explain how electrical energy is generated, transmitted, and distributed
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Q 1/50
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The initial velocity of Manuel playing “luksong tinik” has horizontal and vertical components that are equal in magnitude. What angle does his velocity make with the horizontal?
30
30˚
90˚
60˚
45˚
Q 2/50
Score 0
A Sepak takraw that is kicked from a height of two meters a path that is .
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circular
parabolic
hyperbolic
linear
50 questions
Q.
The initial velocity of Manuel playing “luksong tinik” has horizontal and vertical components that are equal in magnitude. What angle does his velocity make with the horizontal?
1
30 sec
S9FE-IVa-34
Q.
A Sepak takraw that is kicked from a height of two meters a path that is .
2
30 sec
S9FE-IVa-34
Q.
A goalie made three soccer punts at 70˚, 50˚, and 30˚ with varying speeds – all reaching the same maximum heights. Which statement is correct?
3
30 sec
S9FE-IVa-34
Q.
A volleyball is served at a speed of 8.0 m/s at an angle 35˚ above the horizontal. What is the speed of the ball when received by the opponent at the same height?
4
30 sec
S9FE-IVa-34
Q.
A Batang Pinoy athlete from your school throws a javelin, always at the same speed, at four different angles (30˚, 40˚, 60˚, and 80˚) above the horizontal. Which two throws cause the javelin to land the same distance away?
5
30 sec
S9FE-IVa-35
Q.
Two identical cars are travelling along EDSA. Which of the two cars would have a greater momentum?
6
30 sec
Q.
A bus and a car are travelling along EDSA having the same velocity. Which of the two vehicles would have a greater momentum?
7
30 sec
S9FE-IVb-36
Q.
A 25-kg girl is riding a 5-kg with a velocity of 5 m/s the East. What is the total momentum of a girl and a bike together?
8
30 sec
S9FE-IVb-37
Q.
Which of the following is a necessary condition for the total momentum of a system to be conserved?
9
30 sec
S9FE-IVc-38
Q.
Two billiard balls approach each other with the same speed. If they collide in a perfectly elastic collision, what would be their velocities after collision?
10
30 sec
S9FE-IVb-37
Q.
What is the energy of a of a motorcycle moving slowly at the top of a hill?
11
30 sec
S9FE-IVc-39
Q.
Which event is explained in the sequence of energy changes shown in the diagram below?
12
30 sec
S9FE-IVc-39
Q.
Which event illustrates the direct transformation of potential to kinetic energy?
13
30 sec
S9FE-IVc-39
Q.
Which among the forms of energy is considered a potential energy?
14
30 sec
S9FE-IVc-39
Q.
Which of the following happens to a coconut that falls freely?
15
30 sec
S9FE-IVd-40
Q.
A torchlight fell from a watch tower. The potential energy of the torchlight at the highest point compared to its kinetic energy at the lowest point is .
16
30 sec
S9FE-IVd-40
Q.
A bag drops some distance and gains 90 J of kinetic energy. Considering air resistance, how much gravitational potential energy did the bag lose?
17
30 sec
S9FE-IVd-40
Q.
The wind-up toy that is fully wound and at rest possesses
18
30 sec
S9FE-IVe-41
Q.
In which case is there a decrease in gravitational potential energy?
19
30 sec
S9FE-IVe-41
Q.
Francis stretched a rubber band five times. After that, he observed that the rubber band felt warm. Did the rubber band gain heat?
20
30 sec
S9FE-IVf-43
Q.
An ideal gas is compressed without allowing any heat to flow into or out of the gas. What will happen to the temperature of the gas in this process?
21
30 sec
S9FE-IVg-45
Q.
While a gas does 400J of work on its surroundings, 900J of heat is added to the gas. What is the change in the internal energy of the gas?
22
30 sec
S9FE-IVe-42
Q.
