# Julia Aguilar

Physics teacher | Experienced educator in USA

A Physics graduate from Seattle Pacific University, I'm passionate about unraveling the wonders of the universe. With a commitment to fostering curiosity, I thrive on helping students grasp the intricacies of the subject. My approach combines a solid academic foundation with a knack for simplifying complex concepts. Let's embark on a journey of discovery together, where no question is too challenging.

## Questions

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?

What torque would have to be applied to a rod with a length of #5 m# and a mass of #2 kg# to change its horizontal spin by a frequency of #24 Hz# over #8 s#?

A charge of #16 C# is passing through points A and B on a circuit. If the charge's electric potential changes from #24 J# to #3 J#, what is the voltage between points A and B?

A ball with a mass of # 5 kg# is rolling at #6 m/s# and elastically collides with a resting ball with a mass of #9 kg#. What are the post-collision velocities of the balls?

Why do batteries run down?

An object travels North at # 5 m/s# for #3 s# and then travels South at # 4 m/s# for # 6 s#. What are the object's average speed and velocity?

A cylinder has inner and outer radii of #8 cm# and #16 cm#, respectively, and a mass of #6 kg#. If the cylinder's frequency of counterclockwise rotation about its center changes from #2 Hz# to #7 Hz#, by how much does its angular momentum change?

What is the gravitational potential energy of a # 4 kg# object on a shelf # 3/5 m # high?

An object with a mass of #2 kg# is acted on by two forces. The first is #F_1= < 9 N , 5 N># and the second is #F_2 = < 7 N, -6 N>#. What is the object's rate and direction of acceleration?

An object is at rest at #(2 ,9 ,5 )# and constantly accelerates at a rate of #1/5 m/s# as it moves to point B. If point B is at #(6 ,2 ,7 )#, how long will it take for the object to reach point B? Assume that all coordinates are in meters.

Why is electric power transmitted at high voltages?

An object with a mass of #12 kg#, temperature of #210 ^oC#, and a specific heat of #7 J/(kg*K)# is dropped into a container with #32 L # of water at #0^oC #. Does the water evaporate? If not, by how much does the water's temperature change?

Is the angle of refraction measured from the boundary?

The latent heat of fusion of water is 334 J/g. How much energy is released when 20 grams of water at 0°C undergoes freezing?

An object with a mass of #8 kg# is on a plane with an incline of # - pi/3 #. If it takes #15 N# to start pushing the object down the plane and #12 N# to keep pushing it, what are the coefficients of static and kinetic friction?

A projectile is shot at an angle of #pi/3 # and a velocity of # 46 m/s#. How far away will the projectile land?

If a projectile is shot at an angle of #pi/6# and at a velocity of #18 m/s#, when will it reach its maximum height??

A stone, initially at rest on a horizontal plane is hit by a bullet travelling horizontally, which then rebounds horizontally at right angles to its initial direction of travel. How is this possible?

A driver of a car traveling at 15.9 m/s applies the brakes, causing a uniform deceleration of 2.5 m/s2 How long does it take the car to accelerate to a final speed of 10.2 m/s? Answer in units of s

An object travels North at #4 m/s# for #9 s# and then travels South at #6 m/s# for # 2 s#. What are the object's average speed and velocity?