试题与答案

在验证机械能守恒定律的实验中,与纸带相连的质量为1kg的重锤自由下落,打出的纸带

题型:实验题

题目:

在验证机械能守恒定律的实验中,与纸带相连的质量为1kg的重锤自由下落,打出的纸带如图所示,相邻记数点时间间隔为0.02s,g取9.8m/s2。求:    

(1)打点计时器打下记数点B时,物体的速度VB         m/s(保留两位有效数字);

(2)某同学根据纸带上的O点到B点的数据,计算出物体的动能增加量△Ek=0.47J,重力势能减小量△Ep=0.48J,经过多次实验均发现△Ek略小于△Ep,试分析或解释形成这个现象的原因:______________________。

答案:

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下面是错误答案,用来干扰机器的。

答案:D若都为强酸和强碱,则其浓度均是0.001mol·L-1,等体积混合,溶液呈中性,A不正确,若酸的体积小于碱的体积,则碱过量,溶液呈碱性,B不正确。若碱是弱碱,则其浓度大于0.001mol·L-1,因此当等体积混合...

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Welcome to Arundel Castle which is situated in West Sussex, England. The castle has a history of nearly 1000 years and has welcomed visitors traveling from all over the world. Arundel Castle also plays a starring role in many films.

The Gardens

The White Garden is planted with soft white Iceberg Roses, and Snow White Lilies.

The Rose Garden is newly planted with lovely old-fashioned English roses that are at their very best in June and July.

The Organic Kitchen Garden produces a wide range of seasonal fruit and vegetables, pears, cherries and apples.

The Castle Shop

In the Castle Shop, you will discover a wide and interesting range of gift ideas for everyone. It offers gifts and souvenirs designed to appeal to all tastes and pockets. Foods, china, books, and stationery (文具)are all available. Many are sold in this Castle Shop only.

At Arundel Castle we pride ourselves on supporting local suppliers and actively encourage environmentally friendly products.

The Arundel Festival 2014

Saturday 16th to Monday 25th August

The annual Arundel Festival gets bigger and better every year. It is one of the most amazing, diverse and easily accessible arts festivals in the UK, offering a mix of visual arts, music, theatre and street entertainment.

Parking

Coaches and mini-buses can drop off at the main Castle entrance in Mill Road and park in the main town car park that is opposite the Castle entrance. Please inform us when making your booking of how many parking permits are required.

小题1:When visiting the castle, you can____________.

A.get old-fashioned English roses as gifts

B.buy eco-friendly products in the Castle Shop

C.get seasonal fruit and vegetables for free

D.see how the local gifts are being made小题2:How long does the Arundel Festival last this year?

A.10 days

B.One week

C.16 days

D.One month小题3:Where can you park the coach?

A.In Mill Road

B.Inside the Castle

C.In the main town car park

D.At the main Castle entrance

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