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0
like
0
dislike
1
answer
asked
4 hours
ago
in
Physics

2
views
A ray of light strikes from a medium $(n = 1.67)$ on a surface of separation with the air $(n = 1)$. It calculates the limit or critical angle.
refraction
light
incidence
criticalangle
angle
laser
beam
0
like
0
dislike
1
answer
asked
4 hours
ago
in
Physics

2
views
What must be the angle of incidence for there to be total internal reflection of a ray going from water $(n_w = 1.3)$ to glass $( n_g = 1.52)$?
criticalangle
incidence
refraction
light
angle
laser
beam
0
like
0
dislike
1
answer
asked
5 hours
ago
in
Physics

2
views
What is the formula for predicting the critical angle (angle of incidence that provides an angle of refraction of 90degrees)?
refraction
angle
criticalangle
incidence
beam
laser
internal
0
like
0
dislike
1
answer
asked
1 day
ago
in
Physics

5
views
When comparing systematic and random errors, the following pairs of properties of errors in an experimental measurement may be contrasted:
systematic
random
error
measure
experimental
magnitude
0
like
0
dislike
1
answer
asked
1 day
ago
in
Physics

5
views
In a simple electrical circuit, the current in a resistor is measured as $(2.50 \pm 0.05) mA$. The resistor is marked as having a value of $4.7\Omega \pm 2\%$
electrical
circuit
resistor
power
value
result
0
like
0
dislike
1
answer
asked
1 day
ago
in
Physics

5
views
An Olympic athlete of mass $80kg$ competes in a race. What is the best estimate of his kinetic energy during the race?
olympic
athlete
mass
race
estimate
kinetic
energy
0
like
0
dislike
1
answer
asked
1 day
ago
in
Physics

5
views
A metal sphere of radius $r$ is dropped into a tank of water. As it sinks at speed $v$, it experiences a drag force $F$ given by $F=krv$, where $k$ is a constant. What are the SI units of $k$?
metal
sphere
tank
water
speed
force
units
0
like
0
dislike
1
answer
asked
1 day
ago
in
Physics

6
views
A student makes measurements from which she calculates the speed of sound as $327.66 ms^{1}$. She estimates that her result is accurate to $\pm 3\%$.
speed
sound
estimate
accuracy
result
0
like
0
dislike
1
answer
asked
1 day
ago
in
Physics

5
views
A micrometer reading to $0.01mm$, gives the following results when used to measure the diameter $d$ of a uniform wire
micrometer
reading
results
diameter
wire
1
like
0
dislike
1
answer
asked
2 days
ago
in
Mathematics

5
views
What is the value of $f(n)$ when $n=16$?
function
domain
range
cases
evaluate
1
like
0
dislike
1
answer
asked
2 days
ago
in
Mathematics

8
views
How do you prove that every wellordered set is isomorphic to a unique ordinal number?
prove
wellordered
set
isomorphic
unique
ordinal
number
1
like
0
dislike
1
answer
asked
2 days
ago
in
Mathematics

6
views
If I divide, add, subtract, or multiply a number with a repeating decimal is the answer always going to have a repeating decimal?
add
multiply
divide
number
subtract
result
palindrome
0
like
0
dislike
1
answer
asked
2 days
ago
in
Mathematics

7
views
Given: Right Triangle PQR , with acute angles P and R. Which statement is NOT true?
triangle
length
angles
approximation
data
dag
experiments
0
like
0
dislike
0
answers
asked
2 days
ago
in
Mathematics

6
views
Evaluate $\lim_{x \rightarrow \infty}\dfrac{1}{2x^3}$
calculus
function
exponents
limits
logarithms
logs
calculate
1
like
0
dislike
0
answers
asked
2 days
ago
in
Mathematics

5
views
Find the two $x$ values at which the tangent line to the curve $y=\dfrac{x+3}{x+2}$ is perpendicular to the line $y=x$
function
calculate
calculus
theorem
limits
equation
0
like
0
dislike
0
answers
asked
2 days
ago
in
Mathematics

