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An instrument utilized for measurement the depth of oceans sends ultrasonic signals to the bottom of the ocean. The signal is received in 0.75 sec after the reflection from the bottom of the ocean. The freq of the signal is 60 KHz and the velocity of the ultrasonic signals in seawater is 1450m/s. Discover the depth of the ocean at the location of the experiment.
A crate pushed along the floor with velocity slides a distance after the pushing force is removed. what distance does the crate slide before stopping
A car driving at 20 m/s is approaching a stoplight. As the stoplight turns red, the driver decides that the car is going too fast to stop at the white line and hits the brakes hard. How fast was the car going when the driver changed the rate of dec..
photosynthesis by land plants leads to the fixation each year of about 1 kg of carbon on the average for each square
A child is trying to stack two uniform wooden blocks, 12 cm in length so they will protrude as much as possible over the edge of a table without tipping over, What is the maximum possible overhang distance
Three capacitors in series, with capacitance 3.0micro Farads,5.0 and 6.0 are connected in series to a 21.0V independent voltagesource. what charges are on the plates of each capacitor
What is force necessary on one end of apparatus in order to lift the car? How much work is done lifting the car?
q1. a sanding disk with rotational inertia 2.4 10-3 kgbullm2 is attached to an electric drill whose motor delivers a
A block of mass 0.14 kg is placed on a vertical spring of constant 5723 N/m and pushed downward, compressing the spring 0.08 m. What height above the point of release will the block reach
Soft drinks are commonly sold in aluminum containers. How many tons of aluminum does this represent
A loop of area 0.50 sq.m, lies on the table and contains 10 loops. The current of 8.10 A is clockwise. The Earth's magnetic field is 5.5*10^-5 T with a dip angle of 60 degrees. Decide the torque on the loop and its direction?
a what is the escape speed on a spherical asteroid whose radius is 510 km and whose gravitational acceleration at the
A skier of mass 120 kg starts from rest at the top of the ski slope of height 100 m, find the skier's speed when he reaches the bottom of the slope
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