If 500 calories of heat are added to a gas, and the gas expands doing 500J of work on its surroundings, what is the change in the internal energy of the gas?
23
30 sec
S9FE-IVf-43
Q.
A beaker containing 400g of water has 1200J of work done on it by stirring and 200cal of heat added to it from a hot plate. What is the change in the internal energy of the water in joules?
24
30 sec
S9FE-IVf-43
Q.
A beaker containing 400g of water has 1200J of work done on it by stirring and 200cal of heat added to it from a hot plate. Determine the change in the internal energy of the water in calories?
25
30 sec
S9FE-IVf-43
Q.
What causes thermal pollution?
26
30 sec
S9FE-IVf-44
Q.
Mang Fermin, a carpenter, is planning a piece of wood with his planar. After how many minutes, he observed that it is hot. Does the wood gain heat?
27
30 sec
S9FE-IVf-43
Q.
Renzo observes the waterfalls used in hydroelectric power plant. He found out that it flows naturally that turbine rotates. What makes this so?
28
30 sec
S9FE-IVg-45
Q.
How does water from the deep well move upward?
29
30 sec
S9FE-IVg-45
Q.
Chef Mariel left a plate of chopped apple, a plate of lettuce and a cup of pineapple in the table to answer a phone call. When she comes back, she found out that the fruit and the vegetable discolored into brown. What phenomenon explains this?
30
30 sec
S9FE-IVe-42
Q.
Given the following mechanisms, which best describes correct sequence of the refrigerator cycle?
1. compression 3. expansion
2. condensation 4. evaporation
31
30 sec
S9FE-IVg-45
Q.
What is the function of a heat engine?
32
30 sec
S9FE-IVg-45
Q.
What is the process of compression and expansion of gas so that no heat enters or leaves a system?
33
30 sec
S9FE-IVg-45
Q.
What is the correct sequence of four cycle-stroke of gasoline engine?
1. Intake 3. Exhaust
2. Power 4. Compression
34
30 sec
S9FE-IVg-45
Q.
The methods by which heat may be converted into work, which is the least practical?
35
30 sec
S9FE-IVe-42
Q.
Why is heat engine not 100% efficient?
36
30 sec
S9FE-IVf-44
Q.
Why is it colder in the countryside than in the cities?
37
30 sec
S9FE-IVg-45
Q.
In which of the following units is electrical consumption measured by electrical companies for our household consumption in our homes?
38
30 sec
S9FE-IVh-j-46
Q.
In power stations generating electricity, power is measured in
39
30 sec
S9FE-IVh-j-46
Q.
What energy transformation takes place in a generator?
40
30 sec
S9FE-IVh-j-46
Q.
Who among the following scientists discovered the relationship between electricity and magnetism?
41
30 sec
S9FE-IVh-j-46
Q.
You made an electric motor in school. When you tested it in using 4 dry cells, the armature turned very fast. What should you do to make it turn slower?
42
30 sec
S9FE-IVh-j-46
Q.
Last month, Ms. Alcantara’s electric meter reads 8765k/Wh. How much will she pay for power generation if the charge of electric company per kWh is 6.88 pesos and her meter reads 9975 this month?
43
30 sec
S9FE-IVh-j-46
Q.
Jaypeth paid Php 1250.00 for electric bill. How much energy (in kWh) is consumed if the electric company charges Php 6.88/kWh?
44
30 sec
S9FE-IVh-j-46
Q.
To reduce your electric bill
45
30 sec
S9FE-IVh-j-46
Q.
What is produced if the magnet and the conductor move relative to each other?
46
30 sec
S9FE-IVh-j-46
Q.
A 60 watt bulb is connected to 120V plug. What is the current in the bulb?
47
30 sec
S9FE-IVh-j-46
Q.
When there is a change in the magnetic field in a closed loop wire
48
30 sec
S9FE-IVh-j-46
Q.
All of the following power plants use steam to drive the turbines to produce electricity except