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A worker pushed a 27kg block 9.2 m along a level floor atconstant speed with a force directed 32o below thehorizontal. If the coefficient of kinetic friction betweenblock and floor was 0.20, what were
a) the work done by theworker's force and
b) the increase in thermal energy of theblock-floor system?
A heat engine has an efficiency of 25%, and its heat input is 600 J per cycle from the high-temperature reservoir
q1. george of the jungle with mass m swings on a light vine hanging from a stationary tree branch. a second vine of
A grasshopper jumps a horizontal distance of 1.00 m from rest , with an initial velocity at 45.0 degree angle with respect to the horizontal. calculate the initial speed of the grasshopper
One afternoon, a couple walks three-fourths of the way around a circular lake, the radius of which is 3.00 km. What is the distance they travel
The current in a 100 watt lightbulb is 0.770 A. The filament inside the bulb is0.190 mm in diameter, What is the current density in the filament
The internal energy of a gas is 1000 J. The gas is compressed adiabatically, and its volume decreases by 500 cm3. what is the internal energy of the gas
The potential difference across a cell membrane from outside to inside is initially at -90 mV (when in its resting phase). How many ions move through the membrane
A rocket is fired straight up and accelerates upward at 12 m/s2 for 18 seconds. The rocket then runs out of fuel and coasts still going up. Ignore any air resistance effects on the rocket and use -9.8 m/s2 for the local acceleration due to gravity..
A uniform 13-kg trap door is oriented horizontally and hinged as shown. What is the magnitude of the torque on the door
A baseball is thrown straight up. The drag force is proportional to.In terms of, what is the y-component of ball's acceleration when its speed is half its terminal speed and it is moving up.
Suppose now that the apparatus is sealed, and the temperature rises to 56.4o C. Find the pressure inside the apparatus now
Explain the distinction between reimbursement grants and entitlements. Explain how does this distinction affect the way each type of grant is accounted for?
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