棒球的英文单词是什么

Action is equal to reaction acts in a contrary direction.
when bat beats the baseball, the acting force from bat and reacting force from the baseball, and the two force act to each other, but in a contrary direction.

Frank is my friend.He has a great sports collection.He has 7 basketballs,6 baseballs,3 volleyballs and 4 soccer balls.He has 8 tennis rackets and 2 ping-pong bats.He plays sports every day.He also watches soccer matches on TV.
这是初一英语,是很简单的……

Does he watch baseball on TV?

The baseball is under the sofa

She joined basbell club of school.

He was recruited by the campus baseball club.
参加活动,可以用take part in,anticipate等,参加俱乐部,是指被招募进一个机构,一般用recruit.

politics .physics.chemistry .biology .nature .science basketboll .
baseball .badminton .artclub.chinese chess club.cinemaclub.

棒球是相对于太阳系中心而言静止,对于地球有速度,大小等于地球公转线速度大小.由于是正碰,可直接用参考系变换得到棒球相对于地球的速度大小为29.78km/s,所以棒球自身的动能Ek=0.5mv²=88684840J.对棒球来说地球质量很大（地球质量约为棒球的3*10^25倍）,因此地球在碰撞前后速度改变忽略,即认为动能不改变.那么如果忽略大气层对棒球的阻力作用,棒球会和地球完全非弹性碰撞,动能完全损失,即88684840J的动能转化为热能.
但这里忽略了地球引力和大气层的阻力作用.如果考虑引力,那么棒球相对地球具有引力势能（地球公转轨道半径r约为1.5*10^8km,那么棒球从初始位置到当碰撞后引力势能转化为机械能的量最大为ΔEp=GMm/2r=266800J）,实际能量会增大（由以上计算可知基本上可以忽略）；考虑到大气层的作用,棒球在碰到地表之前就会烧完,根本碰不到地球,问题无法解答.

你把速度分解 然后分别求水平和竖直的加速度 再把加速度合成就是合加速度的方向 也是棒对球的力的方向 然后用球的质量乘以加速度就是力的大小
打击后水平分速度和竖直分速度都是是25根号2 约等于35.36m/s
竖直方向速度改变量是35.36 水平是40+35.36=75.36m/s
作用时间是0.02s 所以加速度竖直是35.36/0.02=1768m/s² 水平是3768m/s²
水平力和竖直力分别是 1768*0.15=265N 3768*0.15=565N
合力为624N 方向为与水平夹角arctan565/265≈65°

1作用力与反作用力,F1=F2,
用到牛顿第三定律.
2物体斜抛,用到速度的合成和分解,竖直方向上和自由落体运动相同,斜抛方向上减速.
3动能定理

1.He is not Jack.Is he Jack?
2.I am not Helen.Am I Helen?
3.This is not my friend,Jane.Is this my friend,Jane?
4.These are not my little brothers.Are these my little brothers?
5.I don't have a baseball.Do I have a baseball?
6.She doesn't have a tennis ball.Does she have a tennis ball?
7.He doesn't have a football.Does he have a football?
8.They don't have a football.Do they have a football?

1.这是什么?它们是一些字典.
What are they?They are some dictionaries.
2.她是你的朋友吗?不,她不是.
Is she your friend?No,she isn't.
3.我的棒球在哪?它在床底下.
Where is my baseball?It's under the bed.
4.在书桌上有一张全家福照片.（There be 结构）
There is a family photo on the desk.
5.见到你很高兴.
How are you?Nice to meet you.

They have basketballs. 他们有篮球.
They have footballs. 他们有足球.
They have volleyballs. 他们有排球.
They have rugbys. 他们有橄榄球.
They have baseballs. 他们有棒球.
They have golfs. 他们有高尔夫球.
希望对你有帮助

Is the baseball on the couch?

1）球的竖直击出速度V1=Vsin37°=38m/s×0.6=22.8m/s竖直上升的时间t1=V1/g=22.8m/s÷10m/s^2=2.28s球飞行的时间t=2t1=4.56s2）上升的最大高度H=V1^2/2g=(22.8m/s)^2/(2×10m/s^2)=25.992m3）水平击出速度V2=Vcos37°=38m/s×0.8=30.4m射程S=V2t=30.4m/s×4.56s=138.634m

Does Bob have a baseball

"She attended the school baseball club."

从VOA special English 上边找的
The origins of baseball are centered in the northeastern United States. The first official game under modern rules was played at the Elysian Fields in Hoboken, New Jersey in 1846. The man who wrote the rules was Alexander Cartwright, who was part of the first official team, the New York Knickerbockers.

Alexander Cartwright is credited with writing the first rules for the sport in 1846
During the Civil War in the 1860s, baseball became an increasingly popular sport among Union soldiers. Frank Ceresi is a baseball historian. "This [photograph] is from the Civil War period and this takes place in the 37th Massachusetts volunteer army from during the Civil War and if you can see it, they're playing a bat and ball game,” Ceresi said. “What they're doing is relaxing before the battle."

