Question: In a radioactivity experiment, a solid lead brick (with same measurements as a patio brick, 2.00 in. X 4.00 in. X 8.00 in, except with

In a radioactivity experiment, a solid lead brick (with same measurements as a patio brick, 2.00 in. X 4.00 in. X 8.00 in, except with a density that is 11.4 times that of water) is to be modified to hold a solid cylindrical piece of plastic. To accomplish this, the machinists are told to drill a cylindrical hole 2.0 cm in diameter through the center of the brick parallel to the longest side of the brick.
(a) What is the mass of lead (in kilograms) removed from the brick?
(b) What percentage of the original lead remains in the brick?
(c) Assuming the cylindrical hole is completely filled with plastic (with a density twice that of water), determine the overall (aver-age) density of the combination after fabrication is complete.

Step by Step Solution

★★★★★

3.48 Rating (165 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

a The volume of the drilled hole is V p r 2 L p 00100 m 2 800 in... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Document Format (1 attachment)

530-P-M-K (395).docx

120 KBs Word File

Students Have Also Explored These Related Mechanics Questions!

The pressure of 200 kg/s of water is to be increased by 4 MPa. The water enters through a 20 cm- diameter pipe and exits through a 12 - cm -diameter pipe. Calculate the minimum horsepower required to...

Why is the freezing of water considered to be a physical change?

Water flowing steadily through a 2 cm diameter pipe at 30 m/s goes through an expansion joint to flow through a 4 cm diameter pipe. Assuming the internal energy remains constant, determine (a) The...

following comment from LRN appears under the " The GoldPlus Proposal" heading: The semi-urban/rural market is over Rs.36,000 crores. Furthermore, the traditional plain gold jewelry segment is around...

In the radioactivity experiment, you will be using paper and aluminum sheet metal as absorbers for the radiation. Which material has the greater areal density (that is, mass per unit area (g/cm)),...

Experiment: [ y 3 2 P ] GTP , with or without ribosome, with or without IF 2 . In this experiment the gamma phosphate in GTP is labeled and radioactivity of the nucleotide is measured after the...

by APPLYING the Confidence Interval On his crusade to rid the post-apocalyptic world of the Living Dead, a young Zombie Slayernamed Hermis was interested in finding the secret as to how the recently...

Richard Boyce and Paul Howard-Flanders conducted an experiment that provided biochemical evidence that thymine dimers are removed from DNA by a DNA repair system. In their studies, bacterial DNA was...

answer a and b in a paragraph Learning Objectives for Popot, 1976: By the end of this activity, students will be able to - Describe how radioactivity can be used to measure biochemical phenomena. -...

...Thanks. 14-36. + Consider the data from the first replicate of Track cross-country skier (10 or 20 min), and delay between Exercise 14-14. the time of juice intake (0 or 20 min) and the beginning...

Subsidiary Company S has $1,000,000 of bonds outstanding at 8% annual interest. The bonds have 10 years to maturity. If the parent, Company P, is able to purchase the bonds at a price that reflects...

A company produces three products, A, B, and C. The sales volume for A is at least 50% of the total sales of all three products. However, the company cannot sell more than 75 units of A per day. The...

A street vendor outside a cricket ground is deciding whether to sell ice cream or hot dogs at todays game. The vendor believes that the profit made will depend on the weather. The payoff table is as...

Exercise C Compute the annual interest expense on the bonds in the previous exercise, assuming the bond discount is amortized using the straight-line method.

A bowling ball (mass 7.00 kg and radius 17.0 cm) is released so fast that it skids without rotating down the lane (at least for a while). Assume the ball skids to the right and the coefficient of...

In doing physical therapy for an injured knee joint, a person raises a 5.0-kg weighted boot as shown in Fig. 8.39. Compute the torque due to the boot for each position shown. 90 40 cm 60 30

An artist wishes to construct a birds and bees mobile, as shown in Fig. 8.40. If the mass of the bee on the lower left is 0.10 kg and each vertical support string has a length of 30 cm, what are the...

Dartis Company is considering investing in a specialized equipment costing $640,000. The equipment has a useful life of 5 years and a residual value of $67,000. Depreciation is calculated using the...

9. (17 marks) An investor has R100 and is considering investing in two different stocks. The prices of both stocks are assumed to follow the lognormal model with the parameters below. Stock A B...

The company pays interest at 12% on all borrowings. And pays a combined state and federal tax rate of 35%. Complete the forecast income statement and balance sheet. Begin by guessing at interest...