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Q. A rectangular container measuring 24 cm 48 cm 55 cm is filled with water. What is the mass of this volume of water in kilograms?
Q. 5000 kg helicopter accelerates upward at 0.50 m/s^2 while liftinga 2000kg car.
A. what is the lift orce exerted on the air by the rotors?
B. what is the tension in the cable (ignore its mass) that connects the car to the helicopter?
A 1050kg car carrying four 78kg people travels over a rough "washboard" dirt road with corrugations 4m apart which causes car to bounce on its spring suspension.
A bus travelling along the straight road at 100km/hr-1 and the bus conductor make at 6kmhr-1 on the floor of the bus in the same direction on the bus. Find the speed of the conductor relative to road and relative to the bus. If the bus conductor now ..
The parallel metal plate of a capacitor is detached by a distance of 0.5cm and is connected to a 90v battery. Find the electric field between them and surface charge density on the plate.
The magnitude of earth's magnetic field is 50.0 µT and makes an angle of 30° with the plane of the coil. Assume a patient takes 1.50 s to inhale, find the magnitude of average induced emf in the coil during that time.
Two 10 cm long thin glass rods uniformly charged to + 10;{rm nC} are placed side by side, 4cm apart. What are the electric field strengths E_1, E_2, and E_3 at distances 1.0 cm, 2cm, and 3cm to the right of the rod on the left, along line connecti..
What is the speed of projectile immediately before it hits the ground if air friction does one and a half times as much work on projectile when it is going down as it did when it was going up.
An ion source is producing 6Li ions, which have mass 9.99 x10-27 kg and charge +e. The ions are accelerated by a potential difference of 30 kV and pass horizontally into the region in which there is a uniform vertical magnetic field of magnitude B..
If the accelerating plates are 1.60 apart, and have a potential difference of 2.60×10^4, what is the magnitude of the uniform electric field between them.
An electric wire that has a mass of 5 kg for a 20m length is strung between two poles 20 m apart. What should be the tension in the wire if it is to take 0.8 seconds for a pulse to travel along the wire from one pole to the other.
A passenger train is travelling at 31 m/s when the engineer sees a freight train 351 m ahead of his train travelling in the same direction on the same track. The freight train is moving at a speed of 5.6 m/s.
If it takes 3 golf balls to equal the mass of one tennis ball, what weight of tennis balls do you require equalling the number of golf balls in one kilogram of golf balls.
A frictionless pulley has the shape of a uniform solid disk of mass 4.00 kg and radius 28.0cm. A 3.60 kg stone is attached to a very light wire that is wrapped around the rim of the pulley, and the stone is released from rest. As it falls down, the w..
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