The chemical elements are arranged in order of increasing atomic number. The rows are called periods and the columns are called
1 answer:
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Answer:
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Explanation:
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Answer:
a)
b)
c)
Explanation:
From the exercise we know the initial velocity of the projectile and its initial height
To find what time does it take to reach maximum height we need to find how high will it go
b) We can calculate its initial height using the following formula
Knowing that its velocity is zero at its maximum height
So, the projectile goes 1024 ft high
a) From the equation of height we calculate how long does it take to reach maximum point
Solving the quadratic equation
So, the projectile reach maximum point at t=2s
c) We can calculate the final velocity by using the following formula:
Since the projectile is going down the velocity at the instant it reaches the ground is:
Answer:
(i)
(ii)
Explanation:
Let t be the average thickness of the sheet.
Given that:
Density of the aluminum sheet is
Mass of sheet = 60.7 g
Length of sheet = 50.0 cm
Width of sheet = 30.0 cm
(i) Using, Density=Mass/Volume
Hence, the volume of the sheet is .
(ii) Now, as this aluminum sheet is in the shape of a cuboid, so the volume of the sheet is
Hence, the average thickness of the sheet is .