5
views
An ant colony is multiplying inside a plate. The number of ants increases at a rate of $10e^t$ per hour. Find the net increment of ant population after 24hrs?
increases
rate
hour
increment
population
0
like
0
dislike
0
answers
asked
2 days
ago
in
Physics

6
views
The password is 3 digits long, and each digit could be a number between 0 and 5. The probability of guessing the password on the first try?
probability
permutations
combinations
combinatorics
0
like
0
dislike
0
answers
asked
2 days
ago
in
Physics

5
views
Find the percent of change from 128 to 112?
average
rate
formula
change
of
calculate
percentage
0
like
0
dislike
0
answers
asked
2 days
ago
in
Physics

5
views
How many Kilowatt hours are used by a 250W bulb burning for 8 Hours?
kilowatt
hours
bulb
burning
0
like
0
dislike
0
answers
asked
2 days
ago
in
Mathematics

5
views
Determine the derivative of $ y=\left(\dfrac{x^23}{x^2+3}\right)^4$ by using two different methods
determine
derivative
different
methods
differentiation
0
like
0
dislike
0
answers
asked
2 days
ago
in
Mathematics

5
views
Scores on BMCC fall 2017 MAT150.5 department final exam form a normal distribution with a mean of 70 and a standard deviation of 8. What percent of the population has the following?
calculate
standarddeviation
distribution
normal
variance
data
average
0
like
0
dislike
0
answers
asked
2 days
ago
in
Mathematics

5
views
Find the projection of $u = <3,12>$ onto $v = <9,2>$
vectors
dot
product
cross
orthogonal
scalar
projection
0
like
0
dislike
0
answers
asked
2 days
ago
in
Mathematics

5
views
Find the dot product of $u = <5,6,2>$ and $v = <3,10,8>$. Are $u$ and $v$ orthogonal?
vectors
scalar
dot
product
cross
orthogonal
0
like
0
dislike
0
answers
asked
2 days
ago
in
Mathematics

5
views
Suppose you have a function to which you apply L’Hospital’s rule and the result is still in the form 0/0 or infin/infin what can you do?
function
hospital
rule
form
infin
0
like
0
dislike
0
answers
asked
2 days
ago
in
Mathematics

5
views
A cube has an edge length of 18m. What is its volume, in cubic m?
area
square
rectangle
side
ratio
proportion
math
0
like
0
dislike
0
answers
asked
2 days
ago
in
Mathematics

5
views
how to find the area of a circle with circumference of 12cm?
area
circle
radius
diameter
circumference
0
like
0
dislike
0
answers
asked
2 days
ago
in
Mathematics

5
views
Solve the equation $\sin{(x+3)}=\sin{x}$, $0 \leq x \leq 2\pi$ to 4 decimal places. What is the product of the two solutions?
equation
solve
cosine
sine
calculus
identity
trigonometry
0
like
0
dislike
0
answers
asked
2 days
ago
in
Mathematics

5
views
Find the value of $A$ using the formula $A = Pe^{rt}$ given the following values of $P, r$ and $t$. Round to the nearest hundredth.
graph
calculate
equation
gradient
coordinates
theorem
midpoint
0
like
0
dislike
0
answers
asked
2 days
ago
in
Mathematics

5
views
Round 475,695 to the nearest thousand
round
nearest
thousand
off
numbers
0
like
0
dislike
0
answers
asked
2 days
ago
in
Mathematics

5
views
Solve the trigonometric equation $2\cos{(\dfrac{3}{10}x)}  3\sin{(\dfrac{1}{2}x)}=0$
solve
trigonometric
equation
cosine
sine
tan
0
like
0
dislike
1
answer
asked
2 days
ago
in
Mathematics

6
views
What percent of $897.77$ is $84.95$?
fraction
decimals
convert
percent
0
like
0
dislike
1
answer
asked
2 days
ago
in
Mathematics

6
views
If 2 => 6, 3 =>12, 4 => 20, 5 => 30, 6 => 42 then 9 => ?
numbers
sequence
calculate
sum
complete
pattern
sequences
0
like
0
dislike
1
answer
asked
2 days
ago
in
Library & Clubs

