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A 2.5 kg container of water sits on a scale A. A cube of aluminium with sides of length 9.0 cm is suspended from a spring scale B so that one sixth of the block is submerged in the water.
1. What is the reading (in N) on scale A?
2. What is the reading (in N) on spring scale B?
A proton ,a neutron and an alfa particle ,accelerated through the same potential difference ,enter a region of uniform magnetic field moving at right angles to B.(a) compare their kinetic energies .(b) if the radius of the proton’s circular path is 1..
If a rocket's exhaust speed is 160 m/s relative to the rocket, what fraction of its initial mass must be ejected to increase the rocket's speed by 50 m/s
A thin film of oil (n = 1.22) is located on smooth, wet pavement. When viewed from a direction perpendicular to the pavement, the film reflects most powerfully red light at 640 nm and reflects no light at 512 nm. What is the minimum thickness of the ..
What friction torque is required to reduce its angular speed from 80.0 to 51 in 27.
design of open channels - to protect cities from flooding during heavy rains open channels are sometimes constructed to
A spring is hung from the ceiling. When a coffee mug isattached to its end, it stretches 2.0 cm before reaching itsnew equilibrium length. The block is then pulled down slightly and released.
An Olympic long jumper leaves the ground at an angle of 19.8 ° and travels through the air for a horizontal distance of 6.79 m before landing. What is the takeoff speed of the jumper
Two stationary positive point charges, charge 1 of magnitude 3.10 nC and charge 2 of magnitude 1.74 nC, are separated by a distance of 36 cm. An electron is free from rest at the point midway between the two charges, and it moves along the line con..
An arrow is fired horizontally with a speed of 68. m/s directly at the bulls eye of a target 50 m away. When fired, the arrow is 120-m above the ground. How far short of the target does it strike the ground.
according to the bureau of labor statistics the average hourly wage in the us was 22.57 in may 2010. a random sample
question two equal point charges of magnitude 4.0 microc are situated along the x-axis at x1 -2.0 m and x2 -2.0 m.
You are watching an object that is moving in SHM. How much farther from this point will the object move before it stops momentarily and then starts to move back to the left
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