A man fell I off the roof of a 150 meters tall building to his death. How many seconds would d this man travel in the air before smashing his body on ) the ground (g=9.8 m/s^2 between 4 and 5 exact 5 less than 5 less than 4

Fill in the Blank Question The process of changing the shape of the lens to view a close object is called square

Which of the following statements is TRUE about the rings of the planets? The innermost ring of Saturn is the D ring and the outermost ring is the E ring Uranus has 5 thin rings, two of which are named the Galle and Adams rings The Gossamer and Halo rings are part of the rings of Neptune Neptune has 13 thin distinct rings, one of which is named the epsilon ring The Cassini Division is a gap between the B and C rings of Saturn

A 0.0780 kg lemming runs off of a 5.36 m high cliff at 4.84m/s What is the kinetic energy of the lemming right before it reaches the ground? KE=[?]J Hint:how much potential energy is converted into kinetic energy? KE (J) square disappointed

81. What are the wavelengths of (a)X-rays of frequency 2.0times 10^17 Hz? (b)Yellow light of frequency 5.1times 10^14 Hz? (c) Gamma rays of frequency 1.0times 10^23

Which of the following statements are true? Check all that apply. A hydrogen atom in the n=4 state is at a lower energy than one in the n=3 state. A hydrogen atom in the n=3 state can emit light at only two specific wavelengths. The energy of an emitted photon equals the energy difference of the two states involved in the emission.

The Earth's blue sky color is due to a. Reflections of blue light by the atmosphere b. Absorption of all visible light by the atmosphere c. Ocean colors

A projectile is launched from ground level at 10^circ above the horizontal and lands downrange. What other projection angle (in degrees)for the same speed would produce the same down-range distance?

Nuclear __ is a reaction in which two or more atomic nuclei are combined to form one or more different atomic mucleus and subatcmic particles (neutrons or protons) a. fusion b. fission

The opening and closing of the lid of your jar of peanut butter uses the technique of a __ pulley screw wedge wheel and axle

Hot Questions

Newton's laws of motior fail: when dealing with extremely low masses. for objects with extremely large masses. when using atomic clocks rather than stopwatches. at speeds significantly less than the speed of light. in helping us understand most of the everyday world.

A radioactive substance decays exponentially. A scientist begins with 140 milligrams of a radioactive substance. After 24 hours 70 mg of the substance remains. How many milligrams will remain after 27 hours? $\square $ mg Give your answer accurate to at least one decimal place Question Help: Video

The branch of biomechanics that deals with the aspects of moving systems is known as dynamics. kinetics. mobility. kinematics.

When a forklift is loaded, where is its center of gravity? A. Under the operator B. At the center of the forklift C. Varies based on the combined centers of gravity of the forklift and the load D. At the center of the forks

Which of these statements is most likely correct about a weak nuclear force? (2 points) It binds electrons and protons. It is a repulsive force. It is an attractive force. It binds protons and neutrons.

Which side of the electromagnetic spectrum has shorter waveiengths? $\square $ Which side of the electromagnetic spectrum has higher energy? $\square $ Which side of the electromagnetic spectrum has higher frequencies? $\square $ blue

Living and Nonliving substances obey all of the answers the 1st law of thermodynamics. the 2nd law of thermodynamics. the law of gravity.

Physics is explicitly involved in studying which of these activities? A. the mixing of metals to form an alloy B. the metabolic functions of a living organism C. the motion of a spacecraft under gravitational influence D. the depletion of the atmospheric ozone layer due to pollutants E. the killing of cancerous cells by radiation therapy

Outdoors, shadows are longest at what time of day? Midnight Sunrise and sunset Noon 10 a.m.

Whose laws of motion became the basic building blocks for our understanding of the functioning of the universe? Johannes Gutenberg Martin Luther Isaac Newton Francis Bacon Rewatch