07/26/20

How to do this ?
Why do the Venuses vary in size? Please explain the reason.
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07/24/20

Astronomy Wein’s Formula
1. Using the graph that you constructed and from the graph estimated λmax (the best you can) for the following cases:λmax (5000 K) =                    λmax (5500 K) =... more
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07/21/20

In considering question #4, how fast is the mass moving when it is half way between the equilibrium and maximum amplitude, AND what is the kinetic and potential energies at that location?

Here is Question Four: 4. A 27.8 gram mass oscillates on the end of a spring and its motion can be described by: x = (1.5) * sin (21.4t) [here the units are standard, meters and seconds] What are... more
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07/17/20

A student applies a force of 150 N on a 15 kg box by using a rope held at an angle of 35º above the horizontal. The coefficient of friction between the box and the surface is 0.90...
A student applies a force of 150 N on a 15 kg box by using a rope held at an angle of 35º above the horizontal. The coefficient of friction between the box and the surface is 0.90.a) Calculate the... more
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07/16/20

A bank offers two different retirement savings plans to its customers.

For the first offer, the bank will match every dollar deposited up to $450, at which point all funds in the account will collect 3% interest annually. The second offer has no price matching, but... more
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07/12/20

An airplane is flying in the direction 140° with an airspeed of 450 mi/hr, and a 30 mi/hr wind is blowing in the direction 65°.
An airplane is flying in the direction 140° with an airspeed of 450 mi/hr, and a 30 mi/hr wind is blowing in the direction 65°. As shown in the figure, these facts may be represented by... more
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07/03/20

How do you convert this into an algebraic equation?
sin(arcsin u - arctan v)
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06/27/20

A crate of mass 100.0 kg rests on a rough surface inclined at an angle of 37.0° with the horizontal.

A crate of mass 100.0 kg rests on a rough surface inclined at an angle of 37.0° with the horizontal. A massless rope to which a force can be applied parallel to the surface is attached to the crate... more
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06/27/20

How to do this?
Using the longitude of Kuala Lumpur which is 101 E, calculate the local time when the local solar time is 12:00. Please explain the reason.
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06/27/20

Kinematics Horizontal Motion Problem
A projectile is fired at 28 m/s at an angle of 33 degrees with the horizontal from a point 75 m above the ground. How long did it take for the projectile to hit the ground below? How far did the... more
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06/25/20

An automobile travels along a straight road at 15.65 m/s through a 11.18 m/s speed zone. A
An automobile travels along a straight road at 15.65 m/s through a 11.18 m/s speed zone. A police car observed the automobile. At the instant that the two vehicles are abreast of each other,... more
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06/25/20

solution with this problem please
The block is released from rest at the position shown, figure 1. The coefficient of kinetic friction over length ab is 0.22, and over length bc is 0.16. Using the principle of work and energy, find... more
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06/24/20

I NEED THESE REALLY BADLY PLZ
Data for coronavirus for US is shown.number of days Total number of infection0 110 620 ... more
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06/19/20

The voltage is 125 v
a) on an LED tv with an overall internal resistance of 24.0 Ω. How much current will the television draw?b) if they watch for 12.5 hours how much does it cost to power the television if the cost is... more
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06/19/20

Homework I need the right answer

A 30 kg box moving at a speed of 4 m/s is brought to a stop in 0.6 sec. What force is required? Show your work.?
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06/17/20

If a ball is thrown into the air with a velocity of 46 ft/s, its height in feet t seconds later is given by y = 46t − 16t2.
(a) Find the average velocity for the time period beginning when t = 2 and lasting for each of the following.(i)    0.5 seconds =_______ ft/s(ii)    0.1 seconds =_______ ft/s(iii)    0.05... more
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06/16/20

Astrophysics and astronomy equations
Star A and star B are both on the main sequence. Star A is 56 times more luminous than star B. What is the ratio of their main-sequence lifetimes? Refer to the stellar life expectancies equation
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06/12/20

Special Case of Uniform Circular Motion
A car approaches a semi-circle horizontal turn with a radius of curvature of 15 meters. If the car starts the turn at a speed of 105 km/h and ends the turn at a speed of 55 km/h what is the... more
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06/12/20

Physics question about pulleys.
Two particles P and Q have masses m kg and (1 - m) kg respectively. The particles are attached to the ends of a light inextensible string which passes over a smooth fixed pulley. P is held at rest... more
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06/12/20

Help me with this word problem?
A manufacturer of calculators produces two models: standard and scientific. Long-term demand for the two models mandates that the company manufacture at least 110 standard and 40 scientific... more
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06/08/20

A radar operating at a wavelength of 4 cm is to have a resolving power of 34 m at a range of 2 km. Find the minimum width its antenna must have. Round your final answer to two decimal places.

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06/07/20

A raft 4.6 m long, 1.8 m wide, and 32 cm thick, made from solid balsa wood, is floating in a freshwater lake. How many 63 kg people can it support? Round down your final answer to the nearest integer.
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06/07/20

How many kJ of heat are needed to raise the temperature of 467 g of water from 21°C to 100°C in preparing a cup of coffee? Round your answer to the nearest integer. ?kJ
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06/03/20

Write the net ionic equation for when silver I acetate and copper ii iodide are combined

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06/03/20

Question in description

The arch of the Sydney Harbor Bridge in Sidney, Australia, can be modeled by y=-0.00211x^2+1.06x where x is the distance (in meters) from the left pylons and y is the height (in meters) of the arch... more
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