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a heavy box of school books (mass is 50kg) was set down at rest on an inclined street (theta = 30 degrees).
A) Draw a force Diagram of the box.
B) What are the magnitude and direction of the contact force on the box?
Using a 677-nm wavelength laser, you form the diffraction pattern of a 0.111-mm wide slit on a screen. How far is the screen located from the slit
The nucleus of an atom has a radius of about 5.1×10-15 m. The electron is normally at a distance of about 6.2×10-11 m from the nucleus, Find the volume of the nucleus
Illustrate what was the magnitude of the centripetal acceleration of the rock when it was on the string? (b) What was its speed when it was on the string?
Find the pressure at pump discharge, rate of flow of a pump, energy required by the pump, and size of the pump motor.
A car is driven 155 km west and then 75 km southwest. What is the displacement of the car from the point of origin (magnitude and direction).
An airplane flies 200 km due west from city A to city B and then 295 km in the direction of 35.5° north of west from city B to city C, In straight-line distance, how far is city C from city A
Influenced by the gravitational pull of a distant star, the velocity of an asteroid changes from from +21.0 km/s to ?17.8 km/s, What is the total change in the asteroid's velocity
On a 7.2 m length of string, you count 5 crests and 4 troughs. What is the wavelength of the waves on the string
An electron and a positron, each moving at3.0×105m/s, collide head on, disappear, Determine the momentum of each photon
A heater coil connected to a 220V ac line has a resistance of 42.1Ohm. What is the average power used, What is the maximum value of the instantaneous power
Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy, What is the orbital period of the faster planet, in years
A charge of -330e is uniformly spread through thevolume of a sphere of radius 1.95 cm. What is the volume charge density in that sphere
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