Exercise 19.
Repeat Exercise 3. with the contestant pulling the block of ice with a rope over his shoulder at the same angle above the horizontal as shown in Figure 5.7(b).

Number of spacecraft that visited both Jupiter and Saturn but neither Uranus nor Neptune:

(Please explain for a rating. Thanks!)

1.WHICH OF THE FOLLOWING IS NOT ONE OF THE FUNDAMENTAL QUESTIONS THAT SHOULD BE ASKED WHEN PLANNING AND CARRYING OUT ACTIVITIES IN A DEVELOPMENTALLY APPROPRIATE CLASSROOM?

A. Is it what the children want at the time of instruction?

B. Is it individually appropriate?

C. Is it socially and culturally appropriate?

D. Is it age appropriate?

2.Which of the following early childhood theorists developed the theory of learning intelligence as it pertains to individual learning styles?

A. Erik Erikson
B. Jean Piaget
C. Maria Montessori
D. Howard Gardner

3. Practice or pre-exercise theories of play pose the idea that

A. play provides children with an opportunity to practice adult activities.

B. play is necessary to reenergize human cognition.

C. children have too much energy and play will rid them of that energy.

D. children are the link between animals and human beings.

4. Direct instruction takes place when

A. Children explore their surroundings and learn based on their own curiosity and interests.

B. Learning takes place through a process of solving a specific problem.

C. The teacher shows children how something works or how to complete an activity.

D. A skill set is explicitly taught or an activity is completed.

5.Which of the following learning styles describes children who have highly developed auditory skills and the ability to use words effectively?

A. Interpersonal

B. Musical

C. Visual=spatial

D. linguistic

6. Exploratory play is best described as

A. the teacher guiding students through a process of discovery that leads to purposeful learning.
B. children being given the time necessary to explore their surroundings, learning based on their own curiosity and interests.
C. learning that takes place through a process of solving a specific problem.
D. the teacher showing children how something works or how to complete a portion of or the entire activity.

You have a resistor of resistance 200 Ω , an inductor of inductance 0.440 H , a capacitor of capacitance 6.10 μF and a voltage source that has a voltage amplitude of 34.0 V and an angular frequency of 250 rad/s . The resistor, inductor, capacitor, and voltage source are connected to form an L-R-C series circuit. A-What is the impedance of the circuit? B-What is the current amplitude? C-What is the phase angle of the source voltage with respect to the current? D-Does the source voltage lag or lead the current? E-What is the voltage amplitude across the resistor? F-What is the voltage amplitude across the inductor? G-What is the voltage amplitudes across the capacitor? H- Explain how it is possible for the voltage amplitude across the capacitor to be greater than the voltage amplitude across the source.

A rock climber stands on top of a 50 m -high cliff overhanging a pool of water. He throws two stones vertically downward 1.0 s apart and observes that they cause a single splash. The initial speed of the first stone was 2.2 m/s .

How long after the release of the first stone does the second stone hit the water?

What was the initial speed of the second stone?

What is the speed of the first stone as it hits the water?

What is the speed of the second stone as it hits the water?

Please explain how to solve the equations

A golfer hits a shot to a green that is elevated 2.50 m above the point where the ball is struck. The ball leaves the club at a speed of 17.3 m/s at an angle of 43.0˚ above the horizontal. It rises to its maximum height and then falls down to the green. Ignoring air resistance, find the speed of the ball just before it lands.

Example: The radioactive isotope decays by electron capture with a half –life of 272 days. •(a) Find the decay constant of the lifetime. •(b) If you have a radiation source containing , with activity 2.00µCi, how many radioactive nuclei does it contain? •(c) What will be the activity of this source after one year?5

The telescopes on some commercial surveillance satellites can resolve objects on the ground as small as 92 cm across (see Google Earth), and the telescopes on military surveillance satellites reportedly can resolve objects as small as 12 cm across. Assume first that object resolution is determined entirely by Rayleigh's criterion and is not degraded by turbulence in the atmosphere. Also assume that the satellites are at a typical altitude of 408 km and that the wavelength of visible light is 537 nm. What would be the required diameter of the telescope aperture for (a) 92 cm resolution and (b) 12 cm resolution? (c) Now, considering that turbulence is certain to degrade resolution and that the aperture diameter of the Hubble Space Telescope is 2.4 m, what can you say about the answer to (b), i.e. is the military surveillance resolution accomplished?

A thin-walled, hollow spherical shell of mass m and radius r starts from rest and rolls without slipping down the track shown in the figure (Figure 1) . Points A and Bare on a circular part of the track having radius R. The diameter of the shell is very small compared to h0 and R, and rolling friction is negligible. a) What is the minimum height h0 for which this shell will make a complete loop-the-loop on the circular part of the track? b) How hard does the track push on the shell at point B, which is at the same level as the center of the circle? c) Suppose that the track had no friction and the shell was released from the same height h0 you found in part (a). Would it make a complete loop-the-loop? d) In part (c), how hard does the track push on the shell at point A, the top of the circle? e) How hard did the track push on the shell at point A in part (a)?

In an experiment performed at the bottom of a very deep vertical mine shaft, a ball is tossed vertically in the air with a known initial velocity of 10.0 m/s, and the maximum height the ball reaches (measured from its launch point) is determined to be 5.101 m. Knowing the radius of the Earth, RE = 6370 km, and the gravitational acceleration at the surface of the Earth, g(0) = 9.81 m/s2, calculate the depth of the shaft.

On Apollo Moon missions, the lunar module would blast off from the Moon's surface and dock with the command module in lunar orbit. After docking, the lunar module would be jettisoned and allowed to crash back onto the lunar surface. Seismometers placed on the Moon's surface by the astronauts would then pick up the resulting seismic waves.

Find the impact speed of the lunar module, given that it is jettisoned from an orbit 170 km above the lunar surface moving with a speed of 1550 m/s

Thanks!

(1) What is the needle of a compass attracted to?

(2) What is the difference between ferromagnetic  and magnetic?

(3) In terms of electrons, what causes permanent magnetism?

(4) What is the technique in making synthetic magnets?