Give a specific example of a machine and describe how its mechanical efficiency might be calculated

You get an unknown box in tge mail. It weight abiyt 3000 newtons resting on your porch. If the srea of the box is sround 1.5 square meters, What pressure is the box exerting on the ground?

When a ceiling fan rotating with an angular speed of 2.20 rad/s is turned off, a frictional torque of 0.225 n · m slows it to a stop in 25.5 s. what is the moment of inertia of the fan?

Jaden's mass is 50 kilograms. His weight on Earth is newtons, and his weight on Mars is newtons.

You push down on the car to provide more friction for the tires allowing the cars tires to propel it forward 5 meters. How much work do you do?

The periodic table was developed in order to group and organize elements with similar physical and chemical properties. Elements such as fluorine, chlorine, and iodine all are very reactive and only need one more electron to fill their outer shells.

ngrid kicks a football with an initial velocity of 12 m/s at an angle of 45° relative to the ground. The horizontal component of the initial velocity to the nearest tenth is m/s.

A 60-watt light bulb has a voltage of 120 volts applied across it and a current of 0.5 amperes flows through the bulb. What is the resistance of the light bulb?

In a laboratory experiment, a diffraction grating produces an interference pattern on a screen. If the number of slits in (including the slit spacing) the same, then The fringes stay the same brightness and get closer together.

The gravitational potential has a zero value gravitational field in the same place is? Maximum or null indeterminate

In four-seater countries, temperature drops below 0 ° C during peak winter. Why only the frozen surface of the water instead of the whole river and the lake freezes?