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A rifle is aimed horizontally at a target 29 m away. The bullet hits the target 2.3 cm below the aiming point. Neglect air resistance. (a) What is the bullet's time of flight?
A slide projector needs to create a 95 cm high image of a 2.0 cm tall slide. The screen is 340 cm from the slide. Assume that it is a thin lens.
what is the minimum value for the hanging weight to the nearest tenth of a kilogram if L = 1.7 meters and the configuration is to remain stable"
A block of mass 12.0 kg slides from rest down a frictionless 34.0° incline and is stopped by a strong spring with k = 1.0 104 N/m. The block slides 3.00 m from the point of release to the point
A person pulls on a 50 kg desk with a 200N force acting at 30° angle above the horizontal. The desk does not budge. Draw a force diagram for the desk.
A car is moving down a street at 65 km/h. A child suddenly runs into the street. If it takes the driver 0.76 s to react and apply the brakes, how many meters will the car have moved before it begins
A 1000-N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A 1960-N crate hangs from the far end of the beam. Using the data shown in the figure, f
A person is trying to judge whether a picture (mass = 0.7 kg) is properly positioned by temporarily pressing against the wall. The pressing force is perpendicular to the wall. The coefficient of sta
The lower weight is a light bag filled with sand. Suppose a pin pokes a hole in the bag and the sand slowly leaks out while the puck is revolving. What will be the puck's speed after all of the sand
Determine the mass defect for (a) helium 2He3, which has an atomic mass of 3.016 030 u, and (b) the isotope of hydrogen known as tritium 1T3.
Which of the statements below is not correct concerning the pressure gradient force?
Two friends, Al and Jo, have a combined mass of 136 kg. At an ice skating rink they stand close together on skates, at rest and facing each other, with a compressed spring between them. The spring i
The froghopper Philaenus spumarius is supposedly the best jumper in the animal kingdom. To start a jump, this insect can accelerate at 4.00 km/s2 over a distance of 2.0 mm as it straightens its spec
Calculate the conductivities due to the Na and K concentrations in blood plasma, interstitial fluid and intracellular fluids assuming kc is very small, and therefore negligible contribution to the i
A force acts on a 1.5-kg, mass, giving it an acceleration of 3.0 m/s. If the same force acts on a 2.5-kg mass, what acceleration would be produced?
A child slides down a slide with a 34o incline, and at the bottom her speed is precisely half what it would have been if the slide had been frictionless. Calculate the coefficient of kinetic fricti
It has been estimated that the Earth contains 109 metric tons of natural uranium that can be mined economically. What is the energy release possible from the 235U in 109 metric tons of natural uranium
Mercury, the planet closest to the sun, has an orbital radius of 5.8 × 107 km. Find the angular displacement of Mercury as it travels through an arc length equal to the radius of Earth's orbit
Algol consists of a 3.7 MSun main-sequence star and a 0.8 MSun subgiant. Why does this seem surprising, at least at first?
A proton with speed v = 3.00 x 105 m/s orbits just outside a charged sphere of radius r = 1.00 cm. What is the charge on the sphere?
A ball is thrown horizontally from the top of a building 110 m high. The ball strikes the ground 54 m horizontally from the point of release. What is the speed of the ball just before it strikes the
Light of wavelength 0.538 µm (in air) enters the water in a swimming pool. The speed of light in water is 0.750 times the speed in air. What is the wavelength of the light in water?
A negative charge of -2.0 10-4 C and a positive charge of 9.0 10-4 C are separated by 0.26 m. What is the force between the two charges?
A potential difference of 75 mV exists between the inner and outer surfaces of a cell's membrane. The inner surface is negative relative to the outer surface. How much work is required to eject a po
A 77 g arrow is fired from a bow whose string exerts an average force of 95 N on the arrow over a distance of 82 cm. What is the speed of the arrow as it leaves the bow?