Get college assignment help at uniessay writers A baseball player hits a ball towards the outfield with an initial velocity of 76.0 m/s at an angle of 45.0 relative to the ground. The outfield is 118 m away and is 4.0 m tall. a) Does the ball clear the fence for a homerun? (find the height when the ball is 118 m away)
To help prevent frost damage, fruit growers sometimes protect their crop by spraying it with water when overnight temperatures are expected to go below freezing. When the water turns to ice during the night, heat is released into the plants, thereby giving a measure of protection against the cold. Suppose a grower sprays 6.3 kg of water at 0°C onto a fruit tree. (a) How much heat is released by the water when it freezes? J (b) How much would the temperature of a 187-kg tree rise if it absorbed the heat released in part (a)? Assume that the specific heat capacity of the tree is 2.5 103 J/(kg · C°) and that no phase change occurs within the tree itself. °C
Two narrow slits separated by 0.51 mm are illuminated by monochromatic light of wavelength 670 nm. How many bright fringes can be seen on a screen 1.3 cm wide placed 1.1 m in front of the slits?
Two metal spheres, each weighing 24.0 kg are placed 0.0500 m apart. Calculate the magnitude of the gravitational force the two spheres exert on each other.
A diving board length = 5.00 that weighs 250 is supported by two pillars. One pillar is at the left end of the diving board, as shown below; the other is distance = 1.70 away .
A 73-kg skier is going down a slope oriented 36° above the horizontal. The area of each ski in contact with the snow is 0.13 m2. Determine the pressure that each ski exerts on the snow.
A 45.5-cm diameter disk rotates with a constant angular acceleration of 2.0 rad/s2. It starts from rest at t = 0, and a line drawn from the center of the disk to a point P on the rim of the disk makes an angle of 57.3° with the positive x-axis at this time.
A 215-kg crate is pushed horizontally with a force of 705 N. If the coefficient of friction is 0.20, calculate the acceleration of the crate.
wo astronauts, one of mass 60 kg and the other 82 kg, are initially at rest in outer space. They then push each other apart. How far apart are they when the lighter astronaut has moved 12 m?
Apply Faraday’s Law to show that the static electric field between the plates of a parallel-plate capacitor cannot drop abruptly to zero at the edges but must, in fact, fringe.
Get college assignment help at uniessay writers A string under a tension of 59 N is used to whirl a rock in a horizontal circle of radius 3.3 m at a speed of 16.2 m/s. The string is pulled in, and the speed of the rock increases. When the string is 1.158 m long and the speed of the rock is 78.3 m/s, the string breaks. What is the breaking strength of the string?
A 10.3 kg object starting from rest falls through a viscous medium and experiences a resistive force R = −b v, where v is the velocity of the object. The acceleration of gravity is 9.8 m/s2 . If the object’s speed reaches one-half its ter- minal speed in 5.045 s, determine the terminal speed. Answer in units of m/s.
Please help me with these three questions. Thanks
A 295 Kg piano slides 4.1 m down a 30 degree incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is .40. A) calculate the force exerted on the man B)calculate the work done by the man on the piano C)calculate the work done by the friction force D)Whit is the work done by the force of gravity? E) what is the net work done on the piano
In the figure below, a uniform sphere of mass m = 1.40 kg and radius r = 2.8 cm is held in place by a massless rope attached to a frictionless wall a distance L = 12.0 cm above the center of the sphere.
An athlete at the gym holds a 1.8 kg steel ball in his hand. His arm is 74 cm long and has a mass of 4.0 kg. What is the magnitude of the torque about his shoulder if he holds his arm straight out, parallel to the floor.
A projectile is fired at an upward angle of 45° from the top of a 223 m cliff with a speed of 220 m/s. What will be its speed when it strikes the ground below? (Use conservation of energy.)
An electric dipole with dipole moment is oriented along the y-axis.Find an expression for the electric potential on the y-axis at a point where is much larger than the charge spacing . Write your expression in terms of the dipole moment. Express your answer in terms of , and appropriate constants.
A 40 N toy is placed in a light swing that is attached to ropes 2.7 m long. (a) Find the gravitational potential energy associated with the toy relative to its lowest position when the ropes are horizontal. 1:___________J (b) Find the gravitational potential energy associated with the toy relative to its lowest position when the ropes make a 30° angle with the vertical. 2:______J (c) Find the gravitational potential energy associated with the toy relative to its lowest position at the bottom of the circular arc. 3 _______J
“Apply Faraday’s Law to show that the static electric field between the plates of a parallel-plate capacitor cannot drop abruptly to zero at the edges but must, in fact, fringe. ” …. It is a complete question! Parallel plate capacitors have the same E-field…. Perhaps you are inquiring about the length?! We are to use “L” for some arbitrary length. I wish YOU would be more specific as to what you want me to clarify! Frankly, when IIII try to solve this, when I take the limit as L–> infinite, I get that the e-field DOES go to zero when trying to use Faraday’s law. So…
Two banked curves have the same radius. Curve A is banked at an angle of 12.3°, and curve B is banked at an angle of 19.2°. A car can travel around curve A without relying on friction at a speed of 17.0 m/s. At what speed can this car travel around curve B without relying on friction?
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