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A particle moving in a straight line covers half the distance with speed of 3m/s. The other half of the distance is covered in two equal time intervals with speed of 4.5 m/s and 7.5 m/s respectively. The average speed of the particle during this motion is?
A large tree trunk is floating in the sea. The density of the sea water is 1040 kg/m3, What fraction of the trunk's volume is above the surface of the water
A spaceship of mass 1.90×10^6 kg is cruising at a speed of 4.50×10^6 m/s when the antimatter reactor fails, blowing the ship into three pieces. What is the speed of the third piece
The focal length of the human eye is approximately 1.7 cm. What is the f-number for the human eye in bright light, when the pupil diameter is 3.0mm
A person is exercising on an elliptical trainer at a steady VO2 of 3.92 l/min. Find what is this person mechanical power output
A Carnot engine takes in heat from a reservoir at 470°C and releases heat to the lower-temperature reservoir at 200°C. What is its efficiency.
Location A is 1.70 m to the right of a point charge q. Location B lies on the similar line and is 4.30 m to the right of the charge. The potential dissimilarity VB - VA =37.0 V. What is the magnitude and sign of the charge?
Determine the total amount of translational kinetic energy in a small classroom at normal room temperature. Suppose the room measures 5 meter by 12 meter by 3 meter
A magnetic field has a magnitude of 0.0011 T, and an electric field has a magnitude of 3.6 × 103 N/C. Both fields point in the same direction. A positive 2.3-?C charge moves at a speed of 4.1 × 106 m/s in a direction that is perpendicular to both fie..
What angle should the second rock be thrown to arrive at the same point as the first? How many seconds later should the second rock be thrown, after the first was thrown, to arrive at the same time?
Car C uses tires for which the coefficient of static friction is 1.1 on a particular unbanked curve. Find the maximum speed at which car B can negotiate the curve
A spherical surface completely surrounds a collection of charges. Find the electric flux through the surface if the collection consists of the following charges.
One afternoon, you are playing on a wooden basketball court with a hula-hoop to amuse yourself. find the hoop's speed just before it hits the wall
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