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On 20 July 1969, the astronauts of Apollo 11 placed a reflector on the surface
of the moon that with the telescope and electronic equipment on earth allows
measurements of the time of flight of laser pulses from earth to the moon and
back. Scientists are able to measure the time of flight of laser pulse from earth
to the moon and back with an accuracy of one nanosecond. What is the
accuracy of the distance to the moon distance?
Determine whether the flow is laminar or turbulent if glycerine at 25degC flows in a pipe with 150mm diameter. The average velocity of flow is 3.6m/s. (mass density = 1259 kg/m3; dynamic viscosity: 9.60 x 10^-1 Pa.s)
A flywheel of mass 15kg and a radius of 0.2m is mounted on a horizontal axle of radius 0.01m and negligible mass A force of 40N is applied tangentially to the axle.Find moment of inertia of the wheel,torgue, angular acceleration and angular velocity at the 10 s
A satellite is orbiting the Earth at a distance of 35 kilometers. The satellite has a mass of 500 kilograms. If the Earth has a mass of 5.97x1024 kilograms and a radius of 6.36x106 meters, what is the gravitational force between the Earth and the satellite?
Neurons are components of the nervous system of the body that transmit
signals as electrical impulses travel along their length. These impulses propagate
when charge suddenly rushes into and then out of a part of the neuron called axaon.
Measurements have shown that, during the inflow part of this cycle, approximately
3.6x10" Na+ (sodium ions) per meter, each with charge +e, enters the axon. How
many coulombs of charge enters a 1.59 cm length of the axon during this process
How physics relate to our daily Lives?
Give a situation in real life where physics apply, Or it can be mathematical problem where it can related to our daily lives.
How fast will an 800 kg car accelerates if it is pushed with 4,000 net of force
A car has an acceleration of 1m/s².What is the change in its velocity after every 3 seconds?
The van der Waals equation of state
(p+a/v²)(v-b) = RT
where a and b are constants. Its critical isotherm has a point of inflection at the criti cal point. (a) Show that these expressions for the constants must obtain: a = 9RTcvc/8 = 3pv², b = vc/3. (b) Compute the ap proximate values of the a and b for the fuel octane CsHis and compare results with values of a and b found in Item B 18.
There are required at least 20 kg of steam at 600 bar, 750°C to conduct an ex periment; a 140-L heavy duty tank is available for storage. Predict if this is adequate storage capacity using (a) the ideal gas theory, (b) the compressibility factor, (c) the van der Waa!'s equation, (d) the Mollier chart, Item B 16 (SI).
