Question

Mechanic Physics Question:

A student makes the following measure-ments:a= 5±1 cm,b= 18±2 cm,c= 12±1 cm,t= 3.0±0.5 cm, andm= 18±1 g. Using the generalrules, compute the following quantities with their uncer-tainties and percentage uncertainties:(a)a+b+c,(b)a+b−c,(c)ct, and(d)mb/t.

Answer #1

Consider the following time series data.
Week
1
2
3
4
5
6
Value
18
12
17
11
17
14
Using the naive method (most recent value) as the forecast for
the next week, compute the following measures of forecast
accuracy.
(a)
mean absolute error
MAE =
(b)
mean squared error
MSE =
(c)
mean absolute percentage error (Round your answer to two decimal
places.)
MAPE = %
(d)
What is the forecast for week 7?

Consider the following time series data.
Week
1
2
3
4
5
6
Value
18
12
15
10
18
14
Using the naïve method (most recent value) as the forecast for
the next week, compute the following measures of forecast
accuracy.
(a)
Mean absolute error
If required, round your answer to one decimal place.
(b)
Mean squared error
If required, round your answer to one decimal place.
(c)
Mean absolute percentage error
If required, round your intermediate calculations and final...

NA = 6.022×1023 Ek = 1 2 mv2 T(F°) = T(C°) × 9 5 + 32 MULTIPLE
CHOICE. Choose the one alternative that best completes the
statement or answers the question.
1) Combustion analysis of an unknown compound containing only
carbon and hydrogen produced 17.02 g of CO 2 and 8.721 g of H2O.
What is the empirical formula of the compound? A) C2H5 B) CH2 C) CH
D) C3H8 1)
2) How many moles of CuO can be produced...

Using Gauss’s Law, answer the following
question
An insulator of radius, a = 3 cm is placed inside an SPHERICAL
shell conductor of inner radius b = 7 cm and outer radius c = 12
cm. The conductor has a total charge of Q = - 10 nC. The insulator
has a charge distributed around its volume with charge density
ρ, where the value of ρo = 2 ∗
10−4 C/m3 .
a) Compute the value of the TOTAL charge of...

Consider the following time series
data.
Week
1
2
3
4
5
6
Value
18
14
16
12
17
14
Using the naive method (most recent value) as the forecast for
the next week, compute the following measures of forecast accuracy.
Round the intermediate calculations to two decimal places.
Mean absolute error (to 1 decimal).
Mean squared error (to 1 decimal).
Mean absolute percentage error (to 2 decimals).
%
What is the forecast for week 7 (to the nearest whole...

Consider the following time series data.
Week
1
2
3
4
5
6
Value
18
13
15
12
16
14
c)Use α = 0.2 to compute the exponential smoothing
forecasts for the time series.
Week
Time Series
Value
Forecast
1
18
2
13
18
3
15
4
12
5
16
6
14
Compute MSE. (Round your answer to two decimal places.)
MSE =____
What is the forecast for week 7? (Round your answer to two
decimal places.)
____
(e)Use a...

Consider the following time series data.
Week
1
2
3
4
5
6
Value
20
12
16
11
18
14
Using the naïve method (most recent value) as the forecast for
the next week, compute the following measures of forecast
accuracy.
(a)
Mean absolute error
If required, round your answer to one decimal place.
(b)
Mean squared error
If required, round your answer to one decimal place.
(c)
Mean absolute percentage error
If required, round your intermediate calculations and final...

1. A plane curve has been parametrized with the following
vector-valued function, r(t) = (t + 2)i + (-2t2 + t + 1)j a.
Carefully make 2 sketches of the plane curve over the interval . (5
pts) b. Compute the velocity and acceleration vectors, v(t) and
a(t). (6 pts) c. On the 1st graph, sketch the position, velocity
and acceleration vectors at t=-1. (5 pts) d. Compute the unit
tangent and principal unit normal vectors, T and N at...

Consider the following time series data.
Week
1
2
3
4
5
6
Value
19
14
17
12
18
15
Using the average of all the historical data as a forecast for
the next period, compute the following measures of forecast
accuracy.
Round your answers to two decimal places.
a. Mean absolute error.
b. Mean squared error.
c. Mean absolute percentage error.
d. What is the forecast for week ?

Letr(t)=(4t2+1)i+2tjfor−2≤t≤2.
(a) (10 pts) Draw a sketch of the curve C determined by
r(t).
(b) (5 pts) Plot r(0) and label its endpoint P.
(c) (10 pts) Plot the vector tangent to C at P .
(d) (10 pts) Find the equation of the line tangent to C at P
(you may give this parametrically
or not).
(e) (5 pts) Find the curvature K at P .
(f) (5 pts) Find the radius of curvature ρ at P.
(g) (5...

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