9
views
A classroom wall is 750 cm long. Calculate how many tables, each 120 cm long,will fit along the wall and hence, determine how much space will be left over.
classroom
wall
calculate
tables
space
1
like
0
dislike
1
answer
asked
2 days
ago
in
Digital Marketing

5
views
Why is Yahoo Answers shutting down?
platform
qna
yahoo
answers
shutting
down
questions
1
like
0
dislike
1
answer
asked
Apr 11
in
General Knowledge

7
views
What are the common typos when people search for MathsGee on the search engines?
mathsgee
students
education
search
engines
typos
tool
0
like
0
dislike
1
answer
asked
Apr 10
in
Data Science

8
views
Is online experimentation necessarily better than instinctdriven/informed decision making for online businesses?
online
experimentation
instinctdriven
informed
decision
making
0
like
0
dislike
1
answer
asked
Apr 10
in
EdTech

8
views
How can institutions leverage digital courseware to gain actionable data to help students?
institutions
leverage
digital
courseware
actionable
data
students
2
like
0
dislike
1
answer
asked
Apr 10
in
Data Science

40
views
How is Facebook using Bayesian Optimization with BoTorch?
bayesian
optimization
network
assumption
inference
0
like
0
dislike
1
answer
asked
Apr 10
in
Digital Marketing

5
views
Does changing dates on my website's existing pages improve my search engine rankings?
dates
seo
marketing
website
search
engine
rankings
1
like
0
dislike
1
answer
asked
Apr 9
in
Mathematics

8
views
Jack and Thembile live 6 473 m apart. Convert this distance to km.
question
help
answer
math
distance
cost
discount
0
like
0
dislike
1
answer
asked
Apr 9
in
Mathematics

7
views
In Sweden a daytime temperature of $1^{\circ}C$ can drop by $16$ degrees during the night. What will the temperature be then?
temperature
thermometer
calculate
gas
equation
ideal
nitrogen
0
like
0
dislike
1
answer
asked
Apr 9
in
Mathematics

8
views
When do we use negative numbers in life?
use
negative
numbers
directed
numberline
life
1
like
0
dislike
1
answer
asked
Apr 8
in
Mathematics

8
views
How do I know if two straight lines are parallel?
lines
parallel
equations
line
finctions
0
like
0
dislike
1
answer
asked
Apr 8
in
Entrepreneurship

7
views
When did the Pick n Pay franchise business start?
picknpay
franchise
business
start
0
like
0
dislike
1
answer
asked
Apr 8
in
Mathematics

8
views
If B is 4, C is 9 and D is 16. Find the sum A+C+E?
algebra
number
real
equality
inequalities
mutuallyexclusive
events
0
like
0
dislike
1
answer
asked
Apr 7
in
Mathematics

6
views
A store ordered 750 candles a total wholesale cost of $7910.20. The soy candles cost \$12.17 each and the specialty candles cost \$9.58 each. How many of each were bought?
store
ordered
wholesale
cost
candles
bought
0
like
0
dislike
1
answer
asked
Apr 6
in
Mathematics

8
views
Solve the exponential equation for $x: e^{x  4} e^{2x + 9} = 14$
equation
solve
theorem
algebra
calculate
calculus
exponents
0
like
0
dislike
1
answer
asked
Apr 6
in
Data Science

44
views
Is there a way to grasp the correct causal structure on the basis of observation and without presupposing dispensable causal knowledge?
causal
structure
observation
knowledge
parameters
assumptions
flagpole
1
like
0
dislike
1
answer
asked
Apr 5
in
Data Science

7
views
How can I compute counterfactuals, given a parametric model for the structural equation for the outcome?
causal
model
structural
equation
npsem
system
nonparametric
0
like
0
dislike
0
answers
asked
Apr 5
in
Data Science

5
views
So counterfactual is considered a disjoint set of CATE, rather than a subset?
inference
learning
machine
bayesian
dataanalysis
statistical
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