physics

posted by .

is the following statements true or false + write a correct version of each false sentance below:

1. usually, the cooler a liquid or gas is, the denser it is.

2. if you only want a small volume of hot water, you should place the immersion heater near the bottom of the hot water tank.

3. heat reaches us from the sun by convection.

4. convection currents can happen in water but not air.

  • physics -

    1 true, (but not always, for example water rises buoyantly close to the freezing point. )

    2. large volume

    3. radiation (no convection can occur in a vacuum

    4. convection can happen in any old fluid, air, water, whatever

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics: true or false

    1. In a gas kept at a constant temperature, all molecules move with the same speed. A. True B. False 2. A hot object has more thermal energy than a similar cold object only because of greater kinetic energy. A. True B. False 3. The …
  2. Grammar and Composition

    please check my answers: Write true if the statement is true, and false if the statement is false. 1. An Etymology is a type of dictionary. False 2. An unabridged dictionary is a condensed version. False 3. Etymologies appear in [ …
  3. chemistry

    In the chemical plating experiment zinc powder is dissolved in a hot NaOH solution to form sodium zincate according to the following reacton: Zn(s) + 2NaOH(aq) Na2ZnO2(aq) + H2(g) Answer true or false for each of the following statements …
  4. math\

    2. A data set consists of a set of numerical values. Which, if any, of the following statements could be correct?
  5. statistics

    1. Which of the following statements are correct?
  6. physics

    if the following sentance true or false, also can you please write the correct version of it if false. if you want a small volume of hot water, you should place the immersion heater near the bottom of the hot water tank.
  7. HEALTH HELP PLEASE!!

    Fats help maintain your cell membranes. (1 point) True False 12. Your body does not use energy when you sleep. (1 point) True False 13. People with anorexia nervosa eat large amounts of food and then purge. (1 point) True False 14. …
  8. Physics Please check my answers

    1. A fluid can only be a liquid. True << False 2. One atmosphere is equal to 14.7 psi. True << False 3. In a fluid, pressure depends on the density of the fluid and the depth. True False << 4. Pascal's Principle says …
  9. Spanish 3 Homework.

    Hello. For these questions I have to specify whether these sentences are in the correct Spanish form. 1. “Tú das la tarea a tu maestro.” con pronombres es “Tú le la das.” True or false **FALSE 2. “El hombre manda un mensaje …
  10. French Check Ms. Sue

    Please check this. Thank you! 1. France is a country in Asia. true false*** 2. There are many countries in Africa where French is one of the principal languages of the people. true false 3. Québec, in Canada, is a French speaking …

More Similar Questions