Questions
what are sales contract for a GOOD. Remember thats goods and services are governed by different...

what are sales contract for a GOOD. Remember thats goods and services are governed by different rules ( UCC v. Common Law ).

In: Economics

6. Read, summarize the facts, and explain the legal decision in DeGuzman v U.S., 147 F.Supp.2d.274...

6. Read, summarize the facts, and explain the legal decision in DeGuzman v U.S., 147 F.Supp.2d.274 (2001)

In: Accounting

We have a simple harmonic motion that is described by the equation: ? (?) = 0.82cos...

We have a simple harmonic motion that is described by the equation: ? (?) = 0.82cos (0.4? + 0.2) Determine the equation of v (t) and a (t).

In: Physics

I put together a scatterplot of Ice Cream Sales v Temperature. It is a positive correlation....

I put together a scatterplot of Ice Cream Sales v Temperature. It is a positive correlation. What are possible lurking variables?

In: Statistics and Probability

A 10.0 pF (picofarad - pico = 10^-12) is connected to a 12.0 V power supply....

A 10.0 pF (picofarad - pico = 10^-12) is connected to a 12.0 V power supply. What is the energy stored in this capacitor?

In: Physics

Find a basis and the dimension of the subspace: V = {(x1, x2, x3, x4)| 2x1...

Find a basis and the dimension of the subspace:

V = {(x1, x2, x3, x4)| 2x1 = x2 + x3, x2 − 2x4 = 0}

In: Advanced Math

How can the prediction error concept (lambda minus V) from the Rescorla-Wagner model be applied to...

How can the prediction error concept (lambda minus V) from the Rescorla-Wagner model be applied to operant conditioning?

In: Psychology

A pump lifts 1000 (liters) of water from ground to a tank on the roof of...

  1. A pump lifts 1000 (liters) of water from ground to a tank on the roof of a building 100 (m) high. What is the potential energy in the water? [ 1 (liter) = 1000 cm3 ]. Show all your steps to the solution.

  1. A skier is coming downhill. At one point she is 50 (m) above the bottom of the hill and moving at 20 (m/s). What is her speed as she reaches the bottom of the hill?

  1. 22.3 (m/s) b. 37.5 (m/s) c. 44.8 (m/s) d. Cannot say without her mass

  1. A car of mass 1000 (kg) and moving at 60 (mph) collides with a barrier and comes to a stop in

0.5 (s). Ignoring friction, what is the value of the force that acts on the car?

  1. 0 b. 20,000 (N) c. 450, 000 (N) d. 900,000 (N)

  1. A coil spring has an elastic constant of 200 (N/m). If it is compressed by 20 (cm), what is the energy stored in the spring?

  1. 4 (J) b. 10 (J) c. 20 (J) d. 40 (J)

  1. A 60 (kg) sprinter starts from rest and reaches a speed of 12 (m/s) in 6 (s). What is the power that she must have to reach this speed?

  1. 720 (J) b. 720 (W) c. 1440 (W) d. 4320 (J)

15. In the gym a weight-lifter lifts a 50 kg barbell straight up a distance of 50 cm in 0.5 s. What is the work done by the weight-lifter?

  1. 25 (W) b. 250 (J) c. 250 (W) d. 500 (J)

16.In the above question, what is Power of the weight-lifter?

  1. 25 (W) b. 250 (J) c. 250 (W) d. 500 (W)

17.Consider the following situations.

  1. A ball moving at a speed “v” is brought to rest

  2. The same ball is thrown from rests o that it moves at speed “v”

  3. The same ball is moving at speed “v” is brought to rest and reversed in direction to move at speed “v”

In which case does the ball undergo the largest change in momentum?

  1. I b. I and ii c. i, ii and iii d. ii and iii e. iii

  1. A cart moving at a velocity “v” collides with an identical stationary cart on air track. The two carts stick together after collision. What is their combined velocity after the collision?

  1. v b. 0.5 v c. 0 d. – 0.5 v f. Need more information

  1. Two cars, one twice the mass of the other, are stationary on a horizontal road. A person pushes each car separately with the same with the same force for 5 (s). One can say that the momentum of the lighter car compared to the momentum of the heavier car after 5 (s) is

  1. Smaller b. Larger c. Same


  1. A simple pendulum is pulled up in an arc and let go from a stationary position. As it swings back and forth

  1. Its kinetic energy (KE) converts to potential energy (PE) b. Its PE converts to KE

c. Its Potential Energy Converts to Elastic Energy (EE) d. Its EE converts to KE   

e. Its EE converts to PE

In: Physics

To understand the terms in the Doppler shift formula. The Doppler shift formula gives the frequency...

