In a mass spectrometer, a singly-charged particle (charge e) has a speed of 1.0 × 106 m/s and enters a uniform magnetic field of 0.20 T. The radius of the circular orbit of the particle is 0.020 m
What is the mass of this particle? (e = 1.60 × 10-19 C)
A) 3.2 × 10-28 kg
B) 6.4 × 10-28 kg
C) 1.7 × 10-27 kg
D) 4.5 × 10-27 kg
E) 3.1 × 10-31 kg
B
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Two objects having masses m1 and m2 are connected to each other as shown in the figure and are released from rest
There is no friction on the table surface or in the pulley. The masses of the pulley and the string connecting the objects are completely negligible. What must be true about the tension T in the string just after the objects are released? A) T = m2g B) T > m2g C) T < m2g D) T = m1g E) T > m1g
An electron is released from rest at a distance of 9.00 cm from a proton. If the proton is held in place,
how fast will the electron be moving when it is 3.00 cm from the proton? (mel = 9.11 x 10-31 kg, e = 1.60 × 10-19 C, k = 1/4??0 = 8.99 × 109 N ? m2/C2) A) 75.0 m/s B) 106 m/s C) 1.06 × 103 m/s D) 4.64 × 105 m/s E) 130 m/s
A cylindrical rod of 3 cm diameter has a surface temperature of 300ºC when in a free stream of engine oil at 80ºC moving at 12 m/s. Determine the heat transfer per unit length of the rod.
What will be an ideal response?
The photosphere is about 100 times the diameter of the Earth, and large sunspots are larger than our whole planet
Indicate whether the statement is true or false