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Bill is running on an exercise machine, o n average his feet put a force of 20N on the belt, which moves a constant velocity of 12km per hour.
A. If the machine converts half of Bills power into electricity, is there enough electric power to light a 60watt light bulb?
B. How many Joules of energy does Bill use if he runs on the exercise machine for 1 hour?
A certain voltmeter draws 0.02mA for full-scale deflection at 50V. (a) What is the resistance of the voltmeter? (b) What is the resistance per volt?
deepas uncle was surprised to see the fast changes in the world. he is not so educated. he asked deepa to tell him the
A circuit consists of one DC power supply providing 20 V and four resistors R1 = 10 Ohm, R2 = 20 Ohm, R3 = R4 = 40 Ohm. Calculate the total power provided by the power supply
A 1.00 x 102-g mass of tungsten at 100.0°C is placed in 2.00 x 102 g of water at 20.0°C. The mixture reaches equilibrium at 21.6°C. Compute the specific heat of tungsten.
Standing waves are set up on two strings fixed at each end. The two strings have the same tension and mass per unit length, but they differ in length by 0.60 cm. Determine the beat frequency produced by the two standing waves
You lay a mirror flat on the floor with one edge against a wall and aim a laser at the mirror. The ray reflects from the mirror and strikes the wall. Find the angle of incidence of the laser ray on the mirror
You have two capacitors: C1=410 nF and C2=260nF and a DC battery (Vbatt=9.00 volts). The two capacitors are connected to the battery in a series.
Suppose that all movement occurs in a straight line up and down along the y axis. Find out the muzzle velocity of the ball (i.e., the velocity of the ball at spring's equilibrium position).
A space vehicle is traveling at 3690 km/h relative to Earth when the exhausted rocket motor is disengaged, What is the speed (in km/h) of the command module relative to Earth just after the separation
A 2.50-g bullet travelling at a speed of 425 m/s, strikes the wooden block of a ballistic pendulum, such as that Figure in 7.12. The block has a mass of 215 g. Calculate the speed of the bullet/block combination quickly after the collision.
A race vehicle accelerates uniformly as it leaves the pit area, going from rest to 320 km/h in a semicircular arc with a radius of 198 meter. Find the radial acceleration of the vehicle at this time
A 3700 Ω resistor and a 1.2 µF capacitor are connected in series across a generator (60.0 Hertz, 120 Volt rms). Compute the average power delivered to the circuit
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