Kara Merfeld

Numerade Educator

Biography

Numerade tutor dedicated to promoting a well-rounded education, I offer guidance across multiple subjects, encouraging students to embrace a diverse range of topics and develop a comprehensive understanding of the world

Education

Kara has not yet added their education credentials.

Educator Statistics

Numerade tutor for 7 years
449 Students Helped

Topics Covered

Calculating Electrical Power: Resistance and EMF
Master Direct Current Circuits with Our Expert Guide
Electromagnetic Induction: Understanding the Science and Applications
Mastering the Rotation of Rigid Bodies: Tips & Techniques
Explore the Fascinating Dynamics of Rotational Motion
Understanding Equilibrium and Elasticity: A Comprehensive Guide
Understanding Electric Charge and Field: A Comprehensive Guide
Understanding Gauss's Law: A Comprehensive Guide
Unlocking the Power of Electric Potential: Exploring its Benefits
Capacitance and Dielectrics: Understanding the Basics
Mastering Motion: Achieving Efficiency Along a Straight Line
Motion in 2d or 3d
Discovering the Fundamentals: Newton's Laws of Motion Explained
Mastering Newton's Laws: Tips for Applying Them Effectively
Find Your Dream Job: Discover the Best Work Opportunities
Unlock the Power of Kinetic Energy: Boost Your Efficiency Today
Calculate Area and Perimeter - Easy Online Tools
Maximize Your Results with Surface Area Optimization
Boost Your Business with High Volume Solutions
Circles: Exploring the Beauty and Significance of Circular Shapes
Unlocking the Power of Geometric Proof: A Comprehensive Guide
Unlock the Power of Logic: Boost Your Critical Thinking Skills
Understanding Electromagnetic Waves: A Comprehensive Guide
Functions
Mastering Polynomials: Essential Tips and Tricks | [Brand Name]
Rational Functions: Understanding Their Properties and Applications
Mastering Exponential and Logarithmic Functions: Your Ultimate Guide
Master Algebra Basics: Your Introduction to Algebra

Kara's Textbook Answer Videos

09:53
University Physics with Modern Physics

In the circuit shown in $\textbf{Fig. E26.31}$ the batteries have negligible internal resistance and the meters are both idealized. With the switch $S$ open, the voltmeter reads 15.0 V. (a) Find the emf $\varepsilon$ of the battery. (b) What will the ammeter read when the switch is closed?

Chapter 26: Direct-Current Circuits
Section 2: Kirchhoff's Rules
Kara Merfeld
04:49
University Physics with Modern Physics

A 0.800-kg ball is tied to the end of a string 1.60 m long and swung in a vertical circle. (a) During one complete circle, starting anywhere, calculate the total work done on the ball by (i) the tension in the string and (ii) gravity. (b) Repeat part (a) for motion along the semicircle from the lowest to the highest point on the path.

Chapter 6: Work and Kinetic Energy
Section 1: Work
Kara Merfeld
04:56
University Physics with Modern Physics

A large crate sits on the floor of a warehouse. Paul and Bob apply constant horizontal forces to the crate. The force applied by Paul has magnitude 48.0 N and direction 61.0$^\circ$ south of west. How much work does Paul's force do during a displacement of the crate that is 12.0 m in the direction 22.0$^\circ$ east of north?

Chapter 6: Work and Kinetic Energy
Section 1: Work
Kara Merfeld
05:13
University Physics with Modern Physics

On a farm, you are pushing on a stubborn pig with a constant horizontal force with magnitude 30.0 N and direction 37.0$^\circ$ counterclockwise from the +$x$-axis. How much work does this force do during a displacement of the pig that is (a) $\overrightarrow{s} = (5.00 \, \mathrm{m})\hat{\imath}$; (b) $\overrightarrow{s} = - (6.00 \, \mathrm{m})\hat{\jmath}$; (c) $\overrightarrow{s} = - (2.00 \, \mathrm{m})\hat{\jmath} + (4.00 \, \mathrm{m}) \hat{\jmath}$?

Chapter 6: Work and Kinetic Energy
Section 1: Work
Kara Merfeld
01:37
University Physics with Modern Physics

Adult cheetahs, the fastest of the great cats, have a mass of about 70 kg and have been clocked to run at up to 72 mi/h (32 m/s). (a) How many joules of kinetic energy does such a swift cheetah have? (b) By what factor would its kinetic energy change if its speed were doubled?

Chapter 6: Work and Kinetic Energy
Section 2: Kinetic Energy and the Work-Energy Theorem
Kara Merfeld
01:46
University Physics with Modern Physics

About 50,000 years ago, a meteor crashed into the earth near present-day Flagstaff, Arizona. Measurements from 2005 estimate that this meteor had a mass of about 1.4 $\times$ 10$^8$ kg (around 150,000 tons) and hit the ground at a speed of 12 km/s. (a) How much kinetic energy did this meteor deliver to the ground? (b) How does this energy compare to the energy released by a 1.0-megaton nuclear bomb? (A megaton bomb releases the same amount of energy as a million tons of TNT, and 1.0 ton of TNT releases 4.184 $\times$ 10$^9$ J of energy.)

Chapter 6: Work and Kinetic Energy
Section 2: Kinetic Energy and the Work-Energy Theorem
Kara Merfeld
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