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natita [175]
3 years ago
6

In a scientific experiment, the variable manipulated or controlled by the experimenter is called the

Physics
2 answers:
Naddik [55]3 years ago
7 0

Independent.

The independent variable is manipulated and the effects are noted.

miskamm [114]3 years ago
3 0
Answer:
The variable manipulated or controlled by the experimenter is called the independent variable.

Example:
If the flow velocity at the bottom of a tank is measured by varying the height of water in the tank, we are measuring velocity as a function of water height.
Therefore,
water height  =  independent variable (controlled)
velocity =  dependent variable (measured in response to water height).

Mathematically,
v = f(h)
where v =  response variable (dependent)
            h = controlled variable (independent).
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With each bounce off the floor, a tennis ball loses 18% of its mechanical energy due to friction. When the ball is released from
lora16 [44]

Answer:

130 cm

Explanation:

After each bounce, the mechanical energy decreases by 18%, which means the maximum height decreases by 18%.  Modeling this as exponential decay:

h = 290 (1 − 0.18)ⁿ

h = 290 (0.82)ⁿ

h = 290 (0.82)⁴

h = 130

The ball reaches a height of 130 cm.

8 0
4 years ago
Read 2 more answers
A bowler throws a ball down the lane toward the pins. The ball reaches the pins and slowly moves through them, knocking down the
Iteru [2.4K]

Answer:

First one

Explanation:

Maybe because example if a ball that has less mass bounces higher than the one w/more , then a bowling ball should be able with more force.

hope that helped:/

6 0
3 years ago
How is photon energy calculated? (choose 2)
Lady_Fox [76]

Answer:

Explanation:

Based on the wave model of light, physicists predicted that increasing light amplitude would increase the kinetic energy of emitted photoelectrons, while increasing the frequency would increase measured current.

Contrary to the predictions, experiments showed that increasing the light frequency increased the kinetic energy of the photoelectrons, and increasing the light amplitude increased the current.

Based on these findings, Einstein proposed that light behaved like a stream of particles called photons with an energy of \text{E}=h\nuE=hνstart text, E, end text, equals, h, \nu.

The work function, \PhiΦ\Phi, is the minimum amount of energy required to induce photoemission of electrons from a metal surface, and the value of \PhiΦ\Phi depends on the metal.

The energy of the incident photon must be equal to the sum of the metal's work function and the photoelectron kinetic energy:

3 0
4 years ago
Read 2 more answers
Calculate the specific heat capacity of a piece of wood if 150.0g of the wood absorbs 67,000 joules of heat, and it’s temperatur
svet-max [94.6K]

Answer:

17.8 J/g^{\circ}C

Explanation:

When a certain amount of substance is supplied with a certain amount of energy Q, the temperature of the substance increases according to the equation

Q=mC\Delta T

where

m is the mass of the substance

C is the specific heat capacity

\Delta T is the change in temperature

In this problem:

m = 150.0 g is the mass of wood

Q=67,000 J is the amount of energy supplied to the wood

\Delta T=55-30=25^{\circ}C is the increase in temperature of the substance

Therefore, the specific heat capacity is:

C=\frac{Q}{m\Delta T}=\frac{67,000}{(150.0)(25)}=17.8 J/g^{\circ}C

5 0
3 years ago
If a car takes a banked curve at less than the ideal speed, friction is needed to keep it from sliding toward the inside of the
exis [7]

Answer:

ideal speed(v)≅17m/s

Explanation:

Given: Radius, r = 110 m

Angle(α) = 15°

g=9.81m/s^{2}

Find; (a) The ideal speed, v.

tanα=\frac{v^{2} }{rg}

make V subject of the formula;

v=\sqrt{rgtan\alpha }

v=\sqrt{110 * 9.81* tan15}

v=\sqrt{289.144}

v≅17m/s

3 0
3 years ago
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