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1

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"When the speed of a rear-drive car is increasing on a horizontal road the direction of the frictional force on the tires is: "

"A. forward for all tires B. backward for all tires C. forward for the front tires and backward for the rear tires D. backward for the front tires and forward for the rear tires E. zero"
26/02/2013

1

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"A forward force on the axle accelerates a rolling wheel on a horizontal surface. If the wheel does not slide the frictional force of the surface on the wheel is: "

"A. zero B. in the forward direction C. in the backward direction D. in the upward direction E. in the downward direction"
26/02/2013

1

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"Two wheels roll side-by-side without sliding, at the same speed. The radius of wheel 2 is twice the radius of wheel 1. The angular velocity of wheel 2 is: "

"A. twice the angular velocity of wheel 1 B. the same as the angular velocity of wheel 1 C. half the angular velocity of wheel 1 D. more than twice the angular velocity of wheel 1 E. less than ...
26/02/2013
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5

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Rationalize why chalk (calcium carbonate) has a higher melting point than motor oil (large compound made from carbon and hydrogen), which has a higher melting point than water and engages in relatively strong hydrogen bonding interactions.

Answered: A hydrogen bond will be the electromagnetic attractive interaction between polar molecules, where hydrogen will a highly electronegative atom, for instance nitrogen, oxygen or fluorine
09/07/2014

2

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If conditions are not favourable than how Nostoc would reproduce?

Answered: Nostoc is often a genus of cyanobacteria within a number of environmental niches that forms colonies consisting of filaments of moniliform cells in a gelatinous sheath. The name Nostoc was coined...
14/04/2014

3

Answers

How elementary canal bacteria are useful?

Answered: Bacteria isolated from the digestive tract of the pea aphid, Acyrthosiphon pisum, were identified mainly as varieties of the genera Sarcina, Micrococcus, Achromobacter, and Flavobacterium. Starch...
14/04/2014

7

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Define basic impulse insulation level (BIL) ?

Answered: "The Basic Impulse Insulation Levels refers to the ability of electric equipment such as transformers to withstand lightning surges. When lightning strikes a transmission line, a traveling wave is ...
29/09/2012

8

Answers

Explain the term baud.

Answered: "Contrary to popular belief, baud is not a direct measurement of data transfer speed, but instead it measures how many electrical signals are sent per second. Baud is used to measure the rate of ...
29/09/2012

8

Answers

What is a Bayesian estimation?

Answered: "Suppose an unknown parameter θ is known to have a prior distribution . Let be an estimator of θ (based on some measurements x), and let be a loss function, such as squared error. The Bayes risk ...
29/09/2012

8

Answers

Why is beamforming also termed as spatial filtering?

Answered: "Beamforming or spatial filtering is a signal processing technique used in sensor arrays for directional signal transmission or reception.[1] This is achieved by combining elements in a phased ...
29/09/2012

7

Answers

What is an autotransformer? Where are they most suited?

Answered: "A transformer is a power converter that transfers electrical energy from one circuit to another through inductively coupled conductors—the transformer's coils. A varying current in the first or ...
29/09/2012

8

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Define an auxiliary relay with examples.

Answered: " An auxiliary is a person who is employed to assist other people in their work. Auxiliaries are often medical workers or members of the armed forces. "
29/09/2012

8

Answers

What is meant by azimuth recording? Where is this recording scheme used?

Answered: However, if the heads are mounted at slightly different angles (such as ±7 degrees in VHS), destructive interference will occur at high frequencies when reading data recorded in the cross-talking ...
29/09/2012
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