Physics Answers

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?

A force of 50 N applied on a machine produces a power output of 500 W. Find the velocity created due to the force

A uniform plank AB, of weight W, is 10 m long. A force of 30 N is applied at end A and the plank is balanced on a pivot placed 2 m from end A. Given that the plank is in equilibrium, calculate the weight of the plank. 

A block with a mass of 0.20 kg is hung at the end of a spring and it is lifted vertically so that the spring is unstretched. The block is then realesed and it touches the table with a velocity of 0.80 m s-1. If the distance of the table from the realesed point of the spring is 0.10 m, what is the force constant of the spring?

Consider two steel balls. Ball 1 has a

weight of 1.5 N. Ball 2 has a weight

of 15 N. Both balls are released

simultaneously from a height of 2.0 m.

Which ball hits the ground first?

a) Ball 1 hits the ground first.

b) Ball 2 hits the ground first.

c) Both balls hit the ground at the

same time.

d) It can’t be determined from the

information provided.

I think that the answer will be (b) because the answer (c) will be right only if ignore the air resistance.

I got an answer before which is (c).

Why is that?

Thank you so much.

You turned the knob of a 196.3 cm by 109.1 cm door (with a mass of 9.88 kg) and pushed it with a perpendicular force of 9.46N to open it. What is the angular acceleration of the door (in rad/s²)?

You turned the knob of a 194.22 cm by 103.86 cm door (with a mass of 9.05 kg) and pushed it with a perpendicular force of 5.18N to open it. What is the approximate torque on the door in (N⋅m)?

An asteroid (mass= one-tenth of the Earth's mass, radius= one-twentieth of the Earth's radius) spins with constant angular velocity if 289 revolutions per day and is on a rotational collision with Earth. Assuming inelastic collision, what is the common final angular velocity (in rev/day) of the Earth-asteroid system? Assume the two objects are solid spheres.

m_Earth= 5.97x10²⁴kg, r_Earth= 6.37x10⁶m

Three cubic meter of air at a pressure of 20 kPag is compressed at constant temperature to a pressure of 425 kPag. Calculate the final volume of the air.