A magnifying lens with a focal length of 10 cm has what maximum magnification? (Assume the near point is 25 cm). Do not use the approximation formula
a. 3.5
c. 7.1
b. 2.5
d. 3.0
A
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Newton's Second Law in 1 Dimension: What magnitude net force is required to accelerate a 1200-kg car uniformly from 0 m/s to 27.0 m/s in 10.0 s?
A. 444 N B. 1620 N C. 3240 N D. 4360 N E. 11,800 N
If an element of atomic number 15 has an isotope of mass number 32
A) the number of neutrons in the nucleus is 15. B) the number of neutrons in the nucleus is 17. C) the number of protons in the nucleus is 17. D) the number of nucleons in the nucleus is 15. E) the number of protons in the nucleus is 32.
Is the mass of an atomic nucleus greater or less than the sum of the masses of the nucleons composing it? Why don't the nucleon masses add up to the total nuclear mass?
A) Greater. We need to add the masses of the surrounding electrons to the masses of the nucleons. B) Neither. The mass of the atomic nucleus is exactly the sum of the masses of the nucleons. C) Less. The individual nucleons have greater mass when separated from the nucleus. This additional mass is a result of the energy of separation. D) Greater. The mass of the atomic nucleus also has mass of the "atomic glue" that holds the nucleons together in the nucleus.
A charge q = 3 × 10-6 C of mass m = 2 × 10-6 kg, and speed v = 5 × 106 m/s enters a uniform magnetic field. The mass experiences an acceleration a = 3 × 104 m/s2. What is the minimum magnetic field that would produce such an acceleration?
A) 0.1 T B) 0.004 T C) 0.001 T D) 0.01 T E) 0.04 T