How much amount of heat is required to raise the temperature of 20 grams of water from 10°C to 30°C? The specific heat of water is 4.18 J/g°C.

A baseball sitting on the roof of the stadium has 60 J of potential energy. A pigeon lands on the baseball and knocks it off.

Which of the following is NOT a health benefit of exercise? A. higher blood pressure B. build muscle C. burns fat

A car travels in a straight line along a road. Its distance x from a stop sign is given as a function of time t by the equation x (t) = 9t^2-8t^3 m. Find the acceleration (in m/s/s) of the car at t = 4.6 s. Give answer with two decimal places.

In order to make an electric current flow it is necessary to have

A therapist challenges her client to journal daily as a part of her treatment plan. The therapist offers her client a new music download if she meets this challenge for one week.

After creating a question and forming a hypothesis, what is the next step in the scientific method

Roger sees water balloons fall past his window. He notices that each balloon strikes the sidewalk 0.51 s after passing his window. Roger's room is on the second floor, 10 m above the sidewalk.

Which statements accurately describe the Doppler effect?

Describe how mass and distance affect gravitational force.

a bike can climb the inclined road at uniform speed of 72 km/hr by applying force 500N what will be the power applied by the bike?