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Questions in physics

[Jawaban] The mass to charge ratio for A⁺ ions is 1.97×10⁻⁷ kg C⁻¹. Calculate the mass of A atom. (A) 3.155×10⁻²⁶ kg (B) 3.155×10²⁹ kg (C) 31.55×10²⁶ kg (D) 6.155×10²⁸ kg

[Jawaban] Which type of galaxy has arms that contain sites of active star formation and start close to a bulge in the center? A. elliptical B. irregular C. barred spiral D. normal spiral

[Jawaban] When light bends as it passes from one transparent object to another, the light is: A. absorbed B. reflected C. refracted D. bounced

[Jawaban] An object's speed, in meters per hour, is increasing at a rate of 1,490 meters per hour per second. Which of the following is closest to this rate in feet per second squared? (Use 1 meter = 3.28 feet.) A. 0.126 B. 1.36 C. 7.57 D. 81.5

[Jawaban] Describe the difference between transverse waves and longitudinal waves. In your answer write about the way the particles move.

[Jawaban] The length of a magnet is 6 cm. Its pole strength is 40 A-m. If its magnetic moment is 2 A-m², then what is the ratio of geometric length to magnetic length? 1) 5:6 2) 4:1 3) 1:2 4) 1:4

[Jawaban] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Jawaban] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Jawaban] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Jawaban] An air bubble with a volume of 5.0 mL is released at the bottom of a lake where the pressure is 3.0 atm. When it reaches the surface, the bubble experiences a pressure of 1.0 atm. How will the volume of the air bubble change? Formula to use: [tex]P_1 V_1=P_2 V_2[/tex]