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A baseball player hits a home run and the ball lands in the left field seats, 7.6 meter above the point at which the ball was hit. The ball lands with a velocity of 49 m/s at an angle of 31 degree to the horizontal. Determine the initial velocity of the ball when the ball leaves the bat?
A car takes 16 s to go from v = 0 to v = 50 m/s at approximately constant acceleration. If you wish to find the distance travelled using the equation d = 1/2 at2, what value should you use for a.
A ball of mass m makes a head-on elastic collision with a second ball (at rest) and rebounds with a speed equal to 0.390 its original speed. What is the mass of the second ball
Two tuning forks are played at the similar time in a room where the velocity of sound is 340 m/s. One of them has a frequency of340 Hz and the other a frequency of 360 Hz. What is the beat frequency? What is the successive time among beats?
Imagine holding an air-filled 2 L soda bottle (V = 2000 cm3) underwater. You have used a scale to determine that the mass of the soda bottle is mbottle = 50 g. what force is required to hold it underwater
The density of free electrons in gold is 5.90 x 10^28 m-3. The resistivity of gold is 2.44 x 10-8 at a temperature of and the temperature coefficient of resistivity is 0.004 ()-1. A gold wire, 1.30mm in diameter and 27cm long, carries a current of..
the near and far points of a person are at 40cm and 250cm respectively. find the power of the lens heshe shoeld use
Two astronauts, each having a mass of 88.0 kg, are connected by a 10.0 m rope of negligible mass. What is the new rotational energy of the system
The Mini Cooper is rated at the maximum power of 115. hp (1 hp=746 W), when moving at 80km/h. Suppose that the net force accelerating the car is constant.
q1. an archer puts a 0.30 kg arrow to the bowstring. an average force of 201 n is exerted to draw the string back 1.3
Stan and Ollie are standing next to a train track. Stan puts his ear to the steel track to hear the train coming. He hears the sound of the train whistle through the track 2.4 s before Ollie hears it through the air. How far away is the train? (Use 5..
A certain kind of glass has an index of refraction of 1.650 for blue light of wavelength 440 nm and an index of 1.620 for red light of wavelength 690 nm. If abeam containing these two colors is incident at an angle of 30.0° on a piece of this glass, ..
When you are lying horizontally, these muscles make an angle of approximately 5.00 with the femur, and if you raise your legs, With his leg raised to 60.0, find the tension in the abdominal muscle on each leg
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