Other Physics Answers

A 30 kg child is the only rider of a Ferris wheel with 12 cars and a radius of 10 meters. Each of the carriages of the ride has a mass of 80 kg.

a. What torque does the child exert on the wheel at the 9 o’clock position?

b. the 10 o’clock position?

c. the 11 o’clock position?

d. the 12 o’clock position?

What amount of force would be required to cause the same torque as in problem 1 if the force is exerted in the same place, but at an angle of 53° from the wrench?

What torque does a force of 20N exert if it is exerted perpendicular to a wrench and a distance of 0.20m from the axis of rotation?

1) Find an expression for the velocity of water just before it hits the floor of a water fall if the temperature change is tita when it hits the floor

2) what is the time of heating water of 30kg using an electronic coil with 240V accross it, with a current of 13A flowing through it. Given that the specific heat capacity of water is 4200j/kg

A cleaner pushes a 4.5-kg laundry cart in such a way that the net external fo N. Calculate the nagnitude of his carts acceleration

1.     A 700.0-N sign hangs from the end of a uniform strut. The strut is 4.0 m long and weighs 800.0 N. The strut is supported by a hinge at the wall and by a cable whose other end is tied to the wall at a point 3.0 m above the left end of the strut. Find the tension in the supporting cable and the force of the hinge on the strut.

a ball is projected with initial velocity of 18 m/s at an angle of 25 degree. what is the time of flight of the ball?

A projector lamp is rated for 75 volts and has hot resistance of 25ohms. Solve the value of series resistance which will operate the lamp for 220 volts supply

Show the covalent bonding of the following molecules using this format below

1. Water, H2O

2. Phosphorous trichloride, PCI3

3. lodine gas, I2

The period of the Moon’s orbit is 27.0 days. The radius of the moon’s orbit is 3.8 x 10 8 m. The period of a geostationary satellite is 1.0 day. What is the radius of the geostationary satellite’s orbit?