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Questions in physics

[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] The power of the kettle was 2.6 kW. The kettle took 120 seconds to heat 0.80 kg of water from 18 °C to 100 °C. Calculate the specific heat capacity of water using this information. Give your answer to 2 significant figures.

[Jawaban] A sample of water with a mass of 123.00 kg is heated from 25 C to 97 C. If the specific heat of water is [tex]$1 J-1 kg K -1$[/tex] then how much energy is required? A. 11.93 kJ B. 123.00 kJ C. 15.01 kJ D. 8.86 kJ

[Jawaban] The primary factor in decreasing the Kinetic Energy of an object is to: A. Decrease the stopping distance B. Decrease the mass C. Decrease the velocity D. Decrease the direction

[Jawaban] In a scenario where a thin metallic strip on a vernier caliper descends from the upper edge to the lower edge and makes constant contact with the surface of a beaker, the main scale displays a reading of 6.40 mm with a vernier constant of 1.1 mm, and the fourth vernier scale division aligns precisely with a main scale division. Determine the precise depth of the beaker, assuming there is no zero error.

[Jawaban] An aluminum block of mass 12.00 kg is heated from 20 C to 118 C. If the specific heat of aluminum is $913 J-1 kg K -1$ then how much energy is required? A. 1073.688 kJ B. 64.640 kJ C. 7456.167 kJ D. 10.956 kJ

[Jawaban] What does the wavelength of a wave measure? A. The width of the wave B. The speed of the wave C. The height of the wave D. The number of waves per second

[Jawaban] Given the following: Main scale reading: 6.4 cm Vernier scale reading: [tex]4 \times 0.01 cm=0.04 cm[/tex] Vernier constant = 0.1 mm [tex]\begin{aligned} \text { TS } & =\text { MSR }+ \text { USR } \\ \text { TS } & =0.04 cm+6.4 cm \times \\ \text { TS } & =6.4 cm+0.04 \times 0.1 \\ & =6.4 cm+ \end{aligned}[/tex] What is the precise depth of the beaker, assuming there is no zero error?

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