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A small block of mass m is released on a triangular block of mass M. If at the same time a force
is applied to M, m remains rest relative to M. (Assuming all surfaces are frictionless)
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A、boring
B、demanding
C、nagging
D、impractical
The Dreadlock Deadlock
In the fall of 1993 Christopher Polk transferred from FedEx's hub in Indianapolis to take over a delivery route in Flatbush District, Brooklyn, N.Y. But moving to the country's largest community of Caribbean and African immigrants only precipitated a far more profound journey. "I was becoming culturally aware of the history of the black people," says Polk, now 31, "and that gave me these spiritual questions." His answer came providentially, by way of a music video featuring Lord Jamai, who raps about the Rastafarian belief in the sanctity of dreadlocks —the cords of permanently interlocked strands first worn by African chiefs perhaps 6,000 years ago.
Now a practicing Rastafarian, Polk sports thick garlands that gently cascade onto his shoulders. "Your hair is your covenant," he says. "Once you grow your locks, it puts you on a path."
Unfortunately, that path was a collision course with Federal Express's grooming policy, which requires men to confine their dos to "a reasonable style". After years of deliberation, Polk's bosses gave him a choice: shear his locks or be transferred to a lower-paid job with no customer contact. He refused both options and was terminated in June 2000.
His tale is not unique. Although Rastafarians number about 5,000 nationally, today dreadlocks, twists or braids are at the height of fashion, nearly as common as Afros were 30 years ago. If Afros symbolized militancy, dreads signal a more spiritual self-declaration, a figurative locking with African ancestors. As Stanford professor Kennell Jackson, who teaches a course called "African Coiffures and Their New World Legacies" puts it, "There's a divinity to these locks."
Divine or not, some employers consider them unacceptably outré. Six other New York-area FedEx employees have lost their jobs because of dreadlocks. They have sued, alleging religious discrimination; the U.S. Equal Employment Opportunity Commission and New York's attorney general have also charged FedEx with violating religious protections in the Civil Rights Act.
The dreadlock deadlock may be easing. FedEx altered its policy slightly a few weeks ago: in the future, observant employees who seek a waiver may wear their locks tucked under uniform. hats, says a company spokeswoman. The concession isn't enough to settle the lawsuits yet. The EEOC also wants reinstatement for the fired drivers, says trial attorney Michael Ranis. He's optimistic. Some new styles, he knows, grow more appealing over time.
A MOOC (massive open online course) is an online course aimed at unlimited participation and open access via the web. MOOCs are a recent development in distance education and have now become a surging trend in higher education. These classes are aimed at expanding a university's reach from thousands of tuition-paying students who live in town, to millions of students around the world. In addition to traditional course materials, MOOCs provide interactive user forums to support interactions between students and professors. MOOCs can encourage communication among participants who bring a variety of viewpoints, knowledge, and skills to the course; inspire people to "try on" subjects that they wouldn't otherwise pursue or even try on education itself; provide multiple ways to engage with course material, encouraging multimodal learning that can address the needs of learners with a variety of learning styles; and inspire better teaching and use of technologies for face-to-face courses.
Please proofread the following Swift Credit with the given terms & conditions in a sale confirmation, and list all requests for amendment. (1) Swift Credit FROM: DBS BANK LTD, TOKYO BRANCH TO: BANK OF CHINA SHANGHAI BRANCH, CHINA 27: SEQUENCE OF TOTAL 1/1 40A: FORM OF DOCUMENTARY CREDIT IRREVOCABLE 20: DOCUMENTARY CREDIT NUMBER CRE1437 3lC: DATE OF ISSUE 181101 40E: APPLICABLE RULES UCP 600 31D: DATE AND PLACE OF EXPIRY 190131 JAPAN 50: APPLICANT EASTERN TRADING COMPANY OSAKA, JAPAN 59: BENEFICIARY SHANGGHAI DONGHAI TEXTILES TRADING CORP. SHANGHAI, CHINA 32B: CURRENCY CODE, AMOUNT HKD 21 600.00 41A: AVAILABLE WITH.. BY.. ANY BANK BY NEGOTIATION 42A: DRAWEE DBS BANK LTD, TOKYO BRANCH 42C: DRAFTS AT 30 DAYS AFTER SIGHT 43P: PARTIAL SHIPMENTS ALLOWED 44E: PORT OF LOADING/AIRPORT OF DEPARTURE SHANGHAI, CHINA 44F: PORT OF DISCHARGE/AIRPORT OF DESTINATION YOKOHAMA, JAPAN 44C: LATEST DATE OF SHIPMENT 190131 45A: DESCRIPTION OF GOODS AND/OR SERVICES + 67,200 YARDS OF DOVE PRINTED SHIRTING AS PER CONTRACT NO. PS1234 + AT HKD 3 PER YARD CFRC2 KOBE/OSAKA, JAPAN 46A: DOCUMENTS REQUIRED + SIGNED COMMERCIAL INVOICE IN TRIPLICATE + SIGNED DETAILED PACKING LIST IN TRIPLICATE + FULL SET OF CLEAN SHIPPED ON BOARD BILLS OF LADING MADE OUT TO ORDER QUOTING CRE1437, MARKED FREIGHT COLLECT + ONE ORIGINAL MARINE INSURANCE POLICY FOR 130 PCT OF THE TOTAL INVOICE VALUE COVERING FPA AS PER OCEAN MARINE CARGO CLAUSES OF PICC, DATED JANUARY 1, 1981 71B: CHARGES ALL CHARGES AND COMMISSIONS OUTSIDE JAPAN ARE FOR BENEFICIARY'S ACCOUNT (2) Major terms and conditions in the related S/C. 卖 方： 上海东海纺织品贸易公司 SHANGGHAI DONGHAI TEXTILES TRADING CORP. 买 方： 东方贸易公司 EASTERN TRADING COMPANY 商品名称：鸽牌印花细布 DOVE PRINTED SHIRTING 规 格： 30×36, 72×69, 35×42码 数 量： 67,200码 单 价： 每码3.00港元CFR横滨（YOKOHAMA），含佣金2％ 总 金 额： 201,600港元 装 运 期： 2019年1月31号前中国港口至日本横滨，允许分批装运 付款条件： 凭不可撤销、见票后30天付款的远期信用证付款，于装运期前一个月开到卖方并于上述装运期后15天内在中国议付有效。 合同号码： PS1234
A、The linear momentum of the cart is conserved.
B、The linear momentum of the particle is conserved.
C、The linear momentum of the cart and linear momentum of the particle are both conserved.
D、The linear momentum of the cart and linear momentum of the particle are both not conserved.
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