题干

(1)随着经济的发展,汽车已成为人们常用的交通工具.一辆使用汽油为燃料的小汽车,在路面水平的高速公路上匀速行驶.如表是当小汽车以100km/h的速度行驶时的部分参数及相关数据.

发动机功率/W

18750

百公里油耗/L

8

汽油的热值/(J•L1

3.375×107

①匀速行驶10km消耗了 ____  L汽油;②消耗的燃油完全燃烧放出的热量为 ____ J;

③此时发动机的效率是 ____  .

(2)如图所示,容器中间用隔板等分成左右两部分,隔板下部有一10cm2的圆孔橡皮膜封闭,橡皮膜两侧压强不同时其形状发生改变.图甲所示在两侧装入深度相同的两种液体,橡皮膜发生形变,可以得出结论:在深度相同时,液体压强跟____ 有关;图乙所示,在容器右侧装水,左侧装入密度为1.4×103kg/m3的某种液体,橡皮膜刚好不发生形变,若橡皮膜所受平均压强是橡皮膜上A点所受压强,则此时橡皮膜受到水的压力是 ____  N,A点在左侧液体中的深度h为 ____  cm.(g=10N/kg)

上一题 下一题 0.0难度 选择题 更新时间:2019-06-09 10:08:45

答案(点此获取答案解析)

0.8,2.7×107,25%,液体密度,0.7,5

同类题1

阅读理解

    Does the future of filmmaking lie in virtual reality (VR) films?

   An ambitious team led by Yale senior Celine Tien might hold the answer to that question.

    Tien produced,directed and acted in Pippa's Pan,which she says is “one of the world's first live-action VR films.”The film,which was completed in April,mixes live action with VR sections.Some of the characters were created via animation(动画)and other techniques that distinguish the film from 360° VR videos like the ones frequently seen on YouTube.

    “360° VR videos are stagnant,which means you don't move with them and see a 360° view of whatever they're filming.”Tien explained.“What we're doing is immersive(沉浸式的)VR.When you put on the goggles (a kind of special glasses) you can physic.ally walk around in the space,pick up objects and engage with the environment.It's a huge difference.”

    The immersive VR film experience is different for everyone who interacts with the medium,but that doesn't mean the film's ending will change for each viewer.

    The film stars two Chinese-speaking actors."It's a love story about a woman suffering from Alzheimer's disease who is trying to bring back memories of her husband,"Tien said.

    The film has already been recognized by the VR industry.After handing in a short demo to the AT&T Developer Summit Conference,Tien and her team were invited to Las Vegas in January,where they came in third place.

    If you're dying to see the film already,your choices area bit limited: Pippa's Pan can't be seen in movie theaters unless they happen to have VR goggles available.According to Tien,many theaters in China will soon have the ability,which makes sense considering China is the film's target market.

    Pippa's Pan will be released in three languages: Chinese,English and Korean.“It can get spread in different ways: at film festivals with VR set ups and through HTC or Oculus headset stores,”Tien says.“If you have VR goggles you can download it and experience it yourself.We will also cooperate with movie theaters that have VR set ups.”