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A 2500 kg delivery truck contains 125 cavans of rice, each of mass 50 kg. It is moving at a speed of 5.0 m/s. How many cavans of rice must be unloaded at a nearby grocery so that the ruck can move at 9.0 m/s and yet maintain the same momentum?
A battery powered toy car accelerates from 0.0 m/s to 8.5 m/s. It’s mass is 0.55kg. The chemical store in its battery is decreased by 30J. Calculate the efficiency of this process
The circuit in the Figure 1 below has been connected for several
seconds. Find the current;
3.1. in the 4.00-V battery,
3.2. in the 3.00-V resistor,
3.3. in the 8.00-V battery, and
3.4. in the 3.00-V battery.
3.5. Find the charge on the cap
is the Earth a closed or open system(thermodynamics)
The period of a helical spring is given by T = 2π. assume that e = 50.0 ± 0.2cm(s.e). If time for 15 oscillations are as recorded below 24.2, 24.2, 24.7, 24.5, 24.2, 24.2, 24.2, 24.4, 24.5, 24.6, 24.7, 24.5, 24.6, 24.5, 24.3. Determine the value of g and the standard error in g.
One-dimensional crystal assembled from three identical atoms connected to one another and to the walls by identical springs. Find the normal modes of the given system. Plot the relative displacements versus time for all three normal modes.(consider the connection as wall-spring-atom1-spring-atom2-spring-atom3-spring-wall).
How much joules of heat will it take to increase the temperature of 6kg water 5 k ?
By considering the principles that the distribution of current in a circuit is the result of charge conservation, and the distribution of potential differences in a circuit is the result of energy conservation, derive:
(a) the combined resistance of two resistors R1 and R2 connected in series
(b) the combined resistance of two resistors R1 and R2 connected in parallel
Calculate the speed it takes a celestial particle to move from Jupiter to Pluto.
If the velocity of a particle is zero, can its acceleration be nonzero?
