A fallen tree is lifted 2.75 meters how much work is done

A dancer lifts a 200-kg barbell with an acceleration of 3 m/s2. How much force does the weightlifter use to raise the barbell

During which stage of prophase i does crossing over take place?

Which quantity is a vector? (1) power (2) kinetic energy (3) speed (4) weight

how do i describe, how the potential energy of water molecules changes from a solid to a liquid and then from a liquid to a gas?

A 20-N falling object encounters 4 N of air resistance. The magnitude of the net force on the object is?

A steamboat moves with velocity components of 6 km/hr along the x direction and 8 km/hr along the y direction. what is the direction of the steamboat with respect to the x axis?

What are 3 ways scientists can take to reduce bias?

A water heater is operated by solar power. If the solar collector has an area of 6.39 m2, and the intensity delivered by sunlight is 550 W/m2, how long does it take to increase the temperature of 1.00 m3 of water from 19.4∘C to 72.1 ∘C?

Which of the following factors will negatively impact the rate of diffusion of a molecule? A short distance between two concentrations of the molecule A low difference in the concentration of the molecule across the media A warm environment

A sound wave has a frequency of 1,395 Hertz. All sound waves in air travel at 343 m/s. Find the wavelength of the sound wave. what's the answer?