Lyndon is investigating whether putting plastic on her windows will help seal out cold winter drafts. She covers a window on the south side of her house with plastic and measures the inside temperature near the window. She also measures the inside temperature near a window without plastic on the north side of her house. The windows are the same size and design. Why is this not an ideal controlled investigation? A. The windows should be different sizes to introduce variation. B. The drafts at each window may be different because the windows aren’t near each other. C. Temperature isn’t a good indicator of cold winter drafts. D. Outside temperature is a better indicator of cold winter drafts than inside temperature. E. The type of plastic used in the investigation isn’t mentioned
Answers
Answer:
B. The drafts at each window may be different because the windows aren’t near each other.
Explanation:
The measurement is imprecise since the temperature will be lower in the window that receives the draft directly. that is, if the draft comes from the north, the north window will perceive lower temperatures than the south window.
Answer: B
Explanation: PLATO
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A lizard accelerates from 2 m/s to 10 m/s in 4 seconds. what is the lizard average acceleration
B. when it is at the equilibrium position
C. when it is fully stretched
D. when it is at near rest
Answers
Answer:
option (c)
Explanation:
The velocity of the oscillating body is zero when it is at its maximum displacement position from its mean position.
So, when the spring is fully stretched, means at maximum displacement the velocity is zero.
C. when it is fully stretched
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B. virtual, Inverted, and small
C. real, Inverted, and small
D. virtual, upright, and enlarged
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Answer:
real,inverted,and small
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observation
They utilize and make use of the scientific method in order to have clear basis and evidence for their investigations. Research method is always used to answer every scientific inquiry and in gaining evidential data or knowledge. The scientific method has the following process or at least undergoes the process of
1. Observation
2. Hypothesis
3. Experimentation
4. Interpretation of data
5. Evaluating the data
6. Passing and recording the data
These steps are crucial and the empirical data that these scientists obtain are very important to keep that is why research paper, thesis and dissertations exists.
B.mechanical waves
C.electromagnetic waves
D.gamma rays
Answers
Answer: The correct option is B.
Explanation:
Acoustic deals with the study of mechanical waves and the mediums through which they travel. It includes sound, infra sound, ultrasound and vibrations.
The mechanical wave is a wave which can travel through a material medium. It can travel through solid, liquid and gases. Sound is the mechanical vibrations of the particles of a gaseous medium.
Therefore, acoustic involves the study of mechanical waves and the mediums through which they travel.
Answers
Answer:
g = 4.7 × m/
Explanation:
Given that the mass of the satellite = 700 kg, and 10,000 m above the earth;s surface.
From Newton's second law,
F = mg ............... 1
From Newton's gravitation law,
F = .................. 2
Where: F is the force, G is the gravitational constant, M is the mass of the first body, m is the mass of the second body, g is the gravitational force and r is the distance between the centers of the two bodies.
Equate 1 and 2 to have,
mg =
⇒ g =
But; G = 6.67 × N
, M = 700 Kg, r = 10000 m
Thus,
g =
=
= 4.669 × m/
The force of gravity on the satellite is 4.7 × m/
.
The force of gravity on a 700kg satellite 10km above the Earth's surface can be calculated using the equation F = mg.
The force of gravity on an object is given by the equation F = mg, where F is the force of gravity, m is the mass of the object, and g is the acceleration due to gravity.
On Earth's surface, the acceleration due to gravity is approximately 9.8 m/s^2. However, as the satellite is 10 km above the Earth's surface, the force of gravity will be slightly less than that.
To calculate the force of gravity on the satellite, we can use the equation F = mg. Substituting the mass of the satellite (700 kg) and the acceleration due to gravity (9.8 m/s^2 - (9.8 m/s^2 * (10 km/ 6371 km))), we can find the force of gravity.
Learn more about force of gravity here:
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