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in intergalactic space there is an average of one hydrogenmolecule per cm3 and the temperature is 3k calculate the
the mass density of crystalline carbon diamond is 350times103kgm3 calculate the number density of carbon atoms per
a pendulum is made of a long narrow stainless steel rod and has aperiod of t seconds at -2000 degrees c if the
calculate the ratio of the drag force on a jet flying at 899kmh at an altitude of 78 km to the drag force on a
a train engine weighs 5 times as much as aflatbed car if the engine coasts at 3 kmhr into the boxcar that is initially
the alveoli in the lungs have an average radius of 0125 mm and areapproximately spherical if body temperature is 370
a persons face is 30cm ini front of a concave shaving mirror if the image is an erect image 15 times as large as the
a single-turn plane loop of wire with a corss-sectional area 200cm2 is perpendicular to a magnetic field that increases
suppose the coefficient of static friction between the road and the tiers on a car is 060 and the car has no negative
two circular coils of current-carrying wire have the same magnetic moment the first coil has a radius of 0091 m 120
a velocity selector has an electric field of magnitude 2500 ncdirected vertically upward and a horizontal magnetic
in the operating room anesthesiologists use mass spectrometers tomonitor the respiratory gases of patients undergoing
two identical long wires of radius a 172 mm are parallel and carry identical currentsin opposite directions their
a beam of polarized light with an average intensity of 148 wm2 is sent through a polarizer the transmission axis makes
the average intensity of light emerging from a polarizing sheet is 0767 wm2 and the average intensity of the
the electromagnetic wave that delivers a cellular phone call to acar has a magnetic field with an rms value of 150
two astronauts are 10 m apart in theirspaceship one speaks to the other the conversation is transmitted to earth via
a positively charged object with a mass of 0114 kg oscillates at the end of a spring generatingelf extremely low
a flat coil of wire is used with an lc-tuned circuit as a receiving antenna the coil has a radius of 015 mand consists
a horizontal spring is lying on a frictionless surface one end ofthe spring is attached to a wall whle the other end is
a car is hauling a 88 kg trailer to whichit is connected by a spring the spring constant is 2150 nm the car accelerates
two identical resistors are connected in parallel across a 27-vbattery which supplies them with a total power of 65 w
abullet emerges from the muzzle of a gun with a velocity of 300ms the net force on the bullet while it is in the gun
if energy were conserved in each collision what would you expect the ratio of the total kinetic after the collision to
a series circuit contains a 300 h inductor a 260 microf capacitor and a 200 resistorconnected to a 120 v rms source of