12,762 Answered Questions for the topic physics

08/23/22

Tent pole question
A 2.3 m tent pole is supported by a 2.7 m rope anchored in the ground some distance from the foot of the pole. Find the angle between the ground and the rope, to the nearest degree. (3 marks)
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Physics

08/23/22

Eliot supplied 2000 calories of heat to 500 grams of lead at 25°C.

What is the final temperature of the lead? The specific heat capacity of lead is 0.031 cal/g°C.
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Physics

08/23/22

The heat required to raise 3kg of copper from 0°C to 10°C raises 1 kg of lead from 10°C to 100°C.

If the specific heat capacity of copper is 0.095 cal/g°C, find the specific heat capacity of lead.
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Physics

08/23/22

Elon took 300g of water and supplied 8000 joules of heat to it.

What is the change in temperature of the water? (Specific heat capacity of water is 4.2 /g°C^-1)
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Physics

08/23/22

John found that the temperature of her aluminium container of mass 500g fell from 50°C to 35°C.
Calculate the amount of heat lost by the container. The specific heat capacity of aluminium is 900]/Kg°C.
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Physics Chemistry

08/23/22

Physics & Chemistry Question...
Dear experts,Im having trouble answering the following question:How many calories (cal) does it take to bring 80liters of water from 20 ° C to 80 ° C?0 4800 kcal0 1.5 kcal0 1600 cal0 3200 kcal0... more
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Physics

08/22/22

Slope of a line
The coordinates of two points are required for the calculation of a slope of a line, please explain why those points should be spaced wide apart
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Physics

08/21/22

Physics (vector) Question

Dear experts,Im having an issue understanding the following Physics question...The vector product between two vectors of known intensity is maximum when:1) the scalar product between the same... more
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Physics

08/21/22

Physics 101 problem
The following formula estimates an average person’s lungcapacity V (in liters, where 1 L = 103 cm3): V = 4.1H - 0.018A - 2.7,where H and A are the person’s height (in meters) and age (in years),... more
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Physics

08/21/22

Word problem physics 101
Estimate how many days it would take to walk around the Earth, assuming 12 h walking per day at 4 km/h.
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Physics

08/21/22

Physics 101 word problem
Computer chips are etched on circular silicon 44. wafers of thickness 0.300 mm that are sliced from a solid cylindrical silicon crystal of length 25 cm. If each wafer canhold 400 chips, what is the... more
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Physics

08/21/22

Physics 101 word problem

A standard baseball has a circumference of approxi- mately 23 cm. If a baseball had the same mass per unit volume as a neutron or a proton, about what would its mass be?
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Physics

08/21/22

Multiply 3.079 * 102 m by 0.068 * 10–1 m, taking into account significant figures
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Physics

08/21/22

What is the percent uncertainty in the measurement 5.48 +/- 0.25m?
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Physics

08/21/22

Conversion ft squared to yd squared
To convert from ft2 to yd2, you should (a) multiply by 3.(b) multiply by 1/3.(c) multiply by 9.(d) multiply by 1/9.(e) multiply by 6.(f) multiply by 1/6.
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Physics

08/21/22

Physics 101 question
At time t = 0 an object is traveling to the right along the ±x axis at a speed of 10.0 m􏰀s with acceleration –2.0 m􏰀s2. Which statement is true?(a) The object will slow down, eventually coming to... more
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Physics

08/17/22

Physics scientific notation

If the volume of an olympic swimming pool is 2,500 m3 and the volume of a ping pong ball is 3.351×10-5 m3, how many ping pong balls would it take to fill the pool?You go on Amazon and find a pack... more
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Physics

08/16/22

in the united states electrical system the electric current in a 75 watt light bulb is 6,250mA. What is this current in amperes
i don’t know
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Physics

08/15/22

How long is a simple pendulum with a period of 5 seconds? How long would this pendulum have to be if it were to operate on the moon

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Physics

08/15/22

How long is a simple pendulum with a period of 5 seconds? How long would this pendulum have to be if it were to operate on the moon

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Physics Math Geometry

08/12/22

Shortest Distance Question
Find the shortest distance from point (2, 3) to the line through (–3, 2) and (1, –4). (8 marks) Please answer in detail
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Physics

08/09/22

A metal rod of length 2 meters and diameter 1.5 centimeters has mass 2.827 kilograms. What is its density in kilograms per cubic meter?
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08/09/22

Question dealing with Physics, specifically working with spherical coordinates, uni level.
The spherical coordinates of a circular ring are a, α. A sphere of relative capacitivity K and radius b has the origin as its center. If the ring carries a charge of linear density τ, find the... more
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Physics

08/08/22

What's the distance between the stoplights?
A car starts from rest at a stoplight and in 8 seconds reaches a speed of 72 km/h. It goes on at that speed for 20 seconds to then stops at another stoplight in 4 seconds. What's the distance... more
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Physics Math

08/05/22

Find the Maximum height reached
A stode is thrown upward so that any time x (in second) after throwing, the height of the stone is y=100+10x-5x^2 (in meter) . Find the maximum height reached?
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