NSC 201 Natural Sciences Assignment

Reference no: EM132596470

NSC 201 Natural Sciences - Emirates College of Technology

Question 1:

Part A:
Each sentence below describes a step of the scientific method. Match each sentence with a step of the scientific method listed below.
A. Recognize a problem
B. Form a hypothesis
C. Test the hypothesis with an experiment
D. Draw conclusions
________1. Susan said, "If I fertilize my geranium plants, they will blossom."
________ 2. Justin wondered if dyes could be taken out of plant leaves, flowers, and stems.
________3. Alice soaked six different kinds of seeds in water for 24 hours. Then she planted the seeds in soil at a depth of I cm. She used the same amount of water, light, and heat for each kind of seed.
________ 4. Michael fed different diets to three groups of guinea pigs. His experiment showed that guinea pigs need vitamin C and protein in their diets.

Part B:
1. Which is hotter, 30oC or 30oF? Explain your reasoning?
2. Zero Kelvin (0K) is also called absolute zero. What is absolute zero equal to in: Celsius?... Fahrenheit?...

Question 2:
1. Define the friction? List the four types of it.
2. What is inertia? What property of an object determines how much inertia it has?
3. Which of the following has more inertia?
A. Bowling ball or tennis ball.
B. Hammer or feather.
4. What is the mass of a car that its going 2 m/s² and then hits a tree with a force of 6000N.

Question 3: 1. Use the diagram to determine the resulting displacement and the distance traveled by the skier during these three minutes.
A. Distance
B. Displacement

2. A man walks 7 km East in 2 hours and then 2.5 km West in 1 hour.Calculate :-
a) The man's average speed for the whole journey.
b) The man's average velocity for the whole journey.

3. An aircraft has a lift-off of 120km/h.
a) What minimum constant acceleration does the aircraft require if it is to be airborne after a takeoff run of 240m?
b) How long does it take the aircraft to become airborne?

4. With an initial velocity of 20 km/h, a car accelerated at 8 m/s2 for 10 seconds. Find the velocity of the car at the end of the 10 seconds?

5. To approximate the height of a water well, Martha and John drop a heavy rock into the well. 8 seconds after the rock is dropped, they hear a splash caused by the impact of the rock on the water. What is the height of the well? (Speed of sound in air is 340 m/s).

Question 4:

A. Determine whether the objects in the following problems have kinetic or potential energy.
1. A baby carriage is sitting at the top of a hill that is 21 m high. The carriage with the baby weighs 12 Kg. The carriage has ......................................energy.
Calculate it.
2. A car is traveling with a velocity of 40 m/s and has a mass of 1120 Kg. The car has
....................................energy. Calculate it.
B. A force of 5.0 N moves a 6.0 kg object along a rough floor at a constant speed of 2.5 m/s.
I. How much work is done in 25 s?
II. What power is being used?
3. Define themagnetism and magnetic fields.

Attachment:- Natural Sciences.rar

Reference no: EM132596470

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