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Questions in physics

[Terjawab] The momentum of a system before a collision is [tex]$2.4 \times 10^3 kilogram$[/tex] meters/second in the [tex]$x$[/tex]-direction and [tex]$3.5 \times 10^3 kilogram$[/tex] meters/second in the [tex]$y$[/tex] direction. What is the magnitude of the resultant momentum after the collision if the collision is inelastic? A. [tex]$1.7 \times 10^3$[/tex] kilogram meters/second B. [tex]$2.1 \times 10^3$[/tex] kilogram meters/second C. [tex]$3.4 \times 10^3$[/tex] kilogram meters/second D. [tex]$4.2 \times 10^3 kilogram$[/tex] meters/second E. [tex]$5.7 \times 10^3$[/tex] kilogram meters/second

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

[Terjawab] Heat transfer between two substances is affected by specific heat and the A. chemical composition of the substances. B. state of matter of the substances at room temperature. C. thermal equilibrium of the substances. D. amount of time and area of physical contact between the substances.

[Terjawab] Which equation represents a fission reaction? ${ }_7^{14} N+{ }_1^1 H \longrightarrow{ }_8^{15} O$ ${ }_{92}^{235} U +{ }_0^1 n \longrightarrow{ }_{55}^{140} Cs +{ }_{37}^{94} Rb +2_0^1 n$ ${ }_4^9 Be +{ }_2^4 He \longrightarrow{ }_6^{12} C +{ }_0^1 n$ ${ }_{93}^{239} Np \longrightarrow{ }_{94}^{239} Pu +{ }_{-1}^0 e$

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

[Terjawab] [tex]$\beta$[/tex] - decay producing ${ }_{56}^{137} Ba$

[Terjawab] Which equation correctly relates mechanical energy, thermal energy, and total energy when there is friction present in a system? A. [tex]$ME =E_{\text {thermal }}-E_{\text {total }}$[/tex] B. [tex]$ME =E_{\text {total }}-E_{\text {thermal }}$[/tex] C. [tex]$ME =E_{\text {total }}+E_{\text {thermal }}$[/tex] D. [tex]$ME =\frac{E_{\text {total }}}{E_{\text {thermal }}}$[/tex]

[Terjawab] Which symbol and unit of measurement are used for voltage? A. symbol: V; unit: A B. symbol: R; unit Q: C. symbol: V; unit: V D. symbol: R; unit: V

[Terjawab] _______ amplitudes are associated with _______ sounds. Options: 1. higher; louder 2. higher; weaker 3. higher; quieter 4. lower; louder

[Terjawab] A tube with no vacuum would be an example of equipment error. True False