# 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

An object is thrown vertically from a height of #12 m# at # 7 m/s#. How long will it take for the object to hit the ground?

Two springs have different spring constants. How could you identify the spring with the greater spring constant value?

A charge of #-2 C# is at #(-2 , -7 )# and a charge of #6 C# is at #(5, 3) #. If both coordinates are in meters, what is the force between the charges?

The force applied against an object moving horizontally on a linear path is described by #F(x)=xe^x+ 1/x #. By how much does the object's kinetic energy change as the object moves from # x in [ 1, 3 ]#?

What torque would have to be applied to a rod with a length of #5 # and a mass of #5 kg# to change its horizontal spin by a frequency of #3 Hz# over #4 s#?

What is the minimum energy required to lift an object weighing 200 newtons to a height of 20 meters?

An object with a mass of #8 kg# is hanging from a spring with a constant of #9 (kg)/s^2#. If the spring is stretched by # 11 m#, what is the net force on the object?

Nancy throws a ball toward a basket 3.2 m off the ground. The rule associated with the ball's trajectory is #y = -.4(x-6)^2 + 3.6#. Nancy throws the ball at a distance of 3 m from the basket. From what height did Nancy throw the ball?

An astronaut with a mass of #95 kg# is floating in space. If the astronaut throws an object with a mass of #8 kg# at a speed of #3/8 m/s#, how much will his speed change by?

A block weighing #6 kg# is on a plane with an incline of #(3pi)/8# and friction coefficient of #2/5#. How much force, if any, is necessary to keep the block from sliding down?

Can someone help verify the answer?

A baseball goes from zero to 44 m/s in 0.153 s. What is its average acceleration?

If an object is moving at #40 m/s# over a surface with a kinetic friction coefficient of #u_k=12 /g#, how far will the object continue to move?

Some very hot rocks have a temperature of #1700 ^o C# and a specific heat of #210 J/(Kg*K)#. The rocks are bathed in #56 L# of boiling water. If the heat of the rocks completely vaporizes the water, what is the minimum combined mass of the rocks?

A 5.4 kg bag of groceries is in equilibrium on an incline of angle 15°. What is the magnitude of the normal force on the bag?

What are some examples of the principle of conservation of energy?

Can static electricity and electric current occur simultaneously in the same object?

An athlete jumps with the speed of 4 m/s at an angle of 23°. How long does the athlete stay in the air?

A solid disk, spinning counter-clockwise, has a mass of #7 kg# and a radius of #5/2 m#. If a point on the edge of the disk is moving at #4/3 m/s# in the direction perpendicular to the disk's radius, what is the disk's angular momentum and velocity?

An object with a mass of #18 kg#, temperature of #270 ^oC#, and a specific heat of #8 J/(kg*K)# is dropped into a container with #48 L # of water at #0^oC #. Does the water evaporate? If not, by how much does the water's temperature change?