# Isabella Alvarez

Physics teacher | Tutor for 10 years

I hold a degree in Physics from New Mexico Tech. With a passion for unraveling the mysteries of the universe, I thrive on sharing my knowledge with curious minds. Through interactive sessions, I simplify complex concepts, making physics accessible and engaging for students. Whether it's classical mechanics or quantum theory, I foster a supportive environment where questions are encouraged and critical thinking flourishes. My goal is to inspire a lifelong love of learning and empower students to explore the wonders of science. Let's embark on a journey of discovery together!

## Questions

The position of an object moving along a line is given by #p(t) = 5t - cos(( pi )/3t) + 2 #. What is the speed of the object at #t = 13 #?

If an object with uniform acceleration (or deceleration) has a speed of #2 m/s# at #t=0# and moves a total of 90 m by #t=6#, what was the object's rate of acceleration?

A container with a volume of #8 L# contains a gas with a temperature of #270^o C#. If the temperature of the gas changes to #390 ^o K# without any change in pressure, what must the container's new volume be?

Does the entropy of the space into which a star radiates (which has a temperature of about 3 k) increase or decrease? what does this do to the entropy of the universe?

A ball with a mass of #12kg# moving at #6 m/s# hits a still ball with a mass of #7 kg#. If the first ball stops moving, how fast is the second ball moving?

What is the Ideal gas law?

A cylinder has inner and outer radii of #2 cm# and #4 cm#, respectively, and a mass of #15 kg#. If the cylinder's frequency of counterclockwise rotation about its center changes from #3 Hz# to #7 Hz#, by how much does its angular momentum change?

Objects A and B are at the origin. If object A moves to #(4 ,-1 )# and object B moves to #(7 ,1 )# over #3 s#, what is the relative velocity of object B from the perspective of object A? Assume that all units are denominated in meters.

An object with a mass of #120 g# is dropped into #640 mL# of water at #0^@C#. If the object cools by #36 ^@C# and the water warms by #12 ^@C#, what is the specific heat of the material that the object is made of?

Please answer it in a sentence from the picture below?

An electric toy car with a mass of #4 kg# is powered by a motor with a voltage of #12 V# and a current supply of #15 A#. How long will it take for the toy car to accelerate from rest to #5 m/s#?

The rate of rotation of a solid disk with a radius of #9 m# and mass of #5 kg# constantly changes from #24 Hz# to #15 Hz#. If the change in rotational frequency occurs over #5 s#, what torque was applied to the disk?

An object with a mass of #2 kg# is hanging from an axle with a radius of #3 m#. If the wheel attached to the axle has a radius of #14 m#, how much force is needed to raise the object?

A model train, with a mass of #2 kg#, is moving on a circular track with a radius of #6 m#. If the train's kinetic energy changes from #2 j# to #96 j#, by how much will the centripetal force applied by the tracks change by?

What is the projectile motion equation?

How much work does it take to push an object with a mass of #2 kg# up a #7 m# ramp, if the ramp has an incline of #(11pi)/12 # and a kinetic friction coefficient of #8 #?

An electric toy car with a mass of #6 kg# is powered by a motor with a voltage of #9 V# and a current supply of #7 A#. How long will it take for the toy car to accelerate from rest to #8/3 m/s#?

A projectile is shot from the ground at an angle of #pi/8 # and a speed of #5 /7 m/s#. Factoring in both horizontal and vertical movement, what will the projectile's distance from the starting point be when it reaches its maximum height?

A solid disk with a radius of #5 m# and mass of #2 kg# is rotating on a frictionless surface. If #3 W# of power is used to increase the disk's rate of rotation, what torque is applied when the disk is rotating at #4 Hz#?

A ball with a mass of #7 kg# moving at #4 m/s# hits a still ball with a mass of #9 kg#. If the first ball stops moving, how fast is the second ball moving?