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A banner is suspended from a horizontal, pivoted pole. The pole is 2.10 m long and weighs 170 N. The banner, which weighs 105 N, is suspended 1.80 m from the pivoted point or axis of rotation. What is
A stretched string is fixed at both ends, 71.05 cm apart. If the density of the string is 0.0074g/cm and its tension is 600 N, what is the wavelength of the first harmonic? Answer in units of cm.
Determine the mass of oxygen that has been withdrawn from the tank when the pressure reading is 23.0 atm. Assume the temperature of the tank remains constant.
Assume the equation x=At3+Bt describes the motion of a particular object, with x having the dimension of length and t having the dimension of time. Determine the dimensions of the constants A and B.
A charged particle A exerts a force of 2.69 to the right on charged particle B when the particles are 13.7 mm apart. Particle B moves straight away from A to make the distance between them 17.7 mm.
Why do you think that it takes a significantly stronger electric field strength to move the beam of alpha particles compared to the beam of electrons?
With the pebble on the block, the block oscillates with an amplitude of 12 cm. What is the net force on the pebble when it is at the point of maximum upward displacement?
A hot-air balloon is ascending at the rate of 13 m/s and is 78 m above the ground when a package is dropped over the side. a) How long does the package take to reach the ground?
The mountain rises at a slope of 30 degrees. Assuming that gravitational acceleration is 9.8 metres per second per second, and disregarding air resistance and the height of the cannon (in other word
A very large nonconducting plate lying in the xy-plane carries a charge per unit area of 5θ. A second such plate located at z = 5.00 cm and oriented parallel to the xy-plane carries a charge p
A car travels up a hill at a constant speed of 41 km/h and returns down the hill at a constant speed of 80 km/h. Calculate the average speed (in km/h) for the round trip.
The guns, once fired, lanuched self-accelerating bullets with a constant horizontal acceleration of 7 meters per second squared. Guns were fired perfectly horizontally to hit the human targert as it
A person walks in the following pattern: 4.9 km north, then 1.5 km west, and finally 3.0 km south. (a) How far (in km) and (b) at what angle (measured counterclockwise from east) would a bird fly in
A black of mass m sliding on a frictionless table is attached to a horizontal string that passes through a tiny hole in the table.
A uniform stick is held horizontally and then released. At the same instant, one end is struck with a quick upwards blow. If the stick ends up horizontal when it returns to its original height, what
A pendulum is made of a uniform stick of length L. It is allowed to swing in a vertical plane. Where should the pivot be placed on the stick so that the frequency of (small) oscillations is maximum?
A mercury barometer reads 770.0 mm on the roof of a building and 785 mm on the ground. Assuming a constant value of 1.29 kg/m3 for the density of air, determine the height of the building.
An object floats in water, with 55% of its volume submerged. What is its approximate density?
what is the tension in the string when the second ball directly beneath the first ball?
Positive point-charges of +16.5 μC are fixed at two of the vertices of an equilateral triangle with sides of 2.45 m, located in vacuum. Determine the magnitude of the E-field at the third vertex.
Three point charges have equal magnitudes, two being positive and one negative. These charges are fixed to the corners of an equilateral triangle, as the drawing shows. The magnitude of each of the
A spot of paint on a bicycle tire moves in a circular path of radius 0.33 m.When the spot has traveled a linear distance of 1.67 m, through what angle has the tire rotated? Give your answer in radia
A point is located in a polar coordinate system by the coordinates r= 2.5 m and 0= 35 degrees. Find the x- and y- coordinates of this point, assuming that the two coordinate systems have the same or
A body has a mass of 2000 kg. Determine the weight of the body expressed in N if it is (a) located on the surface of the earth, (b) it is located in a satellite orbiting at an altitude of 30,000 m,
What is the magnitude of the gravitational attraction between Saturn and Earth expressed in N. Assume that Earth and Saturn are aligned so that a straight line can be drawn from the sun through Eart