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
Harlamova29_29 [7]
3 years ago
8

What is the best free energy source? Nuclear Solar Natural Gas

Physics
1 answer:
Free_Kalibri [48]3 years ago
4 0
Solar it is the cheapest and widely used energy source
You might be interested in
Calculate the efficiency of given pulley System if 40N
jonny [76]

Answer:

20n

Explanation:

60n - 40n = efficiency of pulley system

20n = efficiency of pulley system

4 0
2 years ago
Define in own words.
professor190 [17]

A recurring illness or an illness that lasts for a long time. Chronic illnesses are typically very hard to cure.

8 0
3 years ago
Problem 1. Cylinders and a pendulum A uniform solid cylinder of radius r and mass m can roll inside a hollow cylinder of radius
Nataliya [291]

Answer:

The two answers are in the explanation

Explanation:

Please find the attached files for the solution

7 0
4 years ago
You place a cup of 210 degrees F coffee on a table in a room that is 68 degrees F, and 10 minutes later, it is 200 degrees F. Ap
Inga [223]
The answer is 35 minutes

The Newton's law of cooling is:
T(x) = Ta + (To - Ta)e⁻ⁿˣ

T(x) - the temperature of the coffee at time x
Ta - the ambient temperature
To - the initial temperature
n - constant

step 1. Calculate constant k:

We have:
T(x) = 200°F
x = 10 min
Ta = 68°F
To = 210°F
n = ?

T(x) = Ta + (To - Ta)e⁻ⁿˣ
200 = 68 + (210 - 68)e⁻ⁿ*¹⁰
200 = 68 + 142 * e⁻¹⁰ⁿ
200 - 68 = 142 * e⁻¹⁰ⁿ
132 = 142 * e⁻¹⁰ⁿ
e⁻¹⁰ⁿ = 132/142
e⁻¹⁰ⁿ = 0.93

Logarithm both sides with natural logarithm:
ln(e⁻¹⁰ⁿ) = ln(0.93)
-10n * ln(e) = -0.07
-10n * 1 = - 0.07
-10n = -0.07
n = -0.07 / - 10
n = 0.007

Step 2. Calculate time x when T(x) = 180°F:
We have:
T(x) = 180°F
x = ?
Ta = 68°F
To = 210°F
n = 0.007

T(x) = Ta + (To - Ta)e⁻ⁿˣ
180 = 68 + (210 - 68)e⁻⁰.⁰⁰⁷*ˣ
180 - 68 = 142 * e⁻⁰.⁰⁰⁷*ˣ
112 = 142 * e⁻⁰.⁰⁰⁷⁾*ˣ
e⁻⁰.⁰⁰⁷*ˣ = 112/142
e⁻⁰.⁰⁰⁷*ˣ = 0.79

Logarithm both sides with natural logarithm:
ln(e⁻⁰.⁰⁰⁷*ˣ) = ln(0.79)
-0.007x * ln(e) = -0.24
-0.007x * 1 = -0.24
-0.007x = -0.24
x = -0.24 / -0.007
x ≈ 35
5 0
3 years ago
Read 2 more answers
TUL<br> Which of the following terms refers to the exactness of a measurement?
Oksana_A [137]

Accuracy

Explanation:

Accuracy is a term that refers to the exactness of a measurement.

Accuracy is the nearness of measured value to the true value.

The difference between the measured value and the true value is the uncertainty in the measurement.

  • The closer a measured value is to the true value, the more accurate the measurement is. The lesser the error accrued in the process.

learn more;

Probability brainly.com/question/6649771

#learnwithBrainly

5 0
3 years ago
Other questions:
  • When is the data considered valid
    12·1 answer
  • A roller coaster car moving at a velocity of 30 meters/second has a momentum of 2.5 _ 104 kilogram meters/second. What is its ma
    15·1 answer
  • Is the part of the microscope that allows you to adjust the light?
    14·1 answer
  • What are 3 things that can affect gravity?
    10·1 answer
  • The velocity of a wave is 500 m/s . The wavelength of the wave is 3.2 m . What is the frequency of the wave ?
    5·1 answer
  • How much power is needed to produce 500 joules of work if 20 watts are used?
    8·2 answers
  • Carbon has six protons. Which model shows a neutral atom of carbon? ​
    9·1 answer
  • In a racquetball game, your opponent repeatedly hits the same type of serve off the front wall and it lands in approximately the
    12·2 answers
  • which will have longer shadow: ben whose height is 5 feet tall and 2 inches or his brother mike who is 6 feet and 2 inches when
    10·1 answer
  • In this model, the velocity of the spacecraft at position 2 is the velocity of the craft at position 4. at position 1, the direc
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!