Learn more about our help with Assignments: Physics
Search & Filtering
6. Estimate your own density.
A ball bearing of mass 180 g is hung on a thread in oil of density 800 kg m−3. Calculate the tension in the string if the density of the ball bearing is 8000 kg m−3.
4. A golf ball has a diameter of 4.27 cm.
(a) If a golf player hits the ball into a stream, what upthrust does it experience when it is completely submerged? (Assume density of water = 1000 kg m−3.)
(b) If the mass of the ball is 45 g, what is the resultant force on it when underwater?
(c) Referring to Newton’s laws of motion, explain what will happen to the submerged golf ball.
Estimate the mass of air in this room.
The radius of a bowling ball is 0.11 m and its mass is 7.26 kg. What is its density
(a) in kg m−3?
(b) in g cm−3?
(a) in kg m−3?
(b) in g cm−3?
Physics
Assuming that the frequency v of vibrating string may depend upon (1) applied load f(2) length (1) of string and (3) was per unit length of string (4( prove that u k1|v✓f\u where u=m\1
Physics
If 150cm cube of steam at 100°C is added to 250cm cube water at 40°C, how much steam (in cm cube) is condenced into water at 100°C?
Physics
A 54g copper calorimeter contains 80cm cube at 20°C. A very cold 110g copper cylindrical sample is dropped into the water to partially freeze, with 5cm cube being converted to ice. The final temperature of the system is 0°C. What is the initial temperature in kevins of the cylindrical sample?
Physics
: When the Italian physicist Evangelista Torricelli was trying to calculate the atmospheric pressure, he invented the mercury barometer . The main idea of this device is about balancing the pressure at the same layer between the weight of the mercury column and the weight of the air column above the open bath.
If the height of the mercury (13.6 g.cm-3) column was 60 cm at a specific place. Find:
1) The atmospheric pressure at that place.
2) The height of the air (0.001 g.cm-3) column at this place.
If the height of the mercury (13.6 g.cm-3) column was 60 cm at a specific place. Find:
1) The atmospheric pressure at that place.
2) The height of the air (0.001 g.cm-3) column at this place.
Physics
Using a mercury (13.6 g.cm-3) barometer, a student found that at the top of a mountain the mercury was 50 cm height, and at the bottom of the same mountain it reads 70 cm. Find the height of the mountain (the density of air was 0.002 g.cm-3 during the experiment).
