Q=m.c.Δt
⇒m=Q/Δt.c
Đáp án:
Ta có công thức tính nhiệt lượng là:
\[Q = mc\Delta t\]
Từ đó ta tính khối lượng như sau:
\[m = \frac{Q}{{c\Delta t}}\]
1.Information technology...(change) over the past years due to user expectations. 2....(you/still plant) the trees if I join you at 3.30 this evening 3.If we ... (have) flying vehicles now,we could solve the problem of traffic jam 4.John J.Stone Parker ....(parent) his invention when he was 4 years old 5.The computer mouse....(invent) by Douglas Engelbart in 1964 6. They said that they.... (not be) to the art gallery for a long time. 7. I strongly believe there in 10 years' time... (be) huge changes in the way we live 8.The planet Mars ...(explore) remotely by spacecraft since the late 20th century. 9.The teacher told us that we ...(may) choose any subject that we ...(like) best. 10.When I called Jane at 4 o'clock yesterday evening, she said she (work) then. Chia động từ
1.nêu và so sánh được chiều dòng điện trong mạch theo quy ước với chiều dòng điện trong kim loại 2.giải thích C.1; C.2; C.3; C.4; C.5 trang 68
Viết bài tả cơn mưa thanh kiuuuu
1. The flights to London will (delay)…………………………… because of heavy rain. 2. This is the first time Hoa (meet)…………………………… Tim’s family. 3. What …… you (do)…… …… this time yesterday? - I (work)……………… on the computer. 4. The trees are (plant)…………………………… by his father. 5. we are really interested in (visit) …………………………… Ha Long Bay.
Trình bày các chính sách cai trị của phong kiến phương Bắc đối với nhân dân ta trong thời kỳ Bắc thuộc?
Read/difficult/your/it/writing/to/is
C. Make sentences using the words and phrases below 1. We/ seel that movies/ ten times. 2. I/ never/ be / Ha Long Bay. 3. you/ ever/ eat/ French food?..... 4. Robots / not/ take/ care/ our children/ future... 5. Although / we/ try/ best/ we/ not/ win/ the game/ last night. 6.Ann / might/ not / come/ party/ tonight/ because/ she/ busy 7. What/ he/ do / if/he/ want / save / electricity at home?. 8. The air/ not/ be/ so polluted/if/ people/ plant / more trees. 9. What/ you / do/ if/ you/ not/ pass/ this exam?.. 10. If/ the river / not / dirty/ there/ more / fish...
Tính tổng các số nguyên x thỏa mãn - 2017 ≤ x ≤ 2018
Give the correct from of the given words to complete the following sentences. 1. People can increase their life.......if they have a healthy diet. (EXPECT) 2. We shouldn't eat so many kinds of food at dinner because some kinds of foods are so .......,which make you uneasy . (NUTRITION) 3. Longevity is also linked with low levels of stress and........(ANXIOUS) 4. Mrs Lan is a .....,who gave me some advices on how to eat to be healthy. (DIET) 5. You can boost your health by lending a......life. (STRESS) 6. After giving birth to my daughter,I had to follow a special diet and joined a fitness class for.......people.(WEIGH) 7. He felt ill after the meal. He thought that he might have eaten something.......(POISON) 8.I fell over and my knee ở still a bit..... but it's slowly getting better.(PAIN) 9.The injection is quite......You won't even feel the needle going in.(PAIN) 10. The doctor said there was nothing he could do.My illness is.......(CURE)
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