You look at yourself in a shiny 9.6-cm-diameter Christmas tree
ball. If your face is 26.0...
You look at yourself in a shiny 9.6-cm-diameter Christmas tree
ball. If your face is 26.0 cm away from the ball's front surface,
where is your image? Follow the sign conventions.
A youngster is holding a ball with a diameter of 5.60 cm and
average density of 0.0837 g/cm3 under water. Determine
the force (in N) needed to hold it completely submerged.
magnitude N
direction ---Select--- upward downward
The mean diameter of a ball bearing produced by a certain
manufacturer is 0.80 cm with a standard deviation of 0.03 cm. A
sample of 36 ball bearings is randomly selected from a production
run. Suppose the diameter is normally distributed.
c. What is the probability that a randomly selected ball bearing
will have a diameter of less than 0.798 cm?
c.
What is the probability that a randomly selected ball bearing will
have a diameter of less than 0.798...
Picture yourself at the end of your career as a successful CPA.
What will that look like? What will your history of accounting jobs
have been? Will it look like the accounting job of the early
2000s?
A spherical steel ball bearing has a diameter of 2.540 cm at
29.00°C. (Assume the coefficient of linear expansion for steel is
11 ✕ 10−6 (°C)−1. )
(a) What is its diameter when its temperature is raised to
96.0°C? (Give your answer to at least four significant figures.)
cm
(b) What temperature change is required to increase its volume
by 0.800%?
As a Christmas tree farmer, you want to know what seed type is
the fastest growing. You plant 14 seeds and wait three years. After
three years of growth, the 14 seeds have an average height of
4.24ft and a standard deviation of 0.404ft. The tallest tree has is
4.79ft tall; (a) what is the probability that is random chance?
Assume the data follows a normal distribution. (b) Should you use a
t-score (t distribution) or a z-score (normal distribution)?
You take your trusty 120 turn solenoid, with 20 cm diameter and
spin it at a rate of 10 times per second in a magnetic field that
you have constructed with two gigantic neodymium magnets, creating
a uniform magnetic field. You are spinning the solenoid so that its
rotation axis is perpendicular to the magnetic field direction.
a) What field strength do you need to create a peak emf voltage
of 150 V? (Hint: use flux as a function of...
Two 10-cm-diameter charged rings
face each other, 19 cm apart. The left ring is charged to -30 nC
and the right ring is charged to +30 nC .
Part A
What is the magnitude of the electric field
E⃗ at the midpoint between the two rings?
Express your answer to two significant figures and include the
appropriate units.
Part B
What is the direction of the electric field
E⃗ at the midpoint between the two rings?
What is the direction of the...
Two 10-cm-diameter charged disks face each other, 23 cm apart.
The left disk is charged to - 50 nC and the right disk is charged
to + 50 nC .
A)
What is the electric field E⃗ , both magnitude and direction, at
the midpoint between the two disks?
B)
To the left disk.
To the right disk.
Parallel to the plane of the disks.
C)What is the force F⃗ on a -3.0 nC charge placed at
the midpoint?
A 10-cm diameter solid metal ball falls through the air at its
terminal velocity of 39.3 m/s.
a) What would the new terminal velocity be if the mass of the
ball were doubled, while the diameter and all other physical
properties of the ball remained unchanged.
b) What would the new terminal velocity be if the diameter of
the ball were doubled, while the mass and all other physical
properties of the ball remained the same as the original?
c)...