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what force is required to slow a 1250kg car traveling 115km/h to 30km/h within 3.50 s?
A) how far does the car travel during its deceleration?
B) how long does it take for the car to come to a complete stop at this same rate of deceleration?
An image of a biological sample is to have a resolution of 5 nm. (i) What is the kinetic energy of a beam of electrons with a de Broglie wavelength of 5.0nm.
A long pole is used to lift a window. If a vertical lift of 85 N is needed to raise the window, elucidate what force must be exerted along the pole? Assume the pole makes an angle of 49° with the vertical wall.
a horizontal circular platform rotates counterclockwise about its axis at the rate of 0.805 rad/s. You, with a mass of 67.3 kg, Calculate the total angular momentum of the system
A shell is fired wit ha horizontal velocity in the poxitive x direction from the top of an 80m hight cliff. Determine the initial speed of the shell
Planet Z is 12,000 km in diameter. The acceleration due to gravity on Planet Z is 7.0 m/s2.
Suppose the pressure in a container of soda is 15 atm. At 25oC, the Henry's Law constant for CO2 in water is 1.61 x 103 atm. Estimate the mole fraction of dissolved carbon dioxide in the soda
Two particles of equal mass m are at the vertices of the base of an equilateral triangle. What is the mass m' at the third vertex
She pumps the handle up and down, slowly lifting the car. What is the force exerted on the small piston during each downward stroke?
A stamp collector is viewing a stamp with a magnifying glass held next to her eye. What is the refractive power of a magnifying glass that has an angular magnification of 7.9 when the image of the stamp is located at the near point
An owl is chasing a squirrel and is using echolocation (the reflection of sound) to aid in the hunt. If the squirrel is 40.5 m from the owl, how long does it take sound to travel from the owl to the squirrel and then back to the owl? (Use 343m/s a..
Consider a gas of fermions at temperature T=0 in 3D space with dispersion law E(p) = v lpl^3 where v is a constant. calculate the Fermi energy and the ground energy
A 0.246-kg toy car is powered by three D cells (4.50 V total) connected directly to a small DC motor. The car has an effective energy conversion efficiency of 36.1%, What is the average current supplied to the car\'s motor?
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