Search & Filtering
How much heat is required to raise the temperature of 125 g of water from 2.2 c degree to 48.6 c degree? The specific heat of water is 4.184 j g-1 c degree-1
An arrow is launched at a velocity of 20 m/s in a direction making an angle of 25° upward with the horizontal. (a) How long will it take to hit the ground? (b) How far from the cannon ball will it hit the ground? (c) Compute for maximum height to be reached by the cannon ball.
A cylinder of density ρo, length l, and cross-sectional area A floats in a liquid of density ρf with its axis perpendicular to the surface. The length h of the cylinder is submerged when the cylinder floats. Find an expression for the length h of the cylinder.
2. Since astronauts in orbit are apparently weightless, a clever method of measuring their masses is needed to monitor their mass gains or losses to adjust diets. One way to do this is to exert a known force on an astronauts and measure the acceleration produced. Suppose a net external force of 50.0 N is exerted and the astronaut's acceleration measured to be 0.893 m/s, (a) calculate her mass: (b) by exerting a force on the astronaut, the vehicle in which they orbit experiences an equal and opposite force. Discuss how this would affect the measurement of the astronaut's acceleration. Proposed a method in which recoil of the vehicle is avoided. Write your answers to the space provided below.
2. Since astronauts in orbit are apparently weightless, a clever method of measuring their masses is needed to monitor their mass gains or losses to adjust diets. One way to do this is to exert a known force on an astronauts and measure the acceleration produced. Suppose a net external force of 50.0 N is exerted and the astronaut's acceleration measured to be 0.893 m/s, (a) calculate her mass: (b) by exerting a force on the astronaut, the vehicle in which they orbit experiences an equal and opposite force. Discuss how this would affect the measurement of the astronaut's acceleration. Proposed a method in which recoil of the vehicle is avoided. Write your answers to the space provided below.
E=E0−β−2γcoska
Where E0,β and γ are constants and k is the wave vector.
The density of states of electrons (including spin degeneracy) in the band is given by
a) L/πγasin(ka)
b) L/2πγasin(ka)
c) L/2πγacos(ka)
d) L/πγacos(ka)
Using the impulse momentum theorem,
The question:
Suppose a player hits a ball of mass 0.145 kg with a racket, and that the velocity of the ball before hitting the racket is -38 m/s. Assuming the positive direction towards the pitcher, the initial momentum of the baseball is: pi=(0.145kg) (-38m/s) =--5.5kg.m/s .) What is the momentum of the ball after the collision? Apply the theory of impulse and momentum to find the final momentum
An antelope is being pulled by two forces whose vector-component expressions are: F1 = 6Ni + -3N) + -1.1 Nk F2 = -3.8Ni + 7.1 Nj + 2.8Nk What is the angle in degrees) between these two vectors?
#340153 on Dec 2023