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an 15.0-kg box is released on a 35.0 incline and accelerates down the incline at 0.290m/s^2
a) Find the friction force impeding its motion?
b) how large is the coefficient of kinetic friction?
A line in the x-ray spectrum of gold has a wavelength of 18.5 pm(=18.5x10^12 m), What is the energy of the lower stationary state
Light of wavelength 619 nm is incident normally on a diffraction grating. Two adjacent maxima occur at angles given by sin ? = 0.20 and sin ? = 0.32. The fourth-order maxima are missing, What is the separation between adjacent slits
If the circular surface of the upper end of the rod is maintained at 290 K, what is the approximate boil-off rate of liquid helium after the lower half has reached 4.20 K
An electric generator has a 20-turn coil of area 0.04 m2 rotating uniformly at 60 rev/s in a magnetic field of 1.0 T, Calculate the peak value of the induced voltage
An electron is moving at a speed of 1.0 x10^4 m/s in a circular path of radius of 2.1cm inside a solenoid. The magnetic field of the solenoid is perpendicular to the plane of the electron's path. The solenoid has 25 turns per centimeter.
A submarine is 309 m horizontally out from the shore and 149 m beneath the surface of the water. find the height of the building
A quarter (diameter = 2.40 cm) is held at arm's length (64.0 cm). What is the ratio of the angular size of the quarter to that of the sun
what force is required to slow a 1250kg car traveling 115km/h to 30km/h within 3.50 s? how far does the car travel during its deceleration
Four Identical masses of 500.0g are placed at the corners of a square, distance 0.50 m apart. Find the magnitude of net gravitational force exerted by three masses
Three point charges are on the x axis: q1 is at the origin, q2 is at x = 4.91 m, and q3 is at x = 6.21 m. Find the electrostatic potential energy of this system of charges if q1 = q2 = q3 = 1.55 C.
A child, hunting for her favourite horse, is running on the ground around the edge of a stationary merry-go-round. The angular speed of the girl has a constant value of .250 rad/sec.
A car is traveling at 95.0 km/hr when it collides with a stone wall. The car comes to rest after the first 30.0 cm of the car is crushed. what would the average force acting on the driver
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