Nica2t
2022-08-15
Answered

On average, a blink lasts about 104 ms. How far (inm) does a MiG-25 "Foxbat" fighter travel during a pilot'sblink if the plane's average velocity is 2220 mph?

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asked 2020-12-30

A majorette in a parade is performing some acrobatic twirlingsof her baton. Assume that the baton is a uniform rod of mass 0.120 kg and length 80.0 cm.

With a skillful move, the majorette changes the rotation ofher baton so that now it is spinning about an axis passing throughits end at the same angular velocity 3.00 rad/s as before. What is the new angularmomentum of the rod?

asked 2022-08-31

A 62.1kg mal ice skater is facing a 42.8kg female ice skater. they are at rest on theice they push off each other and move in opposite directions. The female skatermoves backwards with a speed of 3.11 m/s. determine the post-impulse speed of the male skater.

asked 2022-09-02

Bob sets the thermostat in his apartment to 68 degrees. The actual temperature in his apartment can vary from this by as much as 3.5 degrees. Write an absolute-value equation that you can use to find the minimum and maximum temperature. Then find the minimum and maximum (solve this equation)

asked 2021-01-13

A cubic block of wood, 10.0 cm on each side, floats at the interface between oil and water with is lower surface 1.50 cm below the interface. The density of oil is 790 kg/m(cubic). a) what is the gauge pressure on the upper surface of the block? b) what is the gauge pressure on the lower surface of the block? c) what is the mass and density of the block?

asked 2020-10-18

A 100g cube of ice at 0C is dropped into 1.0kg of water thatwas originally at 80C. What is the final temperature of thewater after the ice has melted?

$Q=\pm mL?$ or ?Qk=0 ???and ifso, how?

asked 2022-08-19

Suppose there is a U shaped frictionless skateboard ramp. If I put on far top left of the ramp and then release it until it reaches top left then from $\mathrm{\Delta}K={W}_{tot}=0$ because initial and final velocity is 0. I am quite confused that total work is zero. When I think in terms of ${W}_{tot}={\int}_{a}^{b}{\overrightarrow{F}}_{net}\cdot \overrightarrow{dr}$ I think the total work should be non zero because it seems that the force is always inclined with the dr direction. Why does it seems to be contradicting each other?

asked 2022-08-25

Two boats start together and race across a 60-km-wide lake and back. Boat A goes across at 60 km/h and returns at 60 km/h. Boat B goes across at 30 km/h, and its crew, realizing how far behind it is getting, returns at 90 km/h. Turnaround times are negligible, and the boat that completes the round trip first wins