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A baseball pitching machine works by rotating a light and stiff rigid rod about a horizontal axis until the ball is moving toward the target. Suppose a 144g baseball is held 87cm from the axis of rotation and released at the major league pitching speed of 82mph .
What is the ball's centripetal acceleration just before it is released?
What is the magnitude of the net force that is acting on the ball just before it is released?
A grandfather clock has a weight at the bottom of the pendulum that can be moved up or down. If the clock is running slow, what should you do to adjust the time properly?
What is an angular speed of the small cylinders, which is between two inner and outer cylinders
Find out the time that the arrow spends in the air.
A 2.5 kg block of wood sits on a table. A 3.0 g bullet, fired horizontally at a speed of 540 m/s , obtain the speed of the block immediately after the bullet exits
The battery has internal resistance of 0.100 Ω, and the rod and rails have negligible resistance. A 2.02 T magnetic field is directed perpendicular to the plane of the circuit. Find the magnetic force on the rod. F= 38.78 N. Find out the rod's spe..
A rod of mass m and radius R rests on two parallel rails that are a distance d apart have a length L. what is the speed of the rod as it leaves the rails
The speed of electromagnetic waves (which include visible light, radio, and x rays) in vacuum is 3.0 x 108 m/s. Wavelengths of visible light waves range from about 400 nm in the violet to about 700 nm in the red. What are the (a) minimum and (b) m..
A cart of a mass (8.51 +/- 0.1) g is configured in a setup. Determine the work done by the tension
If we observe a star's spectrum and find that the peak power occurs at the border between red and infrared light, what is the approximate surface temperature of the star
An airplane flies from Chicago to New Orleans (a distance of 1500 km) in the morning, then immediately returns to Chicago. What is the average speed for the entire trip
The length of a string is 456 cm. It is held ?xed at each end. The string vibrates in three sections; i.e., the string has three antinodes and string vibrates at 180 Hz.
A golfer imparts a speed of 37.5 m/s at an angle 50.0 degree above the horizontal. The tee and the green art at the same elevation. Determine how much time does the ball spend in the air
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