please check these for me
Which of the following is not a fluid?
a. carbon dioxide
b. hydrogen
c. seawater
d. wood
D
Which of the following statements is not correct?
a. a fluid flows
b. a fluid has a definite shape
c. molecules fo a fluid are free to move past each other
d. a fluid changes its shape easily
B
Which of the following statemnents is true according to Pascal's principle?
a. pressure in a fluid is greatest at the walls of the container holding the fluid
b. pressure in a fluid is greatest at the center of the fluid.
c. pressure in a fluid is the same throughout the fluid
d. pressure in a fluid is greatest at the top of the fluid.
C
Tides are caused by
a. differences in the gravitational force of the sun at different points on Earth.
b. differences in the gravitational force of the moon at different points on Earth
c. differences in Earth's gravitational field strenght at different points on Earth's surface
d. fluctuations in the gravitational attraction between Earth and moon.
i think either B or D
thanks for the help!
Which of the following statemnents is true according to Pascal's principle?
a. pressure in a fluid is greatest at the walls of the container holding the fluid
b. pressure in a fluid is greatest at the center of the fluid.
c. pressure in a fluid is the same throughout the fluid
d. pressure in a fluid is greatest at the top of the fluid.
C None of the answers are right. If c were right, the pressure at the bottom of the ocean would be the same as near the surface. Here is Pascal's principle: Pressure applied to an enclosed fluid is transmitted undiminished to every part of the fluid, as well as to the walls of the container.
It is too bad c did not say pressure applied...
Tides are caused by
a. differences in the gravitational force of the sun at different points on Earth.
b. differences in the gravitational force of the moon at different points on Earth
c. differences in Earth's gravitational field strenght at different points on Earth's surface
d. fluctuations in the gravitational attraction between Earth and moon.
i think either B or D
B. The gravitationional attraction between Earth and Moon does not fluctuate measureable.
so what answer do you think i should pick for the Pascal's Principle one?
C is the closest to being correct in the pressure question. Pressure variations due to depth are usually small in hydraulic systems, compared to applied pressures. However, strictly speaking, all answers are wrong, as BobPursley has already said.
The sun also has a very strong effect on tides; it is about 1/3 of the effect of the moon. It is the reason you always have higher and lower tides when the moon is full or new
You're welcome! Here's how you can check the answers:
1. Which of the following is not a fluid?
- To determine this, you can review the characteristics of fluids. Fluids are substances that flow and have the ability to change their shape. They are typically in a liquid or gas state. From the options given, you can identify that wood is not a fluid because it is solid, not capable of flowing or changing shape. Therefore, the correct answer is D.
2. Which of the following statements is not correct?
- To identify which statement is not correct, you need to assess the properties of fluids. Fluids flow, have the ability to change shape easily, and their molecules can move past each other. The only statement that does not align with these properties is "a fluid has a definite shape" which is statement B.
3. Which of the following statements is true according to Pascal's principle?
- Pascal's principle states that pressure in a fluid is transmitted equally in all directions. This implies that pressure in a fluid is the same throughout the fluid, making statement C true.
4. Tides are caused by...
- Tides are primarily influenced by the gravitational forces between the Earth, the moon, and the sun. The moon has a greater gravitational effect due to its proximity to Earth, so the correct answer is B.
Please note that I can only check the answers provided based on the information given, and there might be additional factors or context that could affect the correctness of the answers.