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Solve the gold density
1. p= 19300 kg÷ 1 m³
2. p=38600kg÷ 2 m³
Solve the water density at 4°C
1. p=2000kg ÷ 2 m³
2.p=4000kg÷ 4 m³
The centrifugal air compressor of a gas turbine receives air
from the ambient atmosphere where the pressure is 1 bar and
the temperature is 300K. At the discharge of the compressor,
the pressure is 4 bar and the temperature is 480K and the
velocity is 100 m/s. The mass flow rate of air is 15kg/s. (a)
Determine the power required to drive the compressor and
(b) Explain why the given air exit temperature is more or less
than the reversible adiabatic compression temperature.
you strike
a tuning fork and find that the first harmonic/fundamental resonance is produced when the air column length or height or depth
at 0.166 m. If the speed of sound is 340 m/s, what is the frequency of sound wave produced by the tuning fork in Hz?
You are making an electric circuit with a battery providing 3.0 V, and two resistors of resistance of 2.0 Ohm and 8.0 Ohm
connected in parallel to the battery. What is the current out of the battery in A?
knowing the potential difference across both resistors is 3.0 V, calculate the current going through the
2.0-Ohm resistor in A.
You connect an unknown resistor to a battery that can provide
the electric potential up to 10 V to form a closed loop circuit m8.5ade of the battery and the resistor. Using an
ammeter to measure the current coming out of the battery and using a voltmeter to measure the electric potential
difference across the resistor. In this experiment you vary the electric potential V provided by the battery from
0 V to 10 V in a step of 2 V. At each step you measure the current I out of the battery. When you plot V (V) vs.
I (A) on a graph, the data points spread evenly around a straight line whose slope is 8.5 V/A. Find the measured
resistance of the resistor in Ohm Keep at least two significant figures. No units are needed for the answer, and you
input just a numerical value for the specified units.
1.A 50 N force is applied to a 20 kg cart which was displaced at 150 m from rest on a surface applying an opposing force of 30N.
- Illustrate the free body diagram indicating all the forces acting on the cart.
- How much work is done on the cart?
- What is the final kinetic energy of the cart?
- How fast is the cart moving?
2.Explain your reasoning in each item briefly and concisely.
- Given the potential energy of a body, explain the relationship of the body’s mass and height.
Vector P has magnitude of 6 units in the direction of positive x-axis. Vector Q has a magnitude of 6√3 Units and lies in x-y plane, making an angle of 30° with positive x-axis and 60° with positive y-axis. Find the vector product of PxQ
An airplane starts traveling down a runway from rest for 4.0 seconds with an acceleration of 9.0 m/s2. What is the final velocity?
You are doing an experiment on the Ohm’s law. You connect an unknown resistor to a battery that can provide
the electric potential up to 10 V to form a closed loop circuit m8.5ade of the battery and the resistor. Using an
ammeter to measure the current coming out of the battery and using a voltmeter to measure the electric potential
difference across the resistor. In this experiment you vary the electric potential V provided by the battery from
0 V to 10 V in a step of 2 V. At each step you measure the current I out of the battery. When you plot V (V) vs.
I (A) on a graph, the data points spread evenly around a straight line whose slope is 8.5 V/A. Find the measured
resistance of the resistor in Ohm Keep at least two significant figures. No units are needed for the answer, and you
input just a numerical value for the specified units.
