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Questions in physics

[Terjawab] Class 4 listed the particles in a solid. Correct their mistakes. | Particles in a solid | Tick (✔) if correct | Correct answer | |-------------------------------|---------------------|----------------| | are not moving | ✓ | | | are arranged untidily | | | | are all the same size | | | | are tightly packed together | ✓ | | | are all touching | ✓ | | Write T or F beside each statement. Correct the false statements.

[Terjawab] What would be Kelly's weight in newtons if her mass is 70 kilograms? A. [tex]$70 \times g$[/tex] B. 70 g C. 70 [tex]$g^2$[/tex] D. [tex]$70 \times g^2$[/tex] E. 70

[Terjawab] Which of the following means the material has the same properties at every point; it is uniform without irregularities? A. Homogeneous B. Constant C. Isotropic D. Prismatic

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

[Terjawab] If the imaginary surface necessary to apply C-40-8 Law is called: A. Cartesian Statute B. Bipolar Surface C. Gaussian Surface D. None of the above If the surface under consideration is not perpendicular to the field lines, then the expression for: What is the integral form of the expression [tex]$2+1,1 cos e = \frac{?}{s_0}$[/tex] A. [tex]$\int x-a x=\frac{!!}{6!}$[/tex] B. [tex]$\int K \cdot(-\frac{9}{8} C \cdot \int d \cdot d K=\frac{9}{6}$[/tex] C. [tex]$\int h / 4=\frac{1}{4}$[/tex] The expression for current density flowing through a conductor is represented by: A. phil B. posted C. shill D. enl A 10 m length of copper wire has a diameter of 1 mm. Find the current density if it carries a current of 1.2 A. A. [tex]$8.7807 \times 10^{\circ}- m ^2$[/tex] B. [tex]$0.7897 \times 108 Alm ^2$[/tex] C. [tex]$6.7897 \times 10^4 A / m ^2$[/tex] D. [tex]$6.7891 \times 10 %$[/tex] Which of the following expressions is not a representation of Ohm's law? A. [tex]$\frac{U 2}{C A}$[/tex] B. [tex]$\frac{14}{A}$[/tex] C. [tex]$|\rho|$[/tex] D. pH The null deflection of a Potentiometer refers to: A. When the galvanometer attached to the jockey deflects to the left B. When the galvanometer attached to the jockey deflects to the right C. When the galvanometer attached to the jockey rotates through 180 degrees D. When the potential across the galvanometer cancels out

[Terjawab] How much heat is needed to raise the temperature of 100.0 grams of water from 25.0°C to 55.0°C? Specific heat capacity of water is 4.184 J/g°C.

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

[Terjawab] Select the correct answer. Which statement is true for objects in dynamic equilibrium? A. Objects have zero acceleration. B. Objects have non-zero positive acceleration. C. Objects have non-zero negative acceleration. D. Objects can have positive as well as negative acceleration. E. Objects have forces which are not balanced in at least one direction.

[Terjawab] Which refers to the number of wavelengths that pass a fixed point in a second? A. wavelength B. amplitude C. frequency D. compression

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