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A small motor boat travels with speed of 3 meters per second relative to the water. A boater directs his boats so that his velocity relative to warer makes a 30 angle with respect to the x axis as shown.The water of the river has a velocity of 0.4m/s in the y direction relative to land. the river is 40 m wide.
1) when the boat reaches the opposite shore, how much is th boat displaced in y from its initial position ?
2) the boater instead directs his 3m/s velocity vector so that the boat arrives at the same y voordinate as it started from. how does the times it takes to cross the river with this heding compare to the previous case ?
a) the crossing time is smaller than before
B) the crossing time is the same as before
C) the crossing time is larger than before
A hollow cylindrical copper pipe is 1.40m long and has an outside diameter of 3.90cm and an inside diameter of 2.60cm . How much does it weigh
Calculate the change in the melting point of naphthalene for one atmosphere rise in pressure given that its melting point is 80 C. Latent heat of fusion is 4563 cal/mol and increase in volume on fusion is 18.70 cm3 per mol and 1 calorie = 4.2×10^7..
The speed of an ion in a particle accelerator is doubled from 0.4500c to 0.9000c. The particle's initial relativistic momentum is 472.819 MeV/c. Find the magnitude of its final relativistic momentum
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Find out the angle that the total acceleration of the car. the car at the moment the car completes the circle.
A child whose mass is 40 kg obstruction is on the 3rd floor of the building at a height of 15 m above the ground. Calculate the potential energy of the child if the child is now located on the 5th floor and is located 25 m from the ground!
The inductance of a solenoid with 460 turns and a length of 23cm is 7.5mH. What is the cross-sectional area of the solenoid
A standing observer perceives a train whistle to have a frequency of 300 Hertz. obtain the frequency of sound waves emitted from the train
A bullet of massm = 15 g and velocity 260 m/s is shot into a block of wood that is firmly attached to the ground. What was the acceleration of the bullet
A force vector has a magnitude of 584 newtons and points at an angle 45o of below the positive x axis. What are (a) x scalar component and (b) y scalar component of the vector.
An object is placed 45 cm from a concave mirror of radius 92 cm. (a) Find the location of the image. (Enter in cm. Use a negative number if the image is behind the mirror) cm (b) What is the magnification of the mirror? Is the image real or virtual? ..
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