Answer:
created, destroyed, transforms
Explanation:
Energy cannot be created nor destroyed.
Energy is transformed from one form to another form.
- This is the postulate of the law of conservation of energy.
Energy is neither created nor destroyed simply implies that energy is not produce in any system. Nor is it destroyed.
What we have is energy transformation from one form to another.
The uncertainty of the heavy object if the scale remains constant is 0.24 lbs.
<h3>What is uncertainty in measurement?</h3>
- This is the error associated in an attempt measure the object accurately.
The percent uncertainty in measuring the light weight object is calculated as follows;
The uncertainty of the heavy object if the scale remains constant is calculated as follows;
Learn more about percent uncertainty here: brainly.com/question/5493941
Answer: b) TRUE and d) TRUE
Explanation: a) FALSE the electric field lines are used to represent the charges postives and negatives.
b) TRUE it is the definition of electric field lines , they are tangent to the electric field vector.
c) FALSE the electric field lines only for conductor are perpendicular to the surface in other any situation there is a tangencial electric field components.
d) TRUE since it is a way to describe and imagine the effect of vectorial fields.
e) FALSE
Answer:
42.5 Hz.
Explanation:
The fundamental frequency of a closed pipe is given as
f₀ = v/4l....................... Equation 1
Where f₀ = lowest frequency, v = speed of sound in air, l = length of the organ pipe
Given: v = 340 m/s, l = 2.00 m.
Substitute into equation 1
f₀ = 340/(4×2)
f₀ = 340/8
f₀ = 42.5 Hz.
Hence the smallest frequency that will resonant in the organ pipe = 42.5 Hz.
Answer:
a) .
b) .
Explanation:
a) What is the speed of the rock just before it hits the street?
From Kinematics we have .
If we take the top of the roof as the position , then
and we have (also, ) :
⇒
⇒ .
b) How much time elapses from when the rock is thrown until it hits the street?
From Kinematics we have
When the rock touches the ground:
With a minus sign to indicate the vector velocity points down.
(remember that )