An iron ball at 40° C is dropped in a mug containing water at 40° C. The heat will(a) flow from iron ball to water.(b) not flow from iron ball to water or from water to iron ball.(c) flow from water to iron ball.(d) increase the temperature of both.
When an iron ball at 40o C is dropped in a mug containing water at 40o C, the heat will not flow from iron ball to water or from water to iron ball. It is because of the fact that both the substances, the water and the iron have the same temperature. As heat flows from a body at a higher temperature to a body at low temperature.
Related Articles
- A cylindrical tub of radius $16\ cm$ contains water to a depth of $30\ cm$. A spherical iron ball is dropped into the tub and thus level of water is raised by $9\ cm$. What is the radius of the ball?
- Why does ball not float in water?
- A cylinder of radius $12\ cm$ contains water to a depth of $20\ cm$. A spherical iron ball is dropped into the cylinder and thus the level of water is raised by $6.75\ cm$. Find the radius of the ball. (Use $\pi = \frac{22}{7}$).
- Give two reasons to justify:(a) water at room temperature is a liquid.(b) an iron almirah is a solid at room temperature.
- When a golf ball is lowered into a measuring cylinder containing water, the water level rises by 30 cm3 when the ball is completely submerged. If the mass of ball in air is $33\ g$, find its density.
- Can sound travel through (a) iron, and (b) water?
- What is the speed of sound:(a) in air? (b) in water? (c) in iron?
- Give two reasons to justify that :(a) Water is a liquid at room temperature.(b) An iron almirah is a solid.
- A water tank has four taps fixed at points A, B, C and D as shown in figure. The water will flow out at the same pressure from taps at$(a)$. B and C $(b)$. A and B $(c)$. C and D $(d)$. A and C"
- A ball is dropped from a height of $10\ m$. If the energy of the ball reduces by 40% after striking the ground, how much high can the ball bounce back? $(g=10\ m s^{-2})$
- A bag contains 7 white and 12 red balls. One ball is drawn at random from the bag. Find the probability of getting (a) a red ball (b) a white ball.
- A cylindrical tub of radius $12\ cm$ contains water to a depth of $20\ cm$. A spherical form ball is dropped into the tub and thus the level of water is raised by $6.75\ cm$. What is the radius of the ball?
- A cylindrical tub of radius \( 12 \mathrm{~cm} \) contains water to a depth of \( 20 \mathrm{~cm} \). A spherical ball is dropped into the tub and the level of the water is raised by \( 6.75 \mathrm{~cm} \). Find the radius of the ball.
- Write word equations for two chemical reactions with the help of materials given in the box.[ Air, copper sulphate, iron, vinegar, iron oxide, carbon dioxide, iron sulphate, copper, lime water, water ]
- (a) Name one metal which can displace iron from iron sulphate solution.(b) Name one metal which cannot displace iron from iron sulphate solution.
Kickstart Your Career
Get certified by completing the course
Get Started
Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies