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What must the charge (sign and magnitude) of a 1.50-g particle be for it to remain stationary when placed in a downward-directed electric field of magnitude 610?
If a sound wave that is traveling in air approaches a flat water surface with an angle of incidence of 11.9?, what is the angle of refraction?
The force of friction between the moving box and the floor has magnitude 41.5. What is the box's acceleration just after it begins to move? Find both the x and y components of the acceleration of th
A 1500-kg car moving east at 26 m/s collides with a 1720-kg car moving south at 15 m/s and the two cars stick together. What is the velocity of the cars right after the collision?
Sally travels by car from one city to another. She drives for 29.0 min at 64.0 km/h, 37.0 min at 42.0 km/h, and 23.0 min at 30.0 km/h, and she spends 13.0 min eating lunch and buying gas. a) Determi
Find the acceleration of the crate if the applied force is 380 , the mass of the crate is 32 and the coefficient of kinetic friction is 0.42
In a television, electrons shoot down the picture tube and strike fluorescent material on the screen, causing light to be emitted and producing the picture. Suppose that a certain set, the electron
A cowboy at a dude ranch fills a horse trough that is 1.2m long, 67cm wide, and 44cm deep. He uses a 2.5cm diameter hose from which water emerges at 2.5m/s. How long does it take him to fill the tr
An electron accelerated from rest through a voltage of 420 V enters a region of constant magnetic field. If the electron follows a circular path with a radius of 18 cm, what is the magnitude of the
Determine the escape speed from (a) Jupiter's moon Callisto, with mass and radius 2.40 , and (b) a neutron star, with the Sun's mass crammed into a sphere with radius 5.50.
An applied force stretches the combination by d = 1.8 mm. How far does the point where the two wires meet move?
The mass of a proton at rest is m. If the proton is moving so fast that its total energy is three times its rest energy, then what is the kinetic energy of the proton?
A metal tank with volume 3.10 L will burst if the pressure of the gas it contains exceeds 100 atm. Is it reasonable to ignore the thermal expansion of the tank? Explain?
Consider a +2.0x10^-6C charge on the y-axis at y=5m and a -4.0x10^-6C charge on the x-axis at x=4m. What is the potential at the origin relative to V=0 at infinity is, in volts?
When the frequency of the generator is 25.0 kHz, the rms current is 87.2 mA. What is the capacitance or inductance of the unknown component in the box?
What is the acceleration of the projectile when it reaches its maximum height? What is the magnitude of the projectile's velocity just before it strikes the ground.
A 3.4 k and a 2.4 k resistor are connected in parallel; this combination is connected in series with a 1.8 k resistor. If each resistor is rated at 1/2 W (maximum without overheating), what is the
An electron is traveling through a uniform electric field. The field is constant and given by {bf{vec E}} = left( {2.00 times 10^{ - 11} {rm{N/C}}} right){bf{hat i}} - left( {1.20 times 10^{ - 11}
The level at which it was hit. If the center fielder is initially 1.10 X 10^2 meters from home plate, what must be his average speed?
A foam ball of mass 0.150 g carries a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direction of
An angle of 75 degrees with respect to the horizontal surface of the water. Determine her initial velocity, both magnitude and direction?
A 15 g stone is tied to the end of a string and moves in a horizontal, circular path. The radius of the circle is 1.0 m. The stone makes 325 complete revolutions in 20 s. What is the tension in the
The edge of a cube consist of equal resistors of resistance R, which are joined at the orners, let a battery be connected to two opposite corners of a face of cube. What is the efective resistance?
The police at the scene of the accident note that the point of impact is 130 meters from the base of the cliff. How fast was the car traveling when it when over the cliff?
A physics student in a hot air balloon ascends vertically at constant speed. Consider the following four forces that arise in this situation: F1 = the weight of the hot air balloon F3 = the force of