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ankoles [38]
2 years ago
11

PLEASE HELP DUE TODAY!!

Physics
1 answer:
77julia77 [94]2 years ago
3 0

Answer:

1. −1.10400000*10^−17

2.5,750

3. 27 electrons = −4.32000000*10^−18

4. Don't remember how to do

5) Same, don't remember how to do

Explanation:

Hope this at least helped

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If it requires 5.0 j of work to stretch a particular spring by 1.8 cm from its equilibrium length, how much more work will be re
ANEK [815]
15.277.. j. I did the problem using a proportion. an additional 3.7m to the current 1.8 cm=5.5cm.

Therefore, 5.0 j/1.8cm=x/5.5cm
5 0
3 years ago
A tank holds a 1.44-m thick layer of oil that floats on a 0.98-m thick layer of brine. Both liquids are clear and do not intermi
denpristay [2]

Answer:

Angle of ray makes with the vertical is 62.1 degree

Explanation:

As per the ray diagram we know that the angle of incidence on oil brine interface will be given as

tan\theta_i = \frac{0.7}{0.98}

\theta_i = 35.5^0

now by Snell'a law at that interface we have

\mu_1 sin\theta_i = \mu_2 sin \theta_r

now we will have

1.52  sin35.5 = 1.40 sin\theta_r

\theta_r = 39.12^0

now this is the angle of incidence for oil air interface

so now again by Snell's law we will have

\mu_2 sin\theta_i' = \mu_{air} sin\theta

1.40 sin39.12 = 1 sin\theta

\theta = 62.1^0

3 0
3 years ago
Which is more accurate slope o average?
Novay_Z [31]
As long as the graph is a straight line they both will give same answer. Edit: In the case of errors,I think the most fitting slope line is more accurate method,because taking average is same as drawing a line from initial to final point of the line and taking its slope.
Hope it helps
5 0
3 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
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At what condition do a coin and a feather fall together? What is the acceleration of the coin and feather at that instant? Justi
Dimas [21]

Answer:

If a coin and a feather are dropped from the same height at the same time on the moon’s surface, they fall together. Ans: It is because Gravity of the moon is six times less than that of the earth, therefore coin and a feather are fall together.

3 0
2 years ago
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