Problem based on focal length of the lens
A simple single lens camera (biconvex lens) is used to photograph a man 1.5 m tall who is standing 5.0 m from the camera. if the mans image fills the length of a frame of film (35mm) what is the focal length of the lens?
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After three years, there is $1816.33 in the account. Find the initial amount placed in the account. Round your answer to the nearest cent.
A projectile is launched with an initial velocity of 80 m/s at an angle of 30º above the horizontal. Neglecting air resistance, what is the horizontal component of the projectile's acceleration?
For a given sample of CH3OH, the enthalpychange on reaction is 25.8 kJ. How many grams of hydrogen gases are produced?
Two speakers are driven by the same sound wave of wavelength .50m. if the distances from a point to the speakers differ by 1.0 m, will the waves interface constructively or destructively? Justify your answer.
The mass of a radioactive substance follows a continuous exponential decay model, with a decay rate parameter of 8% per day. Find the mass of the sample after six days.
Using triangles to construct the polygon and an appropriate double-angle formula, determine the formula of the area of the n-sided polygon as a function of R and n, i.e., A = f(R,n).
The orbital speeds of the planets are determined to be 42.1 km/s and 56.4 km/s. The slower planet's orbital period is 7.93 years. (a) What is the mass of the star? (b) What is the orbital period of the faster planet, in years?
A current 1.00 g sample of carbon shows 921 disintegrations perhour. If 1.00 g of charcoal from an archeological dig in alimestone cave in Slovenia shows5.50 x 103 disintegrations in 25.2 h, what is the age of the charcoal sample?
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