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A 8.0 kilogram object undergoes an acceleration of 2.7 m/s2.
(a) Find the magnitude of the resultant force acting on it?
(b) If this same force is applied to a 16.0 kg object, determine what acceleration is produced?
Bats emit sounds of frequencies around 35.0 kHz and useecholocation to find their prey. If a bat is moving at the speed of12.0 m/s toward an insect at an air temperature of20.0oC. What frequency is heard by the bat from the reflectedsound?
A block of mass 20m can move without friction on a horizontal table. find the magnitude of the acceleration of the descending block
Place a 2kg textbook against a vertical wall and press on it with a force of 40 N. determine the acceleration of the textbook
A 5.7 g bullet leaves the muzzle of a rifle with a speed of 326 m/s. What force (assumed constant) is exerted on the bullet while it is traveling down the 0.85 m long barrel of the rifle
A second baseman tosses the ball to the first baseman, who catches it at the same level from which it was thrown. How long is the ball in the air
A crate is sliding down a ramp that is inclined at an angle of38.0o above the horizontal. Find the acceleration of the moving crate
A constant retarding torque of 15 m·N stops a rolling wheel of diameter 0.50 m in a distance of 21 m. How much work is done by the torque
A 120 V potential difference is applied to a space heater whoseresistance is 12 Ω when hot. (a) At what rateis electrical energy transferred to thermal energy?(b) What is the cost in cents for 6.0 h at US5.0¢/kW·h?
In the semiconductor industry, an insulating layer can be built onto silicon devices by oxidizing the silicon to form silica, SiO2, Write down a balanced equation for the reaction between silica and HF.
High speed stroboscopic photographs show that the head of a 246 g golf club is traveling at 56.2 m/s just before it strikes a 47.0 g golf ball at rest on a tee. Find the speed of the golf ball just after impact
An LRC series circuit with R = 100 Omega, L = 56mH, and C =1.7 muF is powered by an ac voltage source of peak voltage V0 = 210 V, Determine the phase angle of the source voltage relative to the current
The acceleration of a particle is defined by the relation a =-k√v where k is a constant the particle starts at time t = 0sand the postion s = 0 m with a velocity of 25 m/s. determine the time required for the particle to come to rest
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