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A bus starts from rest at a station and accelerates at a speed rate of 2m/s^2 for 15 seconds. It then runs at a constant speed for 25 seconds and slows down at -3m/s^2 until it stops. Find the total displacement travelled by the bus

Show that if the temperature on the Celsius scale changes



by TC, the Fahrenheit temperature changes by TF -




(9/5)TC.




A bus driver forgot to stop at a bus stop. Just as he passes the stop, he begins to decelerate 5 seconds later, the bus is 80m beyond the stop and has slowed to 10m/s.



a. Calculate the speed of the bus as it passed the bus stop.



b. What is the deceleration of the bus?

A bus starts from rest at a station and accelerates at a speed rate of 2m/s^2 for 25 seconds. It then runs at a constant speed for 25 seconds and slows down at -3m/s^2 until it stops. Find the total displacement travelled by the bus.

Estimate the number of impacts that air molecules make with the palm of your hand each second, assuming that all air consists entirely of nitrogen (molar mass=0.028kg)?



Find the angle between the two vectors A=2.00i+3.00j+1.00k and B=4.00i+2.00j-1.00k


A block of mass 2 kg is attached to a string that will break if the tension exceeds 500 N. If the block is whirled in a horizontal circle of radius 0.5 m, its maximum speed will be


Miss Y agreed to keep a request from her friend to cook rice in an aluminium pot.A metal cover was used on the top of the aluminium pot during cooking,but after a short-while the metal cover was fallen down.They involved in a debate to explain it using a theorem of physics why the metal cover has been fallen down from the top of the aluminum pot.Miss Y said that it was due to be produced pressure but her friend agreed on it to some extent and also asked about the conversion of energy, demanding to show the expression for the theorem.Could you please help Miss Y?

A steady flow, steady state thermodynamic system receives 45 kg/min of a fluid at 207kPa and discharges it from point 24 m. above the entrance section at 1034 kPa. The fluid enters with a velocity of 36.6 m/s and leaves with a velocity of 12 m/s. During this process, there are supplied 7 kW of heat from an external source, and the increase in enthalpy is 4.6 kJ/kg.


An indoor heater operating on the Carnot cycle is warming the house up at a rate of 30 kJ/s to maintain the indoor temperature at 72 ºF. What is the power operating the heater if the outdoor temperature is 30 ºF?


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