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3 years ago

There is fluctuation in time measured by a pendulum clock why give reasons

1 answer:

3 0

A major source of error in pendulum clocks is thermal expansion; the pendulum rod changes in length slightly with changes in temperature, causing changes in the rate of the clock. An increase in temperature causes the rod to expand, making the pendulum longer, so its period increases and the clock loses time.

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8. John has to hit a bottle with a ball to win a prize. He throws a 0.4 kg ball with a velocity of 18 m/s. It hits a 0.2 kg bott

nasty-shy [4]

Answer: The ball is travelling with a speed of 5.5 m/s after hitting the bottle.

Explanation:

To calculate the speed of ball after the collision, we use the equation of law of conservation of momentum, which is given by:

$m_1u_1+m_2u_2=m_1v_1+m_2v_2$

where,

$m_1,u_1\text{ and }v_1$ are the mass, initial velocity and final velocity of ball.

$m_2,u_2\text{ and }v_2$ are the mass, initial velocity and final velocity of bottle.

We are given:

$m_1=0.4kg\\u_1=18m/s\\v_1=?m/s\\m_2=0.2kg\\u_2=0m/s\\v_2=25m/s$

Putting values in above equation, we get:

$(0.4\times 18)+(0.2\times 0)=(0.4\times v_1)+(0.2\times 25)\\\\v_1=5.5m/s$

Hence, the ball is travelling with a speed of 5.5 m/s after hitting the bottle.

5 0

3 years ago

9. The UL panel on the bottom of an electric toaster oven indicates that it operates at 1500 W on a 110 V circuit. Determine the

BigorU [14]

Answer:

8.067 ohms

Explanation:

The relationship between voltage, resistance, and power is ...

P = V²/R

so ...

R = V²/P = 110²/1500 = 8 1/15

R ≈ 8.067 . . . ohms

5 0

4 years ago

How many newtons of force are represented by the following amount: 3 kg.m/sec2

alekssr [168]

I believe the answer is 3 Newtons!

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3 years ago

A car, starting from rest, accelerates in a straight-line path at a constant rate of 2.0 m/s2. How far will the car travel in 12

Kryger [21]

Same formula as the last question. x = vt + (1/2)at^2. In this case, v = 0, t = 12, and a = 2.0. Plug in the values and solve for x (which is change in position) x = (0)(12) + (1/2)(2.0)(12^2) x = (1/2)(2.0)(144) x = (1)(144) x = 144 So the car will travel 144 meters in 12 seconds.

8 0

3 years ago

What is the weight in pounds of a 7.0 kilogram bowling ball on earth's surface

hodyreva [135]

Gravitational field strength (GFS) on earth =10 N/kg

Weight = GFS x mass
W = 10 x 7
W = 70N
70N = 15.74 pounds

3 0

3 years ago

Read 2 more answers

There is fluctuation in time measured by a pendulum clock why give reasons​

There is fluctuation in time measured by a pendulum clock why give reasons