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Questions in physics

[Open]If a grocery cart with a mass of 16.5 kg accelerates at [tex]+2.31 \, \text{m/s}^2[/tex] against a frictional force of [tex]-15.0 \, \text{N}[/tex], what is the applied force?

[Open]A 71.8 kg man goes from an area where the acceleration due to gravity is 9.79 m/s\(^2\) to an area where the acceleration due to gravity is 9.82 m/s\(^2\). What is the change (in kilograms) to the mass of the man? Respond to three significant digits expressed as a.bc and record your responses for a, b, and c in that order.

[Open]What is the minimum resistance that can be made using five resistors, each of [tex]\frac{1}{5}[/tex] ohms?

[Open]Does a light bulb with greater wattage have greater brightness?

[Open]It refers to the emission of electrons from a metal when light shines on it. Example: static electricity.

[Open]How do you call the number of waves that pass a given point in a specific time, commonly one second?

[Open]Form of energy that exhibits wavelength behavior as it travels through space. Example: Microwave rays, UV rays.

[Open]A source of waves produces 20 crests and 20 troughs in 0.4 seconds. Find the frequency of the wave.

[Open]Why do footballers need power?

[Open]A train takes Ms. Eaddy 200 miles north and 150 miles south. The total trip took 3.5 hours. What was the average velocity of the train in miles per hour (mph)?