Answer:
1.503 J
Explanation:
Work done in stretching a spring = 1/2ke²
W = 1/2ke²........................... Equation 1
Where W = work done, k = spring constant, e = extension.
Given: k = 26 N/m, e = (0.22+0.12), = 0.34 m.
Substitute into equation 1
W = 1/2(26)(0.34²)
W = 13(0.1156)
W = 1.503 J.
Hence the work done to stretch it an additional 0.12 m = 1.503 J
A. Sound B will be louder than sound A
B. Sound C will be louder than sound A
C. Sound B
D. Sound C
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Answer:
1000N,4.48m/s
Explanation:
Height(h) = 1m
P. E = 1000J
P. E = mass x acceleration due to gravity x height
Acceleration due to gravity = 10m/s
P. E = mgh
Where weight = mg
P. E = weight x height
Weight = P. E / height
Weight = 1000 / 1
Weight. 1000N
b) as he leaves the ground P. E = K. E
P. E = 1/2 mv2
P. E = 1000 , mass = weight / 10
Mass =1000/10 = 100kg
P. E = 1/2 mv2
1000 = 1/2 x 100 x v2
Multiply both sides by 2
1000 x 2 = 100 x v2
V2 = 2000/ 100
V2 =20
Square root both sides
V = square root of 20
V = 4.48m/s
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Food and drug administration (FDA) is used for protecting the public health in safety, security, drugs, biological products, and medicinal devices.
Explanation:
The U.S food and Drug Act tells about the sale of misbranded or adulterated food and drugs in interstate commerce and had a foundation for the nation's first consumer protection agency.
The federal law is passed to establish the quality standards for foods, drugs and medical devices manufactured and sold in U.S.
This act has a new consumer protection against unlawful cosmetics and medical devices and enhances the government's ability to enforce the law. The main goal of FDA is to make food and drug safe for public consumption.
