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a horizontal snowy road at a
A 25.0-kg sled is being pulled across constant velocity. The pulling force is parallel to the horizontal road and the coefficient of kinetic friction between the sled and snow is 0/1 . Determine the magnitude of the pulling force.
a fixed mass of gas at costant presure has a volume of 100°c find its volume at temperature of 54°c
Earth orbits the sun once every 365.25 days.
Find the average angular speed of Earth
about the sun.
Answer in units of rad/s.
The damage threshold for the retina is 100 W/m2. This means that a damage to the retina can occur at an average intensity greater than this. The light coming from a 5.0 mW green laser has a diameter of 1.2 mm. (a) Will this laser exceed the damage threshold for the retina? (b) What are the maximum values of the electric and magnetic fields of the beam coming from this laser?
Find the measurement of the angle of refraction
Electromagnetic induction is used in the building of electrical generators, which create voltage by moving a magnetic
field past coils of wire using mechanical power. However, this is far from the sole practical use of this principle.
Directions: Choose two of the following gadgets and conduct some study on how it works on the internet or at a library.
In your explanation, you will need to relate to Faraday's Law.
• Metal detectors, transformers, tape players, and induction stoves
Two 50-g ice cubes are placed into 0.2kg of water in a Styrofoam cup. The water is initially at a temperature of 25C and the ice is initially at a temperature of -15C. What is the final temperature of the drink? The average specific heat for ice between -15C and 0C is 2.05kJ/kg C.
An ideal gas that occupies 1.2m3 at a pressure of 1 x 105 Pa and a temperature of 27C is compressed to a volume of 0.6m3 and heated to a temperature of 227C. What is the new pressure?
What is central force
Two spherical objects have masses of 8000kg and 1500 kg. Their centers are separated by a distance of 1.5m. Find the gravitational attraction between them.
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