Marinus Kenechukwu

Temple University
Teaching Assistant

Biography

An Aerospace Engineering PhD student with over two years of tutoring experience, teaches math and physics from middle school to college.

Education

BS Physics
Temple University

Educator Statistics

Numerade tutor for 4 years
221 Students Helped

Topics Covered

Breaking Limits: Unlock Your Potential with Our Expert Solutions
Exploring the World of Derivatives: A Comprehensive Guide

Marinus's Textbook Answer Videos

1

Marinus's Quick Ask Videos

01:43
Physics 101 Mechanics

A refrigerator has a coefficient of performance of K = 2.5. Each cycle, it absorbs 3.30 × 10^4 J of heat from the cold reservoir. The refrigerator is driven by a Carnot engine that has an efficiency of e = 0.5. How much mechanical energy is required each cycle to operate the refrigerator? Express your answer in joules to two significant figures. During each cycle, how much heat flows into the Carnot engine? Express your answer in joules to three significant figures.

Marinus Kenechukwu
04:23
Physics 101 Mechanics

Three people pull simultaneously on a stubborn donkey. Jack pulls directly ahead of the donkey with a force of 80.1 N. Jill pulls with 82.5 N in a direction 45° to the left, and Jane pulls in a direction 45° to the right with 173 N. (Since the donkey is involved with such uncoordinated people, who can blame it for being stubborn?) Find the magnitude of the net force the people exert on the donkey.
Magnitude of the net force in "N":
What is the direction of the net force in degrees? Express this as the angle from straight ahead between 0° and 90°, with a positive sign for angles to the left and a negative sign for angles to the right.

Marinus Kenechukwu
07:10
Physics 101 Mechanics

Please show all work clearly and provide formulas used. Thank
you!
Two birds traveling at right angle to each other, collide, and
hold on to each other during collision. The two birds have masses
4.83 kg and 7.34 kg. The smaller bird is traveling with the speed
14.6 m/s, and the larger bird is traveling with the speed 8.71 m/s.
What is the speed of the two birds after the collision, to two
decimal places? Hint: you need to make an assumption about the
birds' initial direction of travel.

Marinus Kenechukwu
07:29
Physics 101 Mechanics

1) Assume all batteries are ideal unless told
otherwise.
a) What is the voltage across six 3.0 VV batteries
when they are connected in parallel?
b) What is the voltage across six
3.0 VV batteries when they are connected four in parallel
with one another and this combination wired in series with the
remaining two?
c)What is the voltage across six 3.0 VV batteries when
they are connected in parallel?
2) A lightbulb's output is 60 W when it operates
at 120 V
a)If the voltage is cut in half and the power dropped to
21 WW during a brownout, what is the ratio of the bulb's
resistance at full power to its resistance during the brownout?
3)
a) How long would it take for a net charge of 2.1 C to
pass a location in a wire if it is to carry a steady current of
4.4 mA?
b) If the wire is actually connected directly to the two
electrodes of a battery and the battery does 29 JJ of
work on the charge during this time, what is the terminal voltage
of the battery?

Marinus Kenechukwu
08:39
Physics 101 Mechanics

You are designing a delivery ramp for crates containing exercise equipment. The 1550-N crates will move at 1.8 m/s at the top of a ramp that slopes downward at 22.0°. The ramp exerts a 515-N kinetic friction force on each crate, and the maximum static friction force also has this value. Each crate will compress a spring at the bottom of the ramp and will come to rest after traveling a total distance of 5.0 m along the ramp. Once stopped, a crate must not rebound back up the ramp.

Part A) Calculate the largest force constant of the spring that will be needed to meet the design criteria.
Express your answer with the appropriate units.

Marinus Kenechukwu
04:48
Physics 101 Mechanics

A water pump with a constant volume flow rate of 10.0 m^3/s is connected to a cylindrical pipe with a diameter of 0.500 m and a gauge pressure of 8.90×10^5 Pa at the floor of a building. What is the gauge pressure at the other end of the pipe located 20.0 m above the floor, having a diameter of 0.480 m?

Marinus Kenechukwu
1 2 3 4 5 ... 37