Frogs and insects are examples of organisms showing metamorphosis. Answer If distance time graph is a straight line parallel to the time axis, the body is at rest. We should protect the endemic and endangered species. . Go back to main page or move to of page.
External fertilization It occurs outside the female body. The tadpole grows and involves abrupt changes in its structure and develops into a mature frog. . These changes mark the onset of puberty. The speed-time graph for a car is shown is Fig. The driver sees a road sign stating that there is a block in the road in 1 km. What will be its velocity 3 s after the start?.
For example,if a person moves around park and stands on place from where he started then here displacement will be zero. It involves the fusion of the male and the female gamete outside the female body. State which of the following situations are possible and give an example for each of these: a an object with a constant acceleration but with zero velocity b an object moving in a certain direction with an acceleration in the perpendicular direction. Organisms that reproduce through binary fission are bacteria and Amoeba. F g Fertilization is necessary even in asexual reproduction. Answer None of the statement is true for displacement First statement is false because displacement can be zero.
Fusion of male and female gametes take place inside the body. Question 2 Describe the process of fertilization in human beings. What will be the magnitude of displacement of the farmer at the end of 2 minutes 20 seconds from his initial position? What will be the distance covered and the displacement at the end of 2 minutes 20 s? What does the odometer of an automobile measure? Since the diameter of the circular park is 200 metre, his displacement after 140 sec is 200 metres. The fetus is present about eight weeks after the fertilization takes place. T j An embryo is made up of a single cell. English and Hindi Solutions for Class 9 chapter 10 are given below.
On the same graph paper, plot the speed versus time graphs for the two cars. Earthquake is another natural phenomena which can cause large scale destruction of human life and property. Then, they travel through the fallopian tubes where they meet the eggs. Over millions of years, absence of air, high temperature and pressure transformed the dead organisms into petroleum and natural gas. Velocity is the displacement of an object in a given interval of time. What was the distance of the spaceship from the ground station? Find the velocity of the satellite if it takes 20 hrs to finish one revolution around the earth. .
Calculate the distance and displacement. Calculate i total distance travelled, ii total displacement. Go back to main page or move to of page. Binary fission, Budding, Fragmentation etc. Chapter 10: Class 9 Physics Select one of the following to see the online solutions for chapter 10 as well as for download. What distance will it cover in 10 s after start? It is generally observed in very small sized organisms. What will be the magnitude of displacement of the farmer at the end of 2 minutes 20 seconds from his initial position? Examples are cow, humans, dogs, monkeys etc.
A bus starting from rest moves with a uniform acceleration of 0. The language used is very simple so as to clear the concepts of the student. Visit to main page or move to of page Class 9 Science — Physics -Motion Important Questions with answers Question 1: A train travels 100 m long moving on a straight level track passes a pole in 5 s. Go back to main page or move to of page. Types of combustion — rapid combustion and spontaneous combustion.
Thus, they were never at the same point on road. Answer: There is sexual reproduction in human beings. The lowest temperature at which a substance catches fire is called it ignition temperature. The car stops in 5 s. Answer: a Oviparous animals give birth to young ones. Answer : Suppose, a farmer moves along the boundary of a square field of side 10 m in 40 s as shown in the figure given below.
During an experiment, a signal from a spaceship reached the ground station in five minutes. Go for the answers on or or or and or visit for Solutions. Calculate the distance travelled by car during this time. Joseph jogs from one end A to the other end B of a straight 300 m road in 2 minutes 30 seconds and then turns around and jogs 100 m back to point C in another 1 minute. A train is travelling at a speed of 90 km h 1 Brakes are applied so as to produce a uniform acceleration of -0. What will be the distance covered and the displacement at the end of 2 minutes 20 s? A motorboat starting from rest on a lake accelerates in a straight line at a constant rate of 3. What does the path of an object look like when it is in uniform motion? If its velocity increases uniformly at the rate of 10 m s-2, with what velocity will it strike the ground? Mode of reproduction — Sexual reproduction — This type of reproduction beginning from the fusion of male and female gametes.