To understand the terms in the Doppler shift formula.
The Doppler shift formula gives the frequency fL
f
L
at which a listener L hears the sound emitted by a source S at frequency fS
f
S
:
fL=fSv+vLv+vS
f
L
=
f
S
v
+
v
L
v
+
v
S
,
where v
v
is the speed of sound in the medium, vL
v
L
is the velocity of the listener, and vS
v
S
is the velocity of source.
Part A Part complete
The velocity of the source is positive if the source is ______________. Note that this equation may not use the sign convention you are accustomed to. Think about the physical situation before answering.
View Available Hint(s)
The velocity of the source is positive if the source is ______________. Note that this equation may not use the sign convention you are accustomed to. Think about the physical situation before answering.
traveling in the +x direction
traveling toward the listener
traveling away from the listener
SubmitPrevious Answers
Correct
Part B Part complete
The velocity of the source is measured with respect to the ________.
The velocity of the source is measured with respect to the ________.
medium (such as air or water)
listener
SubmitPrevious Answers
Correct
Part C
The velocity of the listener is positive if the listener is _____________.
View Available Hint(s)
The velocity of the listener is positive if the listener is _____________.
traveling in the +x direction
traveling toward the source
traveling away from the source
Submit
Part D Complete previous part(s)
Part E
Imagine that the source is to the right of the listener, so that the positive reference direction (from the listener to the source) is in the +x
+
x
direction. If the listener is stationary, what value does fL
f
L
approach as the source's speed approaches the speed of sound moving to the right?
Imagine that the source is to the right of the listener, so that the positive reference direction (from the listener to the source) is in the direction. If the listener is stationary, what value does approach as the source's speed approaches the speed of sound moving to the right?
0
12fS
1
2
f
S
2fS
2
f
S
It approaches infinity.
SubmitRequest Answer
Part F
Now, imagine that the source is to the left of the listener, so that the positive reference direction is in the −x
−
x
direction. If the source is stationary, what value does fL
f
L
approach as the listener's speed (moving in the +x
+
x
direction) approaches the speed of sound?
Now, imagine that the source is to the left of the listener, so that the positive reference direction is in the direction. If the source is stationary, what value does approach as the listener's speed (moving in the direction) approaches the speed of sound?
0
12fS
1
2
f
S
2fS
2
f
S
It approaches infinity.
SubmitRequest Answer
Part G
In this last case, imagine that the listener is stationary and the source is moving toward the listener at the speed of sound. (Note that it is irrelevant whether the source is moving to the right or to the left.) What is fL
f
L
when the sound waves reach the listener?
In this last case, imagine that the listener is stationary and the source is moving toward the listener at the speed of sound. (Note that it is irrelevant whether the source is moving to the right or to the left.) What is when the sound waves reach the listener?
0
12fS
1
2
f
S
2fS
2
f
S
It approaches infinity.
SubmitRequest Answer

In: Physics

When the blood glucose concentration is low, the pancreas secretes glucagon to signal the liver to...

When the blood glucose concentration is low, the pancreas secretes glucagon to signal the liver to produce glucose and glucose-1-phosphate. Which metabolic steps are involved in this biosignaling pathway?

I.

Inactivation of glycogen synthase via phosphorylation by protein kinase A

II.

Activation of glycogen synthase via phosphorylation by protein kinase A

III.

Activation of phosphofructokinase-2 via phosphorylation by protein kinase A

IV.

Activation of fructose-2,6-bisphosphatase via phosphorylation by protein kinase A

V.

Activation of phosphofructokinase-1 by fructose-2,6-bisphosphate

VI.

Inhibition of fructose-1,6-bisphosphatase by fructose-2,6-bisphosphate

VII.

Inactivation of pyruvate kinase via phosphorylation by protein kinase A

A. I, IV, and VII.

B. II

C. I and IV.

D. I, III, V, VI, and VII.

Which biochemical steps are involved in the glucagon-triggered activation of gluconeogenesis?

I.

Activation of fructose-2,6-bisphosphatase via phosphorylation by protein kinase A

II.

Inactivation of fructose-2,6-bisphosphatase via phosphorylation by protein kinase A

III.

Activation of phospholipase C

IV.

Inactivation of phospholipase C

V.

Release of calcium

VI.

Sequestration of calcium

VII.

Phosphorylation of FoxO1

VIII.

Dephosphorylation of FoxO1

IX.

Increased expression of PEP carboxykinase

X.

Phosphorylation of PEP carboxykinase

XI.

Formation of additional PEP, which is a glycolytic intermediate

XII.

Degradation of PEP, which is a glycolytic intermediate

A. I, III, V, VII, X, and XI.

B. II, III, V, VII, IX, and XI.

C. I, III, VI, VII, IX, and XII.

D. I, III, V, VII, IX, and XI.

When the blood glucose concentration is high, the level of cAMP in the liver decreases and glycolytic flux increases. Which biochemical steps occur under this condition?

I.

Protein kinase A is activated.

II.

Protein kinase A is not activated.

III.

Phosphofructokinase-2 is activated via phosphorylation by protein kinase A.

IV.

Phosphofructokinase-2 is activated due to the lack of phosphorylation by protein kinase A.

V.

Fructose-2,6-bisphosphatase is activated via phosphorylation by protein kinase A.

VI.

Fructose-2,6-bisphosphatase is activated due to the lack of phosphorylation by protein kinase A.

VII.

Phosphofructokinase-1 is activated by fructose-2,6-bisphosphate.

VIII.

Phosphofructokinase-1 is inhibited by fructose-2,6-bisphosphate.

IX.

Fructose-1,6-bisphosphatase is activated by fructose-2,6-bisphosphate.

X.

Fructose-1,6-bisphosphatase is inhibited by fructose-2,6-bisphosphate.

A. II, IV, VIII, and IX.

B. II, IV, VII, and X.

C. I, III, VII, and X.

D. II and V.

After glucagon stimulates glucose production via glycogenolysis and/or gluconeogenesis in a liver cell, which steps are required to transport glucose to other cells in the body?

A. Glucose is transported to other cells by the carrier protein GLUT-1.

B. Glucose-6-phosphate is converted to glucose by GLUT-1.

C. Glucose cannot leave the liver cell.

D. Glucose exits the liver cell via GLUT-1 and enters the bloodstream.

In certain smooth muscles, glucagon increases the amount of glucose available for glycolysis; under this condition, which enzyme is required to convert glucose-1-phosphate into a glycolytic intermediate?

A. No enzyme is needed for this conversion.

B. G6Pase.

C. Glucokinase (or hexokinase).

D. Phosphoglucomutase.

In: Biology