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Q. A boat moves relative to water with a velocity which is n =2 times less than the river flow velocity. At what angle to the stream direction must the boat move to minimize drifting?
Q. A 70 g bullet traveling at 250 m/s penetrates a block of ice at 0 C and comes to rest within the ice.
Assuming that the temperature of the bullet doesn't change appreciably, how much ice is melted as a result of the collision?
What is the kinetic energy of α particle while it reaches the other plate? The distance between the plates is 33 cm.
If an astronaut can throw a certain wrench 14 {rm m} vertically upward on earth, how high could he throw it on our moon if he gives it the similar starting speed in both places.
W hat is the magnitude of an average force exerted on the superball by the sidewalk. what is force caused by the water on the bottom.
A ship sets out to sail to a point 148 km due north. An unexpected storm blows the ship to a point 148 km due east of its starting point. (a) How far (in km) and (b) in what direction (as an angle from due east, where north of east is a positive angl..
A thin rod consists of two parts joined together. One third of it is silver and two-thirds is gold. The temperature decreases by 24C°.
At t=0 a grinding wheel has an angular velocity of 30.0 rad/s. It has a constant angular acceleration of 31.0 rad/s^2 until a circuit breaker trips at time t = 2.00 s. From then on, it turns through an angle 428 rad as it coasts to a stop at constant..
Use Gauss law to compute amount of charge
Find out the tension of the right and left wire
The electric field everywhere on the surface of a thin spherical shell of radius 0.780m is measured to be equal to 940 N/C and points radially toward the center of the sphere.
Calculate the total cost ($/kWh) of electricity delivered to the grid including fuel cost and debt charge with O&M of 5% added to the total.
A car is travelling with a velocity of + 88.0 km/h. It accelerates at a constant rate of 20 m/s2. If the acceleration lasts for 5.6s, what is the final velocity of the car.
A helium-neon laser intended for instructional use operates 7.5 mW. Find out the maximum value of the electric field at a point where the cross sectional area of beam is 10 mm.
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