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The quarterback is trying to throw the ball straight ahead to a receiver who starts his run from a point 20 meter to the left of him. Their aim is that receiver catches the ball 40 m strait ahead of the quarterback at the similar height at which the ball was thrown. The receiver starts his run towards the intended point at t=0 with a constant velocity of 7.7m/s.
a) Find how long should the quarter back wait before he throws the ball if his throw will cause the ball to travel at a speed of 19.8 m/s?
b) Find at what angle above the horizontal should he throw ball?
At t = 5 s, an object moving on the x-axis at x = 3 m is traveling at 8 m/s i. At t = 9 s, it is at x = 17 m and its velocity is -1 m/s i. Find the average acceleration for this interval
A microscope has an objective lens with a focal length of 11.0 mm . A small object is placed 0.60mm beyond the focal point of the objective lens. What is the magnification of the real image
Calculate the speed of an 8.5 × 104 kg airliner with a kinetic energy of 1.2 × 109 J
Blood is conductive enough that it can be treated as a moving conductor. what is the magnitude of the voltage that is measured with the electrodes in the drawing
What is the greatest mass that can be accelerated upwards at 2.9 m/s2 if the stress in the cable is not to exceed the elastic limit of the cable, that is 2.2 108 Pa.
light from a helium-neon laser lambda 633 nm is incident on a single slit. what is the largest slit width for which
a solid sphere of brass bulk modulus of 1.40 x 1011 nm2 with a diameter of 4.00 m is thrown into the ocean. by how much
The temperatures indoors and outdoors are 297 and 311 K, respectively. A Carnot air conditioner deposits 6.22 105 J of heat outdoors. How much heat is removed from the house?
The figure below shows a circuit with a battery and 3resistors. The resistors have values of 4 Ω, 3Ω and6Ω as shown. The battery is 18 V. Calculate the equivalent resistance of the combination of resistors and the current in each resistor, the cu..
During 5 successive 0.93 min intervals, a runner moves at the following constant speeds: 0.440 km/min, Compute the total distance traveled and the average speed
A man of mass 65 kg falls stiff-legged straight down from a height of 2m. He lands on one foot. The femur is a bone in the leg with the length L=.65m, and a cross-sectional area of about 2.0 x 10^-4m^2. The Young's modulus for bone is 9.4x 10^9 N/..
Bacteria vary somewhat in size, but a diameter of 2.0 nanometers is not unusual. What would be (a) volume (in cubic centimeters) and (b) surface area (in square millimeters) of such a bacterium, assuming that it is spherical.
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