Baseball's popularity grew after the Civil War. It attracted donors who wanted to sponsor teams.
In 1869, the Cincinnati Red Stockings became the first fully professional team. From there, more amateur teams turned pro. This was the beginning of what is now Major League Baseball.
Today, baseball is enjoyed by many Americans for many reasons, says Ceresi.

Frank Ceresi, baseball historian

“If you think of the story, it's woven in our culture,” he said. “It hits on everything - civil rights, history, heroes, the great outdoors, competitions, all of those things are embodied in a game in our culture, and that's why it's so popular.”
Baseball impacted the social fabric of America in the mid-20th century. At a time when much of the United States was heavily segregated, Jackie Robinson broke the color barrier in 1947, playing for the Brooklyn Dodgers as the first African-American in the major leagues.

Many others followed, but the process moved slowly, with the final team - the Boston Red Sox - only integrating in 1959.

Bob Dupuy

Bob Dupuy, President of Major League Baseball, says the next wave of players was from outside the country.

“Now 23 percent of our major league roaster are players that were born outside the United States,” he said. “There are a number of Asian players, some European players, some Australian players, but the majority are Latinos”

Though there's more diversity among the players, Ceresi said, “there is not full equality in management or in ownership of the game.”
While several countries enjoy thriving baseball leagues, the international record for baseball is mixed. This year's inaugural World Baseball Classic, which included Japan, China, South Korea, Australia and several Caribbean countries, was viewed by many as a success. However, the International Olympic Committee announced last year that it was dropping baseball from its list of sports after the 2008 Summer Games

质量=0.07kg,速度v=5m∕s,力F=45N,由公式mv=Ft可知,需要7∕900秒才能停下.

竖直分速度：vy=vosin30°=45*1/2=22.5m/s
升高的高度：h=vy^2/(2g)=22.5^2/(2*10)=25.3125m
所求动能为：Ek=1/2mvo^2-mgh=1/2*0.15*45^2-0.15*10*25.3125=113.9J

棒球 baseball
捉迷藏 hide and see

1. Is; baseball on
2. on weekends
3. go to movies with
4. need; for sports
5. to know about

方至O轴X处与球有一短暂的碰撞,设其打击力为F,为使O处不出现附加反作用力,试求满足这个要求的X值,其为球棒的打击中心.

1.Where are some of her baseballs?They are under the chair.
2.Are some of your plants on the desk?No,they aren't.They are on the bookcase.
3.Please take the notebook to your brother.
4.Could you bring my watch here?

Is the baseball on the sofa?

这个句子不能按字面意思直译
我看了很多外国的网站,我帮你总结一下它的含义..
"it's the bottom of the ninth with the home team behind," meaning "there isn't much time to turn things around here."
it's the bottom of the ninth 的意思差不多就是"我们没时间.."的意思
It's the bottom of the ninth and there are two people out
现在已经是关键(最后)时刻了,已经有2人出局了..
它的意思应该很明了了吧..

你如果是初三的,并且物理不太差就会明白了,不难的
“轮轴”是由一个大轮和一个轴组成的,这也可以运用F1L1=F2L2,大轮用小力,轴用大力时两端平衡（由于你跟你朋友差不多大,力气也几乎一样大,所以握轴的那端细的F2比你的F1小当然会吃亏咯） 明白了吗?

祝你学习进步哦

她收藏了大量的棒球棍.
She has a great collection of baseball bats.

i bought a book yesterday
i went to xiamen last week
i watched a baseball match last night

They want to join the baseball clu

Lost：baseball
My lost baseball.
My name is Keisey.
Please call me at 7055398
遗失：棒球我失去了棒球.我的名字是keisey.请打电话给我7055398
祝你学习顺利

1去击败对手
2给我份比赛预测（相当于NBA比赛前提供的取胜之匙）
3来个快球
4本垒打
5谁将要出场?

1occupation或High jump 2long jump 3Hurdle race 4baseball 5volleyball 6bicycle 7羽毛球 8划艇 9帆船 10柔道 11体育运动 12跳水 13举重 14艺术体操15水球

ask Alen for your baseball

It is not difficult to understand that housing has become a popular subject of conversation these days
He is more curious about than fond of baseball

Who lost a baseball and a football after sports lessson please phone me.

Found
Is this your baseball
Please call John at 676-6235 .

Can you help me 。find the baseball?

at

选c,名词作修辞成分时候除了特殊情况复数不加S
完整句：
She has two baseball bats.

Do you have a baseball?

球棒是用来打棒球的.

1.P=mV=0.2*（5+10）=3kg m∕s 2.p=Ft得F=3∕0.02=150N

These are my baseballs

aseball 这是棒球的意思

My father has a few collections of baseball.

Jordar the basketball very well.he has played well
Jordar的篮球打得很好.他的棒球也打得很好