How long ago did homo sapiens first appeared in the fossil record? Identify the era in which this occurred.

The current in a hair dryer measures 17 amps. The resistance of the hair dryer is 14 ohms. What is the voltage?

An object with the mass is 20kg has a net force of 80 N acting in it. What is the acceleration of the object?

you push a box across the floor with a force of 30n you it 15 meters in 8 seconds. how much work did you do how much power did you see

What do we call a part of the body with a special function?

A diffraction grating produces a first-order maximum at an angle of 10 degree. What is the angle of the third order maximum?

For a fixed amount of gas, if the absolute temperature of the gas is doubled, what happens to the pressure of the gas?

A 500-kilogram sports car accelerates uni- formly from rest, reaching a speed of 30 me- ters per second in 6 seconds. What distance has the car traveled during the 6 seconds?

What is efficiencywhat is the formula of mechanical advantage and velocity ratio of labour

What is the wavelength of an ekectromagnetic wave that has a frequency of 40,000 hz? the speed of light is 3x10^8 m/s?

Witch of the following is an example of a pull