# Parker Abbott

Physics teacher | Verified Expert

I hold a degree in Physics from Texas Tech University, and my passion lies in unraveling the intricacies of the universe. With a commitment to fostering understanding, I bring my expertise to the realm of online education. As your tutor, I'm dedicated to providing clear and concise answers to your questions across various subjects. Let's embark on a journey of knowledge together.

## Questions

Why, according to Newton's laws, can superman not fly?

What is the cross product of #[1, 4, -2]# and #[3, 0, 5] #?

The Gran Canyon Diablo Crater in Arizona is 200m, and was produced by an impact of a #3xx10^8 kg# meteorite traveling at #1.3xx10^4 m/s#. Estimate (a) the change in Earth’s velocity as a result of the impact and (b) the average force exerted on Earth?

A charge of #24 C# passes through a circuit every #18 s#. If the circuit can generate #16 W# of power, what is the circuit's resistance?

If an object is moving at #8 m/s# and accelerates to #32 m/s# over 6 seconds, what was the object's rate of acceleration?

An object with a mass of #5 kg# is pushed along a linear path with a kinetic friction coefficient of #u_k(x)= x^2-3x+6 #. How much work would it take to move the object over #x in [2, 3], where x is in meters?

A model train with a mass of #2 kg# is moving along a track at #2 (cm)/s#. If the curvature of the track changes from a radius of #7 cm# to #12 cm#, by how much must the centripetal force applied by the tracks change?

A stone is dropped from a helicopter hovering at a constant height of 490m. How long before the stone reaches the ground?

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?

What is the gravitational potential energy of a # 29 kg# object on a shelf # 5/6 m # high?

An object with a mass of #4 kg# is lying still on a surface and is compressing a horizontal spring by #1/4 m#. If the spring's constant is # 8 (kg)/s^2#, what is the minimum value of the surface's coefficient of static friction?

Why does a lake freeze at the top first, rather than throughout or at the bottom?

How does the law of conservation of energy relate to Hess' law?

An object with a mass of #5 kg# is hanging from an axle with a radius of #18 m#. If the wheel attached to the axle has a radius of #6 m#, how much force must be applied to the wheel to keep the object from falling?

An object with a mass of #6 kg# is revolving around a point at a distance of #8 m#. If the object is making revolutions at a frequency of #2 Hz#, what is the centripetal force acting on the object?

What is the electric current produced when a voltage of #9 V# is applied to a circuit with a resistance of #36 Omega#?

An object travels North at #15 m/s# for #2 s# and then travels South at #2 m/s# for #8 s#. What are the object's average speed and velocity?

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

A projectile is shot from the ground at an angle of #pi/4 # and a speed of #3 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?

If a projectile is shot at an angle of #pi/12# and at a velocity of #22 m/s#, when will it reach its maximum height??