What is the final temperature of 0.5 kg of water initially at 18 °C after 65 kJ of

heat is added

a. 31 °C

b. 42 °C

c. 49 °C

d. 27 °C

A ball is dropped off the side of a bridge after falling 1.55 s, what is the initial velocity

A tuning fork produced four beats per second with a second, 270-Hz tuning fork. What are the two possible frequencies of the first tuning fork?

A light source is made to pass through a narrow slit in a window. how do you think the light rays will travel

What determines whether a charged object gains or loses electrons

What is a Rift Valley?

How did Niels Bohr change the atomic model based on his experimental results?

After landing on an unfamiliar planet, a space explorer constructs a simple pendulum of length 50.0 cm. She finds that the pendulum makes 100 complete swings in 136 s. What is the value of g on this planet?

When a the irregularities of one surface come into contact with those of another surface, occurs

What type of wave passes through the spring in the frog toy? Why?

Different kinds of substances have different properties of metals