# Elena Albarran

Physics teacher | Verified Expert

With a Physics degree from the University of West Florida, I'm passionate about unraveling the mysteries of the universe. As a dedicated tutor, I bring clarity to complex concepts, making physics accessible to all. My goal is to ignite curiosity and foster understanding in every student I work with. Let's embark on a journey of discovery together!

## Questions

A charge of #12 C# is passing through points A and B on a circuit. If the charge's electric potential changes from #58 J# to #42 J#, what is the voltage between points A and B?

If an object with uniform acceleration (or deceleration) has a speed of #2 m/s# at #t=0# and moves a total of 12 m by #t=5#, what was the object's rate of acceleration?

How do you normalize #(- 4i + 5 j- k)#?

A ball with a mass of #400 g# is projected vertically by a spring loaded contraption. The spring in the contraption has a spring constant of #64 (kg)/s^2# and was compressed by #3/4 m# when the ball was released. How high will the ball go?

A balanced lever has two weights on it, the first with mass #4 kg # and the second with mass #6 kg#. If the first weight is # 8 m# from the fulcrum, how far is the second weight from the fulcrum?

How do gas laws apply to breathing?

A balanced lever has two weights on it, the first with mass #14 kg # and the second with mass #9 kg#. If the first weight is # 2 m# from the fulcrum, how far is the second weight from the fulcrum?

A ball is thrown vertically downwards from a height of 20 m with a initial velocity v0. It colloids with the ground, loses 50 % of its energy in collision and rebounds to the same height. The initial velocity v0 is .....??? Please explain it briefly.

If an object is moving at #150 m/s# over a surface with a kinetic friction coefficient of #u_k=2250 /g#, how far will the object continue to move?

How does acceleration affect motion?

2 point masses each having mass #m# are placed at a distance #2a#.Escape velocity for a mass #m# projected from position P?

An object has a mass of #5 kg#. The object's kinetic energy uniformly changes from #150 KJ# to # 42KJ# over #t in [0,8s]#. What is the average speed of the object?

How much work would it take to horizontally accelerate an object with a mass of #6 kg# to #7 m/s# on a surface with a kinetic friction coefficient of #3 #?

What is the uncertainty principle?

For the equation #v_f^2=v_i^2 + 2ad#, how do you solve for #v_i#?

A centrifuge has an angular velocity of 3,000 rpm, what is the acceleration (in unit of the earth gravity) at a point with a radius of 10 cm?

Light of frequency 5×10^4 is travelling in a medium of refractive index 1.5. What is the wavelength?

A container has a volume of #72 L# and holds #6 mol# of gas. If the container is compressed such that its new volume is #3 L#, how many moles of gas must be released to maintain a constant temperature and pressure?

An object with a mass of # 15 kg# is on a ramp at an incline of #pi/8 #. If the object is being pushed up the ramp with a force of # 7 N#, what is the minimum coefficient of static friction needed for the object to remain put?

An object with a mass of #3 kg# is pushed along a linear path with a kinetic friction coefficient of #u_k(x)= e^x-2x+3 #. How much work would it take to move the object over #x in [3, 4], where x is in meters?