If a planet exists whose mass is twice that of the earth and whose radius is three times that of the earth, a1 kg mass on its surface would weight about
A 120 m long train is moving in a direction with speed 20 m/s.A train B moving with 30 m/s in the opposite direction and 130 m long crosses the first train in a time
A ball of mass m moving with uniform speed collides elastically with another stationary ball.The incident ball will lose maximum kinetic energy when mass of the stationary ball is:
A mental wire is stretched by suspending weight to if x is the longitudinal strain and y is young s modulus of elasticity then the elastic potential energy per unit volume is
Surface and ground water sources are contaminated by various human activities. Which of the following is not a human activity that cause contamination of fresh water?
Intermolecular forces exist between molecules of group 7 elements which of the following sequence represents the strength of the intermolecular forces?
Increased awareness of environment issues has led chemist to develop products and processes that do not impact on the environment in terms of pollution or depletion of sources. To help chemist to achieve this aim, some principles are drawn, which one is not the guiding principle
Methyl mercaptan, CH3SH, is one of the substances responsible for bad breath and is often used to impart a smell to natural gas in a pipeline. What will be formed when CH3SH is burned in an excess of air?
Hydrolysis of protein by 6M HCl gives peptides and then alpha-amino acids. How many alpha-amino acids molecules are obtained on the hydrolysis of a tetrapeptide
The text as we have them were written down and edited carefully by Christians proud of their ancestors but unable to bear the thought of their indulging in heathen practices; thus, all references to the ancient religion of the Celts were ______, if not ______
Since they shared so much when they were growing up Elizabeth and Sarah have cultivated a very special friendship and even now confide their most intimate thoughts only to one another
The newest fiber optic cables that carry telephone calls cross. country are made of glass so ______ that a piece 100 miles thick is clearer than a standard windowpane
The hubble space telescope will search for planets around other stars, a key to the ___________ for extra terrestrial life, and examine interstellar dust and gases out of which stars are born.
Her novel published to universal acclaim, her literary gifts acknowledged by the chief figures of the Harlem Renaissance, her reputation as yet ______ by envious slights, Hurston clearly was at the ______ of her career
In one shocking instance of ______ research, one of the nation's most influential researchers in the filed of genetics reported on experiments that were never carried out and published deliberately ______ scientific papers on his nonexistent work.
