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A football player punts the ball at a 45.0o angle. Without an effectfrom the wind, the ball would travel 60.0 m horizontally.
(a) What is the initial speed of the ball?
(b) When the ball is near its maximum height it experiences a brief gust of wind that reduces its horizontal velocity by 1.50 m/s. What distance does the ball travel horizontally?
Two equal positive charges of magnitude q1 = q2 = 1 nC are on the y axis at y1 = +3 cm and y2 = -3 cm. What is the magnitude and direction of the electric field on the x axis at x = 3 cm
Two parallel plates of area 190 cm2 are given charges of equal magnitudes 6.0 x 10-7 C but opposite signs. Calculate the dielectric constant of the material
Now suppose the friction is sufficient to keep the car from skidding. Compute the magnitude of the normal force exerted on the car by the road's surface.
A motorist travelling at 17m/s encounters a deer in the road 49m ahead. If the maximum acceleration the vehicle's brakes are capable of is -7 m/s2. If his or her reaction time is 1.9987 s, how fast will (s) he be travelling when (s) he reaches dee..
Bored, a boy shoots his pellet gun at a piece of cheese that sits, keeping cool for dinner guests, on a massive block of ice. What is the coefficient of friction between the cheese and ice
Two pieces of optically flat glass (n = 1.50) touch at one edge and a separated by a thin stretched fiber at the opposite edge. Light of wavelength 500 nm is shone from above and 100 dark fringes are counted. How thick is the fiber?
Batteries are rated in terms of ampere-hours (A · h). For example, a battery that can produce a current of 2.00 A for 3.00 h is rated at 6.00 A · h. At $0.0830 per kilowatt-hour, what is the value of the electricity produced by this battery
a laser with light of wavelength 500 nm shines through two parallel thin slits separated by 0.5 mm onto a screen and an
A uniform magnetic field (0.20 T) is directed 35 degrees above the horizontal, penetrating a horizontal circular coil (radius 6.0 cm)
In a 100 m race, Maggie and Judy cross finish line in a dead heat, both taking 11.4s. Accelerating uniformly, Maggie took 1.80 s and Judy 2.90s to attain maximum speed, which they maintained for the rest of the race. What was Maggie's acceleration..
An 85-kg jogger is heading due east at a speed of 1.9 m/s. A 55-kg jogger is heading 24° north of east at a speed of 3.8 m/s. Find the magnitude and direction of the sum of momenta of the two joggers.
a sinusoidal wave with an amplitude of 1.5 cm and a frequency of 100 hz travels at 200 ms in the positive x-direction.
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