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Questions in physics

[Homework Help] According to Newton's first law, which characteristic of a moving object would remain constant if there were no other forces acting on it? A. size B. mass C. shape D. speed

[Homework Help] A frog leaps at [tex]$8.40 m / s$[/tex] at a [tex]$58.7^{\circ}$[/tex] angle to the horizon. How far away does the frog land? [tex]$\Delta x=[?] m$[/tex]

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

[Homework Help] (3 marks) The square root of a real number 1 this has no solution because a square root can't be negative, $x-3$ must be greater of equal to $\sqrt{x-3}$ 5 is negate, the square root of a real number can't be negative, The period, $T$, of a pendulum can be approximated by the formula $\approx 2 \pi \sqrt{\frac{L}{g}}$, where $L$ is the length of the pendulum and $g$ is the gravitational constant. What is the approximate length of the pendulum if it has a period of 2 s ? Note: On Earth the gravitational constant is $9.8 m / s ^2$. (3 marks)

[Homework Help] Increasing which factor will cause the gravitational force between two objects to decrease? A. weights of the objects B. distance between the objects C. acceleration of the objects D. masses of the objects

[Homework Help] What is the magnetic force on a proton that is moving at [tex]$5.2 \times 10^7 m / s$[/tex] to the left through a magnetic field that is 2.4 T? Assume that the charge on a proton is [tex]$1.6 \times 10^{-19} C$[/tex]. Use [tex]$F = qvB$[/tex]. A. [tex]$2.0 \times 10^{-11} N$[/tex] down B. [tex]$2.0 \times 10^{-11} N$[/tex] up C. [tex]$8.3 \times 10^{-12} N$[/tex] down D. [tex]$8.3 \times 10^{-12} N$[/tex] up

[Homework Help] Which statement explains how weight is different from mass? A. Mass is a varying property. B. Mass is measured in newtons. C. Weight is always greater than mass. D. Weight is a measure of gravitational pull.

[Homework Help] What are scientific questions based on? A. belief B. opinion C. pseudoscientific ideas D. empirical evidence

[Homework Help] Which law states that energy cannot be created or destroyed, but can change from one form to another? A. the law of conservation of energy B. the law of conservation of matter C. the law of gravity D. the law of motion

[Homework Help] Which change will always result in an increase in the gravitational force between two objects? A. increasing the masses of the objects and increasing the distance between the objects B. decreasing the masses of the objects and decreasing the distance between the objects C. increasing the masses of the objects and decreasing the distance between the objects D. decreasing the masses of the objects and increasing the distance between the objects