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what is the tension in the connecting string between the blocks?
What is the total charge of the protons that must be fired at the tumor to deposit the required energy?
Rita accelerates a 0.40 kg ball from rest to 9.0 m/s during the 0.15 s in which her foot is in contact with the ball. What average force does she apply to the ball during the kick?
A rocket is moving through empty space in a straight line with constant speed. It is far from gravitational effect of the earth or any planet or star. Under these conditions, the force that must be
The maximum strength the magnetic field in an electromagnetic wave is 4.8 x 10-6 T. What is the maximum strength of the electric field of the wave?
A heat lamp emits infrared radiation whose rms electric field is Erms = 3600 N/C. (a) What is the average intensity of the radiation?
A 1270 kg person rolls along a city street at 25.0 miles per hour, and a grapefruit has a mass of 0.142 kg. What speed must the grapefruit have if its momentum is to be equal in magnitude to that of
(A) What is the electric force exerted on an electron when it is 3.0 * 10^-15 meters from the center of the nucleus? (B) What is the acceleration of the electron at this point?
A scientist claims to have developed a new method of isolating individual particles, which will enable him to detect their radial position to within 0.20 nm and their radial momentum to within 10 eV
An open hemispherical surface of radius 0.0875 m is in a magnetic field of 0.1356 T. The circular cross-section of the surface is perpendicular to the direction of the field. Calculate the magnetic
A nearsighted person wears contacts to correct for a far point that is only 3.24 m from his eyes. The near point of his unaided eyes is 25.0 cm from his eyes. If he does not remove the lenses when r
A diverging lens has a focal length of -32 cm. An object is placed 27 cm in front of this lens. Calculate (a) the image distance and (b) the magnification
Two nanow wires are separated by 1.2 nm as measured by STM. Inside the wires the potential energy is zero, but between the wires the potential energy is greater than the electron's energy by only 1.
An RL circuit consists of a resistor R=68 Onμσ, an inductor, L=31 mH, and an ac generator with an rms voltage of 120 V. At what frequency will the rms current in this circuit be 1.5 A?
Gas is confined in a tank at a pressure of 1.0 X 10^8 Pa and a temperature of 15.0 C. If half the gas is withdrawn and the temperature is raised to 65.0 C, what is the new pressure in the new tank i
A 105 -μF capacitor is connected to an ac generator with an rms voltage of 20.0 V and a frequency of 100.0 Hz. What is the rms current in this circuit?
A) what are the x and y components of the velocity of the ball 3.20 s after it leaves the cannon? B) What are the x and y components of the displacement of the arrow during the 3.20 s interval?
How many electrons must be removed from A and put onto B to make the electrostatic force that acts on each object an attractive force whose magnitude is 72.0 N?
Using energy conservations, how would your calculated final velocity change if you threw a ball off a building straight downward at the same speed as you threw it upward? Explain/give an example.
The distance between 2 telephone poles is 50.0 m. When a 1.00 kg bird lands on the telephone wire, midway between the poles, the wire sags 0.200 m. (a) Draw a free-body diagram of the bird. (b) How
A mass is fixed to a spring and slides along a surface without friction. The mass is 0,50 kg and the spring constant is k = 40 N/m. We pull the mass to the right, 8,0 cm from the point of equilibriu
A block of mass 2kg and another 6kg are connected by massless string over a pulley in a shape of a disk with radius 0.38m and a mass of 4kg. I addition, the blocks are allowed to move on a fixed blo
The spring-loaded launcher makes an angles of 45 degree with the lower edge of the inclined plane.The goal is to get the ball in a small hole at the opposite corner of the inclined plane. With what
If a 114 A · h battery can deliver a steady current of 4.5 A until it is completely depleted, what is the total time the battery can deliver current without being recharged?
A plane has an airspeed of 142 m/s. A 16.0 m/s wind is blowing southward at the same time as the plane is flying. If the velocity of the plane relative to Earth is due east, what is the magnitude of