands on an unknown planet. To determine the characteristics of this planet, you drop a wrench from 3.00 m above
    12·1 answer
  • At one point in a pipeline, the water's speed is 3.57 m/s and the gauge pressure is 68.7 kPa. Find the gauge pressure at a secon
    12·1 answer
  • What is the speed of a wave with a wavelength of 10 mm and a frequency of 5.0 Hz?
    12·2 answers
  • g A small object of mass 2.5 g and charge 18 uC is suspended motionless above the ground when immersed in a uniform electric fie
    9·1 answer
  • Metamorphic rock occurs when you take any other type of rock and put them under ________ and ______________, and they twist and
    15·1 answer
  • Here is extra free p-o-i-n-t-s hope yall have a wonder full day!
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!