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You stand on a long flatbed railroad car which you estimate weighs about 4 times your own weight. Initially, the car rolls straight along the ground at 20 m/s, with negligible friction. You then begin to run across the top of the car opposite its own direction of motion relative to the ground. You estimate that your speed is about 5 m relative to the car. What is the resulting increase in the speed of the car?
An observer on earth sees an alien vessel approach at a speed of .6c. A second spaceship comes to the rescue overtaking the aliens while moving directly toward Earth at a speed of .90c relative to earth.
Suppose that the pressure is one atmosphere and decide the heat in joules required to produce 3.77 kg of water vapour at 100.0°C, starting with (a)3.77 kg of water at 100.0°C and (b)3.77 kg of liquid water at 0.0°C.
The electric field is defined as the Coulomb force per unit charge. Explain why the magnetic field cannot be defined as the magnetic force per unit charge.
What is the intensity level in decibels for a sound with an intensity of 2.35×10-4 W/m2, What is the intensity for a sound with an intensity level of 79.9 dB
A paperweight, when weighed in air, has a weight of W = 7.3 N. When completely immersed in water, Find the volume of the paperweight
Suppose that the numerical value of the initial speed of a rollercoaster is 12.00 m/s, the initial height is 300.0 m, and the mass of the coaster is1000.0 kg.
The density of gasoline is 7.30 × 102 kg/m3 at 0°C. Its average coefficient of volume expansion is 9.60 × 104 (°C)1, and note that 1.00 gal = 0.00380 m3. Estimate the mass of 11.0 gal of gas at 0°C
If the heater is 71.3% efficient, how long would it take to heat 45.5gal of water from 20 degrees C to 60 degrees
A Foucault pendulum is designed to demonstrate the effect of the Earth's rotation. What is the maximum speed of the pendulum
Compute the point between Venus and the Sun at which an object can be located therefore that the net gravitational force exerted on it by these two objects is zero
What is speed of the command module
An electric motor rotating a workshop grinding wheel at a rate of 1.16 x 102 rpm is switched off. Find through how many radians has the wheel turned during the interval found in (a)
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