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Maria wants to plant a small tomato garden in her yard. She bought 25 tomato plants, and she has read that ideally tomatoes are planted in a square grid to help them pollinate each other.How many pl
An elastic cord is 65 cm long when a weight of 56 N hangs from it and is 82 cm long when a weight of 84 N hangs from it. What is the "spring" constant of this elastic cord?
What fraction of the charge is contained within radius r = 0.410R? What is the ratio of the electric field magnitude at r = 0.410R to that on the surface of the sphere?
If the ball is thrown upward with the same initial velocity but in air instead of a vacuum, it reaches a height of 8.4 meters. What is the drag force (assuming that it is constant) on the ball durin
The reflected ray and the refracted ray are perpendicular to each other. What is the index of refraction of the transparent substance?
Two charged spherical conductors are con- nected by a long conducting wire, and a charge of 15 μC is placed on the combina- tion. One sphere has a radius of 4.05 cm and the other a radius of 6.05
Calculate the diameter of the bright circular spot formed on the 3.00 m high ceiling by the light reflected from the mirror.
A very long solenoid with a circular cross section and radius r= 8.10 cm with n= 1.90E+4 turns/m has a magnetic energy density uB= 5.70 mJ/m3. What is the current in the solenoid?
A ray of light is incident on the middle of the left face of the prism. What is the smallest angle of incidence for which the light will emerge from the right face of the prism?
Car 1 has a mass of m1 = 65 103 kg and moves at a velocity of v01 = +0.66 m/s. Car 2, with a mass of m2 = 92 103 kg and a velocity of v02 = +1.2 m/s, overtakes car 1 and couples to it. Neglect the e
What is the frequency of the fundamental oscillation? What tension is required if the n = 3 mode has a frequency of 0.538 kHz?
A bullet is fired into a suspended block [suspended as a pendulum so it can swing] and remains embedded. The bullet has a mass of 8.0 g, and the block a mass of 2.5 kg. If the pendulum swings and ri
An airplane must reach a speed of 191 mi/h to take off. If the runway is 453 m long, what is the minimum value of the acceleration that will allow the airplane to take off successfully?
A rock of mass 31 kg accidentally breaks loose from the edge of a cliff and falls straight down. The magnitude of the air resistance that opposes its downward motion is 261 N. What is the magnitude
Find the magnitude of the acceleration (in m/s2) for an alpha particle in a uniform electric field with a magnitude of 100 N/C.
What chemical phenomenon accounts for the elasticity seen in solids?
A positive charge of 0.0001221 C experiences a force of 0.114 N when located at a certain point. What is the electric field intensity at that point? Answer in units of N/C.
A skier with a mass of 61 kg starts from rest and skis down an icy (frictionless) slope that has a length of 70 m at an angle of 32° with respect to the horizontal.
What must the charge (sign and magnitude) of a particle of mass 1.41 be for it to remain stationary when placed in a downward-directed electric field of magnitude 620?
What is the wavelength of radio waves transmitted by a radio station with a frequency of 1220 million cycles per second?
Two children, each of mass 20 kg, ride on the perimeter of a small merry-go-round that is rotating at the rate of 0.25 rev/s. The merry-go-round is a solid disk of mass 30 kg and radius 3 m. The ch
An electron in a TV is accelerated toward the screen across a potential difference of 54.2 kV. How much kinetic energy does the electron gain while accelerating?
The ball is launched at an angle of 59.2 ° above the ground. Determine the (a) horizontal and (b) vertical components of the launch velocity.
When two tuning forks of 132 hz and 137 hz are sounded simultaneously how many beats per second are heard.
A 61-kg man standing on a scale in an elevator notes that as the elevator rises, the scale reads 817 N. What is the acceleration of the elevator?