# 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 truck pulls boxes up an incline plane. The truck can exert a maximum force of #4,800 N#. If the plane's incline is #(3 pi )/8 # and the coefficient of friction is #9/7 #, what is the maximum mass that can be pulled up at one time?

How does energy change forms?

If an object with a mass of #10 kg # is moving on a surface at #15 m/s# and slows to a halt after # 7 s#, what is the friction coefficient of the surface?

A box with an initial speed of #2 m/s# is moving up a ramp. The ramp has a kinetic friction coefficient of #5/7 # and an incline of #(3 pi )/8 #. How far along the ramp will the box go?

An object has a mass of #4 kg#. The object's kinetic energy uniformly changes from #84 KJ# to # 96KJ# over #t in [0, 6 s]#. What is the average speed of the object?

A balanced lever has two weights on it, the first with mass #15 kg # and the second with mass #9 kg#. If the first weight is # 4 m# from the fulcrum, how far is the second weight from the fulcrum?

An object with a mass of #2 kg#, temperature of #244 ^oC#, and a specific heat of #33 (KJ)/(kg*K)# is dropped into a container with #16 L # of water at #0^oC #. Does the water evaporate? If not, by how much does the water's temperature change?

A #5 L# container holds #5 # mol and #6 # mol of gasses A and B, respectively. Every three of molecules of gas B bind to two molecule of gas A and the reaction changes the temperature from #360^oK# to #210 ^oK#. By how much does the pressure change?

Some very hot rocks have a temperature of #210 ^o C# and a specific heat of #150 J/(Kg*K)#. The rocks are bathed in #121 L# of boiling water. If the heat of the rocks completely vaporizes the water, what is the minimum combined mass of the rocks?

My motorcycle travels #220# #km# in #2.25# hours. How would I correctly express its velocity in the appropriate SI units, #ms^-1#?

Some very hot rocks have a temperature of #340 ^o C# and a specific heat of #540 J/(Kg*K)#. The rocks are bathed in #64 L# of boiling water. If the heat of the rocks completely vaporizes the water, what is the minimum combined mass of the rocks?

An object with a mass of #7 kg# is pushed along a linear path with a kinetic friction coefficient of #u_k(x)= 1-cos(pi/4-x/6) #. How much work would it take to move the object over #x in [0, 8pi], where x is in meters?

The gas inside of a container exerts #15 Pa# of pressure and is at a temperature of #450 ^o K#. If the pressure in the container changes to #25 Pa# with no change in the container's volume, what is the new temperature of the gas?

A ball with a mass of #2kg# moving at #8 m/s# hits a still ball with a mass of #6 kg#. If the first ball stops moving, how fast is the second ball moving?

How do magnetic forces pass through objects?

The period of a 10 Hz wave is ?

An object travels North at # 12 m/s# for #1 s# and then travels South at # 5 m/s# for # 7 s#. What are the object's average speed and velocity?

How much power is produced if a voltage of #6 V# is applied to a circuit with a resistance of #3 Omega#?

How does power differ from energy?

A box with an initial speed of #3 m/s# is moving up a ramp. The ramp has a kinetic friction coefficient of #1/6 # and an incline of #( pi )/3 #. How far along the ramp will the box go?