12,727 Answered Questions for the topic physics

Physics

11/19/22

How to Find Tension
A 1-kg bird sits on the middle of a clothesline whose supports are 10m apart. The clothesline sags by 1m. If the weight of the clothesline is negligible, find the tension on it.I would really... more
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Physics

11/19/22

the absolute electric potential at a point 48cm away from a charged particle is 1.5 microvolt. find the charge of the charged particle
help me
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Physics

11/18/22

A 0.74 kg projectile is fired into the air from the top of a 8.11 m cliff above a valley.

Its initial velocity is 8.2 m/s at 36 ◦ above the horizontal. How long is the projectile in the air? The acceleration due to gravity is 9.8 m/s 2 . Answer in units of s.How far from the bottom of... more
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Physics

11/17/22

 Iron is submerged in water question
A scale reads 234 N when a piece of iron is hanging from it. What does it read (in N) when it is lowered so that the iron is submerged in water?
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Physics

11/17/22

How far below the surface of the water is the boat's bottom when it is floating in water?
A boat (with a flat bottom) and its cargo weigh 6,600 N. The area of the boat's bottom is 9 m2. How far below the surface of the water is the boat's bottom when it is floating in water?
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Physics

11/17/22

Compute its maximum payload at sea level
A modern-day zeppelin holds 9,860 m3 of helium. Compute its maximum payload at sea level. (Assume the helium and air to be at 0°C and 1 atm.)
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Physics

11/17/22

How much corn oil must the bowl displace in order to float?
A metal bowl with a weight of 1.50 N is placed in a larger kitchen container filled with corn oil. How much corn oil must the bowl displace in order to float? For reference, the mass density... more
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Physics Chemistry

11/17/22

A dog runs 2 kilometers in 10 minutes. What is the dog's speed?
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Physics Chemistry

11/17/22

A train travels 20 miles in 40 minutes. What is the speed of the train?

I don't really understand how to do this
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Physics

11/17/22

the mass M = 1 kg rests on a horizontal plane. Calculate the maximum value of the angle θ0 between the mass m and the vertical axis, that does not produce the displacement of mass M.
the mass M = 1 kg rests on a horizontal plane. The coefficient of static friction relative to the contact between the body and the plane isμs = 0.5. An inextensible wire of negligible mass,... more
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Physics

11/16/22

A ball thrown horizontally at 35 m/s travels a horizontal distance of 59 m before hitting the ground. Air resistance is negligible. From what height was the ball thrown?

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Physics

11/16/22

This is a physics question

A 6.00 kg block rests on a plane with a coefficient of friction of 0.10 and set at a 30-degree angle with respect to the horizontal. It is attached to a rope wrapped around a 4.66 kg drum with a... more
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Physics

11/16/22

Please help , physics question
A car moving at 49 km/h skids 12m with locked breaks. How far will the car skid with locked brakes at 122.5 km/h ? Assume that energy loss is due only to sliding friction. Answer in units of m.
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Physics

11/15/22

Projectile Motion... HELP ASAP!
You are standing at the top of a cliff that has a stairstep configuration. There is a vertical drop of 7 m at your feet, then a horizontal shelf of 5 m , then another drop of 3 m to the bottom of... more
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Physics

11/15/22

Projectile Motion
During World War I, the Germans had a gun called Big Bertha that was used to shell Paris. The shell had an initial speed of 1.75 km/s at an initial inclination of 27◦ to the horizontal. The... more
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Physics

11/15/22

Projectile Motion
You are standing at the top of a cliff that has a stairstep configuration. There is a vertical drop of 7 m at your feet, then a horizontal shelf of 5 m , then another drop of 3 m to the bottom of... more
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Physics

11/15/22

Projectile Motion
A hiker makes four straight-line walks A= 28 km at 77 degrees B= 32 km at 296 degrees C= 24 km at 27 degrees D=19 km at 83 degrees in random directions and lengths starting at position (41 km, 41... more
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Physics

11/15/22

Projectile Motion
During World War I, the Germans had a gun called Big Bertha that was used to shell Paris. The shell had an initial speed of 1.75 km/s at an initial inclination of 27◦ to the horizontal. The... more
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Physics

11/14/22

Should I label the points on best line that I chose when I did slope calculation

When I did my slope calculation I had to pick 2 points on best line. Should I label them ?
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Physics

11/14/22

Projectile Motion
Assume: A 78 g basketball is launched at an angle of 46.7 ◦ and a distance of 18.6 m from the basketball goal. The ball is released at the same height (ten feet) as the basketball goal’s height. A... more
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Physics

11/14/22

Projectile Motion
A man can throw a ball a maximum horizontal distance of 193 m. The acceleration of gravity is 9.8 m/s 2 . How far can he throw the same ball vertically upward with the same initial speed? Answer in... more
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Physics

11/14/22

Deformation of solids

A cast Iron block is used to hold up a beaker of mercury. The face of the block that supports the mercury is 2.5cm2. The blocks length changes by 0.01% (1/10000 the original length). The beaker has... more
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Physics

11/14/22

A car is travelling at 67mph (30m/s) when the driver steps on the brake slowing the car down at a rate of 3m/s2. How long and what distance will be required for the car to stop on dry pavement?
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Physics

11/14/22

The electric motor of a model train accelerates the train from rest to 0.620 m/s in 21.0 ms. The total mass of the train is 875 g.

(a) Find the minimum power delivered to the train by electrical transmission from the metal rails during the acceleration. (b) Why is it the minimum power?
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Physics

11/14/22

green bead mass 25 g slides along straight wire length of the wire from A to B is 0.600 m, and point A is 0.200 m higher than point B . A constant friction force of magnitude 0.0250 N acts on the bead
(a) If the bead is released from rest at point A , what is its sp eed at point B ? (b) A red bead of mass 25 g slides along a curved wire, subject to a friction force with the same constant... more
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