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Compare the gravitational force of attraction on a 1.0 kg object when it is at the surface of the moon to the gravitational force on the same object when it is at the surface of the Earth. (Mass of the moon = 7.35 x 10 22 kg, radius of the moon = 1.738 x 106 m ; mass of the Earth = 6 x 10 24 kg, radius of the Earth = 6.4 x 106 m)
Compare the gravitational force of attraction on a 1.0 kg object when it is at the surface of the moon to the gravitational force on the same object when it is at the surface of the Earth. (Mass of the moon = 7.35 x 10 22 kg, radius of the moon = 1.738 x 106 m ; mass of the Earth = 6 x 10 24 kg, radius of the Earth = 6.4 x 106 m)
Find the resultant and direction of 15n and 20n acting with the horizontal
A woman on the earth firecracker explode 10.0m in front of her when her clock reaches 5.0 seconds an astronaut in rocketship who passes the woman on earh at t=0 at speed of 0.40c. Find what coordinate for this event?
Sand from a stationary hopper falls on a moving conveyor belt at the rate of 7.64 kg/s, as shown in the figure. The belt is supported by frictionless rollers and moves at 0.466 m/s under the action of a horizontal external force supplied by the motor that drives the belt.
a) Find the sand’s rate of change of momentum in the horizontal direction. Answer in units of N.
b) Find the frictional force exerted by the belt on the sand. Answer in units of N.
c) Find the magnitude of the external force supplied by the motor. Answer in units of N
d) Find the work done by the external force each second. Answer in units of J.
e) Find the kinetic energy acquired by the falling sand each second due to the change in its horizontal motion. Answer in units of J
A particle of mass M1 moving with inertial velocity Vo is incident on a stationary particle of mass M2. After collision, M1 was deflected through an angle ∅ and M2 an angle ∅. If the velocities of the particles after collision were V1 and V2 respectively. Show that for elastic collision;
(a) V2=V2o.M1/M1+M2.cos∅
(b) (V1/Vo)=2(V1/Vo)M1/M1+M2.cosx+M2-M1/M1+M2
(c) M2/M1=sin/sin(∅+x)
A 40-kg trunk sliding forward across a floor slows down from 5.0 to 2.0 m/s in 6.0 s. Assuming that the force acting on the trunk is constant, what is its magnitude and direction?
Complete the following reactions and write their mechanisms:
(i) CH3COCH3 + CH3MgBr in the presence of ether/ H₂O -----> ??
(ii) CH₃COCH₃ + Br₂ in the presence of (OH⁻)---> ??
The blood was flowing out from the heart at the speed of 0.45 m/s through aorta. The diameter of aorta is 1.6 cm. The aorta was splitted into a number of tiny blood vessels. The blood flows through the vessels to various organs with the speed of 5 x 10-5 m/s. If the diameters of the blood vessels are 99.95% smaller than diameter of aorta and the blood is incompressible. Calculate the number of blood vessels in human body by assuming that all the blood vessels have similar diameter.
ONE GRAM OF GOLD CAN BE BEATEN OUT INTO A FOIL 1.O M2 IN AREA. HOW MANY ATOMS THICK IS SUCH A FOIL? THE MASS OF GOLD ATOM IS 3.27 x 10-25 KG , DENSITY OF GOLD 1.9 X 104 KG.
